1. What will be the output of the following C code?
#include <stdio.h>
void main()
int a = 3;
int b = ++a + a++ + --a;
printf("Value of b is %d", b);
a) Value of x is 12
b) Value of x is 13
c) Value of x is 10
d) Undefined behaviour/Compiler dependent
Answer: d
2. What is the precedence of arithmetic operators (from highest to lowest)?
a) %, *, /, +, –
b) %, +, /, *, –
c) +, -, %, *, /
d) %, +, -, *, /
Answer: a
3. Which of the following is not an arithmetic operation?
a) a * = 10;
b) a / = 10;
c) a ! = 10;
d) a % = 10;
Answer: c
4. Which of the following data type will throw an error on modulus operation(%)?
a) char
b) short
c) int
d) float
Answer: d
5. What will be the output of the following C code?
#include <stdio.h>
int main()
int a = 10;
double b = 5.6;
int c;
c = a + b;
printf("%d", c);
a) 15
b) 16
c) 15.6
d) 10
Answer: a
6. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int a = 10, b = 5, c = 5;
int d;
d = a == (b + c);
printf("%d", d);
a) Syntax error
b) 1
c) 10
d) 5
Answer: b
7. What will be the output of the following C code?
#include <stdio.h>
int main()
int i = 3;
int l = i / -2;
int k = i % -2;
printf("%d %d\n", l, k);
return 0;
a) Compile time error
b) -1 1
c) 1 -1
d) Implementation defined
Answer: b
8. What will be the output of the following C code?
#include <stdio.h>
int main()
int i = 5;
i = i / 3;
printf("%d\n", i);
return 0;
a) Implementation defined
b) 1
c) 3
d) Compile time error
Answer: b
9. What will be the output of the following C code?
#include <stdio.h>
void main()
int x = 5.3 % 2;
printf("Value of x is %d", x);
a) Value of x is 2.3
b) Value of x is 1
c) Value of x is 0.3
d) Compile time error
Answer: d
10. What will be the output of the following C code?
#include <stdio.h>
void main()
int x = 1, y = 0, z = 5;
int a = x && y || z++;
printf("%d", z);
a) 6
b) 5
c) 0
d) Varies
Answer: a
11. What will be the output of the following C code?
#include <stdio.h>
void main()
int x = 1, y = 0, z = 5;
int a = x && y && z++;
printf("%d", z);
a) 6
b) 5
c) 0
d) Varies
Answer: b
12. What will be the output of the following C code?
#include <stdio.h>
int main()
int x = 1, y = 0, z = 3;
x > y ? printf("%d", z) : return z;
a) 3
b) 1
c) Compile time error
d) Run time error
Answer: c
13. What will be the output of the following C code?
#include <stdio.h>
void main()
int x = 1, z = 3;
int y = x << 3;
printf(" %d\n", y);
a) -2147483648
b) -1
c) Run time error
d) 8
Answer: d
14. What will be the output of the following C code?
#include <stdio.h>
void main()
int x = 0, y = 2, z = 3;
int a = x & y | z;
printf("%d", a);
a) 3
b) 0
c) 2
d) Run time error
Answer: a
15. What will be the final value of j in the following C code?
#include <stdio.h>
int main()
int i = 0, j = 0;
if (i && (j = i + 10))
//do something
}
a) 0
b) 10
c) Depends on the compiler
d) Depends on language standard
Answer: a
16. What will be the output of the following C code?
#include <stdio.h>
int main()
int i = 1;
if (i++ && (i == 1))
printf("Yes\n");
else
printf("No\n");
a) Yes
b) No
c) Depends on the compiler
d) Depends on the standard
Answer: b
17. What is the result of logical or relational expression in C?
a) True or False
b) 0 or 1
c) 0 if an expression is false and any positive number if an expression is true
d) None of the mentioned
Answer: b
18. What will be the output of the following C code?
#include <stdio.h>
int main()
int a = 10, b = 5, c = 3;
b != !a;
c = !!a;
printf("%d\t%d", b, c);
a) 5 1
b) 0 3
c) 5 3
d) 1 1
Answer: a
19. Which among the following is NOT a logical or relational operator?
a) !=
b) ==
c) ||
d) =
Answer: d
20. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int c = 2 ^ 3;
printf("%d\n", c);
