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- Operators in C
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- C - Decision Making
- C - if Statement
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- Loops in C
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- Functions in C
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- Pointers in C
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- User-Defined Data Types
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- Memory Management in C
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C Programming - Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to C Programming Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - What is the output of the below code snippet?
#include<stdio.h>
main()
{
for(1;2;3)
printf("Hello");
}
Answer : A
Explanation
infinite loop, as the second expression is non-0, hence the condition is always true.
Q 2 - What is the output of the following program?
#include<stdio.h>
main()
{
printf("\");
}
Answer : D
Explanation
Compile error, Format string of printf is not terminated.
Q 3 - First operating system designed using C programming language.
Answer : C
Explanation
UNIX. C actually invented to write an operation system called UNIX. By 1973 the entire UNIX OS is designed using C.
Q 4 - What is the output of the following program?
#include<stdio.h>
main()
{
}
Answer : A
Explanation
It is valid to have main() function empty, therefore producing no displayable output.
Q 5 - What is the output of the following program?
#include<stdio.h>
main()
{
char *s = "Abc";
while(*s)
printf("%c", *s++);
}
Answer : A
Explanation
Loop continues until *s not equal to \0, hence printing Abc where character is fetched first and address is incremented later.
Answer : A
Explanation
#include <stdio.h>
int main()
{
longintdecimalNumber,remainder,quotient;
intbinaryNumber[100], i = 1, j;
printf("Enter any decimal number: ");
scanf("%ld",&decimalNumber);
quotient = decimalNumber;
while(quotient!=0){
binaryNumber[i++]= quotient % 2;
quotient = quotient / 2;
}
printf("Equivalent binary value of decimal number %d: ",decimalNumber);
for(j = i -1 ;j> 0;j--)
printf("%d",binaryNumber[j]);
return0;
}
Q 7 - The equivalent pointer expression by using the array elementa[i][j][k][2],
Answer : B
Explanation
If, the array elementis a[i][j] = *(*(a+i)+j)
If, the array elementis a[i][j][k]= *(*(*(a+i)+j)+k)
Q 8 - How many times the given below program will print "IndiaPIN"?
#include<stdio.h>
int main ()
{
printf("IndiaPIN");
main();
return 0;
}
Answer : D
Explanation
Astack over flowcomes when over loaded memory is used by the call stack. Here, main()functionis called repeatedly and its return address stores in the stack. When stack memory get filled, it displays the error stack overflow.
#include<stdio.h>
int main ()
{
printf("IndiaPIN");
main();
return 0;
}
Q 9 - What will be the output of the following program?
#include<stdio.h>
int main()
{
const int x = 5;
const int *ptrx;
ptrx = &x;
*ptrx = 10;
printf("%d\n", x);
return 0;
}
Answer : D
Explanation
The above program will return error
#include<stdio.h>
int main()
{
const int x = 5;
const int *ptrx;
ptrx = &x;
*ptrx = 10;
printf("%d\n", x);
return 0;
}
Q 10 - The maximum combined length of the command-line arguments as well as the spaces between adjacent arguments is a) 120 characters, b) 56 characters, c) Vary from one OS to another
Answer : D
Explanation
The maximum combined length of the command-line arguments and the spaces between adjacent arguments vary from one OS to another.