c programming mcq with answers

Multiple Choice Questions with Correct Answers s:-

1. Who is father of C Language?

A. Bjarne Stroustrup

B. Dennis Ritchie

C. James A. Gosling

D. Dr. E.F. Codd

Correct Answers : B

2. C Language developed at _____?

A. AT & T’s Bell Laboratories of USA in 1972

B. AT & T’s Bell Laboratories of USA in 1970

C. Sun Microsystems in 1973

D. Cambridge University in 1972

Correct Answers : A

3. For 16-bit compiler allowable range for integer constants is ______ ?

A. -3.4e38 to 3.4e38

B. -32767 to 32768

C. -32768 to 32767

D. -32668 to 32667

Correct Answers : C

4. C programs are converted into machine language with the help of

A. An Editor

B. A compiler

C. An operating system

D. None of the above

Correct Answers : B

5. A C variable cannot start with

A. An alphabet

B. A number

C. A special symbol other than underscore

D. both (b) and (c)

Correct Answers : D

6. Which of the following is allowed in a C Arithmetic instruction

A. []

B. {}

C. ()

D. None of the above

Correct Answers : C

7. Which of the following shows the correct hierarchy of arithmetic operations in C

A. / + * –

B. * – / +

C. + – / *

D. * / + –

Correct Answers : D

8. What is an array?

A. An array is a collection of variables that are of the dissimilar data type.

B. An array is a collection of variables that are of the same data type.

C. An array is not a collection of variables that are of the same data type.

D. None of the above.

Correct Answers : B

9. What is right way to Initialization array?

A. int num[6] = { 2, 4, 12, 5, 45, 5 } ;

B. int n{} = { 2, 4, 12, 5, 45, 5 } ;

C. int n{6} = { 2, 4, 12 } ;

D. int n(6) = { 2, 4, 12, 5, 45, 5 } ;

Correct Answers : A

10. An array elements are always stored in _________ memory locations.

A. Sequential

B. Random

C. Sequential and Random

D. None of the above

Correct Answers : A

11. What is the right way to access value of structure variable book{ price, page }?

A. printf(“%d%d”, book.price, book.page);

B. printf(“%d%d”, price.book, page.book);

C. printf(“%d%d”, price::book, page::book);

D. printf(“%d%d”, price->book, page->book);

Correct Answers : A

12. perror( ) function used to ?

