Notesala

1. What is the size of an int in C?

2 bytes

4 bytes

8 bytes

Depends on compiler

2. Which of the following is a valid variable name in C?

1stName

first_name

first-name

first.name

3. What is the output of printf("%d", 5 + 10);?

15

510

5 + 10

None of the above

4. Which of the following is the correct way to declare a pointer?

int* ptr;

int ptr*;

ptr int*;

*int ptr;

5. What is the purpose of the main() function in C?

Start of program

End of program

A user-defined function

None of the above

6. Which operator is used to access a member of a structure?

.

->

*

&

7. How do you create a comment in C?

// comment

/* comment */

Both A and B

None of the above

8. What is the result of 3 % 2 in C?

0

1

1.5

2

9. Which data type can hold a decimal value?

int

char

float

all of the above

10. What will be the output of printf("%c", 'A' + 1);?

A

B

C

Error

11. Which of the following is a looping statement in C?

for

if

switch

goto

12. What does the sizeof operator do?

Returns the size of a variable

Returns the number of elements

Returns memory address

None of the above

13. What is the output of the following code? printf("%d", 5 < 10);

0

1

5

10

14. What is the correct way to declare an array in C?

int arr[];

arr int[];

int[] arr;

int arr();

15. Which of the following functions is used to read a string?

scanf

gets

fgets

All of the above

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

To return a value from a function

To exit the program

To declare a function

None of the above

17. Which header file is needed for using printf and scanf?

<stdio.h>

<stdlib.h>

<conio.h>

<string.h>

18. How do you declare a function in C?

void function();

function void();

void function;

function void

19. What is the output of printf("%d", 3 * 2 + 1);?

7

8

6

5

20. What is a NULL pointer?

A pointer with no address

A pointer with an address

A pointer that points to zero

A pointer to a function

21. Which of the following is not a keyword in C?

for

while

repeat

if

22. What is the correct syntax for an if statement in C?

if x > 0 {

if (x > 0)

if x > 0

if [x > 0]

23. Which operator is used to allocate memory dynamically?

new

malloc

alloc

memory

24. What does the break statement do?

Ends the program

Exits a loop

Exits a function

None of the above

25. Which of the following statements is used to terminate a loop?

exit

break

continue

stop

26. What will be the output of printf("%d", 5 == 5);?

0

1

5

Error

27. What is the use of the & operator?

To declare a variable

To get the address of a variable

To assign a value

To perform bitwise AND

28. What will happen if you try to access an array element out of bounds?

Undefined behavior

Compiler error

Accessing memory

None of the above

29. What is the output of printf("%d", 3 + 2 * 2);?

7

10

8

9

30. Which of the following is a logical operator in C?

&&

&

nan

31. How do you include a standard library in C?

#include <library>

include <library>

#include library

#library <library>

32. What will be the output of printf("%d", (5 + 10) / 3);?

5

15

3

4

33. Which of the following data types can store the largest value?

int

long

short

char

34. How can you declare a constant variable in C?

const int x;

int const x;

#define x;

All of the above

35. What is the output of printf("%f", 5.0 / 2);?

2

2.5

2

2.5

36. Which function is used to find the length of a string?

strlen

size

length

strlength

37. How can you create a multi-dimensional array?

int arr[3][4];

arr int[3][4];

int arr[][4][3];

int[3][4] arr;

38. What is the output of printf("%d", sizeof(char));?

1

2

4

8

39. What is the keyword used for defining a macro in C?

macro

def

define

const

40. Which of the following will declare a structure in C?

struct name {}

struct name;

struct name[];

None of the above

41. What is the output of printf("%c", 65);?

A

65

Error

nan

42. How do you declare a function pointer in C?

int (*ptr)();

int ptr();

(*int ptr)();

int *ptr();

43. What is the output of the following code? printf("%d", 5 / 2);

2

2.5

2

Error

44. What does malloc return if memory allocation fails?

nan

0

-1

nan

45. What is the default return type of a function in C?

void

int

char

nan

46. Which of the following is an invalid C declaration?

int x;

float y;

char z;

int;

47. What will be the output of the following code? printf("%d", sizeof(int));

2

4

8

nan

48. How do you access a member of a union?

.

->

*

Both A and B

49. Which of the following is not a valid C statement?

x = 5;

5 = x;

x += 10;

x++;

50. What is the output of printf("%d", 10 / 4);

2

2.5

2

2.5

51. What is the correct way to write an else statement?

else {

else:

else() {

else

52. What will happen if you divide an integer by zero in C?

Runtime error

Undefined behavior

Zero value

nan

53. How can you declare a character array in C?

char arr[];

char arr[10];

Both A and B

None of the above

54. What is the output of the following code? printf("%d", 0);

0

1

nan

Error

55. Which of the following correctly declares a string in C?

char str[] = "Hello";

string str = "Hello";

char str = "Hello";

char[] str = "Hello";

56. What is the size of a float in C?

2 bytes

4 bytes

8 bytes

Depends on compiler

57. What is the result of 3 & 1 in C?

0

1

2

3

58. Which of the following functions can be used to terminate a string?

strlen

strncat

strcat

nan

59. Which of the following is used to declare a structure variable?

struct var;

struct var{};

struct var[];

struct var();

