Answer:
echo %username%
whoami
Explanation:
In windows the command used to display user name which you have logged in is echo %username%.Note that it is only for windows platform only .It works on all released windows platforms.
There is another command whoami it tells the domain name also along with the username.
You have to write all these commands on the command prompt.
Which of the following function headings arevalid? If they are invalid, explain why.
a. One(int a, intb) valid invalid
b. intThisOne(charx) valid invalid
c. char Another(int a,b) valid invalid
d. doubleYetAnother valid invalid
Answer:
a.invalid
b.invalid
c.invalid
d.invalid
Explanation:
For option a return type of the function is not specified and there is no space between int and b.
For option b there is no space between int and ThisOne and char and x.If there is space then this is valid.
For option c data type of variable b is not specified.
For option d if YetAnother function is without arguments then parenthesis should be there parenthesis are missing in this function heading.
Which algorithm makes the most efficient use ofmemory?
Answer:
Best-fit Algorithm
Explanation:
Best-fit: Allocating the smallest memory location that is greater than or equal to the size of process.
Example
Let these are the memory locations-210kb,310kb,260kb,610kb
and size of processes-160kb,450kb,250kb,300kb
For the first-fit,
We allocate 160 kb to the 210kb memory location
Then, we allocate 450 kb to the 610kb because others don't have the size.
Then,we allocate 250kb to the 310 kb.
300 kb will stop,as no memory locations can execute.
For the Best-fit,
We allocate 160 kb to the 210kb memory location
Then,we allocate 450kb to the 610kb.
Then,we allocate 250kb to the 260kb not 310kb according to best-fit.
Then we allocate 300kb to the 310kb.
For the worst fit,
We allocate 160 kb to the 610kb memory location according to the worst-fit algorithm.
Then,we can't allocate 450kb to any memory location.
Then,we allocate 250kb to the 310kb .
We can' allocate 300kb in 260kb memory location.
As we can see from this example that in First-fit algorithm 300kb process will stop as no memory location is there.
In worst-fit algorithm ,We can't allocate 450kb,300kb to any memory locations.
In Best-fit algorithm,we can allocate the process to each location,so this algorithm is using memory in a efficient way.
You can tell that the equals() method takes a ____ argument because parentheses are used in the method call.
a.
Boolean
b.
Double
c.
String
d.
Null
Answer:
c. String
Explanation:
The equals method in java String class takes an object reference as a parameter. We can compare two Strings with the help of equals method of the String class. The equals() method of the java String class compares the given strings based on the content of the string.
Use of the String equals method:-
if (stringOne> stringTwo) it will return a positive value.
if both of the strings are equal lexicographically means
(stringOne == stringTwo) it will return 0.
if (stringOne < stringTwo) it will return a negative value.
) Consider the array called myArray declared below that contains and negative integers. Write number of positive integers in the array. That is, your loop display the message "Number of positive integers is 5" a loop statement to count and display the should (4 points) int myArray[]卟1,3,-9,9,33,-4,-5, 100,4,-23); Note: The loop should always work without modification even if the values in th array are changed
Answer:
#include <iostream>
using namespace std;
int main()
{
int arr[]={3,-9,9,33,-4,-5, 100,4,-23};
int pos;
int n=sizeof(arr)/sizeof(arr[0]);
for(int i=0;i<n;i++){
if(arr[i]>=0){
pos++;
}
}
cout<<"Number of positive integers is "<<pos<<endl;
return 0;
}
Explanation:
create the main function in the c++ programming and declare the array with the element. Then, store the size of array by using the formula:
int n=sizeof(arr)/sizeof(arr[0]);
after that, take a for loop for traversing the array and then check condition for positive element using if statement,
condition is array element greater than or equal to zero.
if condition true then increment the count by 1.
this process happen until the condition true
and finally print the count.
How many characters does the "short text" have?
Answer:
Total number of characters in "short text" is 10.
Total number of distinct characters is 8.
Explanation:
List of characters in "short text":
s,h,o,r,t, ,t,e,x,t - 10
Set of distinct characters is:
s,h,o,r,t, ,e,x - 8
The length can be determined programmatically in Java using String.length() api.To determine distinct characters, individual characters can be added to a Set and then the set size can be computed.
Which of the following is NOT a valid method to increase a variable named score by 1?
a.
++score = score + 1
b.
score = score + 1
c.
score++
d.
++score
Answer:
a.
++score = score + 1
Explanation:
First you have to understand the increment operator;
There are three possible ways to increment the value of variable by 1.
1. post increment
syntax:
name++
it using in expression first then increase the value by 1.