A. Work same as printf()

B. prints the error message specified by the compiler

C. prints the garbage value assigned by the compiler

D. None of the above

Correct Answers : B

13. Bitwise operators can operate upon?

A. double and chars

B. floats and doubles

C. ints and floats

D. ints and chars

Correct Answers : D

14. What is C Tokens?

A. The smallest individual units of c program

B. The basic element recognized by the compiler

C. The largest individual units of program

D. A & B Both

Correct Answers : D

15. What is Keywords?

A. Keywords have some predefine meanings and these meanings can be changed.

B. Keywords have some unknown meanings and these meanings cannot be changed.

C. Keywords have some predefine meanings and these meanings cannot be changed.

D. None of the above

Correct Answers : C

16. What is constant?

A. Constants have fixed values that do not change during the execution of a program

B. Constants have fixed values that change during the execution of a program

C. Constants have unknown values that may be change during the execution of a program

D. None of the above

Correct Answers : A

17. Which is the right way to declare constant in C?

A. int constant var =10;

B. int const var = 10;

C. const int var = 10;

D. B & C Both

Correct Answers : D

18. Which operators are known as Ternary Operator?

A. ::, ?

B. ?, :

C. ?, ;;

D. None of the above

Correct Answers : B

19. In switch statement, each case instance value must be _______?

A. Constant

B. Variable

C. Special Symbol

D. None of the above

Correct Answers : A

20. What is the work of break keyword?

A. Halt execution of program

B. Restart execution of program

C. Exit from loop or switch statement

D. None of the above

Correct Answers : C

21. What is function?

A. Function is a block of statements that perform some specific task.

B. Function is the fundamental modular unit. A function is usually designed to perform a specific task.

C. Function is a block of code that performs a specific task. It has a name and it is reusable

D. All the above

Correct Answers : D

22. Which one of the following sentences is true ?

A. The body of a while loop is executed at least once.

B. The body of a do … while loop is executed at least once.

C. The body of a do … while loop is executed zero or more times.

D. A for loop can never be used in place of a while loop.

Correct Answers : B

23. A binary tree with 27 nodes has _______ null branches.

A. 54

B. 27

C. 26

D. None of the above

Correct Answers : D

24. Which one of the following is not a linear data structure?

A. Array

B. Binary Tree

C. Queue

D. Stack

Correct Answers : B

25. Recursive functions are executed in a?

A. First In First Out Order

B. Load Balancing

C. Parallel Fashion

D. Last In First Out Order

Correct Answers : D

26. Queue is a _____________ list.

A. LIFO

B. LILO

C. FILO

D. FIFO

Correct Answers : D

27. The statement print f (“%d”, 10 ? 0 ? 5 : 1 : 12); will print?

A. 10

B. 0

C. 12

D. 1

Correct Answers : D

28. To represent hierarchical relationship between elements, which data structure is suitable?

A. Priority

B. Tree

C. Dqueue

D. All of the above

Correct Answers : B

29. Which of the following data structure is linear type?

A. Strings

B. Queue

C. Lists

D. All of the above

Correct Answers : D

30. The statement printf(“%c”, 100); will print?

A. prints 100

B. print garbage

C. prints ASCII equivalent of 100

D. None of the above

Correct Answers : C

31. The _______ memory allocation function modifies the previous allocated space.

A. calloc

B. free

C. malloc

D. realloc

Correct Answers : D

32. Number of binary trees formed with 5 nodes are

A. 30

B. 36

C. 108

D. 42

Correct Answers : D

33. The “C” language is

A. Context free language

B. Context sensitive language

C. Regular language

D. None of the above

Correct Answers : A

34. The worst case time complexity of AVL tree is better in comparison to binary search tree for

A. Search and Insert Operations

B. Search and Delete Operations

C. Insert and Delete Operations

D. Search, Insert and Delete Operations

Correct Answers : D

35. In which tree, for every node the height of its left subtree and right subtree differ almost by one?

A. Binary search tree

B. AVL tree

C. Threaded Binary Tree

D. Complete Binary Tree

Correct Answers : B

36. C is ______ Language?

A. Low Level

B. High Level

C. Assembly Level

D. Machine Level

Correct Answers : A

37. The Default Parameter Passing Mechanism is called as

A. Call by Value

B. Call by Reference

C. Call by Address

D. Call by Name

Correct Answers : A

38. What is Dequeue?

A. Elements can be added from front

B. Elements can be added to or removed from either the front or rear

C. Elements can be added from rear

D. None of the above

Correct Answers : B

39. In which linked list last node address is null?

A. Doubly linked list

B. Circular list

C. Singly linked list

D. None of the above

Correct Answers : C

40. Which is the correct syntax to declare constant pointer?

A. int *const constPtr;

B. *int constant constPtr;

C. const int *constPtr;

D. A and C both

Correct Answers : D

41.More C Language Multiple Choice Questions: Click Here

1. What will be the output of the following arithmetic expression ?

5+3*2%10-8*6

a) -37

b) -42

c) -32

d) -28

Ans: a

42. What will be the output of the following statement ?

int a=10; printf(“%d &i”,a,10);

a) error

b) 10

c) 10 10

d) none of these

Ans: d

43. What will be the output of the following statement ?

printf(“%X%x%ci%x”,11,10,’s’,12);

a) error

b) basc

c) Bas94c

d) none of these

Ans: b

44. What will be the output of the following statements ?

int a = 4, b = 7,c; c = a = = b; printf(“%i”,c);

a) 0

b) error

c) 1

d) garbage value

Ans: a

45. What will be the output of the following statements ?

int a = 5, b = 2, c = 10, i = a>bvoid main()

{ printf(“hello”); main(); }

a) 1

b) 2

c) infinite number of times

d) none of these

Ans: c

6. What will be output if you will compile and execute the following c code?struct marks{int p:3;int c:3;int m:2;};

void main(){

struct marks s={2,-6,5};

printf(“%d %d %d”,s.p,s.c,s.m);

