Answer:
// here is code inn c++.
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// variable
int t;
double acc=32;
cout<<"Enter the time in seconds:";
// read the time in seconds
cin>>t;
// Calculate the distance=acceleration x time-squared divided by 2
double dis=acc*(t*t)/2;
// print the distance
cout<<"distance is: "<<dis<<" feet."<<endl;
return 0;
}
Explanation:
Read the time in seconds from user and assign it to variable "t". declare and initialize variable "acc" with 32.Find the distance as "dis=acc*(t*t)/2". Print the distance.
Output:
Enter the time in seconds:10
distance is: 1600 feet.
Complete the following conversions. You MUST show all of your work to receive full credit.
Convert the following decimal numbers to binary.
a. 357
b. 67
c. 252
d. 65000
e. 5795
Answer:
a. 101100101
b. 1000011
c. 11111100
d. 1111110111101000
e. 1011010100011
Explanation:
To convert any decimal number to binary you need to make a succession of divisions by 2, in the image I provide, you can see how the process was done, every time you divide your number by 2 you'll have a remainder, being this 0 or 1, this will become your binary number. It's important to notice that using this method you'll divide from right to left, but you'll take your remainders in the opposite direction (right to left) to form your binary number.
Hope you find this information useful! Good luck!
To convert decimal numbers to binary, divide by 2 and record the remainders until the quotient is zero. The binary representation is then read from the bottom up. This method is applied to convert the given decimal numbers to their binary equivalents.
Explanation:Converting decimal numbers to binary requires dividing the number by 2 and recording the remainder until the quotient is 0. Here's how you can convert the given decimal numbers to binary:
a. 357 in binary: Divide 357 by 2, remainder is 1, quotient is 178. Continue this process until the quotient is 0. The binary number will be the remainders read in reverse order: 101100101.b. 67 in binary: Same process as above, resulting in 1000011.c. 252 in binary: Following the same steps, we arrive at 11111100.d. 65000 in binary: This larger number follows the pattern, converting to 1111110110010000.e. 5795 in binary: After converting, the binary equivalent is 1011010010011.
What is back propagation?
Answer:
Back propagation is the algorithm which is basically used o improve the accuracy in the machine leaning and data mining. It is one of the most important tool in the mathematics to check the prediction with high accuracy.
The back propagation is also known as backward propagation and it is mainly used in the ANN (Artificial neural network).
The important features of the back propagation is that it has high efficiency for improving the networks. It is also recursive and iterative methods and ability to perform various tasks.
Final answer:
Back propagation is an algorithm used to train neural networks by minimizing the output error through gradient descent. It involves adjusting the weights of neurons based on the error gradient, which is calculated using the chain rule. The process leverages activation functions to allow the learning of complex patterns.
Explanation:
Back propagation is a fundamental algorithm used in the training of artificial neural networks. It is a supervised learning technique that adjusts the weights of the neurons in the network. The main goal of back propagation is to minimize the error in the output of the neural network by propagating the error backward through the network and updating the weights accordingly.
The process begins by feeding the network an input and letting it pass through the layers to produce an output. This output is then compared with the desired output, and the difference between them is the error. Back propagation takes this error and calculates the gradient of the loss function with respect to each weight in the network using the chain rule of calculus. The weights are then adjusted in the opposite direction of the gradient to reduce the error. This is typically done using an optimization algorithm like gradient descent.
An important component of back propagation is the use of activation functions which add non-linear properties to the network, allowing it to learn more complex patterns. During back propagation, derivatives of these activation functions are vital as they are involved in calculating the gradients.
Overall, back propagation is an iterative process, where multiple epochs of training may be necessary to reach the desired level of accuracy.
. The __________ logical operator works best when testing a number to determine if it
is outside a range.
Answer:
The OR logical operator works best when testing a number to determine if it is outside a range
Explanation:
The answer to this statement is:
The OR logical operator works best when testing a number to determine if it is outside a range
The concept of logical operators is simple. They allow a program to make a decision based on multiple conditions
The AND (&&) operator is used to determine whether both operands or conditions are true
The NOT (!) operator is used to convert true values to false and false values to true. In other words, it inverts a value
The OR ( || ) operator is used to determine whether either of the conditions is true. If the first operand of the || operator evaluates to true, the second operand will not be evaluated.
