Answer:
last
Explanation:
When a column is added to a table, it gets appended at the end of the table. For example, suppose we have a table called Student with a column 'Name'. Now suppose we want to add another column called class to the table, then the new column will be added at the end of the table. So the new table structure will consist of <Name,Class>.The same procedure will apply for any other added column.
Answer:
The correct answer for the given question is "last ".
Explanation:
When we add a column into the table so the column will add in the last of the table .We can use alter command in SQL to added the column in the table.
The syntax for adding new column into the table is given below .
ALTER TABLE table_name
ADD column_name datatype;
For example
Suppose we have to add the address column into the student table.
ALTER TABLE student
ADD address varchar (50);
This query will add the column in last of the table .
A ____ is any manipulation of data, usually with the goal of producing information.
decision
process
problem
system
Answer: Process
Explanation: Processing data in the computing field is referred as the manipulation and transformation of data into useful output. The raw data is transformed machine language data.The processing also consist of the operations performed on data.
Other options are incorrect because decision is the final judgement made regarding computing,problem is issue in system and system is the complete unit in which processing takes place.Thus, the correct option is process.
If the variable letter has been defined as a char variable, which of the following are not valid assignment statements to assign letter w to the variable?
A) letter = w;
B) letter = 'w';
C) letter = "w";
Answer:
The correct answer for the given question is option(A) and option(C) .
Explanation:
To declared any variable of character we using following syntax
char variable=' value';
char letter='w';
In option(A) their is no single quotes between character w .So this is not a valid assignment.
In option(C) their is double quotes between character w,no single quotes between character w .So this is not a valid assignment.
In option(B) their is single quotes between character w .So this is a valid assignment.
So option(A) and option(C) are are not valid assignment statement.
A) Valid if `w` is a `char` variable.
B) Valid (`'w'` is a `char` literal).
C) Invalid (`"w"` is a `String`, not a `char` literal).
In Java, a `char` variable can only be assigned a single character enclosed in single quotes (e.g., `'a'`, `'b'`, `'w'`). Therefore, valid assignment statements must adhere to this rule.
Let's analyze each option:
A) `letter = w;`
- This statement assumes `w` is a variable holding a `char` value. If `w` is not declared as a `char` and does not represent a valid character literal, this assignment will cause a compilation error.
B) `letter = 'w';`
- This is a valid assignment statement. `'w'` is a character literal representing the character 'w'. It matches the type `char`.
C) `letter = "w";`
- This statement uses double quotes, which in Java denote a `String` literal, not a `char` literal. Therefore, this assignment will cause a compilation error because you cannot directly assign a `String` to a `char` variable.
Conclusion:
The assignment statement that is not valid to assign the letter 'w' to a `char` variable in Java is **C) `letter = "w";`**.
Write a paragraph on the orgin or development of ONE of the following elementss of the Internet:
a.) Usenet
b.) Listserv or mailing list
c.) BITNET
d.) IRC
e.) HYPERTEXT
f.) any computer hardware or device used to acces the Internet
Answer:
(C) BITNET :
BITNET is basically established in united state (US) in the 1981 and used in the cooperative world as wide area computer networking. The term BITNET is originally known as because it is time network.
It is also known as forward type of the networking and the BITNET can easily transfer the data of email and files from one network server to another server. The BITNET typically uses the RSCS protocol for the purpose of networking job and it is also use in the internal IBM, which is known as Virtual network (VNET).
The BITNET is basically developed by the city university of the new York. It is used in the mainframe operating system for implementation the virtual memory system (VMS).
Subtract the following the Hex numbers:
67h
2Ah
Result is =
Answer:
3D ( in hexadecimal )
Explanation:
Converting the given hexadecimal numbers to decimal:
67 (HEX) = 16*6 + 7 = 103 (Decimal)
2A (HEX) = 2*16 + 10 = 42 (Decimal)
Subtracting the two numbers: 103 - 42 = 61 (Decimal)
Converting the result to Hexadecimal format:
61 = 16* 3 + 13
13 corresponds to D in hexadecimal.