}

(a) 2 -6 5

(b) 2 -6 1

(d) Compiler error

(e) None of these

Ans: c

46. What will be the output of the following statements ?

int x[4] = {1,2,3}; printf(“%d %d %D”,x[3],x[2],x[1]);

a) 03%D

b) 000

c) 032

d) 321

Ans: c

8. What will be the output of the following statement ?printf( 3 + “goodbye”);

a) goodbye

b) odbye

c) bye

d) dbye

Ans: d

9. What will be the output of the following statements ?

long int a = scanf(“%ld %ld”,&a,&a); printf(“%ld”,a);

a) error

b) garbage value

c) 0

d) 2

Ans: b

10. What will be the output of the following program ?

#include

void main()

{ int a = 2;

switch(a)

{ case

printf(“goodbye”); break;

case 2:

continue;

case 3:

printf(“bye”);

}

a) error

b) goodbye

c) bye

d) byegoodbye

Ans: a

11. What will be the output of the following statements ?

int i = 1,j; j=i— -2; printf(“%d”,j);

a) error

b) 2

c) 3

d) -3

Ans: c

12. What will be the output of following program ?

#include

main()

{

int x,y = 10;

x = y * NULL;

printf(“%d”,x);

}

a) error

b) 0

c) 10

d) garbage value

Ans: b

13. What will be the output of following statements ?

char x[ ] = “hello hi”; printf(“%d%d”,sizeof(*x),sizeof(x));

a) 88

b) 18

c) 29

d) 19

Ans: d

47. What will be the output of the following statements ?

int a=5,b=6,c=9,d; d=(ac?1:2):(c>b?6:8)); printf(“%d”,d);

a) 1

b) 2

c) 6

d) Error

Ans: d

48. main()

{

struct

{

int i;

}xyz;

(*xyz)->i=10;

printf(“%d”,xyz.i);

}

What is the output of this program?

a) program will not compile

b) 10

c) god only knows

d) address of I

Ans: b

49.What will happen if in a C program you assign a value to an array element whose subscript exceeds the size of array?

A. The element will be set to 0.

B. The compiler would report an error.

C. The program may crash if some important data gets overwritten.

D. The array size would appropriately grow.

Ans: C

22. What would be the output of the following program?

#include

main()

{

char str[]=”S65AB”;

printf(“n%d”,

sizeof(str));

}

a) 7

b) 6

c) 5

d) error

Ans: b

23. What will be the value of `a` after the following code is executed

#define square(x) x*x

a = square(2+3)

a) 25

b) 13

c) 11

d) 10

Ans: c

24. #include

void func()

{

int x = 0;

static int y = 0;

x++; y++;

printf( “%d — %dn”, x,

y );

}

int main()

{

func();

return 0;

}

What will the code above print when it is

executed?

1 — 1

2 — 1

1 — 1

2 — 2

1 — 1

1 — 2

Ans: d

50.long factorial (long x)

{

????

return x * factorial(x – 1);

}

With what do you replace

the ???? to make the function shown above return the correct Correct Answers ?

a)if (x == 0)

return 0;

b)return 1;

c)if (x >= 2) return 2;

d)if (x <= 1) return 1;

Ans: d

51. int y[4] = {6, 7, 8, 9};

int *ptr = y + 2; printf(“%dn”, ptr[ 1 ] );

What is printed when the sample code above is executed?

a) 6

b) 7

c) 8

d) 9

Ans: d

52. int i = 4;

switch (i)

{

default: ;

case 3:

i += 5;

if ( i == 8)

{

i++;

if (i == 9) break;

*= 2;

}

i -= 4;

break;

case 8:

i += 5;

break;

}

printf(“i = %dn”, i);

What will the output of

the sample code above be?

a) i = 5

b) i = 8

c) i = 9

d) i = 10

Ans: a

53. What will be output if you will compile and execute the following c code?

void

main()

{

if(printf(“cquestionbank”))

printf(“I know c”);

else

printf(“I know c++”);

}

(a) I

know c

(b) I know c++

(d) cquestionbankI know c++

(e) Compiler

error

Correct Answers : (c)

54.What will be output if you will compile and execute the following c code?