An instance of an object is (Points : 2) a block of COBOL code
one occurrence of the object
very small
a large number of input records
Answer: One occurrence of the object
Explanation:
The instance of the object is the one occurrence of an object in the given class. The common statement of an object with respect to the instance means that there is single occurrence of an object.
When the process run at each time it is known as instance of program given specific values and variables. An instance of the object is also known as class instance.
It is basically defined as specific realization in an object and also the object varies in different number of the ways in the object oriented programming (OOPs).
What is a milestone? Provide a few examples of milestones.
Answer:
A milestone is a significant progress point within your project. Milestones' main purpose is to set goals you have to achieve in order to succeed and complete your project
Explanation:
-Example 1-
You have to write a report for your project. This report contains introduction, problem background, results, and recommendations. The milestones for writing your report could be:
Milestone 1: introduction section is completed
Milestone 2: problem background section is completed
Milestone 3: results section is completed
Milestone 4: recommendations section is completed
-Example 2-
You have to design a webpage that allows the user to login, enters his/her name, and logout. The milestones in this case could be:
Milestone 1: login functionality is completed
Milestone 2: text field for typing the name is placed
Milestone 3: submit name button functionality is completed
Milestone 4: logout button functionality is completed
Milestone 5: all components of the webpage are fully integrated
You might think the goals in these examples can be set differently, and that is true. The definition of the milestones is in general subjective and it depends on how you design the steps you want to follow to complete your project. You might also want to add these milestones to a timeline so you have an estimated schedule of the development of your project.
A milestone is a significant event or stage that marks progress in development, used to evaluate skill or project achievement. Examples include motor skills like walking, language development like the first word, and project management deliverables.
A milestone is a significant event or point in development that marks an important stage in a project, process, or a person's life. They often serve as indicators of progress and can be used to evaluate achievement or skill level in various domains.
Examples of Milestones:
Motor milestones: These refer to crucial developmental steps in an individual's motor skills, like sitting up, crawling, and walking.
Language milestones: These are critical steps involved in the development of language skills, such as the onset of babbling, the first word, and the combining of words.
Project milestones: These might include deliverables established, a timeline for when remaining work will be completed, and noting any problems that may affect project scope or direction.
Milestones are also used in different contexts, such as educational achievements (like graduating from school), professional development (like receiving a promotion), or personal growth (like buying a first home). In project management, they often involve establishing a direct reference to milestones or deliverables, scheduling the completion of remaining tasks, and identifying any issues that could impact the project's trajectory. Effective use of milestones helps in keeping projects on track and allows for the evaluation of progress over time, which is crucial for success.
Write a function that receives an integer list from STL and returns the sum of even numbers in the list (return zero if no even number is in the list)
Answer:
int sumeven(int lis[],int n)
{
int sum_e=0;//integer variable to store the sum.
for(int i=0;i<n;i++)
{
if(lis[i]%2 == 0)//if the number is even adding to sum_e.
sum_e=sum_e+i;
}
return sum_e;//retuning the sum.
}
Explanation:
The above written function is in C++.This function find the sum of even numbers in the list provided.It loops over the array and if the number is even adds to the variable sum_e finally return sum_e which having the sum of even numbers now.
Every element in an array always has the same data type. Necessary ?
Answer:
False.
Explanation:
Every element in the array is always have same data type.
Array is the collection of items of same data type stored in contiguous memory location.
So as the definition suggests that array elements always have same data type.
But it is not necessary there are some languages that can allow array elements to be different types such as javascript,python.But traditional languages such as C,C++,Java does not allow this.
supppose we already have a list called words, containing all the words(i.e., string).Write code that produce a sorted list with all duplicate words removed. For example, if words ==['hello', 'mother','hello','father','here','i','am','hello'], your code would produce the list ['am','father','hello','here','i','mother'].
Answer:
I will code in Javascript.
