C Programming Mcqs

This comprehensive set of C Programming MCQs is designed to cover all essential topics required for success in exams related to programming and software development using the C language. Focused on key subjects such as data types, control structures, functions, pointers, memory management, and file handling, these MCQs are crafted to help students build a strong foundation in C programming concepts and techniques.

Who should practice C Programming MCQs?

Students preparing for courses in computer science, software engineering, or IT that cover the C programming language.
Individuals aiming to strengthen their understanding of C programming fundamentals, including arrays, structures, functions, and dynamic memory allocation.
Candidates preparing for competitive exams or certifications that assess knowledge of C language programming and problem-solving.
Learners interested in mastering advanced topics such as recursion, pointers, file I/O, and bitwise operations in C.
Professionals focused on improving their skills in low-level programming, embedded systems, or systems programming using C.
Suitable for all aspirants seeking to enhance their knowledge and performance in C programming for academic or professional success.

1. Which of the following statements can be interpreted in multiple ways?

a) Vagueness
b) Comments
c) Contradictions
d) Ambiguities

View Answer

Explanation: Ambiguities refer to statements or expressions that can be interpreted in multiple ways, causing confusion or multiple possible meanings.

2. Which of the following is the correct syntax for a for loop in C?

a) for (int i = 0; i < 10; i++) { /* code */ }
b) for int i = 0; i < 10; i++ { /* code */ }
c) for (i = 0; i < 10; i++) { /* code */ }
d) for (int i = 0; i < 10; ++i) { /* code */ }

View Answer

Explanation: The correct syntax for a for loop in C includes the initialization, condition, and increment/decrement expressions inside parentheses, followed by a code block in braces.

3. What is the output of the following code?

#include <stdio.h>

int main() {
int x = 5;
printf("%d\n", x++);
return 0;
}

a) 5
b) 6
c) Compilation error
d) 0

View Answer

Explanation: The x++ operation prints the value of x before incrementing, so the output is 5.

4. Which of the following correctly defines a function in C?

a) int func(int x) { return x; }
b) int func x { return x; }
c) func(int x) { int x; }
d) function int func(int x) { return x; }

View Answer

Explanation: Option A correctly defines a function with a return type, parameter, and body.

5. What does the following code segment do?

int a = 10;
int b = 20;
a = b;
b = a;

a) Swaps the values of a and b
b) Sets a and b to the same value
c) Resets b to its initial value
d) Causes a compile-time error

View Answer

Explanation: After the assignment, a and b both have the same value, 20.

6. Which of the following is used to include a standard library in C?

a) #include <stdio.h>
b) import <stdio.h>
c) include <stdio.h>
d) require <stdio.h>

View Answer

Explanation: #include <stdio.h> is used to include the standard input-output library in C.

7. How do you declare a constant variable in C?

a) const int x = 10;
b) int const x = 10;
c) constant int x = 10;
d) const x = 10;

View Answer

Explanation: Both const int x = 10; and int const x = 10; are valid ways to declare a constant variable.

8. What is the purpose of the return statement in C?

a) To exit the program
b) To output a value to the console
c) To return a value from a function
d) To terminate a loop

View Answer

Explanation: The return statement is used to return a value from a function to its caller.

9. What will be the result of the following expression?

int x = 3;
int y = 4;
int z = x > y ? x : y;

a) 3
b) 4
c) 7
d) 0

View Answer

Explanation: The ternary operator ? returns y because x > y is false.

10. What does the sizeof operator do in C?

a) Returns the size of a variable or data type in bytes
b) Returns the number of elements in an array
c) Returns the length of a string
d) Returns the size of the memory allocated

View Answer

Explanation: size of returns the size of a variable or data type in bytes.

11. Which of the following is a correct way to declare an array in C?

a) int arr[10];
b) int arr(10);
c) int arr = [10];
d) array int arr[10];

View Answer

Explanation: int arr[10]; is the correct way to declare an array of 10 integers.

12. What is the result of the following code snippet?

int a = 2;
int b = 3;
int c = a * b + 5;

a) 11
b) 8
c) 6
d) 7

View Answer

Explanation: The expression evaluates to 2 * 3 + 5, which is 11.

13. How do you declare a pointer to an integer in C?

a) int *ptr;
b) int ptr*;
c) pointer int ptr;
d) int &ptr;

View Answer

Explanation: int *ptr; correctly declares a pointer to an integer.