#define

call(x) #x

void main(){

printf(“%s”,call(c/c++));

}

(a)c

(b)c++

(c)#c/c++

(d)c/c++

(e)Compiler

error

Correct Answers : (d)

55. What will be output if you will compile and execute the following c code?

#define

message “union is

power of c”

void main()

{

clrscr();

printf(“%s”,message);

getch();

}

(a) union is power of c

(b) union is power of c

(d) Compiler error

(e) None of these

Correct Answers : (b)

56. What will be output if you will compile and execute the following c code?

void

main(){

int a=25;

clrscr();

printf(“%o %x”,a,a);

getch();

}

(a) 25 25

(b) 025 0x25

(d) 31 19

(e) None of these

Correct Answers : (d)

57. What will be output if you will compile and execute the following c code?

void

main()

{

int i=0;

if(i==0){

i=((5,(i=3)),i=1);

printf(“%d”,i);

}

else

printf(“equal”);

}

(a) 5

(b) 3

(d) equal

(e) None of above

Correct Answers : (c)

58.What will be output if you will compile and execute the following c code?

int extern

void main()

printf(“%d”,x);

x=2;

getch();

}

int x=23;

(a) 0

(b) 2

(d) Compiler error

(e) None of these

Correct Answers : (c)

59.What will be output if you will compile and execute the following c code?

void main

(){

int a,b;

a=1,3,15;

b=(2,4,6);

clrscr();

printf(“%d “,a+b);

getch();

}

(a) 3

(b) 21

(d)

(e) Compiler error

Correct Answers : (d)

60.What will be output if you will compile and execute the following c code?

void main

(){

static main;

int x;

x=call(main);

clrscr();

printf(“%d “,x);

getch();

}

int call(int

address){

address++;

return address;

}

(a) 0

(b) 1

(d) Compiler error

(e)

None of these

Correct Answers : (b)

61. What will be output if you will compile and execute the following c code?

#include

“string.h”

void main(){

clrscr();

printf(“%d %d”,sizeof(“string”),strlen(“string”));

getch();

}

(a) 6 6

(b) 7 7

(d) 7 6

(e) None of these

Correct Answers : (d)

62. Write c program which display mouse pointer and position of pointer.(In x

coordinate, y coordinate)?

Correct Answers :

#include”dos.h”

#include”stdio.h”

void main()

{

union REGS i,o;

int x,y,k;

//show

mouse pointer

i.x.ax=1;

int86(0x33,&i,&o);

while(!kbhit()) //its value will false when we

hit key in the key board

{

i.x.ax=3; //get mouse position

x=o.x.cx;

y=o.x.dx;

clrscr();

printf(“(%d , %d)”,x,y);

delay(250);

int86(0x33,&i,&o);

}

getch();

}

63.What will be output if you will compile and execute the following c code?

void main

(){

int huge*p=(int huge*)0XC0563331;

int huge*q=(int huge*)0xC2551341;

*p=200;

printf

(“%d”,*q);

}

(a)0

(b)Garbage value

(c)null

(d) 200

(e)Compiler error

Correct Answers : (d)

64.What will be output if you will compile and execute the following c code?

struct

marks{

int p:3;

int c:3;

int m:2;

};

void main(){

struct marks s={2,-6,5};

printf(“%d %d

%d”,s.p,s.c,s.m);

}

(a) 2 -6 5

(b) 2 -6 1

(d) Compiler error

(e) None of these

Correct Answers : (c)

65.What will be output if you will compile and execute the following c code?

void main

(){

if(printf(“cquestionbank”))

printf(“I know c”);

else

printf(“I know c++”);

}

(a) I know

(b) I know c++

(d) cquestionbankI know c++

(e) Compiler error

Correct Answers : (c)

66.What will be output if you will compile and execute the following c code?