//define and initialize both arrays.
var words = ['hello', 'mother','hello','father','here','i','am','hello'];
var sortedList = [];
for ( var i = 0; i < words.length ; i++ ){ //loop used to go throght the words
var duplicated = false; // boolean used for detect duplicates
for ( var j = i + 1; j < words.length ; j++ ) { //loop used to compare with other words
if( words[i] == words[j] ) { //if the word is duplicated, duplicated becomes true.
duplicated = true;
break;
}
}
if (! duplicated) { //if at the end of the loop of each word duplicated is false, then the element is pushed into sortedList.
sortedList.push(words[i]);
}
}
sortedList.sort(); //when the loop is finished, use the Javascript method to sort an array.
Write a program which asks the user his/ her last name, stores it in a variable called lname, then asks What is your age? and stores it in a variable called age. After this, the program displays a userid, for example as follows: What is your last name? Jones What is your age? 20 Your user id is: Jones20
Answer:
// program in C++.
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// variables
int age;
string lname;
cout<<"Enter your last name:";
// read last name
cin>>lname;
cout<<"Enter your age:";
// read age
cin>>age;
// print user id
cout<<"Your user id is: "<<lname<<" "<<age<<endl;
return 0;
}
Explanation:
Read last name from user and assign it to variable "lname".Then read age from user and assign it to variable "age".After this print the user id as last name followed by age.
Output:
Enter your last name:singh
Enter your age:24
Your user id is: singh 24
Immediate address is determined by a value in a register.
True
False
Answer: False
Explanation:
The given statement is false as, in the immediate addressing the value of operand is basically store in the instruction.
In the register addressing the address filed is basically denote as the register which contain the operand.
In the immediate addressing, the mode of the data is the specific part of the instruction and the operand is basically specify in instruction of the immediate addressing itself.
What is the value of y when this code executes?
def foo(x) :
if x >= 0 :
return 6 * x
y = foo(-10)
y = None
y = 60
y = -60
y = 20
Answer:
The operation of 6*x only executes if x is greater or equal to 0, since x=-10 and -10 is less than 0, the operation does not execute. For this reason, the value of y using this code is None.
Explanation:
In python a function is defined with the syntaxis:
def function(x):
the operation to execute (x)
value to return
In this case, the function is foo and the parameter is x:
def foo(x):
if x>= 0:
return 6*x
The code starts by assigning a value to x. Then, the code asks if the value of x is grater or equal to 0, if this condition is meet, then the code returns the value of 6 times x, if not, then the code does not return a value. In this case, x is -10 and this value is not grater or equal to 0. Given that the condition is not met, then the code stops executing and the value of y is none.
c++ 2.30 LAB: Phone number breakdown Given a long long integer representing a 10-digit phone number, output the area code, prefix, and line number, separated by hyphens. Ex: If the input is: 8005551212 the output is: 800-555-1212 Hint: Use % to get the desired rightmost digits. Ex: The rightmost 2 digits of 572 is gotten by 572 % 100, which is 72. Hint: Use / to shift right by the desired amount. Ex: Shifting 572 right by 2 digits is done by 572 / 100, which yields 5. (Recall integer division discards the fraction). For simplicity, assume any part starts with a non-zero digit. So 999-011-9999 is not allowed. LAB
Answer:
#include <iostream>
using namespace std;
int main()
{
//declare variable to store phone numbers,its area code, prefix and line number.
long phone_number;
int area_code, prefix,line_number;
cout<<"Enter 10-digit phone number:"<<endl;
//input 10-digit phone number
cin>>phone_number;
//logic to find area_code, prefix, and line_number.
area_code = phone_number/10000000;
prefix = (phone_number/10000)%1000;
line_number = phone_number%10000;
//output phone number in asked format.
cout<<area_code<<"-"<<prefix<<"-"<<line_number<<endl;
return 0;
}
Output:
Enter 10-digit phone number:
8005551212
800-555-1212
Explanation:
In the above program 10 digit phone number entered by user will be stored in the variable phone_number.
Then using this phone_number variable area_code, prefix, and line number are calculated using the following logic:
area_code = phone_number/10000000;
prefix = (phone_number/10000)%1000;
line_number = phone_number%10000;
Finally these area_code, prefix, and line_number are displayed with hyphen in between using cout statement.
