Explore topic-wise MCQs in C Programming.

This section includes 117 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 program, if a is 2 bytes wide?

A. 1 ... 65535
B. Expression syntax error
C. No output
D. 0, 1, 2, 3, 4, 5
Answer» B. Expression syntax error
Discussion
2.

Which of the following statements are correct about the below C-program?

A. 1
B. 2, 3
C. 3, 4
D. 4
Answer» C. 3, 4
Discussion
3.

Which of the following sentences are correct about a loop in a C program?

A. 1
B. 1, 2
C. 2, 3
D. 2, 3, 4
Answer» E.
Discussion
4.

Which of the following statements are correct about an statements in a C-program?

A. 1 and 2
B. 2 and 3
C. 1, 2 and 4
D. 2, 3, 4
Answer» E.
Discussion
5.

A is at least 16 bits wide and a is at least 32 bits wide.

A. True
B. False
Answer» B. False
Discussion
6.

If is used to store a value in a variable then along with the value a carriage return(\r) also gets stored it.

A. True
B. False
Answer» C.
Discussion
7.

The modulus operator cannot be used with a .

A. True
B. False
Answer» B. False
Discussion
8.

The way the is used to take control out of and to take control of the beginning of the ?

A. Yes
B. No
Answer» C.
Discussion
9.

Can we use a statement to switch on strings?

A. Yes
B. No
Answer» C.
Discussion
10.

We want to test whether a value lies in the range 2 to 4 or 5 to 7. Can we do this using a ?

A. Yes
B. No
Answer» B. No
Discussion
11.

By default, the data type of a constant without a decimal point is , whereas the one with a decimal point is a .

A. Yes
B. No
Answer» B. No
Discussion
12.

How many times the loop will get executed if a is 2 byte wide?

A. Infinite times
B. 255 times
C. 256 times
D. 254 times
Answer» C. 256 times
Discussion
13.

Which of the following cannot be checked in a statement?

A. Character
B. Integer
C. Float
D. enum
Answer» D. enum
Discussion
14.

Which of the following statements are correct? The switch statement is a control statement that handles multiple selections and enumerations by passing control to one of the case statements within its body. The goto statement passes control to the next iteration of the enclosing iteration statement in which it appears. Branching is performed using jump statements which cause an immediate transfer of the program control. A common use of continue is to transfer control to a specific switch-case label or the default label in a switch statement. The do statement executes a statement or a block of statements enclosed in {} repeatedly until a specified expression evaluates to false.

A. 1, 2, 4
B. 1, 3, 5
C. 2, 3, 4
D. 3, 4, 5
E. None of these
Answer» C. 2, 3, 4
Discussion
15.

Which of the following statements are correct? A switch statement can act on numerical as well as Boolean types. A switch statement can act on characters, strings and enumerations types. We cannot declare variables within a case statement if it is not enclosed by { }. The foreach statement is used to iterate through the collection to get the desired information and should be used to change the contents of the collection to avoid unpredictable side effects. All of the expressions of the for statement are not optional.

A. 1, 2
B. 2, 3
C. 3, 5
D. 4, 5
E. None of these
Answer» B. 2, 3
Discussion
16.

Which of the following statements are correct about the C#.NET code snippet given below? if (age > 18 || no < 11) a = 25;The condition no < 11 will get evaluated only if age > 18 evaluates to False. The condition no < 11 will get evaluated if age > 18 evaluates to True. The statement a = 25 will get evaluated if any one one of the two conditions is True. || is known as a short circuiting logical operator. The statement a = 25 will get evaluated only if both the conditions are True.

A. 1, 4, 5
B. 2, 4
C. 1, 3, 4
D. 2, 3, 5
E. None of these
Answer» D. 2, 3, 5
Discussion
17.

Which of the following can be used to terminate a while loop and transfer control outside the loop? exit while continue exit statement break goto

A. 1, 3
B. 2, 4
C. 3, 5
D. 4, 5
E. None of these
Answer» E. None of these
Discussion
18.

Which of the following code snippets are the correct way to determine whether a is Odd or Even? int a; String res; if (a % 2 == 0) res = "Even"; else res = "Odd"; int a; String res; if (a Mod 2 == 0) res = "Even"; else res = "Odd"; int a; Console.WriteLine(a Mod 2 == 0 ? "Even": "Odd"); int a; String res; a % 2 == 0 ? res = "Even" : res = "Odd"; Console.WriteLine(res);