14. What will be the output of the following code?

#include <stdio.h>

int main() {
int i = 10;
printf("%d\n", ++i);
return 0;
}

a) 10
b) 11
c) 9
d) 0

View Answer

Explanation: The ++i operation increments i before printing, so the output is 11.

15. Which function is used to allocate memory dynamically in C?

a) malloc()
b) alloc()
c) new()
d) free()

View Answer

Explanation: malloc() is used to allocate memory dynamically in C.

16. What will be the result of the following code?

#include <stdio.h>

int main() {
int arr[3] = {1, 2, 3};
printf("%d\n", arr[2]);
return 0;
}

a) 1
b) 2
c) 3
d) Compilation error

View Answer

Explanation: arr[2] accesses the third element of the array, which is 3.

17. What is the output of this code snippet?

#include <stdio.h>

int main() {
int a = 5;
int b = 3;
printf("%d\n", a / b);
return 0;
}

a) 1
b) 1.66
c) 2
d) 3

View Answer

Explanation: The division of integers results in an integer. 5 / 3 evaluates to 1.

18. How do you declare a float variable in C?

a) float num;
b) num float;
c) float num = 0;
d) float num = 0.0;

View Answer

Explanation: float num; is the correct syntax for declaring a float variable.

19. What is the purpose of the break statement in C?

a) To exit from a loop or switch statement
b) To pause the execution of a program
c) To jump to a specific part of code
d) To end the program execution

View Answer

Explanation: The break statement is used to exit from a loop or switch statement prematurely.

20. Which of the following correctly defines a struct in C?

a) struct Person { char name[50]; int age; };
b) struct Person { name[50] char; age int; };
c) Person { char name[50]; int age; };
d) struct Person { char name; int age; };

View Answer

Explanation: struct Person { char name[50]; int age; }; is the correct way to define a struct in C.

21. How do you access members of a structure in C?

a) Using the . operator
b) Using the -> operator
c) Using the & operator
d) Using the * operator

View Answer

Explanation: Structure members are accessed using the . operator for structure variables and -> for structure pointers.

22. What is the output of the following code?

#include <stdio.h>

int main() {
int a = 5;
int b = 10;
printf("%d\n", a == b);
return 0;
}

a) 1
b) 0
c) 5
d) 10

View Answer

Explanation: a == b is false, so the output is 0.

23. What will the following code print?

#include <stdio.h>

int main() {
int a = 4;
int b = 2;
int result = a % b;
printf("%d\n", result);
return 0;
}

a) 2
b) 1
c) 0
d) 4

View Answer

Explanation: a % b calculates the remainder of 4 / 2, which is 0.

24. Which operator is used to perform logical AND operation in C?

a) &&
b) &
c) |
d) ||

View Answer

Explanation: && is the logical AND operator in C.

25. What is the output of the following code?

#include <stdio.h>

int main() {
int i = 0;
while (i < 5) {
printf("%d ", i);
i++;
}
return 0;
}

a) 0 1 2 3 4
b) 1 2 3 4 5
c) 0 1 2 3 4 5
d) 1 2 3 4

View Answer

Explanation: The while loop prints values from 0 to 4.

26. What does the continue statement do in a loop?

a) Skips the current iteration and proceeds with the next iteration
b) Exits the loop
c) Breaks the loop
d) Restarts the loop

View Answer

Explanation: continue skips the rest of the current loop iteration and proceeds with the next iteration.

27. How do you define a macro in C?

a) #define NAME value
b) define NAME value
c) macro NAME = value
d) #macro NAME value

View Answer

Explanation: #define NAME value is the correct way to define a macro in C.

28. What is the output of the following code?

#include <stdio.h>

int main() {
printf("%c\n", 'A' + 1);
return 0;
}

a) ‘A’
b) ‘B’
c) ‘C’
d) 66

View Answer

Explanation: ‘A’ + 1 results in ‘B’ because ‘A’ has an ASCII value of 65.

29. Which keyword is used to define a constant in C?

a) const
b) static
c) final
d) immutable

View Answer

Explanation: The const keyword is used to define a constant in C.

30. What is the default return type of a function in C if not specified?

a) void
b) int
c) char
d) float

View Answer

Explanation: The default return type of a function in C is int if not specified.

31. Which function is used to read a string from the console?

a) scanf()
b) printf()
c) fgets()
d) gets()

View Answer

Explanation: scanf() can be used to read a string from the console, although fgets() is preferred for safety reasons.

32. How do you declare a two-dimensional array in C?

a) int arr[3][4];
b) int arr(3, 4);
c) int arr[3, 4];
d) int arr[3][4][];

View Answer

Explanation: int arr[3][4]; is the correct way to declare a two-dimensional array in C.

