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 following code snippet?
#include<stdio.h>
main()
{
short unsigned int i = 0;
printf("%u\n", i--);
}
Answer : A
Explanation
0, with post decrement operator value of the variable will be considered as the expression’s value and later gets decremented.
Q 2 - What is the output of the following program?
#include<stdio.h>
main()
{
int r, x = 2;
float y = 5;
r = y%x;
printf("%d", r);
}
Answer : D
Explanation
Compile Error, It is invalid that either of the operands for the modulus operator (%) is a real number.
Answer : B
Explanation
volatile is the reserved keyword and cannot be used an identifier name.
Q 4 - Choose the invalid predefined macro as per ANSI C.
Answer : D
Explanation
There is no macro define with the name __C++__, but __cplusplus is defined by ANSI)
Q 5 - What is the output of the following program?
#include<stdio.h>
main()
{
char s1[50], s2[50] = "Hello";
s1 = s2;
printf("%s", s1);
}
Answer : C
Explanation
‘s1’ refers to base address and is constant. Hence raising to ‘lvalue’ required compile time error.
Q 6 - How to round-off a value “5.77” to 6.0?
Answer : A
Explanation
ceil( ) function in C returns nearest integer value which is greater than or equal to the argument passed to thefunction.
#include <math.h>
#include <stdio.h>
int main()
{
float x=5.77;
printf("ceil of %f is %f\n", x, ceil(x));
return 0;
}
Q 7 - For a structure, if a variable behave as a pointer then from the given below operators which operator can be used to access data of the structure via the variable pointer?
Answer : C
Explanation
For a structure, Dot(.) operator can be used to access the data using normal structure variable and arrow (->)can be used to access the data using pointer variable.
Q 8 - Which library function can convert an unsigned long to a string?
Answer : B
Explanation
ultoa() - Convert an unsigned long integer into a string.
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 - extern int fun(); - The declaration indicates the presence of a global function defined outside the current module or in another file.
Answer : A
Explanation
Extern is used to resolve the scope of global identifier.