A. 1, 3
B. 1 Only
C. 2, 3
D. 4 Only
E. None of these
Answer» C. 2, 3
Discussion
19.

Which of the following is another way to rewrite the code snippet given below?int a = 1, b = 2, c = 0; if (a < b) c = a;

A. int a = 1, b = 2, c = 0; c = a < b ? a : 0;
B. int a = 1, b = 2, c = 0; a < b ? c = a : c = 0;
C. int a = 1, b = 2, c = 0; a < b ? c = a : c = 0 ? 0 : 0;
D. int a = 1, b = 2, c = 0; a < b ? return (c): return (0);
E. int a = 1, b = 2,c = 0; c = a < b : a ? 0;
Answer» B. int a = 1, b = 2, c = 0; a < b ? c = a : c = 0;
Discussion
20.

Which of the following statements are correct about the C#.NET code snippet given below? if (age > 18 && no < 11) a = 25;The condition no < 11 will be evaluated only if age > 18 evaluates to True. The statement a = 25 will get executed if any one condition is True. The condition no < 11 will be evaluated only if age > 18 evaluates to False. The statement a = 25 will get executed if both the conditions are True. && is known as a short circuiting logical operator.

A. 1, 3
B. 2, 5
C. 1, 4, 5
D. 3, 4, 5
E. None of these
Answer» D. 3, 4, 5
Discussion
21.

How many times the while loop will get executed if a short int is 2 byte wide?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int j=1;_x000D_ while(j <= 255)_x000D_ {_x000D_ printf("%c %d\n", j, j);_x000D_ j++;_x000D_ }_x000D_ return 0;_x000D_ }

A. Infinite times
B. 255 times
C. 256 times
D. 254 times
Answer» C. 256 times
Discussion
22.

What will be the output of the program?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int x=1, y=1;_x000D_ for(; y; printf("%d %d\n", x, y))_x000D_ {_x000D_ y = x++ <= 5;_x000D_ }_x000D_ printf("\n");_x000D_ return 0;_x000D_ }

A. 2 13 14 15 16 17 0
B. 2 13 14 15 16 1
C. 2 13 14 15 1
D. 2 23 34 45 5
Answer» B. 2 13 14 15 16 1
Discussion
23.

What will be the output of the program?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ char j=1;_x000D_ while(j < 5)_x000D_ {_x000D_ printf("%d, ", j);_x000D_ j = j+1;_x000D_ }_x000D_ printf("\n");_x000D_ return 0;_x000D_ }

A. 1 2 3 ... 127
B. 1 2 3 ... 255
C. 1 2 3 ... 127 128 0 1 2 3 ... infinite times
D. 1, 2, 3, 4
Answer» E.
Discussion
24.

What will be the output of the program?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int a=0, b=1, c=3;_x000D_ *((a) ? &b : &a) = a ? b : c;_x000D_ printf("%d, %d, %d\n", a, b, c);_x000D_ return 0;_x000D_ }

A. 0, 1, 3
B. 1, 2, 3
C. 3, 1, 3
D. 1, 3, 1
Answer» D. 1, 3, 1
Discussion
25.

What will be the output of the program?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int i=3;_x000D_ switch(i)_x000D_ {_x000D_ case 1:_x000D_ printf("Hello\n");_x000D_ case 2:_x000D_ printf("Hi\n");_x000D_ case 3:_x000D_ continue;_x000D_ default:_x000D_ printf("Bye\n");_x000D_ }_x000D_ return 0;_x000D_ }

A. Error: Misplaced continue
B. Bye
C. No output
D. Hello Hi
Answer» B. Bye
Discussion
26.

What will be the output of the program?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ float a = 0.7;_x000D_ if(0.7 > a)_x000D_ printf("Hi\n");_x000D_ else_x000D_ printf("Hello\n");_x000D_ return 0;_x000D_ }

A. Hi
B. Hello
C. Hi Hello
D. None of above
Answer» B. Hello
Discussion
27.

What will be the output of the program?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int a = 300, b, c;_x000D_ if(a >= 400)_x000D_ b = 300;_x000D_ c = 200;_x000D_ printf("%d, %d, %d\n", a, b, c);_x000D_ return 0;_x000D_ }

A. 300, 300, 200
B. Garbage, 300, 200
C. 300, Garbage, 200
D. 300, 300, Garbage
Answer» D. 300, 300, Garbage
Discussion
28.

Point out the error, if any in the program._x000D_ #include int main() { int i = 1; switch(i) { printf("This is c program."); case 1: printf("Case1"); break; case 2: printf("Case2"); break; } return 0; }

A. Error: No default specified
B. Error: Invalid printf statement after switch statement
C. No Error and prints "Case1"
D. None of above
Answer» D. None of above
Discussion
29.