2. Pre increment
syntax:
++name
it increase the value by 1 before it using in expression.
3. simple method
name = name +1
In the question,
option 1: ++score = score + 1
it increase the value of score by 2 because their are two increment is used first for (score + 1) and second ++score.
Therefore, the correct option is a.
In fiberoptic cable, the signal source is__________waves
1 Infrared
2 Light
3 Radio
4 Very LowFrequency
Answer: Option - 2) Light
In fiber optic cable, the signal source is light wave.
Explanation: In fiber optic cable the data transmission send information through electronic signal into light wave. When the input data is given in the form of electronic signal, then it gets converted into light signal with the help of light source. As fiber optic is a medium for carrying information in the form of light from one medium to another. Fiber optics are beneficial as it is used in long distance data transmission.
You may declare an unlimited number of variables in a statement as long as the variables are ____.
a.
initialized to the same value
b.
the same data type
c.
properly commented
d.
floating point numbers
Answer:
b. the same data type
Explanation:
Any number of variables can be declared in a statement as long as the variables have the same data type. For example:
1) int a,b,c,d,e;
Here each of the declared variables a,b,c,d,e have the type int.
2) char p,q,r,s,t,u,v,w;
In this case variables p to w all have the type char.
3) float x,y,z;
x,y and z are all of type float.
Programming: Write a recursive function to_number that forms the integer sum of all digit characters in a string. For example, the result of to_number("3ac4") would be 7. Hint: If next is a digit character ('0' through '9'), function is_digit(next) in header will return true.
yes
Explanation:
isn't really noted but if the sequence is in the given order the ("3at4") could be expressed in a ('0' to '9' )format
Write about the future of Reliability and Security in Software Engineering.
Answer:
Future of Reliability and Security in Software Engineering:
Software reliability refers to a system which is failure-free operations and it is related to many aspects of software and testing process. It is very important as it is directly affects the system reliability. Testing is a best method to measure software reliability. Software can be accessed using reliability information.
As, software reliability, security are tightly coupled with each other and software security problem becoming more severe with the development of the internet. Many software application have security measurement against malicious attacks, so the future of security testing improves the software flaws.
It is legal to have a function with no arguments. TRUE FALSE
Answer:
TRUE
Explanation:
A parameter is a variable in a method definition and an argument is the value to this variable that gets passed to the function.
public void CalculateAdd(int i, int j)
{
Console.WriteLine(i+j);
}
In the above defined function, i and j are parameters .
We pass arguments when the function is called.
CalculateAdd(10,20);
10 and 20 are arguments which are passed to the above function to calculate addition operation.
If a function has no parameters, then it is legal to have no arguments.
For example,
public void PrintMessage()
{
Console.WriteLine("Hello");
}
The above function has no parameters. So, you can call the function without passing any arguments to it as shown below.
PrintMessage();
Write an application that can hold five integers in an array. Display the integers from first to last, and then display the integers from last to first.
Answer:
Create an integer array which holds five integers
Explanation:
I have written a simple program using c# as a programming language.
Here's the program:
using System;
public class Test
{
public static void Main()
{
int[] numbers = new int[5];
Console.WriteLine("enter 5 numbers");
for (int i=0; i<=4; i++)
{
numbers[i]= Convert.ToInt32(Console.ReadLine());
}
foreach(int k in numbers)
{
Console.WriteLine(k+ "\n");
}
Console.WriteLine("----------------------------");
Console.WriteLine("In reverse");
for(int j=4; j>=0; j--)
{
Console.WriteLine(numbers[j] + "\n");
}
Console.ReadLine();
}
}
Explanation of Program:
I have created an array named "numbers" and assigned 5 as it's fixed size.
I prompted the user to enter numbers up to 5. I read those input numbers using Console.ReadLine() and converted to integers as return type of Console.ReadLine() is string. I have stored all inputs from user into an array while reading as below:
numbers[i]= Convert.ToInt32(Console.ReadLine());
Next step is to print them. We can do it easily using foreach loop where it pulls out elements from an array until it reaches end of an array and print them on console.
If I need to print them from first to last, the condition is,
for (int i=0; i<=4; i++)
as it needs to start from first element
If I need to print them from last to first, the condition is,
or(int j=4; j>=0; j--)
as it needs to start from last element
The application that can hold five integers in an array and display the integer from first to last and last to first is as follows;
integers = [15, 17, 8, 10, 6]
print(integers)
x = integers[::-1]
print(x)
Code explanation:The code is written in python.
