Explore topic-wise MCQs in C Programming.

This section includes 49 Mcqs, each offering curated multiple-choice questions to sharpen your C Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int n = 1;
 switch (n)
 {
 case n:
 printf("Case N ");
 default:
 printf("Default");
 }
 }
A. Compilation Error
B. Case N
C. Default
D. All of above
E. None of these
Answer» B. Case N
Discussion
2.

Which of the following statement are correct about the program given below?
#include <stdio.h>
int main ( )
{
 int x = 10, y = 20;
 if (x == 15) && if (y == 20)
 printf ("Have a nice day n");
 return 0;
}
A. Output: Have a nice day
B. No output
C. Error: 'Expression syntax'
D. Error: 'Undeclared identifier if'
Answer» D. Error: 'Undeclared identifier if'
Discussion
3.

Which of the following statement are correct about the program given below?
#include <stdio.h>
int main ( )
{
 int a = 40, b = 50;
 if ( a == b )
 printf ("a is equal to b  n");
 elseif (a > b)
 printf ("a is greater than b n");
 elseif (a < b)
 printf ("a is less than b n");
 return 0;
}
A. Error: 'elseif is not a keyword in C'
B. Error: 'Expression syntax'
C. Error: 'L value required'
D. Error: 'R value requaired'
Answer» B. Error: 'Expression syntax'
Discussion
4.

Which of the following is the correct output for the program given below?
#include <stdio.h>
int main ()
{
 int a = 400, b, c;
 if ( a >= 500)
 b = 400;
 c = 300;
 printf ( "%d %d %d  n" , a, b, c);
 return 0;
}
A. 400 400 300
B. Garbage 400 300
C. 400 Garbage 300
D. 400 400 Garbage`
Answer» D. 400 400 Garbage`
Discussion
5.

Which of the following is the correct output for the program given below ?
#include <stdio.h>
int main ( )
{
 int k = 5;
 switch (k)
 {
 case 1:
 printf ("Good Morning n");
 case 2:
 printf ("Good Evening n");
 break;
 case 3:
 continue;
 default:
 printf ("Bye n");
 }
 return 0;
}
A. Error: 'Misplaced Continue'
B. Bye
C. No output
D. Good Morning
E. Good Evening
Answer» B. Bye
Discussion
6.

Which of the following cannot be checked in a switch - case statement?

A. Character
B. Integer
C. Float
D. enum
Answer» D. enum
Discussion
7.

What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input).
#include <stdio.h>
 void main()
 {
 char *n;
 printf("Enter a value between 1 to 3:");
 scanf("%s", n);
 switch (n)
 {
 case "1":
 printf("Hey");
 break;
 case "2":
 printf("Hello");
 break;
 }
 }
A. Hey
B. Hellow
C. Compilation Error
D. Runtime Error
E. None of these
Answer» D. Runtime Error
Discussion
8.

Comment on the output of the following C code.
 #include <stdio.h>
 int main()
 {
 int num = 2;
 switch (num)
 case 1:
 printf("%d", num);
 case 2:
 printf("%d", num);
 case 3:
 printf("%d", num);
 default:
 printf("%d", num);
 }
A. No error, output is 2
B. Compile time error, case label outside switch statement
C. No error, output is 2222
D. Compile time error, no break statements
E. None of these
Answer» C. No error, output is 2222
Discussion
9.

What will be the output of the following C code?
#include <stdio.h>
 #define max(p) p
 int main()
 {
 int n = 1;
 switch (n)
 {
 case max(2):
 printf("Right... n");
 case max(1):
 printf("Wrong... n");
 break;
 }
 }
A. Right...
B. Wrong...
C. Right... Wrong...
D. Compilation Error
E. None of these
Answer» D. Compilation Error
Discussion
10.

What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input).
#include <stdio.h>
 void main()
 {
 double var;
 printf("Enter a value between 1 to 2:");
 scanf("%lf", &var);
 switch (var)
 {
 case 1:
 printf("1");
 break;
 case 2:
 printf("2");
 break;
 }
 }
A. 1
B. Compilation Error
C. 2
D. Runtime Error
E. None of these
Answer» C. 2
Discussion
11.

What will be the output of the following C code?
 #include <stdio.h>
 int main()
 {
 if (printf("%d", printf(")))
 printf("I am Sad...");
 else if (printf("1"))
 printf("I am Happy...");
 }
A. Runtime Error
B. I am Sad...
C. I am Happy...
D. Compilation Error
E. None of these
Answer» E. None of these
Discussion
12.