What will be the output of the program?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int i = 5;_x000D_ while(i-- >= 0)_x000D_ printf("%d,", i);_x000D_ i = 5;_x000D_ printf("\n");_x000D_ while(i-- >= 0)_x000D_ printf("%i,", i);_x000D_ while(i-- >= 0)_x000D_ printf("%d,", i);_x000D_ return 0;_x000D_ }

A. 4, 3, 2, 1, 0, -14, 3, 2, 1, 0, -1
B. 5, 4, 3, 2, 1, 05, 4, 3, 2, 1, 0
C. Error
D. 5, 4, 3, 2, 1, 05, 4, 3, 2, 1, 05, 4, 3, 2, 1, 0
Answer» B. 5, 4, 3, 2, 1, 05, 4, 3, 2, 1, 0
Discussion
30.

Which of the following statements are correct about the below C-program? #include int main() { int x = 10, y = 100%90, i; for(i=1; i<10; i++) if(x != y); printf("x = %d y = %d\n", x, y); return 0; } 1 : The printf() function is called 10 times. 2 : The program will produce the output x = 10 y = 10 3 : The ; after the if(x!=y) will NOT produce an error. 4 : The program will not produce output.

A. 1
B. 2, 3
C. 3, 4
D. 4
Answer» C. 3, 4
Discussion
31.

Point out the error, if any in the program._x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int i = 1;_x000D_ switch(i)_x000D_ {_x000D_ case 1:_x000D_ printf("Case1");_x000D_ break;_x000D_ case 1*2+4:_x000D_ printf("Case2");_x000D_ break;_x000D_ }_x000D_ return 0;_x000D_ }

A. Error: in case 1*2+4 statement
B. Error: No default specified
C. Error: in switch statement
D. No Error
Answer» E.
Discussion
32.

Point out the error, if any in the program._x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int P = 10;_x000D_ switch(P)_x000D_ {_x000D_ case 10:_x000D_ printf("Case 1");_x000D_ _x000D_ case 20:_x000D_ printf("Case 2");_x000D_ break;_x000D_ _x000D_ case P:_x000D_ printf("Case 2");_x000D_ break;_x000D_ }_x000D_ return 0;_x000D_ }

A. Error: No default value is specified
B. Error: Constant expression required at line case P:
C. Error: There is no break statement in each case.
D. No error will be reported.
Answer» C. Error: There is no break statement in each case.
Discussion
33.

Which of the following errors would be reported by the compiler on compiling the program given below?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int a = 5;_x000D_ switch(a)_x000D_ {_x000D_ case 1:_x000D_ printf("First");_x000D_ _x000D_ case 2:_x000D_ printf("Second");_x000D_ _x000D_ case 3 + 2:_x000D_ printf("Third");_x000D_ _x000D_ case 5:_x000D_ printf("Final");_x000D_ break;_x000D_ _x000D_ }_x000D_ return 0;_x000D_ }

A. There is no break statement in each case.
B. Expression as in case 3 + 2 is not allowed.
C. Duplicate case case 5:
D. No error will be reported.
Answer» D. No error will be reported.
Discussion
34.

What will be the output of the program? #include int main() { char ch; if(ch = printf(")) printf("It matters\n"); else printf("It doesn't matters\n"); return 0; }

A. It matters
B. It doesn't matters
C. matters
D. No output
Answer» C. matters
Discussion
35.

What will be the output of the program, if a short int is 2 bytes wide?_x000D_ #include_x000D_ int main()_x000D_ {_x000D_ short int i = 0;_x000D_ for(i<=5 && i>=-1; ++i; i>0)_x000D_ printf("%u,", i);_x000D_ return 0;_x000D_ }

A. 1 ... 65535
B. Expression syntax error
C. No output
D. 0, 1, 2, 3, 4, 5
Answer» B. Expression syntax error
Discussion
36.

Which of the following statements are correct about an if-else statements in a C-program? 1: Every if-else statement can be replaced by an equivalent statements using   ?: operators 2: Nested if-else statements are allowed. 3: Multiple statements in an if block are allowed. 4: Multiple statements in an else block are allowed.