The C++ program reads a 10-digit phone number, then extracts and prints its area code, prefix, and line number, separated by hyphens. It uses division and modulo operations to isolate the desired digits, ensuring non-zero starting digits for simplicity.
Here's a C++ solution for your problem:
```cpp
#include <iostream>
using namespace std;
int main() {
long long phoneNumber;
cout << "Enter a 10-digit phone number: ";
cin >> phoneNumber;
int areaCode = phoneNumber / 10000000;
int prefix = (phoneNumber / 10000) % 1000;
int lineNumber = phoneNumber % 10000;
cout << "Phone number breakdown: " << areaCode << "-" << prefix << "-" << lineNumber << endl;
return 0;
}
```
This C++ program reads a 10-digit phone number as a long long integer. It then extracts the area code, prefix, and line number using the given hints and prints them separated by hyphens.
The ________ maps the software architecture created in design to a physical system architecture that executes it. (Points : 3) architectural diagram
sequence diagram
deployment diagram
state chart diagram
Answer:Deployment diagram
Explanation: Deployment diagram is the diagram that is used for displaying the hardware parts upon which the software architecture works.The main purpose of the diagram is showing the function and operations taking place through the deployment of the software system with the hardware.
These diagrams are made up of the nodes , interface, artifacts and other components. Other given options are incorrect because architectural diagram is for designing of the architecture of a system,sequence diagram is used for the sequential order display of system components and state chart diagram is the diagram that shows the status of the parts of the operating system.
Therefore, the correct option is deployment diagram.
Write a program that has a while loop to print out the first five multiples of 15, 43, and 273 between the numbers of 3168 and 376020. Put each of the three sets of multiples on a new line.
Answer:
#include <iostream>
using namespace std;
void printmultiples(int n) //function to print first five multiples between 3168 and 376020
{
int a =3168,c=1;
cout<<"First five multiples of "<<n<<" are : ";
while(a%n!=0 && a<=376020) //finding first mutiple of n after 3168.
{
a++;
}
while(c<6)//printing multiples.
{
cout<<a<<" ";
a+=n;
c++;
}
cout<<endl;
}
int main() {
int t,n;
cin>>t;//How many times you want to check.
while(t--)
{
cin>>n;
printmultiples(n);//function call..
}
return 0;
}
Input:-
3
15
43
273
Output:-
First five multiples of 15 are : 3180 3195 3210 3225 3240
First five multiples of 43 are : 3182 3225 3268 3311 3354
First five multiples of 273 are : 3276 3549 3822 4095 4368
Explanation:
I have used a function to find the first five multiples of the of the numbers.The program can find the first five multiples of any integer between 3168 and 376020.In the function I have used while loop.First while loop is to find the first multiple of the integer n passed as an argument in the function.Then the next loop prints the first five multiples by just adding n to the first multiple.
In the main function t is for the number of times you want to print the multiples.In our case it is 3 Then input the integers whose multiples you want to find.
The essence of strategy is ____, so competitive advantage is often gained when an organization tries a strategy that no one has tried before.
change
innovation
moving
work
Answer: Innovation
Explanation: Strategy is the planning for the execution of any task so that objective can be achieved. The strategy in organization is made for the long term goals which involves the participation of the the organizational elements from each level.
Innovation is the change in the organization in order to increase the creativity which is considered as the essence of organization. This helps in gaining the benefits such as increasing productivity, competitive advantage.
Other options are incorrect because change can be negative or positive for the organization, moving is the execution of the business work and work is the tasks of the organization.thus, the correct answer is innovation.
What is the difference between a class and an object?
Explanation:
The difference between a class and an object is very simple a class is a template for objects.A class contains objects,methods,constructors,destructors. While an object is a member of the class or an instance of the class. for ex:-
#include<iostream>
using namespace std;
class car
{
public:
string color;
int numgears;
int engine capacity_cc;
bool ispetrol;
car(string color,int numgears,int engine capacity_cc,bool ispetrol)
{
this->color=color;
this->numgears=numgears;
this->capacity_cc=capacity_cc;
this->ispetrol=ispetrol;
}
};
int main()
{
car volvo = new car("red",6,2500,false);
return 0;
}
In the example we have class car and it's object is volvo.