The first line of code, we declared a variable named integers. This integers variables holds the 5 integers.The second line of code, we print the the integers from first to last.The next line of code, we reversed the array from last to first and stores it in the variable x. Then, we print the x variable to get the code from last to first.learn more on array here:https://brainly.com/question/19587167
Triggers can be created in operational systemsto keep track of recently ------------------ records.o Deletedo Updatedo Inserted
Answer:
Inserted
Explanation:
Triggers can be created in operational systems to keep track of recently inserted records.
Generally, what is the term for storage locations in a processor?
Answer: Registers
Explanation:
Registers are small storage locations identified by different types of registers. The function of the register is to provide data for immediate processing to the CPU. These registers hold data temporarily and provide easy access of data to the processor.
Something within a while loop must eventually cause the condition to become false, or a(n) __________ results.
1. null value
2. infinite loop
3. unexpected exit
4. compiler error
5. None of these
Answer: Infinite loop
Explanation:
A while loop terminates when the condition within the loop becomes false else the it will continue to loop for ever and thereby lead to memory overflow.
example : while(i<10)
{ print("hello");
}
here if value of i <10 then it will print hello, but if there is no condition it will lead to an infinite loop. example : while();
. A register in a computer has a of bits. How many unique combinations can be stored in the register?
Answer:
The number of unique combinations stored in the register totally dependent upon the number of bits the register can hold.
Explanation:
Suppose if the register is 2-bit.Then it can have (2²) 4 unique combinations of the bits and those combinations are 00,01,10,11.For a 3 bit register there are (2³) or 8 unique combinations those are 000,001,010,011,100,101,110,111.So for a n-bit register there can be 2ⁿ unique combinations there.
Describe the phases through which a program goes during its lifecycle. explain your answer with the help of diagram
Answer:
The image of the life cycle of program is attached please refer it.
1. Requirement:- When there is a problem the there is need of program.
2. Analysis:- In this phase all the requirements are collected.
3. Design:- It is an important phase in the program life cycle .The design of problem is generated.
4. Coding:- In this phase the program is coded as per the design.
5. Testing:- In this phase the testing of the program is done to make sure that the program is working properly.
6. Deployment:- In this phase the program comes into the use.
T F All static local variables are initialized to −1 by default.
Answer:
F
Explanation:
they are initialized to 0 by default.static variables are shared variables
Testing and Configuration Management
Answer:
Test management most commonly refers to the activity of managing the computer software testing process. A test management tool is software used to manage tests (automated or manual) that have been previously specified by a test procedure. It is often associated with automation software.
The Configuration Management is a process of establishing and maintaining a product’s performance, functional and physical attributes with its requirements, design, and functionalities through its life.
In Configuration Management we making sure that these items are managed carefully in entire project & product life cycle. It allows Software Tester to manage their testware and test outputs using same configuration management mechanisms.
Explain the difference between the prefix and postfix forms of the increment operator.
Answer:
The prefix form of increment operator is ++a, for the variable a.
it first increments the value of the variable and substitutes the incremented value of the variable to the expression.The postfix form of increment operator is a++, for the variable a.
it substitutes the existing value of the variable to the expression and then increments the value.Explanation:
Let a = 6.
++a + 5 = 12.
but
a++ + 5 =11.
What is Peer-to-PeerNetworking?
Answer:
Peer-to-peer networking is a distributed application where computers are get connected to each other and share resources. Peer-to-peer connection can also be an ad-hoc connection as couple of computers connected and sharing files and information with each other. The main advantages of this network is that it is less expensive and easy to set up. Wireless and wired both networks can be configured as peer-to-peer networking.
Which of the following Boolean exxpressions tests to see if x is between 2 and 15 (including 2 and 15)? A. (x <15 || x> 2) B. (2 2) && (x<= 15) D. (22)
Answer:
A. (x < 15 || x > 2)
Explanation:
The operator '||' is used for OR operation. it is used in between the conditions and give the result as Boolean (TRUE or FALSE).
There are four possible result:
First condition TRUE, second condition TRUE then result will be TRUE.
First condition TRUE, second condition FALSE then result will be TRUE.
First condition FALSE, second condition TRUE then result will be TRUE.
First condition FALSE, second condition FALSE then result will be FALSE.
In the question:
Option A: (x < 15 || x > 2)
x will be in between the 2 and 15, if it less than 15 and greater than 2. So, the expression follow the condition.
Option B: (2 2) && (x<=15)
it not the correct way to write the condition, (2 2) is not allowed.
Option D: (22)
it also not true. it show the value 22.
Therefore, the correct option is A.
What width would you choose for the pdf?