a) 1
b) 8
c) 9
d) 0
Answer: a
21. What will be the output of the following C code?
#include <stdio.h>
int main()
unsigned int a = 10;
a = ~a;
printf("%d\n", a);
a) -9
b) -10
c) -11
d) 10
Answer: c
22. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int a = 2;
if (a >> 1)
printf("%d\n", a);
a) 0
b) 1
c) 2
d) No Output
Answer: c
23. What will be the output of the following C code?
#include <stdio.h>
void main()
int x = 97;
int y = sizeof(x++);
printf("x is %d", x);
a) x is 97
b) x is 98
c) x is 99
d) Run time error
Answer: a
24. What will be the output of the following C code?
#include <stdio.h>
void main()
{
int x = 4, y, z;
y = --x;
z = x--;
printf("%d%d%d", x, y, z);
a) 3 2 3
b) 2 2 3
c) 3 2 2
d) 2 3 3
Answer: d
25. What will be the output of the following C code?
#include <stdio.h>
int main()
int x = 2, y = 0;
int z = (y++) ? y == 1 && x : 0;
printf("%d\n", z);
return 0;
a) 0
b) 1
c) Undefined behaviour
d) Compile time error
Answer: a
26. What will be the output of the following C code?
#include <stdio.h>
int main()
int x = 1;
short int i = 2;
float f = 3;
if (sizeof((x == 2) ? f : i) == sizeof(float))
printf("float\n");
else if (sizeof((x == 2) ? f : i) == sizeof(short int))
printf("short int\n");
a) float
b) short int
c) Undefined behaviour
d) Compile time error
Answer: a
27. What will be the output of the following C code?
#include <stdio.h>
int main()
int a = 2;
int b = 0;
int y = (b == 0) ? a :(a > b) ? (b = 1): a;
printf("%d\n", y);
}
a) Compile time error
b) 1
c) 2
d) Undefined behaviour
Answer: c
28. What will be the output of the following C code?
#include <stdio.h>
int main()
int y = 1, x = 0;
int l = (y++, x++) ? y : x;
printf("%d\n", l);
a) 1
b) 2
c) Compile time error
d) Undefined behaviour
Answer: a
29. What will be the output of the following C code?
#include <stdio.h>
void main()
1 < 2 ? return 1 : return 2;
}
a) returns 1
b) returns 2
c) Varies
d) Compile time error
Answer: d
30. What will be the final values of a and c in the following C statement? (Initial values: a = 2, c = 1)
c = (c) ? a = 0 : 2;
a) a = 0, c = 0;
b) a = 2, c = 2;
c) a = 2, c = 2;
d) a = 1, c = 2;
Answer: a
31. What is the type of the following assignment expression if x is of type float and y is of type int?
y = x + y;
a) int
b) float
c) there is no type for an assignment expression
d) double
Answer: a
32. Operation “a = a * b + a” can also be written as ___________
a) a *= b + 1;
b) (c = a * b)!=(a = c + a);
c) a = (b + 1)* a;
d) All of the mentioned
Answer: d
33. What will be the final value of c in the following C statement? (Initial value: c = 2)
c <<= 1;
a) c = 1;
b) c = 2;
c) c = 3;
d) c = 4;
Answer: d
34. What will be the output of the following C code?
#include <stdio.h>
void main()
int a = 2 + 4 + 3 * 5 / 3 - 5;
printf("%d", a);
a) 7
b) 6
c) 10
d) 9
Answer: b
35. What will be the output of the following C code?
#include <stdio.h>
void main(
double b = 8;
b++;
printf("%lf", b);
a) 9.000000
b) 9
c) 9.0
d) Run time error
Answer: a
36. What will be the output of the following C code?
#include <stdio.h>
void main()
double b = 5 % 3 & 4 + 5 * 6;
printf("%lf", b);
a) 2
b) 30
c) 2.000000
d) Run time error
Answer: c
37. What will be the output of the following C code?
#include <stdio.h>
int main()
int x = 1, y = 2;
if (x && y == 1)
printf("true\n");
else
printf("false\n");
a) true
b) false
c) compile time error
d) undefined behaviour
Answer: b
38. What will be the output of the following C code?
#include <stdio.h>
int main()
int x = 3, y = 2;
int z = x << 1 > 5;
printf("%d\n", z);
a) 1
b) 0
c) 3
d) Compile time error
Answer: a
39. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int x = 0, y = 2;
if (!x && y)
printf("true\n");
else
printf("false\n");
a) True
b) False
c) Compile time error
d) Undefined behaviour
Answer: a
40. What will be the output of the following C code?
#include <stdio.h>
int main()
int x = 0, y = 2;
int z = ~x & y;
printf("%d\n", z);
a) -1
b) 2
c) 0
d) Compile time error
Answer: b