#define

call(x) #x

void main(){

printf(“%s”,call(c/c++));

}

(a)c

(b)c++

(c)#c/c++

(d)c/c++

(e)Compiler

error

Correct Answers : (d)

67. What will be output if you will compile and execute the following c code?

#define

message “union is

power of c”

void main(){

clrscr();

printf(“%s”,message);

getch();

}

(a)

union is power of c

(b) union ispower of c

Power of c

(d) Compiler error

(e)

None of these

Correct Answers : (b)

68. What will be output if you will compile and execute the following c code?

void

main(){

int a=25;

clrscr();

printf(“%o %x”,a,a);

getch();

}

(a) 25 25

(b) 025 0x25

(d) 31 19

(e) None of these

Correct Answers : (d)

69. What will be output if you will compile and execute the following c code?

void

main(){

int i=0;

if(i==0){

i=((5,(i=3)),i=1);

printf(“%d”,i);

}

else

printf(“equal”);

}

(a) 5

(b) 3

(d) equal

(e) None of above

Correct Answers : (c)

70.What will be output if you will compile and execute the following c code?

int extern

void main()

printf(“%d”,x);

x=2;

getch();

}

int x=23;

(a) 0

(b) 2

(d) Compiler error

(e) None of these

Correct Answers : (c)

71.What will be output if you will compile and execute the following c code?

void main

(){

int a,b;

a=1,3,15;

b=(2,4,6);

clrscr();

printf(“%d “,a+b);

getch();

}

(a) 3

(b) 21

(d)

(e) Compiler error

Correct Answers : (d)

72.What will be output if you will compile and execute the following c code?

void main

(){

static main;

int x;

x=call(main);

clrscr();

printf(“%d “,x);

getch();

}

int call(int

address){

address++;

return address;

}

(a) 0

(b) 1

(d) Compiler error

(e)

None of these

Correct Answers : (b)

73.What will be output if you will compile and execute the following c code?

#include

“string.h”

void main(){

clrscr();

printf(“%d %d”,sizeof(“string”),strlen(“string”));

getch();

}

(a) 6 6

(b) 7 7

(d) 7 6

(e) None of these

Correct Answers : (d)

74.What will be output if you will compile and execute the following c code?

void main

(){

int huge*p=(int huge*)0XC0563331;

int huge*q=(int huge*)0xC2551341;

*p=200;

printf

(“%d”,*q);

}

(a)0

(b)Garbage value

(c)null

(d) 200

(e)Compiler error

Correct Answers : (d)

75.What will be output if you will compile and execute the following c code?

struct

marks{

int p:3;

int c:3;

int m:2;

};

void main(){

struct marks s={2,-6,5};

printf(“%d %d

%d”,s.p,s.c,s.m);

}

(a) 2 -6 5

(b) 2 -6 1

(d) Compiler error

(e) None of these

Correct Answers : (c)

76.What will be output if you will compile and execute the following c code?

void main

(){

if(printf(“cquestionbank”))

printf(“I know c”);

else

printf(“I know c++”);

}

(a) I know

(b) I know c++

(d) cquestionbankI know c++

(e) Compiler error

Correct Answers : (c)

77.What will be output if you will compile and execute the following c code?

#define

call(x) #x

void main(){

printf(“%s”,call(c/c++));

}

(a)c

(b)c++

(c)#c/c++

(d)c/c++

(e)Compiler

error

Correct Answers : (d)

78. What will be output if you will compile and execute the following c code?

#define

message “union is

power of c”

void main(){

clrscr();

printf(“%s”,message);

getch();

}

(a)

union is power of c

(b) union ispower of c

Power of c

(d) Compiler error

(e)

None of these

Correct Answers : (b)

79. What will be output if you will compile and execute the following c code?

void

main(){

int a=25;

clrscr();

printf(“%o %x”,a,a);

getch();

}

(a) 25 25

(b) 025 0x25

(d) 31 19

(e) None of these

Correct Answers : (d)

80.What will be output if you will compile and execute the following c code?

void main

(){

int i=0;

if(i==0){

i=((5,(i=3)),i=1);

printf(“%d”,i);

}

else

printf(“equal”);

}

(a) 5

(b) 3

(d) equal

(e) None of above

Correct Answers : (c)

81.What will be output if you will compile and execute the following c code?

int extern

void main()

printf(“%d”,x);

x=2;

getch();

}

int x=23;

(a) 0

(b) 2

(d) Compiler error

(e) None of these

Correct Answers : (c)

82.What will be output if you will compile and execute the following c code?

void main

(){

int a,b;

a=1,3,15;

b=(2,4,6);

clrscr();

printf(“%d “,a+b);

getch();

}

(a) 3

(b) 21

(d)

(e) Compiler error

Correct Answers : (d)

83.What will be output if you will compile and execute the following c code?

void main

(){

static main;

int x;

x=call(main);

clrscr();

printf(“%d “,x);

getch();

}

int call(int

address){

address++;

return address;

}

(a) 0

(b) 1

(d) Compiler error

(e)

None of these

Correct Answers : (b)

84.What will be output if you will compile and execute the following c code?