33. What will be the output of the following code?

#include <stdio.h>

int main() {
int a = 10;
int b = 20;
a += b;
printf("%d\n", a);
return 0;
}

a) 10
b) 20
c) 30
d) 40

View Answer

Explanation: a += b adds b to a, so a becomes 30.

34. Which of the following is used to access a variable from another file?

a) extern
b) static
c) auto
d) register

View Answer

Explanation: extern is used to declare a variable that is defined in another file.

35. What does the sizeof operator return when applied to an array?

a) The size of the array in bytes
b) The number of elements in the array
c) The size of the first element of the array
d) The total memory allocated for the array

View Answer

Explanation: sizeof applied to an array returns the total size of the array in bytes.

36. What will be the output of this code snippet?

#include <stdio.h>

int main() {
int x = 2;
int y = 3;
printf("%d\n", x * y++);
return 0;
}

a) 6
b) 7
c) 9
d) 5

View Answer

Explanation: y++ uses the value of y before incrementing, so x * y is 2 * 3, which is 6.

37. Which operator is used to perform bitwise OR in C?

a) |
b) ||
c) &
d) ^

View Answer

Explanation: | is used for bitwise OR operation in C.

38. What is the result of the following expression?

int x = 5;
int y = 10;
int z = (x < y) && (y > 5);

a) 0
b) 1
c) 5
d) 10

View Answer

Explanation: Both conditions (x < y) and (y > 5) are true, so the result of && is 1.

39. Which header file is required for using malloc() and free() functions?

a) stdlib.h
b) stdio.h
c) string.h
d) math.h

View Answer

Explanation: stdlib.h is the header file that includes declarations for malloc() and free() functions.

40. What is the output of this code snippet?

#include <stdio.h>

int main() {
int x = 4;
printf("%d\n", x--);
return 0;
}

a) 3
b) 4
c) 5
d) 0

View Answer

Explanation: The x– operation prints the value of x before decrementing, so the output is 4.

41. What is the result of the following code?

#include <stdio.h>

int main() {
int x = 3;
int y = x * 2 + 1;
printf("%d\n", y);
return 0;
}

a) 6
b) 7
c) 8
d) 9

View Answer

Explanation: x * 2 + 1 calculates to 3 * 2 + 1, which is 7.

42. What will be the output of this code snippet?

#include <stdio.h>

int main() {
int a = 2;
int b = 5;
printf("%d\n", a * (b - 1));
return 0;
}

a) 8
b) 10
c) 9
d) 7

View Answer

Explanation: The expression evaluates to 2 * (5 – 1), which is 8.

43. What is the correct syntax for a switch statement in C?

a) switch (expression) { case value: // code break; }
b) switch expression { case value: // code }
c) switch { expression case value: // code; }
d) switch (expression) { case value // code; break; }

View Answer

Explanation: Option A is the correct syntax for a switch statement in C.

44. How do you declare a char variable in C?

a) char ch;
b) char ch = ‘a’;
c) char ch = 0;
d) All of the above

[

expand title=”View Answer”]D

Explanation: All given options are valid ways to declare a char variable in C.[/expand]

45. What is the output of this code?

#include <stdio.h>

int main() {
int x = 3;
int y = 4;
printf("%d\n", x + y * 2);
return 0;
}

a) 11
b) 14
c) 10
d) 7

View Answer

Explanation: The expression evaluates to 3 + 4 * 2, which is 11 due to operator precedence.

46. Which of the following is a valid identifier in C?

a) int variable_name;
b) int 2variable;
c) int variable-name;
d) int variable name;

View Answer

Explanation: variable_name is a valid identifier. Identifiers cannot start with a digit or contain special characters other than _.

47. What does the & operator do in C?

a) Bitwise AND
b) Logical AND
c) Bitwise OR
d) Logical OR

View Answer

Explanation: & is used for bitwise AND operation in C.

48. How do you declare a constant integer in C?

a) const int x = 10;
b) int x = 10 const;
c) int const x = 10;
d) Both A and C

View Answer

Explanation: Both const int x = 10; and int const x = 10; are valid ways to declare a constant integer.

49. What is the output of the following code snippet?

#include <stdio.h>

int main() {
int x = 3;
int y = ++x * 2;
printf("%d\n", y);
return 0;
}

a) 6
b) 7
c) 8
d) 9

View Answer

Explanation: ++x increments x to 4, so 4 * 2 results in 8.