A. 1 and 2
B. 2 and 3
C. 1, 2 and 4
D. 2, 3, 4
Answer» E.
Discussion
37.

Point out the error, if any in the while loop._x000D_ #include_x000D_ int main()_x000D_ {_x000D_ int i=1;_x000D_ while()_x000D_ {_x000D_ printf("%d\n", i++);_x000D_ if(i>10)_x000D_ break;_x000D_ }_x000D_ return 0;_x000D_ }

A. There should be a condition in the while loop
B. There should be at least a semicolon in the while
C. The while loop should be replaced with for loop.
D. No error
Answer» B. There should be at least a semicolon in the while
Discussion
38.

Select the output for the following set of codes:

A. -127 to +127
B. 0 to 127
C. 1
D. Infinite loop condition
Answer» D. Infinite loop condition
Discussion
39.

For the incomplete program below, which of the code fragment will not result in an infinite loop:

A. do { j = j + (i % 10); }while ((i = i / 10)!= 0);
B. do { j = j + (i % 10); }while ((i / 10)!= 0);
C. do { j = j + (i % 10); }while ((i % 10)!= 0);
D. do { j = j + (i % 10); }while ((i/10 == 0)!= 0);
Answer» B. do { j = j + (i % 10); }while ((i / 10)!= 0);
Discussion
40.

Correct syntax for while statement is:

A. a
B. b
C. c
D. d
Answer» D. d
Discussion
41.

Predict the output for the following set of code :

A. B B zero A A A
B. B zero A A A
C. B B B zero A A A
D. A A A zero B B B
Answer» D. A A A zero B B B
Discussion
42.

Select the output for the set of code:

A. Hi Hello
B. Hi
C. Hello
D. Compile time error
Answer» E.
Discussion
43.

Correct syntax for do while loop is :

A. a
B. b
C. c
D. d
Answer» E.
Discussion
44.

Select the output for the following set of Code. Which of the following conditions are true ?

A. a ,b ,c
B. b ,c ,d
C. a ,d ,b
D. b ,c
Answer» E.
Discussion
45.

Select the correct ‘if statement’ to be filled in the given set of code :

A. a
B. b
C. c
D. d
Answer» D. d
Discussion
46.

Which of the following statements are correct about the C#.NET code snippet given below?if (age > 18 && no < 11) a = 25;1. The condition no < 11 will be evaluated only if age > 18 evaluates to True.2. The statement a = 25 will get executed if any one condition is True.3. The condition no < 11 will be evaluated only if age > 18 evaluates to False.4. The statement a = 25 will get executed if both the conditions are True.5. && is known as a short circuiting logical operator.

A. 1, 3
B. 2, 5
C. 1, 4, 5
D. 3, 4, 5
Answer» D. 3, 4, 5
Discussion
47.

What is the output for the following code ?

A. Rahul Dravid
B. Sachin Tendulkar
C. Ms Dhoni
D. Warning : Unreachable Code
Answer» C. Ms Dhoni
Discussion
48.

Which of the following statements are correct about the C#.NET code snippet given below?if (age > 18 || no < 11) a = 25;1. The condition no < 11 will get evaluated only if age > 18 evaluates to False.2. The condition no < 11 will get evaluated if age > 18 evaluates to True.3. The statement a = 25 will get evaluated if any one one of the two conditions is True.4. || is known as a short circuiting logical operator.5. The statement a = 25 will get evaluated only if both the conditions are True.

A. 1, 4, 5
B. 2, 4
C. 1, 3, 4
D. 2, 3, 5
Answer» D. 2, 3, 5
Discussion
49.

Which of the following statements are correct?1. The switch statement is a control statement that handles multiple selections and enumerations by passing control to one of the case statements within its body.2. The goto statement passes control to the next iteration of the enclosing iteration statement in which it appears.3. Branching is performed using jump statements which cause an immediate transfer of the program control.4. A common use of continue is to transfer control to a specific switch-case label or the default label in a switch statement.5. The do statement executes a statement or a block of statements enclosed in {} repeatedly until a specified expression evaluates to false.

A. 1, 2, 4
B. 1, 3, 5
C. 2, 3, 4
D. 3, 4, 5
Answer» C. 2, 3, 4
Discussion
50.

Which of the following is another way to rewrite the code snippet given below?

A. int a = 1, b = 2, c = 0;c = a < b ? a : 0;
B. int a = 1, b = 2, c = 0;a < b ? c = a : c = 0;
C. int a = 1, b = 2, c = 0;a < b ? c = a : c = 0 ? 0 : 0;
D. int a = 1, b = 2, c = 0;a < b ? return (c): return (0);
Answer» B. int a = 1, b = 2, c = 0;a < b ? c = a : c = 0;
Discussion