Final answer:
In object-oriented programming, a class is a blueprint for creating objects that share similar properties and behaviors. An object, on the other hand, is an instance or a specific occurrence of that class. It represents a real-world entity and holds the values for the attributes defined in the class.
Explanation:
In object-oriented programming, a class is a blueprint for creating objects (instances) that share similar properties and behaviors. It defines the attributes (data) and methods (functions) that objects of that class will have. A class is like a template or a cookie cutter, while an object is an instance or a specific occurrence of that class. It represents a real-world entity and holds the values for the attributes defined in the class.
Let's take a car as an example. The class for a car would define its properties, such as color, brand, and year, as well as its behaviors, such as accelerating, braking, and turning. An object of this car class would be a specific car, like a red Toyota Camry from 2020, which has its unique values for the properties defined in the class.
What is the reason of non-deterministic (indeterminate) behavior of concurrent programs?
Answer: Concurrent programs are the programs that execute at the same point of time. They are simultaneous in nature with other concurrent programs.They are executed with the help of threads to achieve the concurrency without the issue of scheduling. They are consider long running programs.
The program that has the low execution time compared with all other programs gets executed first.If the case of no progress is seen then another thread is executed.This type of execution gives the non- deterministic situation in which the possibility of leading completion of any particular program cannot be determined.
Suppose a class consists of 3 sophomores, 4 juniors, and 2 seniors (no freshmen). We want one person from each of the class years to do a presentation. How many different sets of presenters are there?
Answer:
There are 24 different sets of presenters.
Explanation:
We have:
3 sophmores
4 juniors
2 seniors
The presentation has the following format:
So - J - Sr
Since there are 3 sophmores, 4 juniors and 2 seniors, we have that:
For each sophmore, 4 juniors can present.
For each junior, 2 seniors can present
There are 3 sophmores
So there are
[tex]3*4*2 = 24[/tex]
There are 24 different sets of presenters.
A(n) ______________ is one that continually offers an improved product that customers are eager to purchase.
Select one:
a. Disruptive technology
b. Sustaining technology
c. Innovative technology
d. None of the above
Answer: b)Sustaining technology
Explanation: Sustaining technology is the technology that is used for enhancing the product than before . The improvement is made in the product to improve it's marketing and increasing it's value. In this way, the customer will tend to purchase the product .
Other options are incorrect because disruptive technology is the damaging the marketing of current product by using new marketing product, innovative technology is the technology that changing product to make it interesting.Thus, the most suitable option is option(b).
The IllegalArgumentException class extends the RuntimeException class, and is therefore:
a.) a checked exception class b.) an unchecked exception class c.) never used directly d.) None of these
Answer:
b.) an unchecked exception class
Explanation:
The IllegalArgumentException is a subclass of the RuntimeException class. As such it represents an unchecked exception. An unchecked exception is one which need not necessarily be thrown or caught within the method body. In contract, a checked exception (e.g., IOExeption ) needs to be declared in either the throws clause or needs to be handled in a try-catch block as part of the method.
Examine the class definition. How many members does it contain?
class clockType
{
public:
void setTime(int, int, int);
void getTime() const;
void printTime() const;
bool equalTime(const clockType&) const;
private:
int hr;
int min;
int sec;
};
(Points : 5) 7
3
4
None of the above
Answer:
7
Explanation:
The class clockType consists of three member variables marked as private:
int hr; int min; int sec;It also contains four public member functions:
void setTime(int, int, int); void getTime() const; void printTime() const; bool equalTime(const clockType&) const;So in total it contains seven members. The member variables constitute attributes or state of the object while the member functions represent possible operations on the object.
Which part of the cable is used to carry data?
Answer:Inner conductor of cable
Explanation: The cable used for the transmission of data maintains the communication between the devices. The layer is made up the layers like jacket layer which is the outermost layer for the protection of wiring in cable .
A shield is also present on the inner conductor of the cable for the protection of the data from interference. The inner conductor is the part which transmits the data. Various types of the metal and alloys are used for making the conductor.It is a very sensitive part so it is protected with jackets of layer.