What will be the output of the following C code?
 #include <stdio.h>
 const int n = 10, m = 12;
 int main()
 {
 int P = 10;
 switch (P)
 {
 case n:
 printf("Yes...");
 case m:
 printf("No... n");
 break;
 }
 }
A. Yes...
B. No...
C. Yes... No...
D. Runtime Error
E. Compilation Error
Answer» D. Runtime Error
Discussion
13.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int n = 98;
 switch (n)
 {
 case 'b':
 printf("Right... ");
 break;
 case 98:
 printf("Wrong... n");
 break;
 }
 }
A. Character case value error
B. Right...
C. Wrong...
D. Duplicate case value error
E. None of these
Answer» E. None of these
Discussion
14.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 float n = 12;
 switch (n)
 {
 case 1.0:
 printf("Option: First n");
 break;
 default:
 printf("Option: Default n");
 }
 }
A. 12
B. Option: First
C. Option: Default
D. Compilation Error
E. None of these
Answer» E. None of these
Discussion
15.

What will be the output of the following C code? (Assuming that we have entered the value 3 in the standard input).
#include <stdio.h>
 int main()
 {
 int num;
 printf("Enter a value between 1 to 2:");
 scanf("%d", &num);
 switch (num)
 {
 case 1:
 printf("Hey... n");
 default:
 printf("Hello... n");
 }
 }
A. Runtime Error
B. Compilatin Error
C. Hey...
D. Hello...
E. None of these
Answer» E. None of these
Discussion
16.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int n = 10, m = 10;
 switch (n)
 {
 case n*m:
 printf("True ");
 case n-m:
 printf("False n");
 break;
 }
 }
A. 10
B. Compilation Error
C. 10
D. True
E. False
Answer» C. 10
Discussion
17.

What will be the output of the following C code? (Assuming that we have entered the value 2 in the standard input).
#include <stdio.h>
 int main()
 {
 int var;
 printf("Enter a value between 1 to 2: ");
 scanf("%d", &var);
 switch (var, var + 1)
 {
 case 1:
 printf("Option 1.");
 break;
 case 2:
 printf("Option 2.");
 break;
 default :
 printf("Default option.");
 }
 }
A. Option 1.
B. Option 2.
C. Default option.
D. Compilation Error
E. None of these
Answer» D. Compilation Error
Discussion
18.

What will be the output of the following C code? (Assuming that we have entered the value 2 in the standard input).
#include <stdio.h>
 int main()
 {
 int p;
 printf("Enter a value between 1 to 2:");
 scanf("%d", &p);
 switch (p)
 {
 case 1:
 printf("hey... n");
 break;
 printf("Hello...");
 default:
 printf("How are U? n");
 }
 }
A. Hey...
B. Hello...
C. How are U?
D. All of above
E. None of these
Answer» D. All of above
Discussion
19.

What will be the output of the following C code?
 #include <stdio.h>
 int main()
 {
 int n = 1;
 if (n)
 printf("Everything is okay.");
 printf("Everything is not okay. n");
 else
 printf("I have fever n");
 }
A. Everything is okay.
B. Everything is not okay.
C. I have fever.
D. Compilation Error
E. Runtime Error
Answer» E. Runtime Error
Discussion
20.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int n = 1;
 if (n--)
 printf("Right...");
 if (n++)
 printf("Wrong...");
 }
A. Compilation Error
B. Runtime Error
C. Right...
D. Wrong...
E. None of these
Answer» D. Wrong...
Discussion
21.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int n = 0;
 if (n == 1)
 if (n >= 0)
 printf("True... n");
 else
 printf("False... n");
 }
A. Compilation Error
B. False...
C. True...
D. It will print nothing.
E. None of these
Answer» E. None of these
Discussion
22.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int n = 5;
 if (n == 5)
 printf("True, ");
 else if (n = 20)
 printf("False, ");
 printf("%d n", n);
 }
A. False, 20
B. 20, False
C. 5, True
D. True, 5
E. None of these
Answer» E. None of these
Discussion
23.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int p = 0;
 if (p == 1)
 if (p == 0)
 printf("Inside if block executed... n");
 else
 printf("Inside else if block executed... n");
 else
 printf("Inside else block executed... n");
 }
A. Inside else block executed...
B. Inside if block executed...
C. Inside else if block executed...
D. Compilation Error
E. None of these
Answer» B. Inside if block executed...
Discussion
24.

