1. What is the output of following program?
#include <stdio.h> int main() { int a = 1, b = 2, c = 3; c = a == b; printf("%d", c); return 0; } |
Choose the correct answer:
(A) 0
(B) 1
(C) 2
(D) 3
Answer : (A)
Explanation :
“==” is relational operator which returns only two values, either 0 or 1.
0: If a == b is false
1: If a == b is true
Since
a=1
b=2
So, a == b is false hence C = 0.
2. What is the output of following program?
#include <stdio.h> int main() { int a = 20; ; ; printf("%d", a); ; return 0; } |
Choose the correct answer:
(A) 20
(B) Error
(C) ;20;
(D) ;20
Answer : (A)
Explanation : ; (statement terminator) and no expression/statement is available here, so this is a null statement has no side effect, hence no error is occurred.
3. What is the output of following program?
#include <stdio.h> int main() { int a = 15; float b = 1.234; printf("%*f", a, b); return 0; } |
Choose the correct answer:
(A) 1.234
(B) 1.234000
(C) Compilation Error
(D) Runtime error
Answer : (B)
Explanation : You can define width formatting at run time using %*, This is known as Indirect width precision. printf(“%*f”, a, b); is considered as “%15f”, hence value of b is printed with left padding by 15.
4. What is the output of following program?
#include <stdio.h> void main() { int a = 1, b = 2, c = 3; char d = 0; if (a, b, c, d) { printf("EXAM"); } } |
Choose the correct answer:
(A) No Output and No Error
(B) EXAM
(C) Run time error
(D) Compile time error
Answer : (A)
Explanation :Print statement will not execute because ‘ if ‘condition return false. Value of variable d is 0.
5. What is the output of following program?
#include <stdio.h> void main() { int a = 25; printf("%o %x", a, a); getch(); } |
Choose the correct answer:
(A) 25 25
(B) 025 0x25
(C) 12 42
(D) 31 19
(E) None of these
Answer : (D)
Explanation :
%o is used to print the number in octal number format.
%x is used to print the number in hexadecimal number format.
Note: In c octal number starts with 0 and hexadecimal number starts with 0x.