So result in hex is 3D.
To summarize, the subtraction result for the two given hexadecimal numbers is 61 in decimal format or 3D in hexadecimal.
A level breach of security could be expected to have a severe or catastrophic adverse effect on organizational operations, organizational assets, or individuals. А.low B. normal C, moderate D. high
Answer:
Option D is correct.
Explanation:
A high-level safety violation could be anticipated to have a serious or disastrous negative impact on organisational activities, organisational assets.
The effect of the violation on an organisation may be staggering, and sometimes unknown until the outcomes are achieved. It is strange that, owing to harmful or neglectful acts, the greatest incidents of compromise come from within the business ; it requires time for an organisation to recover.
A high-level security breach might have a serious or catastrophic impact on an employee's performance, assets, or people.
High-level security breach:The impact of a violation on such an organization may be enormous, and the consequences are often unclear until they are realized.
It's odd that the majority of incidences of breach occur within the company as a result of damaging or negligent behavior; it takes time for an organization to recover.
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Which of these is most closely associated with system control? (1 point) (Points : 1.5) boundary
environment
feedback
interface
Answer:C) Feedback
Explanation: System control is the controlling and managing activity of the system by commands ,regulations, management practices etc.It helps in the analyzation of the system and improving the ability of performing the tasks.Feedback is the component of the control system that is obtained as the output after the controlling technique is applied in the system.
Other options are incorrect because environment is the surrounding of the system ,interface is the connection between the components of the system and boundary is not a technical term of control system.Thus, the correct option is option(C).
. Dеclarе a onе-dimеnsional array of 30 doublеs (on thе stack) namеd rainfall
Answer:
double rainfall[30];
Explanation:
Here we are declared an onе dimеnsional array named " rainfall " of size 30 and type double.To declared a onе dimеnsional array we can use the following syntax.
datatype array-name[size];
So double rainfall[30];
Following are the program in c++
#include<iostream> // header file
using namespace std; // namespace
int main() // main method
{
double rainfall[30]={45.5,78.9,67.78}; // array declaration and storing values
for(int i=0;i<3;++i) // iterating loop
{
cout<<rainfall[i]<<endl; // printing the array elements
}
return 0;
}
Output:
45.5
78.9
67.78
Write a small program basic c++, that defines a negative integer (between ‐1 and ‐255), converts it to a positive value and then displays it on the console window.
Answer:
#include <iostream>
using namespace std;
int main() {
int a=-156;//negative integer between -1 and -255.
a*=-1;//multiplying a to -1 so that it can become positive.
cout<<a;//printing a.
return 0;
}
Explanation:
The above written program is in C++ and in the program an integer a is defined with a negative value in the program it is -156.Then to convert it to positive integer we have to multiply a to -1 after that printing the value of a on the screen.
Write a Scheme function called "sum" which takes an input function func and a nonnegative number n and outputs the value
func(1) + func(2) + .. + func(n)
Answer:
function sum(number) {
if (number == 1) {
return 1;
}
return number + sum(number -1);
}
Explanation:
This is a recursive function, it means that is a function that calls itself for example: if you call the function with sum(5) the process is :
sum(5)
|______ 5 + sum(4)
|_______ 4 + sum(3)
|______ 3 + sum(2)
|_____2 + sum(1)
|_____ 1
the result is 1+2+3+4+5 = 15
Wireshark is an example of what type of utility? A) Packet sniffer B) Port scanner C) Vulnerability scanner D) Content filter
Answer:A) Packer sniffer
Explanation: Wireshark is analyzer of packet which are open sourced.It helps in providing the services like troubleshooting, development analysis etc with the help of sniffing activity.The sniffing of the packet that a user owns is the technique for analyzing.
Other options are incorrect because port scanner provides data regarding the technique for network connection,vulnerability scanner scan the vulnerability of the network and content filter is used for filtering the excess web pages.Thus, the correct option is option(A).