What will be the output of the following C code?
#include <stdio.h<
 int n;
 void main()
 {
 if (n)
 printf("Hey");
 else
 printf("How are u?");
 }
A. Compilation Error
B. Hey
C. How are u?
D. Runtime Error
E. None of these
Answer» D. Runtime Error
Discussion
25.

What will be the output of the following C code?
#include <stdio.h>
 void main()
 {
 int num = 6;
 if (num < 2)
 printf("Hello");
 if (num == 6)
 printf("Hey");
 else
 printf("No");
 }
A. 6
B. Hey
C. Hello
D. No
E. None of these
Answer» C. Hello
Discussion
26.

What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)
#include <stdio.h>
 void main()
 {
 char *name;
 printf("Enter a value between 1 to 3:");
 scanf("%s", name);
 switch (name)
 {
 case "1":
 printf("1");
 break;
 case "2":
 printf("2");
 break;
 }
 }
A. name
B. 1
C. 2
D. Compilation Error
E. None of these
Answer» E. None of these
Discussion
27.

What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)
#include <stdio.h>
 void main()
 {
 double n;
 printf("Enter a value between 1 to 2:");
 scanf("%lf", &n);
 switch (n)
 {
 case 1:
 printf("1");
 break;
 case 2:
 printf("2");
 break;
 }
 }
A. 1
B. 2
C. Garbage value
D. Compilation Error
E. None of these
Answer» E. None of these
Discussion
28.

What will be the output of the following C code?
 #include <stdio.h>
 void main()
 {
 int p = 15;
 if (true);
 printf("Hey... Hellow...");
 }
A. Hey..
B. Hellow...
C. 15
D. true
E. Compilation Error
Answer» F.
Discussion
29.

What will be the output of the following C code?
 #include <stdio.h>
 void main()
 {
 int p = 6;
 if (p < 2);
 printf("Hey...");
 
 }
A. 2
B. 6
C. Compilation Error
D. Hello
E. None of these
Answer» E. None of these
Discussion
30.

What will be the output of the following C code?
#include <stdio.h>
 void main()
 {
 int n = 2;
 if (n == 2)
 printf("Hey ");
 else
 printf("How are u? ");
 printf("Hello ");
 }
A. Hey
B. Hello
C. Hey Hello
D. Hey Hello How are u?
E. Hey How are u? Hello
Answer» D. Hey Hello How are u?
Discussion
31.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int n = 1;
 if (n++)
 printf("True n");
 else if (n == 2)
 printf("False n");
 }
A. True
B. False
C. Compilation Error
D. Runtime Error
E. None of these
Answer» B. False
Discussion
32.

What will be the output of the following C code?
#include <stdio.h>
 int main()
 {
 int n = 5;
 if (n > 1)
 printf("Inside if block executed... n");
 else if (n > 1)
 printf("Inside else if block executed... n");
 }
A. Compilation Error
B. Inside if block executed...
C. Inside else if block executed...
D. Runtime Error
E. None of these
Answer» C. Inside else if block executed...
Discussion
33.

What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)
#include <stdio.h>
 void main()
 {
 int n;
 printf("Enter a value between 1 to 2:");
 scanf("%d", &n);
 switch (n, n + 1)
 {
 case 1:
 printf("1 n");
 break;
 case 2:
 printf("2");
 break;
 }
 }
A. Compilation Error
B. 1
C. Runtime Error
D. 2
E. None of these
Answer» E. None of these
Discussion
34.

What will be the output of the following C code? (Assuming that we have entered the value 2 in the standard input)
 #include <stdio.h>
 void main()
 {
 int num;
 printf("Enter a value between 1 to 2:");
 scanf("%d", &num);
 switch (num)
 {
 case 1:
 printf("1 n");
 break;
 printf("Hey...");
 default:
 printf("2 n");
 }
 }
A. 1
B. Hey...
C. 2
D. Compilation Error
E. Runtime Error
Answer» D. Compilation Error
Discussion
35.

What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)
#include <stdio.h>
 void main()
 {
 int var;
 printf("Enter a value between 1 to 2:");
 scanf("%d", &var);
 switch (var)
 {
 case 1:
 printf("1 n");
 default:
 printf("2 n");
 }
 }
A. Compilation Error
B. Runtime Error
C. 1
D. 1 2
E. 2
Answer» E. 2
Discussion
36.

