Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the difference between the following 2 codes?//Program 1#include <stdio.h> int main() { int n3, n1 = 2, n2 = 3; n3 = n1++ + ++n2; printf("%d %d %d", n3, n1, n2); }//Program 2#include <stdio.h> int main() { int n3, n1 = 2, n2 = 3; n3 = n1++ + +++n2; printf("%d %d %d", n3, n1, n2); }

A. Space does make a difference, values of n1, n2, n3 are different
B. No difference as space doesn t make any difference, values of n1, n2, n3 are same in both the case
C. Program 2 has syntax error, program 1 is not
D. Program 1 has syntax error, program 2 is not
E. None of these
Answer» D. Program 1 has syntax error, program 2 is not
Discussion
2.

What will be the output of the following C code?#include <stdio.h> void main() { int p = 5; int q = ++p + p++ + --p; printf("Value of q is %d", q); }

A. Value of q is 19
B. Value of q is 18
C. Value of q is 17
D. Value of q is 5
E. None of these
Answer» B. Value of q is 18
Discussion
3.

What will be the output of the following C code?#include <stdio.h> int main() { int n = 5; if (n & (n = 6)) printf("True %d n", n); else printf("False %d n", n); }

A. True 5
B. False 5
C. False 6
D. Compilation Error
E. True 6
Answer» F.
Discussion
4.

What will be the output of the following C code?#include <stdio.h> void main() { int num1 = 5; int num2 = 10 % 3 * 12 / 4; printf("Value of num is %d", num2); }

A. Value of num is 0
B. Value of num is 1
C. Value of num is 2
D. Value of num is 3
E. None of these
Answer» E. None of these
Discussion
5.

What will be the output of the following C code?#include <stdio.h> int main() { int n1 = 2, n2 = 2, n3; n3 = n1++ + n2; printf("%d, %d", n1, n2); }

A. 2
B. 3, 2
C. 2, 3
D. Compilation Error
E. None of these
Answer» C. 2, 3
Discussion
6.

What will be the output of the following C code? #include <stdio.h> int main() { int p = 2, q = 2, r = 2; printf("%d, %d, %d", ++p + ++p + p++, p++ + ++q, ++r + r++ + p++); }

A. 2, 2, 2
B. 6, 9, 18
C. 9, 6, 18
D. 18, 6, 9
E. None of these
Answer» E. None of these
Discussion
7.

What will be the output of the following C code?#include <stdio.h> void main() { int num = 7.5 % 3; printf("Value of x is %d", num); }

A. Value of num is 7.5
B. Value of num is 3
C. Value of num is 2.0
D. Compilation Error
E. None of these
Answer» E. None of these
Discussion
8.

What will be the output of the following C code?#include <stdio.h> int main() { int p = 3; if (4 |(p = 4)) printf("p is %d n", p); else printf("%d n", p); }

A. p is 3
B. Compilation Error
C. Runtime Error
D. Garbage value
E. p is 4
Answer» F.
Discussion
9.

What will be the final value of x in the following C code?#include <stdio.h> void main() { int num = 11 * 6 / 5 + 23; }

A. 11
B. 36
C. 5
D. 23
E. Depends on compiler
Answer» C. 5
Discussion
10.

What will be the output of the following C code?#include <stdio.h> int main() { int n = 15, m = 15; if (n = 10) m--; printf("%d, %d", n, m--); }

A. 15, 15
B. 14, 10
C. 10, 15
D. 10, 14
E. None of these
Answer» E. None of these
Discussion
11.

What will be the output of the following C code?#include <stdio.h> int main() { int k = -13; k = k / 3; printf("%d n", k); return 0; }

A. -13
B. 3
C. -4
D. All of above
E. None of these
Answer» D. All of above
Discussion
12.

What will be the output of the following C code?#include <stdio.h> int main() { int n = -7; if (!0 == 1) printf("Yes n"); else printf("No n"); }

A. Compilation Error
B. Runtime Error
C. Garbage value
D. Yes
E. No
Answer» E. No
Discussion
13.

Which of the following is the correct output for the program given below?#include <stdio.h>int main ( ){ int a = 9, b, c; b = --a; c = a--; printf ( "%d %d %d n", a, b, c); return 0;}

A. 9 8 8
B. 9 8 7
C. 8 8 7
D. 7 8 8
E. 7 7 8
Answer» E. 7 7 8
Discussion
14.

Which of the following statements are correct about the code snippet given below?int number = 10;int p = number > 5 ? p = 30;

A. First; is treated as a null statement
B. Second; is treated as a statement terminator
C. 30 would be assigned to p
D. Compiler would report an error
Answer» E.
Discussion
15.