Final answer:
Wireshark is a Packet sniffer used for capturing and analyzing network traffic in a readable format, making it different from port scanners, vulnerability scanners, or content filters.
Explanation:
Wireshark is an example of a Packet sniffer. Packet sniffers are tools used for network troubleshooting, analysis, software and protocol development, and education. Wireshark, specifically, captures packets in real-time and display them in human-readable format. It allows users to see the details of the packets being transmitted over the network, giving an in-depth understanding of the network traffic. This utility is not designed to scan ports, detect vulnerabilities, or filter content, which distinguishes it from options B, C, and D respectively.
Write a program that allows the user to enter a time in seconds and then outputs how far an object would drop if it is in free fall for that length of time. Assume that the object starts at rest, there is no friction or resistance from air, and there is a constant acceleration of 32 feet per second due to gravity. Use the equation: distance = acceleration x time-squared divided by 2
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.
.What are signals, how can they be used?
Answer:
The signal is the function which that carry information about the particular phenomenon in the signal processing. A signal is also define as the change in the quantity which is observable.
In terms of telecommunication, a signal is the varying current, voltage and the electromagnetic wave which basically carries data or information. Signal can be in the form of audio, image and radar related.
A signal can be used be various signal processing system and telecommunication fr the transmission of information from one device to another device.
What is the difference between congestion control and flow control? Where are each managed in TCP?
Answer: The differences between the flow control and congestion control are as follows:-
Flow control's traffic is controlled in the direction from sender to receiver whereas traffic control in congestion control be handles from the entrance of the network.Sender is reason for the traffic in flow control while transport layer creates the traffic in congestion control.Transport layer and data link layer are used for managing the traffic whereas congestion control has transport and network layer for handling the traffic.The TCP for the congestion control works as elimination of the congestion in the sender's field in network layer and transport layer.Flow control is used in TCP to make surety about the non-overwhelming nature of sender towards receiver in the transport layer and data link layer.
Rachel needs to include a new organizational chart in her project. Which type of illustration should she use?: *
a. ClipArt
b. Picture
c. SmartArt Graphic
d. WordArt
Answer:
Option C
Explanation:
The type of illustration used by Rachael to add a new organizational chart is SmartArt Graphic.
In this tool, the information or data or ideas a person uses in the project are represented visually.
The different layout choices like organizational charts, etc enables a person to select the one that fits the information provided in the project.
Some are design to convey particular form of messages or information while the others are used for simple purposes like highlighting the appearance of texts or bullets.
Program 1: I’m buyin’ a Ferrari! If you’ve ever travelled to another country, you know that working with different currencies takes a while to get used to. As of the date of making this assignment, there are 9,240.00 Guinean Francs to $1 USD. For this program, design (pseudocode) and implement (source code) a program that prompts the user for the amount of U.S. currency they have, and converts it into Ginean Francs.
Answer:
// here is code in c++.
#include <bits/stdc++.h>
using namespace std;
int main()
{
// initialize one Guinean_Francs
double Guinean_Francs=9240.00;
int u_s_d;
double tot_Guinean_Francs;
cout<<"enter the amount in U.S dollar:";
// read the dollar
cin>>u_s_d;
// conver it into Guinean_Francs
tot_Guinean_Francs=u_s_d*Guinean_Francs;
print the output
cout<<"total Guinean Francs is :"<<tot_Guinean_Francs<<endl;
return 0;
}
Explanation:
Declare and initialize a variable "Guinean_Francs" with 9240.00.Then read the U S dollar from user and assign it to variable "u_s_d".Then multiply u_s_d with Guinean_Francs and assign it to tot_Guinean_Francs. This will be the total Guinean Francs.
Output:
enter the amount in U.S dollar:25
total Guinean Francs is :231000
The SORT statement is used in the ____________ to place records in a sort work file.