What is the difference between frontend and backend web development?
Answer:
Front- end web development:
The front end web development is basically focused on the client side and it manage the web designing of the web browser.
It basically responsible for analyzing the code, designing and debugging various types of web applications. The front end developers basically design the architecture of the site.
The front end refers in the web development what the users actually see first in the web browser.
Back- end web development:
In back end web development the code is basically run in the server opposed the client. The back end developer are not basically understand the programming and coding language. It only deals with the outside architecture of the web applications.
It is usually divided into three parts that is:
ServerApplication DatabaseDefine and implement a method that takes a string array as a parameter and returns the length of the shortest and the longest strings in the array
Answer:
#HERE IS CODE IN PYTHON
#function to find length of shortest and longest string in the array
def fun(list2):
#find length of shortest string
mn=len(min(list2))
#find length of longest string
mx=len(max(list2))
#return both the value
return mn,mx
#array of strings
list2 = ['Ford', 'Volvo', 'BMW', 'MARUTI','TATA']
# call the function
mn,mx=fun(list2)
#print the result
print("shortest length is:",mn)
print("longest length is:",mx)
Explanation:
Create an array of strings.Call the function fun() with array as parameter. Here min() function will find the minimum string among all the strings of array and then len() function will find its length and assign to "mn". Similarly max() will find the largest string and then len() will find its length and assign to "mx". Function fun() will return "mn" & "mx".Then print the length of shortest and longest string.
Output:
shortest length is: 3
longest length is: 5
Final answer:
The problem involves writing a Java method to find the lengths of the shortest and longest strings in an array. The method iterates through each string to update and find the minimum and maximum lengths. It returns these lengths as an integer array.
Explanation:
To tackle the problem of finding the lengths of the shortest and longest strings in an array, we'll use a programming approach. Let's assume we are using Java for this solution. The method will iterate through the array, comparing the lengths of each string to find the minimum and maximum lengths.
Here is a simple Java method that accomplishes this:
public static int[] findShortestAndLongestStringLen(String[] array) {
if (array == null || array.length == 0) return new int[] {-1, -1}; // Handle empty or null array
int minLength = Integer.MAX_VALUE;
int maxLength = Integer.MIN_VALUE;
for (String str : array) {
if (str.length() < minLength) {
minLength = str.length();
}
if (str.length() > maxLength) {
maxLength = str.length();
}
}
return new int[] {minLength, maxLength};
}
This method initializes two variables, minLength and maxLength, with the maximum and minimum values an integer can have, respectively. It iterates through each string in the array, updating these values based on the length of each string. Finally, it returns an array of two integers: the shortest length found (minLength) and the longest (maxLength).
Convert (65.125)10 to octal.
Answer:
101.1
Explanation:
Keep in mind that octal has 8 numbers
Step 1: Split your number in 2 parts (integer part and decimal part):
integer part 65decimal part 0.125Step 2: Convert the decimal part. For this step you need to multiply your decimal part and 8 (8 correspond the octal base) and get the integer part until you need it:
0.125 * 8 = 1
So your decimal part correspond to number 1 in octal = (1)8
Step 3: Convert integer part: for this step you need to divide your integer part by 8 until you can and get the remainder
65 / 8 = 8 remainder 1
8 / 8 = 1 remainder 0
1 / 8 = 0 remainder 1
Step 4: join the remainders from bottom to top and get the integer part
101
Step 5: join the integer part and the decimal part to get the octal convertion
101.1
What are the advantages and disadvantages of using wireless communications? What are the advantages and disadvantages of using wired communications? Under what conditions is a wireless channel preferred over a wired channel? [Hint: use a table to compare and contrast the advantages and disadvantages of wired versus wireless communications.] Please give sources if possible
Answer:
Advantages of wireless communication:-
Flexibility in transferring the message through communication for which the sender and receiver can be in any place.Speed of the communication is accurate and fastDue to no wiring , the cost of the wireless communication is less.Disadvantages of wireless communication:-
The security is less as the data can be accessed by unauthorized sources at times.The setting up of wireless communication complex and expensive.Advantages of wired communication:-
Simple configurationHigher bandwidth is present in the cableHigh reliabilityDisadvantages of wired communication:-
Mobility is present for communicationInstallation requires lot of time due to cablingRequires extra devices for covering large areas for communicationWireless communication is more preferable than wired communication in the conditions like communication connection that should face low damage and longer life which is not present in cable connection as they break or get disrupted.The flexibility of moving while communication is required by most people so, they use wireless communication .