#include

“string.h”

void main(){

clrscr();

printf(“%d %d”,sizeof(“string”),strlen(“string”));

getch();

}

(a) 6 6

(b) 7 7

(d) 7 6

(e) None of these

Correct Answers : (d)

85.What will be output if you will compile and execute the following c code?

void main

(){

int huge*p=(int huge*)0XC0563331;

int huge*q=(int huge*)0xC2551341;

*p=200;

printf

(“%d”,*q);

}

(a)0

(b)Garbage value

(c)null

(d) 200

(e)Compiler error

Correct Answers : (d)

86. What is the right way to access value of structure variable book{ price, page }?

printf(“%d%d”, book.price, book.page);

B. printf(“%d%d”, price.book, page.book);

printf(“%d%d”, price::book, page::book);

D. printf(“%d%d”, price->book, page->book);

Correct Answers : A

87. perror( ) function used to ?

A. Work same as printf()

B. prints the error message

specified by the compiler

C. prints the garbage value assigned by the compiler

D. None

of the above

Correct Answers : B

88.Bitwise operators can operate upon?

A. double and chars

B. floats and doubles

C. ints

and floats

D. ints and chars

Correct Answers : D

89. What is C Tokens?

A. The smallest individual units of c program

B. The basic element

recognized by the compiler

C. The largest individual units of program

D. A & B Both

Correct Answers : D

90. What is Keywords?

A. Keywords have some predefine meanings and these meanings can

be changed.

B. Keywords have some unknown meanings and these meanings cannot be

changed.

C. Keywords have some predefine meanings and these meanings cannot be

changed.

D. None of the above

Correct Answers : C

91.What is constant?

A. Constants have fixed values that do not change during the

execution of a program

B. Constants have fixed values that change during the execution

of a program

C. Constants have unknown values that may be change during the execution

of a program

D. None of the above

Correct Answers : A

92. Which is the right way to declare constant in C?

A. int constant var =10;

B. int

const var = 10;

C. const int var = 10;

D. B & C Both

Correct Answers : D

93. Which operators are known as Ternary Operator?

A. ::, ?

B. ?, :

C. ?, ;;

D. None of

the avobe

Correct Answers : B

94. In switch statement, each case instance value must be _______?

A. Constant

Variable

C. Special Symbol

D. None of the avobe

Correct Answers : A

95. What is the work of break keyword?

A. Halt execution of program

B. Restart execution

of program

C. Exit from loop or switch statement

D. None of the avobe

Correct Answers : C

96. What will be the output of the following statements ?

int i = 3;

printf(“%d%d”,i,i+

+);

a) 34

b) 43

c) 44

d) 33

Ans: b

97. What will be the output of the following program ?

#include

void main()

{

int a = 36,

b = 9;

printf(“%d”,a>>a/b-2);

}

a) 9

b) 7

c) 5

d) none of these

Ans: a

98. int testarray[3][2][2] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};

What value does

testarray[2][1][0] in the sample code above contain?

a) 11

b) 7

c) 5

d) 9

Ans: a

99. void main()

{

int a=10,b=20;

char x=1,y=0;

if(a,b,x,y)

{

printf(“EXAM”);

}

What is the

output?

a) XAM is printed

b) exam is printed

c) Compiler Error

d) Nothing is printed

Ans: d

100. What is the output of the following code?

#include

void main()

{

int s=0;

while(s+

+<10)>

# define a 10

main()

{

printf(“%d..”,a);

foo();

printf(“%d”,a);

}

void foo()

{

#undef a

#define a 50

}

a) 10..10

b) 10..50

c) Error

d) 0

Ans: c