(Points : 2) IDENTIFICATION DIVISION
ENVIRONMENT DIVISION
DATA DIVISION
PROCEDURE DIVISION
Answer: Procedure division
Explanation:
The SORT statement is basically used in the procedure division for placing the various records in the sort file. The SORT statement easily accept the records from the different files and then sorting them accordingly to the specific file key in the database.
The SORT statements are used in the procedure division but it does not used in the declarative portion in the sorting file. The SORT statement is basically coded in the form of independent and fixed segment.
Create a program that will automatically add the fees and sales tax to a new car.Create a program to find the subtotal andd then total including sales tax. The program should receive a keyboard input representing the vale of the price of the car and the fees as well as the sales tax for the city the car is purchased in. San Francisco, Eurica, Concord California.
Answer:
// here is code in C++.
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// variables
double price,fee,tax;
double total;
cout<<"enter the price of car:";
// read the price of car
cin>>price;
cout<<"enter the fee:";
// read the fee
cin>>fee;
cout<<"enter the tax (in %):";
// read the tax
cin>>tax;
a
// total cost
total=price+fee+(price*tax)/100;
// print the cost
cout<<"total cost is: "<<total<<endl;
return 0;
}
Explanation:
Read the price of the car from user and assign it to variable "price",read fee and assign it to variable "fee" and tax to variable "tax".Then calculate the total cost of the car by adding the fee and tax of car to the price of car.
Output:
enter the price of car:1000
enter the fee:50
enter the tax (in %):10
total cost is: 1150
A confidential number used as an authentication factor to verify a user’s identity is called a:
a,PIN
b.User ID
c.Password
d.Challenge
Answer: (A) PIN
Explanation:
PIN is the personal identification number which is basically used to verify the identity of the users. It is confidential number which is used as the authenticating factor.
The PIN is the combination of the number that is also use to authenticate the banking system with the users.
On the other hand, the other given options are incorrect because these are not used to identify the users identification process.
Therefore, Option (A) is correct.
What is meant by ""responsive design""?
Answer:
Supported by all devices,screen sizes and orientation.
Explanation:
Responsive design mostly used in Web designs.It is the approach in which the design of the web app must respond to behavior of user and the environment also based on the platform,screen size and orientation.
This should be done by using flexible grids,layouts and some smart use of CSS .
You can also use Bootstrap for responsive designs.
A type of security control that takes measures to help restore a system is referred to as:
A.
preventative
B.
detective
C.
corrective
D.
all of the above
Answer:
C. corrective
Explanation:
Security controls
These are actions or measures taken to maintain and/ or restore the security of the system. Security controls are categorized as corrective, preventive and detective, which are discussed below.
Corrective
Security controls which help in taking the corrective steps after the malicious activity has done damage to the system or restoring the security of the system are called corrective security controls.
These controls also act as preventive measures for future risks.
These controls perform the healing and have remedial action for the damage done to the system.
Once the system has been recovered, appropriate measures are put in place to avoid further damage.
The damage can be done to the computer system, its hardware and software resources or the data.
Examples include restoring the database from the backup file.
Updating or renewing antivirus software rectifies the security against virus.
For example, once the database has been restored, access control, antivirus and other measures are employed to prevent the database from being corrupted and to prevent system from being affected.
Preventive
Security controls which help in stopping the malicious activity from harming the system are called preventive security controls.
As per the name, these measures are employed to prevent any security breach.
These measures prevent any suspicious activity from taking place which may cause harm to the system.
Firewalls prevent unauthorized access.
Antivirus prevents malicious applications from running.
Login feature to give access only to authorized user.
Detective
Security controls which help in detecting the malicious activities and alerting the security personnel are called detective security controls.
As per the name, these measures are used to identify any suspicious activity and report them. Detective controls do not prevent or correct any security breach.
Alarms are employed to detect and alert any suspicious activity.
Intrusion detection system (IDS).
In an ideal situation, security controls are a combination of all the types mentioned above.
The type of security control involving measures that restore a system is referred to as: c. corrective.