Answer:
I would go for a width of 8.27 inches
Explanation:
The width of your PDF file depends on the project you are working on as well as your use case. Putting that aside, you are always better off making the dimensions of your PDF the same as the dimensions of A4 printing paper, which is 8.27 inches or 21 centimeters (2480 pixels). This is because A4 is the most common printing paper used and will make organization and printing less of a hassle.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
Write a C++ programme that asks the user to enter his age in days.Calculate then his age in:
Years – Months –Days
1 year = 365 days
1 year = 12 months
1 month = 30 days
C++ program that asks the user to enter his age in days
#include <iostream>
using namespace std;
void Findage() //Defining function
{
int a=0,d=0, m=0, y=0, r=0;
cout<<"Enter Age in Days= "; //Taking input
cin>>a;
if(a>365) //If age is greater than 365
{
y=(a)/365;
r=a%365;
if(r>30)
{
m=r/30;
d=r%30;
}
else
{
d=r%30;
}
}
else //if the age is less than 365
{
if(a>30)
{
m=(a)/30;
d=a%30;
}
else
{
d=a;
}
}if(a==365) //Printing output
{ cout<<"Your Age in Calender"<<endl;
cout<<"Year = 1"<<endl;
}
else
{
cout<<"Your Age in Calender"<<endl;
cout<<"Years= "<<y<<" Month="<<m<<" Days= "<<d<<endl;
}
}
int main()
{
Findage(); //Calling function
return 0;
}
Output
Enter Age in Days= 3697
Your Age in Calender
Years= 10 Month=1 Days= 17
A C++ program can be written to calculate a user's age in years, months, and days by dividing the total number of days provided by the user by 365 to find years and then dividing the remainder by 30 to calculate months, with the final remainder indicating the days.
A C++ program that calculates a user's age in years, months, and days from the age in days can be composed using simple arithmetic operations. Given that 1 year is 365 days, 1 year is 12 months, and 1 month is 30 days, the following process can be followed:
Ask the user for their age in days.
Use the remainder of the previous division to calculate the number of months by dividing by 30.
The remainder of the last division will give the number of days.
The resulting calculations will give the user's age in years, months, and days.
What application of encryption verifies that a document was sent by the person it says it is from? Select one: a. Digital rights management b. Asymmetric encryption c. Cryptographic hash d. Digital signatures
Answer:
D.
Explanation:
a. is about delivering material only to who is entitled to it
b. is about encrypting and decrypting with two different keys
c. is about proving the integrity of a document (that it hasn't been changed).
d. is a cryptographic hash in combination with private key, so that provides both document integrity and non-repudiation
__________ is a growing practice in cooperative farmingassociations to pool and sell the fruit as a common commodity underthe brands of the association rather than to sell the fruit of eachgrower separately.
There
One
It, which
Why
Answer:
There
Explanation:
Great question, it is always good to ask away and get rid of any doubts that you may be having.
The Correct and only answer for the sentence given in the question is "There". From the four answers given, "There" is the only answer that makes factual and grammatical sense in the sentence displayed. Therefore it is the correct answer.
** "One" could work if you took out the "is" after it, otherwise it will just be grammatically incorrect. **
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
What are the two categories of problems that we can simply convert
to parallel code?
Write an if statement that prints the message “Application accepted” if the variable workExperience is greater than or equal to 2 or the variable hasCollegeDegree is true.
Answer:
if workExperience>=2 or hasCollegeDegree==True:
print("Application accepted")
Explanation:
In the first line of code, we wrote an if statement that allows us to print a message if and only if the int variable workExperience is greater than 2 or the bool variable workExperience is TrueIn the second line of code, we print the message Application accepted if the if-statement evaluated to TrueNote: This code was written in python but you can extend the same concept to any programing language using if, comparison operation, boolean operators and print function.
A ____ report is a type of detail report in which a control break causes specific actions, such as printing subtotals for a group of records.
Answer
control break
stratified
subgroup
character
Answer: Control Break
what is java applets?and can we used java applets in web site??
Answer: Java applets is the program written in java language that run in web application. Yes, we can use java applets in web sites.
Explanation: Java applets are the minor java language program that runs with the help of internet for the web applications having compatibility to work with java .These programs usually run in web browser for the execution and it is the client side applet. It is used because it serve the purpose of having approachable and interactive features .It is possible to use it in web sites .
Answer: Java applets is the program written in java language that run in web application. Yes, we can use java applets in web sites.
Explanation: Java applets are the minor java language program that runs with the help of internet for the web applications having compatibility to work with java .These programs usually run in web browser for the execution and it is the client side applet. It is used because it serve the purpose of having approachable and interactive features .It is possible to use it in web sites .