Which of the following is the correct output for the program given below ?#include <stdio.h>int main ( ){ int x = 10, y = 20, z; z = (x == 10 || y > 20); printf ( "z = %d n", z); return 0;}

A. z = 100
B. z = 200
C. z = 1
D. z = 0
E. z = 300
Answer» D. z = 0
Discussion
16.

Which of the following is the correct output for the program given below ?#include <stdio.h>int main ( ){ int a = 12, b = 7, c; c = a != 4 || b == 2; printf ("c = %d n" , c); return 0;}

A. c = 0
B. c = 1
C. c = 4
D. c = 2
Answer» C. c = 4
Discussion
17.

Which of the following is the correct output for the program given below? #include <stdio.h>int main ( ){ int a = 4, b = -1, c = 0, p, q, r, s; p = a || b || c; q = a && b && c; r = a || b && c; s = a && b || c; printf ("%d %d %d %d n", p, q, r, s); return 0;}

A. 1 1 1 1
B. 1 1 0 1
C. 1 0 0 1
D. 0 1 1 1
E. 1 0 1 1
Answer» F.
Discussion
18.

What will be the output of the following C code?#include <stdio.h> int main() { if (~2 == 3) { printf("Yes n"); } else { printf("No n"); } }

A. Compilation Error
B. Runtime Error
C. Garbage value
D. Yes
E. No
Answer» F.
Discussion
19.

What will be the output of the following C code?#include <stdio.h> int main() { int k = 13; k = k / 3; printf("%d n", k); return 0; }

A. 13
B. 3
C. 4
D. All of above
E. None of these
Answer» D. All of above
Discussion
20.

What will be the output of the following C code?#include <stdio.h> int main() { int k = 2; int L = k++ + k; printf("%d n", L); }

A. Compilation Error
B. Runtime Error
C. 2
D. 5
E. None of these
Answer» E. None of these
Discussion
21.

Which of the following is the correct output for the program given below? #include <stdio.h>int main ( ){ int a, b, c; a = b = c = 1; c = ++a || ++b && ++c; printf ( "a = %d b = %d c = %d n", a , b, c); return 0;}

A. a = 2 b = 1 c = 1
B. a = 2 b = 2 c = 2
C. a = 2 b = 2 c = 1
D. a = 1 b = 2 c = 1
Answer» B. a = 2 b = 2 c = 2
Discussion
22.

What will be the output of the following C code?#include <stdio.h> void main() { int p = -6; int s = (p++, ++p); printf("%d n", s); }

A. 6
B. -6
C. 4
D. -4
E. Compilation Error
Answer» E. Compilation Error
Discussion
23.

What will be the output of the following C code?#include <stdio.h> void main() { int n = 5; int *ptr = &n; int *q = ptr++; int r = ptr - q; printf("%d", r); }

A. Compilation Error
B. 5
C. 1
D. Runtime Error
E. None of these
Answer» D. Runtime Error
Discussion
24.

What will be the output of the following C code? #include <stdio.h> void main() { int p = 6, q, r; q = --p; r = p--; printf("%d %d %d", p, q, r); }

A. 5 5 4
B. 5 4 5
C. Compilation Error
D. 4 5 5
E. None of these
Answer» E. None of these
Discussion
25.

What will be the output of the following C code?#include <stdio.h> void main() { int n1 = 100; int n2 = sizeof(n1++); printf("n1 is %d", n1); }

A. n1 is 100
B. Compilation Error
C. Runtime Error
D. Garbage value
E. None of these
Answer» B. Compilation Error
Discussion
26.

What will be the output of the following C code?#include <stdio.h> int main() { int n = -5; n = n >> 2; printf("%d n", n); }

A. -5
B. 2
C. Compilation Error
D. -2
E. Either -1 or 1
Answer» E. Either -1 or 1
Discussion
27.

What will be the output of the following C code?#include <stdio.h> int main() { int num = 7; num = num << 2; printf("%d n", num); }

A. 28
B. 7
C. 2
D. Compilation Error
E. None of these
Answer» B. 7
Discussion
28.

What will be the output of the following C code?#include <stdio.h> void main() { int n = -7; int p = (n++, ++n); printf("%d n", p); }

A. -7
B. Compilation Error
C. -5
D. Runtime Error
E. None of these
Answer» D. Runtime Error
Discussion
29.

What will be the output of the following C code?#include <stdio.h> void main() { int num1 = 7, num2 = -9, num3 = 3, num4; num4 = ++num1 && ++num2 || ++num3; printf("%d %d %d %d", num1, num2, num3, num4); }

A. 8 -8 3 1
B. 1 3 8 -8
C. 1 8 -8 3
D. 8 1 3 -8
E. None of these
Answer» B. 1 3 8 -8
Discussion
30.

What will be the output of the following C code?#include void main() { int n = 6; int *ptr1 = &n; int *ptr2 = ptr1++; int Res = ptr1 - ptr2; printf("%d", Res); }

A. 1
B. 6
C. Compilation Error
D. Runtime Error
E. None of these
Answer» B. 6
Discussion
31.

Comment on the output of the following C code.#include <stdio.h> int main() { int k, num, x = 6; scanf("%d", &num); for (k = 0; k < num; k++) num = num * 3; }

A. Bitwise exclusive OR
B. Arithmetic Shift right
C. Logical Shift left
D. No output
E. None of these
Answer» E. None of these
Discussion
32.