What is Corrective Security Control?A corrective security control can be defined as the type of security control measures that includes technical, administrative and physical measures which are initiated to help restore a system to its original state after a breach or an unauthorized activity has occurred.
Therefore, the type of security control involving measures that restore a system is referred to as: c. corrective.
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A computer’s memory is composed of 8K words of 32 bits each. How many bits are required for memory addressing if the smallest addressable memory unit is a word?
13
8
10
6
32
Answer:
The minimum number of bits necessary to address 8K words is 13.
Explanation:
You have the number of words to address that is 8000 words, a word is the smallest addressable memory unit.
8000 words can be addressed with [tex]2^{n}[/tex] units. Now you have to find the value of n that approximates to the number of words.
[tex]2^2=4\\2^4=16\\2^7=128\\2^{10}=1024\\2^{12}=4096\\2^{13}=8192[/tex]
So you can see that 13 bits are needed to address 8K words.
______The statement #include < math.h > defines the name of the current program you are writing as "math". (T/F)
Answer:
False.
Explanation:
The statement #include<math.h> means it is telling the compiler to include the the C language library math.h. It contains different math mathematical functions such as pow,ceil,floor,log,log10 etc.
#include is a preprocessor directive and it is used to paste the code the file that is provided in the #include to the current file.
Answer:
The statement #include<math.h> means it is telling the compiler to include the the C language library math.h. It contains different math mathematical functions such as pow,ceil,floor,log,log10 etc.
#include is a preprocessor directive and it is used to paste the code the file that is provided in the #include to the current file.
Explanation:
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Create a single line comment that says ""Print results to screen""
Answer:
//""Print results to screen""
Explanation:
In c,c++,java,javascript // is used for the single line comment.
syntax:- // comment.
Whatever text that is followed after // is commented means this line will not get executed by the compiler.
Comments are used to explain the code to other person who is working on the code or trying to understand that code.
What are some steps in object-oriented design process? Explain with examples.
Answer:
The following are some steps for the object oriented designing process that are:
First, define the proper modes and the context use in the system. Then, design the process of the object oriented system architecture and define its main feature by using the architecture.Identify the given object from the object oriented system for construction of the model of the system.Then, finally specify the object interface in the system.For example:
For implementing the flow of pipe, Firstly break the transformation into the different level of stages and then define the output and input properly between the pair of the stages. Then, differentiate the operation of each stage of the updates pipeline.
What is a URN (include example)
Answer: URN(Uniform Resource Name) is the basically a subset of the Uniform Resource identifier(URL). It uses "urn"scheme for the working an implementation. Uniform resource name functions by identifying components uniquely through their name.
The most common example of URN is ISBN (International Standard Book Number)number which helps in the unique searching and identification of book.
Summarize who you believe cyber criminals are, and why?
Answer:
The cyber criminals are the people that are engaged with getting the data in an unapproved way and furthermore mischief to the association henceforth are considered as cyber criminals.
Cyber criminals are people or groups of individuals who use innovation to committed the malicious exercises on computerized frameworks or systems with the aim of taking the organization data or individual information and producing benefit.
There are many types of cyber criminals that are:
Internet stalkersCyber terrorist Identity thieves
What are the two possible stereotypes allowed for package: (Points : 6) framework and private
modelLibrary and protected
framework and modelLibrary
framework and protected
Answer: framework and modelLibrary
Explanation: Stereotypes helps in the providing the control action to the class that is providing support to the other class in the UML(Unified modeling language) model. For the package as the model element the stereotypes allowed are framework and modelLibrary.
framework stereotype applied on the package for providing due to reusable components it persist. modelLibrary is the stereotype for the package that has reusable model elements.
Other options are incorrect because "private" and "protected" are not the stereotypes for the model element package.Thus the correct option is framework and modelLibrary.