The advantages and disadvantages of wireless communications include portability, ease of installation, and flexibility as advantages, while they suffer from potential security issues, interference, and varying reliability. On the other hand, wired communications boast high stability, speed, and security but lack the mobility and ease of deployment that wireless offers. Wireless channels are preferred over wired when mobility, ease of setup, or physical cabling constraints are considerations.
Wireless communications offer the key advantages of mobility, ease of installation, and the ability to connect multiple devices without the need for physical cables. However, disadvantages include security concerns, as wireless communications can be more susceptible to unauthorized access, interference from other devices or physical barriers that can disrupt signals, and potentially less reliability in terms of consistent connectivity.
Wired communications, by contrast, offer greater security, as physical access to the network is required for connectivity, and are typically more stable and faster, as they are less likely to be affected by interference. The main disadvantages include the lack of mobility, as devices are tethered to specific locations by cables, and challenges in the installation process, especially in areas where running cables is difficult or impractical. Wireless channels are often preferred in situations where mobility is necessary, such as in conference rooms or public spaces, where devices are frequently moved or added, and where installing cables would be difficult or costly.
How are IP addresses usually written?
Explanation:
There are two versions of Internet Protocol(IP) present in which the IP address are written which are IPv4 and IPv6.The numbers in IPv4 are 32 bit long while in IPv6 the numbers are 128 bits long.
So let's see IPv4 addresses
IP addresses are written in human readable form.There are 4 groups of 8 bits which represent the corresponding decimal numbers.These groups are separated by (.) .Since there are 8 bits hence the numbers range is 0-255.
for ex:- 124.45.65.210
There are 3 dots the numbers are in the range of 0-255.There should be no leading zeroes present in the IP address.
How many strings of eight lower-case English letters are there that contain the two letters bg, in that order, with the further constraint that no letters can be repeated?
Answer: 678,363,840
Explanation:
Hi!
The "bg" part of the string could be in 7 possible positions within the string. If we number the characters in the string from 0 to 7, the "b" of "bg" could be in positions 0 to 6.
We need to count the possibilities for the other 6 characters. They can be any of the 26 lower-case letters, but not b nor g, because no letters can be repeated. So we can choose 6 letters from 24 letters, without repetition, and the order is important. The number of such combinations is:
[tex]n = 24,\; m = 6\\\frac{n!}{(n-m)!} = \frac{24!}{18!} = 96,909,120[/tex]
For the total number of strings, we have to multiply with the 7 possible position of "bg". Then, the final number is 678,363,840
If your database is in archivelog mode, how can you force an archive?
A. Issue an alter database switch logfile command.
B. Issue an alter system switch logfile command.
C. Issue an alter system log_archive_start command.
D. There is no command to force an archive; they happen automatically.
Answer: (B) Issue an alter system switch logfile command.
Explanation:
When the database is in the archive log mode then, the issue in the alter system switch logfile command force the particular switch. It basically produce achieve redo log which is smaller in the size by the dedicated size of the parameter log buffer.
It also govern the particular size of the RAM (Random access memory) buffer by redo log. This command is basically faster to return in the program by the use of redo log.
On the other hand, all the options are incorrect as this command only alter the system and does not alter the database. Therefore, Option (B) is correct.
What are the disadvantages of cloud computing?
Answer: Cloud computing is the service that helps the usage of the services of the computer system parts (hardware and software) over a network .The disadvantages of the cloud computing are as follows:-
Cloud hacking-there are cases of the cloud hacking which is a incident against the security of the cloud computing devices.Technical problem-there is no quick fix provision for the mending the technical issue in the cloud computing network .Restricted features:-there are limitation on the number of features that are found in the different cloud computing such as accessibility , security, space.etc.