50. What is the correct way to define a float array in C?

a) float arr[10];
b) float arr(10);
c) float arr = [10];
d) float array[10];

View Answer

Explanation: float arr[10]; is the correct way to define a float array of 10 elements in C.

51. What will be the result of the following code?

#include <stdio.h>

int main() {
int a = 5;
int b = 2;
int c = a / b;
printf("%d\n", c);
return 0;
}

a) 2
b) 2.5
c) 3
d) 0

View Answer

Explanation: Integer division truncates the decimal part, so 5 / 2 results in 2.

52. What is the purpose of the default keyword in a switch statement?

a) Provides a default case if no other case matches
b) Exits from the switch statement
c) Defines the first case in a switch statement
d) Declares a switch statement

View Answer

Explanation: The default keyword is used to specify a default case that is executed if no other cases match.

53. Which of the following is not a valid C data type?

a) int
b) float
c) double
d) text

View Answer

Explanation: text is not a valid C data type. Valid types include int, float, and double.

54. What will be the result of the following code?

#include <stdio.h>

int main() {
int x = 4;
int y = 5;
printf("%d\n", x > y ? x : y);
return 0;
}

a) 4
b) 5
c) 9
d) 0

View Answer

Explanation: The ternary operator returns y because x > y is false.

55. What is the output of this code?

#include <stdio.h>

int main() {
int x = 3;
int y = 2;
int z = x + y * 2;
printf("%d\n", z);
return 0;
}

a) 7
b) 8
c) 9
d) 6

View Answer

Explanation: The expression evaluates to 3 + 2 * 2, which is 7 due to operator precedence.

56. Which of the following is a valid way to comment in C?

a) /* This is a comment */
b) // This is a comment
c) # This is a comment
d) — This is a comment

View Answer

Explanation: Both /* */ and // are valid ways to comment in C.

57. What does the return 0; statement do in the main() function?

a) Indicates that the program has completed successfully
b) Exits the program with an error
c) Restarts the main() function
d) Causes a syntax error

View Answer

Explanation: return 0; indicates that the program has completed successfully and returns control to the operating system.

58. What will be the result of the following code?

#include <stdio.h>

int main() {
int a = 7;
int b = 5;
printf("%d\n", a % b);
return 0;
}

a) 1
b) 2
c) 7
d) 5

View Answer

Explanation: a % b calculates the remainder of 7 / 5, which is 2.

59. How do you declare a variable that can hold a large integer in C?

a) long int
b) big int
c) large int
d) int64

View Answer

Explanation: long int is used to declare a variable that can hold a larger integer value in C.

60. What is the purpose of the static keyword in C?

a) To restrict the visibility of a variable or function to its file
b) To allocate memory dynamically
c) To define a global variable
d) To declare a variable as a constant

View Answer

Explanation: static restricts the visibility of a variable or function to its file or function scope.

61. What does the continue statement do inside a loop?

a) Skips the rest of the current iteration and proceeds with the next iteration
b) Ends the loop execution
c) Breaks out of the loop
d) Exits the loop and the program

View Answer

Explanation: The continue statement skips the remaining code in the current loop iteration and moves to the next iteration.

62. How do you include a user-defined header file in C?

a) #include “header.h”
b) #include <header.h>
c) #import “header.h”
d) #require “header.h”

View Answer

Explanation: #include “header.h” is used to include a user-defined header file.

63. What will be the output of this code snippet?

#include <stdio.h>

int main() {
int a = 4;
int b = 2;
printf("%d\n", a * (b + 2));
return 0;
}

a) 12
b) 8
c) 14
d) 10

View Answer

Explanation: The expression evaluates to 4 * (2 + 2), which is 12.

64. What does the ++ operator do in C?

a) Increments a variable’s value by 1
b) Decrements a variable’s value by 1
c) Multiplies a variable’s value by 2
d) Divides a variable’s value by 2

View Answer

Explanation: The ++ operator increments a variable’s value by 1.

65. Which keyword is used to define a function prototype in C?

a) void
b) extern
c) static
d) typedef

View Answer

Explanation: The extern keyword is used to declare a function prototype in C, indicating that the function is defined elsewhere.

66. What is the output of the following code snippet?

#include <stdio.h>

int main() {
int x = 5;
printf("%d\n", x-- - 1);
return 0;
}

a) 4
b) 5
c) 6
d) 3

View Answer

Explanation: x– uses the value of x before decrementing, so 5 – 1 is 4.