What will be the output of the following C code?#include <stdio.h> int main() { int num = 4; if (num >> 2) printf("%d n", num); }

A. 2
B. Compilation Error
C. 4
D. Runtime Error
E. None of these
Answer» D. Runtime Error
Discussion
33.

What will be the output of the following C code?#include <stdio.h> int main() { if (7 & 8) printf("All"); if ((~7 & 0x000f) == 8) printf("that glitters is not gold. n"); }

A. All
B. All that glitters is not gold
C. that glitters is not gold
D. Compilation Error
E. None of these
Answer» D. Compilation Error
Discussion
34.

What will be the output of the following C code?#include <stdio.h> int main() { int k = 3; int L = ++k + k; printf("%d n", L); }

A. 3
B. Compilation Error
C. 8
D. Runtime Error
E. None of these
Answer» D. Runtime Error
Discussion
35.

What will be the output of the following C code?#include <stdio.h> int main() { int n = 12; int m = n / -5; int p = n % -5; printf("%d %d n", m, p); return 0; }

A. -2
B. 2
C. 2 -2
D. -2 2
E. None of these
Answer» E. None of these
Discussion
36.

What will be the output of the following C code? #include <stdio.h> int main() { unsigned int num = 20; num = ~num; printf("%d n", num); }

A. -21
B. Compilation Error
C. 20
D. Runtime Error
E. None of these
Answer» B. Compilation Error
Discussion
37.

What will be the output of the following C code?

A. 3 4 4
B. 4 4 3
C. 4 3 3
D. 4 3 4
E. Compilation Error
Answer» B. 4 4 3
Discussion
38.

What will be the output of the following C code?#include <stdio.h> int main() { int n = -5; int m = n % 2; printf("%d n", m); }

A. -1
B. 1
C. Compilation Error
D. Runtime Error
E. None of these
Answer» B. 1
Discussion
39.

What will be the output of the following C code?#include <stdio.h> void main() { int num1 = 99; int num2 = sizeof(num1++); printf("num1 is %d", num1); }

A. num1 is 97
B. num1 is 98
C. num1 is 99
D. Compilation Error
E. None of these
Answer» D. Compilation Error
Discussion
40.

What will be the output of the following C code?#include <stdio.h> int main() { int k = 12; int *ptr = &k; printf("%d n", *ptr++); }

A. Compilation Error
B. 12
C. Runtime Error
D. Address of k
E. None of these
Answer» C. Runtime Error
Discussion
41.

What will be the output of the following C code?#include <stdio.h> int main() { int k = 1; int n = k++, m = ++k; printf("%d % d n", n, m); return 0; }

A. 1
B. 3
C. 3 1
D. 1 3
E. None of these
Answer» E. None of these
Discussion
42.

What will be the output of the following C code?#include <stdio.h> int main() { int k = 3; int k = k++ + k; printf("%d n", k); }

A. 3
B. 4
C. 5
D. Compilation Error
E. None of these
Answer» E. None of these
Discussion
43.

Which of the following is the correct order of calling functions in the code snippet given below?a = f1 (10, 20 ) * f2 (30/40) + f3();

A. f1, f2, f3
B. f3, f2, f1
C. The order may vary from compiler to compiler
D. None of the above
Answer» D. None of the above
Discussion
44.

Which of the following is the correct output for the program given below?#include <stdio.h>int main ( ){ int a = 25; printf ("%d %d %d n",a <= 20, a = 15, a >= 10); return 0;}

A. 1 15 1
B. 1 20 1
C. 1 25 0
D. 1 1 1
E. 0 0 0
Answer» B. 1 20 1
Discussion
45.

Which of the following is correct order of evaluation for the expression given below ?

A. * / % + - =
B. = * / % + -
C. / * % - + =
D. * / % - + =
E. - % / * + =
Answer» B. = * / % + -
Discussion
46.

What will be the final values of p and q in the following C statement? (Initial values: p = 2, q = 1)

A. p = 1, q = 2;
B. p = 2, q = 2;
C. p = 2, q = 2;
D. p = 0, q = 0;
E. None of these
Answer» E. None of these
Discussion
47.

What will be the final values of p and q in the following C code?

A. k value is 0 and L value is 0
B. k and L value are undefined
C. Compilation Error
D. Runtime Error
E. None of these
Answer» D. Runtime Error
Discussion
48.

What will be the final values of k and L in the following C code?

A. k value is 0 and L value is 0
B. Compilation Error
C. k value is 1 and L value is 1
D. Runtime Error
E. None of these
Answer» B. Compilation Error
Discussion
49.

What will be the output of the following C function?

A. 2 3
B. 2 3 4
C. 2 3 4 5 6 7
D. 5 6 7
E. 5 6
Answer» D. 5 6 7
Discussion
50.

What will be the final value of c in the following C code snippet? (Initial values: p = 1, q = 2, r = 1)

A. r = 2
B. r = 3
C. r = 1
D. Syntax Error
E. None of these
Answer» B. r = 3
Discussion