60. What is the output of printf("%d", 10 == 10);

0

1

10

Error

61. How do you define a constant value in C?

const int x = 10;

int const x = 10;

#define x 10;

All of the above

62. What will be the output of printf("%d", 10 / 3);

3

3.33

3

3.3

63. What is a function prototype?

A declaration of a function

A function definition

A function call

nan

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

nan

65. What will be the output of the following code? printf("%d", 5 - 2);

2

3

5

7

66. What is the result of 5 >> 1 in C?

2

3

4

5

67. What is the correct syntax for declaring a structure?

struct name {};

struct name { }

struct { name };

Both A and B

68. Which of the following correctly defines a macro?

#define PI 3.14

#PI 3.14

define PI 3.14

#define PI = 3.14

69. What will be the output of printf("%d", sizeof(double));

4

8

16

Depends on compiler

70. How can you declare a variable in C that can hold 10 integers?

int arr[10];

int arr();

int[10] arr;

int arr(10);

71. What does fgets do in C?

Reads a string

Writes a string

Displays a string

nan

72. What is the output of printf("%d", 5 + 5);

10

5

15

nan

73. Which of the following is not a loop in C?

for

while

repeat

do-while

74. What is a syntax error?

An error in logic

An error in syntax

An error in memory

nan

75. What does the continue statement do?

Ends the program

Skips the current iteration

Exits the loop

nan

76. What is the output of printf("%d", 3 * (2 + 1));

6

7

9

10

77. How do you define a function that takes two integer arguments?

void function(int a, int b);

void function(a, b);

function int(a, b);

int function(int a, int b);

Unit 4: Programming in C (12 Hours)

1. What is the size of an int in C?

2. Which of the following is a valid variable name in C?

3. What is the output of printf("%d", 5 + 10);?

4. Which of the following is the correct way to declare a pointer?

5. What is the purpose of the main() function in C?

6. Which operator is used to access a member of a structure?

7. How do you create a comment in C?

8. What is the result of 3 % 2 in C?

9. Which data type can hold a decimal value?

10. What will be the output of printf("%c", 'A' + 1);?

11. Which of the following is a looping statement in C?

12. What does the sizeof operator do?

13. What is the output of the following code? printf("%d", 5 < 10);

14. What is the correct way to declare an array in C?

15. Which of the following functions is used to read a string?

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

17. Which header file is needed for using printf and scanf?

18. How do you declare a function in C?

19. What is the output of printf("%d", 3 * 2 + 1);?

20. What is a NULL pointer?

21. Which of the following is not a keyword in C?

22. What is the correct syntax for an if statement in C?

23. Which operator is used to allocate memory dynamically?

24. What does the break statement do?

25. Which of the following statements is used to terminate a loop?

26. What will be the output of printf("%d", 5 == 5);?

27. What is the use of the & operator?

28. What will happen if you try to access an array element out of bounds?

29. What is the output of printf("%d", 3 + 2 * 2);?

30. Which of the following is a logical operator in C?

31. How do you include a standard library in C?

32. What will be the output of printf("%d", (5 + 10) / 3);?

33. Which of the following data types can store the largest value?

34. How can you declare a constant variable in C?

35. What is the output of printf("%f", 5.0 / 2);?

36. Which function is used to find the length of a string?

37. How can you create a multi-dimensional array?

38. What is the output of printf("%d", sizeof(char));?

39. What is the keyword used for defining a macro in C?

40. Which of the following will declare a structure in C?

41. What is the output of printf("%c", 65);?

42. How do you declare a function pointer in C?

43. What is the output of the following code? printf("%d", 5 / 2);

44. What does malloc return if memory allocation fails?

45. What is the default return type of a function in C?

46. Which of the following is an invalid C declaration?

47. What will be the output of the following code? printf("%d", sizeof(int));

48. How do you access a member of a union?

49. Which of the following is not a valid C statement?

50. What is the output of printf("%d", 10 / 4);

51. What is the correct way to write an else statement?

52. What will happen if you divide an integer by zero in C?

53. How can you declare a character array in C?

54. What is the output of the following code? printf("%d", 0);

55. Which of the following correctly declares a string in C?

56. What is the size of a float in C?

57. What is the result of 3 & 1 in C?

58. Which of the following functions can be used to terminate a string?

59. Which of the following is used to declare a structure variable?

60. What is the output of printf("%d", 10 == 10);

61. How do you define a constant value in C?

62. What will be the output of printf("%d", 10 / 3);

63. What is a function prototype?

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

65. What will be the output of the following code? printf("%d", 5 - 2);

66. What is the result of 5 >> 1 in C?

67. What is the correct syntax for declaring a structure?

68. Which of the following correctly defines a macro?

69. What will be the output of printf("%d", sizeof(double));

70. How can you declare a variable in C that can hold 10 integers?

71. What does fgets do in C?

72. What is the output of printf("%d", 5 + 5);

73. Which of the following is not a loop in C?

74. What is a syntax error?

75. What does the continue statement do?

76. What is the output of printf("%d", 3 * (2 + 1));

77. How do you define a function that takes two integer arguments?

Results