Which of the following statements are correct about the program given below?
#include <stdio.h>
int main ( )
 {
 int a = 0, b = 1;
 b == 1 ? (a = 0) : (a = 1);
 if (a)
 printf ("YES n");
 else
 printf ("No n");
 return 0;
}
A. Error: 'Declaration terminated incorrectly'
B. Error: 'Syntax error'
C. Error: 'Lvalue required'
D. Error: 'Expression syntax'
E. The program works correctly without error.
Answer» F.
Discussion
37.

Which of the following is the correct output for the program given below?
#include <stdio.h>
int main ( )
{ 
 int a = 5;
 float b = 5.0;
 if (a == b)
 printf (" a and b are equal n");
 else 
 printf ("a and b are not equal n");
 return 0;
}
A. a and b are equal
B. a and b are not equal
C. Unpredictable
D. No output
Answer» B. a and b are not equal
Discussion
38.

Which of the following statements are correct about the following program?
#include <stdio.h>
int main ( )
{
 int a = 20, b = 30;
 if (a % 2 = b % 3)
 printf (" n Carpathians");
 return 0;
}
A. Error : 'Expression syntax'
B. Error : 'L value required'
C. Error : 'R value required'
D. The code runs successfully.
Answer» C. Error : 'R value required'
Discussion
39.

Which of the following is the correct output for the program given below?
#include <stdio.h>
int main ( )
{
 int x = 0, y = 1, z = 3;
 * ( ( x ) ? &y : &x = x ? y :z;
 printf ("%d %d %d n", x, y, z);
 return 0;
}
A. 0 1 3
B. 1 2 3
C. 3 1 3
D. 1 3 1
Answer» D. 1 3 1
Discussion
40.

Which of the following is the correct output for the program given below ?
#include <studio.h>
int main ( )
{
 char ch;
 if ((ch = printf ("")));
 printf ("I am inside if  n");
 else
 printf ("I am inside else n");

 return 0;
}
A. I am inside if
B. I am inside else
C. random value
D. No Output
Answer» C. random value
Discussion
41.

Which of the following is the correct output for the program given below?
#include <stdio.h>
int main ( )
{
 int x = 600, y = 200, z;
 if (!x >= 400)
 y = 300;
 z = 450;
 printf ("y = %d z = %d n", y, z);
 return 0;
}
A. y = 300 z = 200
B. y = 200 z = garbage
C. y = 300 z = garbage
D. y = 200 z = 450
E. y = 200 z = 600
Answer» E. y = 200 z = 600
Discussion
42.

Which of the following is the correct output for the program given below ?
#include <stdio.h>
int main ()
{
 int k, number = 50;
 k = (number >10 ? (number <= 70 ? 220 : 710) : 650);
 printf ("%d n", k);
 return 0;
}
A. 220
B. 50
C. 710
D. 650
Answer» B. 50
Discussion
43.

Which of the following is the correct output for the program given below?
#include <studio.h>
int main()
{
 int a = 50, b = 60;
 if(!(!a) &&a)
 printf("a = %d n",a)'
 else
 printf("b = %d n",b);
 
 return 0;
}

A. b = 60
B. a = 0
C. a = 50
D. a = 1
Answer» D. a = 1
Discussion
44.

What will be the output of the following C code? (Assuming that we have entered the value 2 in the standard input)

A. 1
B. Hey...
C. 2
D. Compilation Error
E. Runtime Error
Answer» D. Compilation Error
Discussion
45.

What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)

A. Compilation Error
B. 1
C. Runtime Error
D. 2
E. None of these
Answer» E. None of these
Discussion
46.

What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input).

A. Hey
B. Hellow
C. Compilation Error
D. Runtime Error
E. None of these
Answer» D. Runtime Error
Discussion
47.

What will be the output of the following C code? (Assuming that we have entered the value 3 in the standard input).

A. Runtime Error
B. Compilatin Error
C. Hey...
D. Hello...
E. None of these
Answer» E. None of these
Discussion
48.

What will be the output of the following C code? (Assuming that we have entered the value 2 in the standard input).

A. Option 1.
B. Option 2.
C. Default option.
D. Compilation Error
E. None of these
Answer» D. Compilation Error
Discussion
49.

Which of the following cannot be checked in a

A. Character
B. Integer
C. Float
D. enum
Answer» D. enum
Discussion