67. Which operator is used for pointer arithmetic in C?

a) +
b) –
c) *
d) All of the above

View Answer

Explanation: All listed operators can be used for pointer arithmetic in C, including +, -, and *.

68. How do you convert an integer to a float in C?

a) float
b) float(x)
c) x.float
d) static_cast<float>(x)

View Answer

Explanation: The correct way to convert an integer to a float in C is by using type casting with float.

69. What will be the result of the following code?

#include <stdio.h>

int main() {
int x = 6;
int y = x % 3;
printf("%d\n", y);
return 0;
}

a) 1
b) 2
c) 0
d) 3

View Answer

Explanation: x % 3 calculates the remainder of 6 / 3, which is 0.

70. Which of the following is the correct way to declare a float variable in C?

a) float f;
b) float f = 1.0;
c) float f = 0.0;
d) All of the above

View Answer

Explanation: All options are valid ways to declare a float variable in C.

71. What is the output of the following code snippet?

#include <stdio.h>

int main() {
int x = 10;
int y = 5;
printf("%d\n", x / y);
return 0;
}

a) 2
b) 5
c) 10
d) 15

View Answer

Explanation: x / y calculates to 10 / 5, which is 2.

72. What will be the result of the following code snippet?

#include <stdio.h>

int main() {
int x = 10;
int y = x % 4;
printf("%d\n", y);
return 0;
}

a) 2
b) 0
c) 1
d) 3

View Answer

Explanation: x % 4 calculates the remainder of 10 / 4, which is 2.

73. What is the output of the following code snippet?

#include <stdio.h>

int main() {
int a = 6;
int b = 2;
printf("%d\n", a / b * 2);
return 0;
}

a) 6
b) 8
c) 4
d) 12

View Answer

Explanation: The expression evaluates to 6 / 2 * 2, which is 6 due to operator precedence.

74. How do you declare a variable that can hold a decimal number in C?

a) float
b) decimal
c) number
d) int

View Answer

Explanation: float is used to declare a variable that can hold a decimal number in C.

75. What is the result of the following code snippet?

#include <stdio.h>

int main() {
int x = 9;
int y = x / 4;
printf("%d\n", y);
return 0;
}

a) 1
b) 2
c) 3
d) 4

View Answer

Explanation: x / 4 calculates to 9 / 4, which is 2 with integer division.

76. What is the correct syntax for defining a function in C?

a) returnType functionName(parameters) { // code }
b) functionName(parameters) { // code }
c) returnType functionName { // code }
d) functionName returnType(parameters) { // code }

View Answer

Explanation: The correct syntax for defining a function in C is returnType functionName(parameters) { // code }.

77. Which of the following is used to allocate memory dynamically in C?

a) malloc()
b) alloc()
c) memory()
d) new()

View Answer

Explanation: malloc() is used to allocate memory dynamically in C.

78. What is the output of the following code snippet?

#include <stdio.h>

int main() {
int x = 7;
printf("%d\n", x++);
return 0;
}

a) 7
b) 8
c) 6
d) 9

View Answer

Explanation: x++ prints the value of x before incrementing, so the output is 7.

79. What is the correct way to comment out a block of code in C?

a) /* This is a block comment */
b) // This is a block comment
c) # This is a block comment
d) — This is a block comment

View Answer

Explanation: The /* */ syntax is used to comment out a block of code in C.

80. Which of the following operators has the highest precedence in C?

a) *
b) +
c) =
d) ++

View Answer

Explanation: The ++ operator (increment) has the highest precedence among the operators listed.

81. What is the output of this code snippet?

#include <stdio.h>

int main() {
int x = 5;
int y = 2;
printf("%d\n", x % y);
return 0;
}

a) 1
b) 2
c) 0
d) 5

View Answer

Explanation: x % y calculates the remainder of 5 / 2, which is 1.

82. What does the #include <stdio.h> directive do in C?

a) Includes the standard input/output library
b) Includes user-defined functions
c) Includes the math library
d) Includes the string manipulation library

View Answer

Explanation: #include <stdio.h> includes the standard input/output library which provides functions like printf and scanf.

83. What will be the result of the following code snippet?

#include <stdio.h>

int main() {
int a = 3;
int b = 4;
printf("%d\n", a + b * 2);
return 0;
}

a) 10
b) 11
c) 14
d) 7

View Answer

Explanation: The expression evaluates to 3 + 4 * 2, which is 11 due to operator precedence.

84. Which function is used to find the length of a string in C?

a) strlen()
b) strlength()
c) length()
d) size()

View Answer

Explanation: strlen() is used to find the length of a string in C.