Using for loop . Input an integer and identify whether it's EVEN OR ODD ( without using modulo operator )
using only . C++ programming
Answer:
Following are the program in c++ language
#include<iostream> // header file
using namespace std; // namespace
int main()
{
int n1,i; // variable declaration
cout<<"Enter Number: ";
cin>>n1; // input number
for(i=n1;i>1;i=i-2) // check the condition
{
n1 = n1-2; // decrement the value of number by -2
}
if(n1==0) // check if it is 0
cout<<"number is EVEN"<<"\n"; // print even
else
cout<<"number is ODD"<<"\n"; // print odd
return 0;
}
Output:
Enter Number: 45
number is ODD
Again run the program
Enter Number:10
number is EVEN
Explanation:
In this program, we input the number by a user in variable n1. After that, we iterate the for loop and initialize the value of a variable" i" in for loop and check the condition.
In each iteration, the variable n1 is decrement by 2 and store it n1.
Finally, check if n1==0 then it print number is EVEN otherwise it print number is ODD.
Write c++ function that receives input a person’s first name and surname, and then just displays the initials. For example: John Peter Joe, the initials JPJ must be displayed
Answer:
void Initials(string firstName,string lastName)
{
cout<<firstName[0];
for(int i=1;i<firstName.length();i++)
{
if(firstName[i-1]==' ')
{
cout<<firstName[i];
}
}
cout<<lastName[0];
for(int i=1;i<lastName.length();i++)
{
if(lastName[i-1]==' ')
{
cout<<lastName[i];
}
}
cout<<endl;
}
Explanation:
The above written code is the function Initials which prints the full name.Parameters provided in the function are firstname and lastname in the format of string.You should include string header file for this code to run.
A common measure of transmission for digital data is the number of bits transmitted per second. Generally, transmission is accomplished in packets consisting of a start bit, a byte (8 bits) of information, and a stop bit. Using these facts, answer the following:
a. Compute the time required to transmit an image of 1200x800 pixels with 8 bits for gray of each pixel using a 50 M bits/sec. modem?
b.What would the time be at 3 M bits/sec, a representative of download speed of a DSL connection?
(c) Repeat a and b when the image is RGB colored with 8 bits for each primary color. f 20 colored frames per second
Answer: a) 0,19 seg. b) 3,2 seg. c) 11,5 seg. d) 192 seg.
Explanation:
a) For each pixel in the image, we use 8 bits + 1 start bit + 1 stop bit= 10 bits.
Number of Pixels: 800*1200= 960,000.Bits transmitted: 960,000 x 10 = 9.6 * 10⁶ bits = 9.6 Mbitsif the modem is able to transmit up to 50 Mbits in a second, we can calculate how much time it will be needed to transmit 9.6 Mbits, using this equality:50 Mbit = 1 sec9.6 Mbit = x ⇒ t= 9.6 / 50 = 0.19 secb) If the modem speed changes to 3 Mb/s, all we need to do is just use the same equality, as follows:
3 Mbit = 1 sec9.6 Mbit = x ⇒ t= 9.6 / 3 = 3.2 secc) Now, if we need to transmit a colored image , at a rate of 20 f/sec, we need to calculate first how many bits we need to transmit, as follows:
1 Frame= 800*1200* (24 bits + 3 start bits + 3 stop bits)= 28.8 Mbits1 Second= 20 frames/ sec = 28.8 Mbits *20 = 576 Mbits.If the modem speed is 50 Mb/s, we can use the same formula that we used for a) and b), as follows: 50 Mbit = 1 sec576 Mbits = x ⇒ t= 576 / 50 = 11.5 secd) Same as c) replacing 50 Mb/s by 3 Mb/s, as follows:
3 Mbit = 1 sec576 Mbits = x ⇒ t= 576 / 3 = 192 sec
The time that's required to transmit an image of 1200x800 pixels with 8 bits for gray is 151.6 million seconds.
How to calculate the time taken?The time required to transmit an image of 1200x800 pixels with 8 bits for gray will be:
= (1200 × 800 × 8) / 50
= 151.6 million seconds.
The time needed to be at 3 M bits/sec, a representative of download speed of a DSL connection will be:
= 7.68/3
= 2.56 seconds.
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