85. What is the result of the following code?

#include <stdio.h>

int main() {
int x = 8;
int y = x / 3;
printf("%d\n", y);
return 0;
}

a) 2
b) 3
c) 4
d) 1

View Answer

Explanation: x / 3 calculates to 8 / 3, which is 2 with integer division.

86. How do you declare a pointer to an integer in C?

a) int *ptr;
b) int ptr*;
c) pointer int;
d) int &ptr;

View Answer

Explanation: int *ptr; declares a pointer to an integer in C.

87. What does the break statement do in a loop?

a) Exits the loop
b) Continues to the next iteration
c) Restarts the loop
d) Exits the loop and the program

View Answer

Explanation: The break statement exits the loop immediately.

88. What is the output of the following code?

#include <stdio.h>

int main() {
int x = 10;
int y = 3;
printf("%d\n", x / y);
return 0;
}

a) 3
b) 4
c) 10
d) 30

View Answer

Explanation: x / y calculates to 10 / 3, which is 3 with integer division.

89. What is the correct syntax to declare an array of 5 integers in C?

a) int arr[5];
b) int arr(5);
c) int arr = [5];
d) int arr[5] = {0};

View Answer

Explanation: int arr[5]; is the correct syntax to declare an array of 5 integers in C.

90. What is the purpose of the sizeof operator in C?

a) Determines the size of a data type or variable
b) Allocates memory dynamically
c) Defines the size of an array
d) Compares the size of two variables

View Answer

Explanation: The sizeof operator is used to determine the size of a data type or variable in bytes.

91. What is the result of the following code snippet?

#include <stdio.h>

int main() {
int x = 4;
int y = x++;
printf("%d\n", y);
return 0;
}

a) 4
b) 5
c) 6
d) 3

View Answer

Explanation: x++ uses the value of x before incrementing, so y is 4 and then x becomes 5.

92. What is the correct syntax for defining a struct in C?

a) struct StructName { // members };
b) struct { // members } StructName;
c) StructName struct { // members };
d) struct StructName;

View Answer

Explanation: The correct syntax for defining a struct in C is struct StructName { // members };.

93. What is the output of the following code snippet?

#include <stdio.h>

int main() {
int x = 7;
int y = 4;
printf("%d\n", x / y);
return 0;
}

a) 1
b) 2
c) 3
d) 4

View Answer

Explanation: x / y calculates to 7 / 4, which is 1 with integer division.

94. What is the purpose of the continue statement in C?

a) Skips the remaining code in the current iteration and proceeds to the next iteration of the loop
b) Exits the loop
c) Restarts the loop
d) Exits the loop and the program

View Answer

Explanation: The continue statement skips the remaining code in the current iteration of the loop and proceeds with the next iteration.

95. What is the correct way to initialize an integer array with values in C?

a) int arr[] = {1, 2, 3, 4};
b) int arr[4] = {1, 2, 3, 4};
c) int arr = {1, 2, 3, 4};
d) int arr[4] = (1, 2, 3, 4);

View Answer

Explanation: int arr[4] = {1, 2, 3, 4}; is the correct way to initialize an integer array with values in C.

96. What will be the result of the following code snippet?

#include <stdio.h>

int main() {
int x = 5;
printf("%d\n", ++x * 2);
return 0;
}

a) 10
b) 12
c) 11
d) 20

View Answer

Explanation: ++x increments x to 6, so 6 * 2 results in 12.

97. Which of the following is used to handle errors in C?

a) error()
b) assert()
c) debug()
d) exception()

View Answer

Explanation: assert() is used to handle errors in C by verifying assumptions made by the program.

98. What is the output of the following code snippet?

#include <stdio.h>

int main() {
int x = 5;
int y = 10;
printf("%d\n", x * y / 5);
return 0;
}

a) 10
b) 5
c) 50
d) 20

View Answer

Explanation: x * y / 5 calculates to 5 * 10 / 5, which is 10.

99. How do you declare a constant float in C?

a) const float x = 10.0;
b) float const x = 10.0;
c) const float x = 10.0f;
d) Both A and B

View Answer

Explanation: Both const float x = 10.0; and float const x = 10.0; are valid ways to declare a constant float in C.

100. What is the output of the following code snippet?

#include <stdio.h>

int main() {
int x = 2;
int y = 3;
printf("%d\n", x * y + y);
return 0;
}

a) 5
b) 6
c) 9
d) 11

View Answer

Explanation: x * y + y calculates to 2 * 3 + 3, which is 9.