C Programming MCQ with Answers [ SET - 6 ] | C Programming mcq Diploma

 

1. Which symbol is used as a statement terminator in C?

A) !
B) #
C) ~
D) ;

ANSWER= (D) ;

 

2.  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
C)  2 2 1
D) Compiler error

ANSWER= (C) 2 2 1

 

3. Pointers are of

A) Integer data type
B) Character data type
C) Unsigned integer data types
D)  None of these

ANSWER= (D)  None of these

 

4. Identify the invalid pointer arithmetic

A) Addition of float value to a pointer
B) Comparison of pointers that do not point to the element of the same array
C) Subtracting an integer from a pointer
D) Assigning the value 0 to a pointer variable

ANSWER= (A)  Addition of float value to a pointer

 

5.  …… is a library function used in C to display any output to the terminal. The text to be printed is enclosed in ……. quotes.

A) Printf, Single
B) Printf, double
C) Scanf, double
D) none

ANSWER= (B)  Printf, double

 

6. Following declaration in C++ -

int x ; int &p = x;

is same as the declaration

int x, *p; p =&x;

This remark is

A) true
B) false
C) sometimes true
D)  none of these

ANSWER= (B) false

 

7.  Which is more appropriate for reading in a multiword string? 

A)  gets() 
B) fgets() 
C) scanf( 
D) scan() 

ANSWER= (A) gets() 

 

8. char name [] = {'T', 'W', 'D','T', 'A', '\0');

 printf("%d", strlen (name));

The output is

A) 6
B) 0
C) 5
D) 7

ANSWER= (A) 6

 

9. 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
C) 17
D) 7

ANSWER= (D) 7

 

10. Which of the following symbol is used to denote a pre-processor statement?

A) !
B) #
C) ~
D) ;

ANSWER= (B) #

 

11.Which of the following is a Scalar Data type

A) Float
B) Union
C) Array
D) Pointer

ANSWER= (A) Float

 

12. What is the output?

char a[]="ABCD", b[ ]= "abcd": 

strcpy(b,a);

printf("%s %s", a, b);

A) abcd ABCD,
B) ABCD ABCD. 
C) ABCD abcd,
D) abcdabed.

ANSWER= (B)  ABCD ABCD. 

 

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

A) calloc
B) free
C)  malloc
D) realloc

ANSWER= (D) realloc

 

14. Number of binary trees formed with 5 nodes are

A) 30
B) 36
C) 108
D) 42

ANSWER= (D) 42

 

15.  In C, if you pass an array as an argument to a function, what actually gets passed ?

A) Value of elements in array 
B) First of elements of the array 
C) Base address of the array
D) Address of the last element of array

ANSWER= (C) Base address of the array

 

16. The Default Parameter Passing Mechanism is called as

A) Call by Value
B) Call by Reference
C) Call by Address
D) Call by Name

ANSWER= (A) Call by Value

 

17. C is _______ type of programming language.?

A)  Object Oriented
B) Procedural
C) Bit level language
D) Functional

ANSWER= (B) Procedural

 

18. 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 would appropriately grow
D) The array size 

ANSWER= (C)  The program may crash if some important data gets overwritten would appropriately grow

 

19. 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

ANSWER= (B) AVL tree

 

20. What is the present C Language Standard.?

A)  C99 ISO/IEC 9899:1999
B) C11 ISO/IEC 9899:2011
C) C05 ISO/IEC 9899:2005
D) C10 ISO/IEC 9899:2010

ANSWER= (B) C11 ISO/IEC 9899:2011

 

21. If the two strings are identical, then strcmp() function returns

A) -1
B) 1
C) 0
D) Yes

ANSWER= (C) 0

 

22. An _______ is a fixed size sequence collection of elements of the same data type

A)  integer
B) function
C) array
D) pointer

ANSWER= (C)  array

 

23. Array passed as argument to a function is treated as: 

A) Address of the array
B) Value of the first element of the array 
C) Address of the first element of the array
D) Number of elements of the array

ANSWER= (C) Address of the first element of the array

 

24. The library function strcmp("abc","ABC"); returns

A) 32
B) -32
C) 0
D) 1

ANSWER= (D) 1

 

25. Which of the following function is used for sets the position to a desired point in the file

A) putc()
B) putw()
C) fseek()
D)  getw()

ANSWER= (C) fseek()

 

26.  If you want to exchange two rows in a two-dimensional array, the fastest way is to:

A) Exchange the elements of the 2rows
B) Exchange the address of each element in the two rows
C) Silence the address of the rows in an array of the pointer and exchange the pointer
D)  None of these.

ANSWER= (C) Silence the address of the rows in an array of the pointer and exchange the pointer

 

27. An array is passed to a function as argument to the function in C language equivalent

A)  call by value 
B) call by reference 
C) call by name
D)  none of these

ANSWER= (B) call by reference 

 

28.  …… allows the programs to interact with the screen, keyboard and file system of your computer.

A) # include (stdio.h>
B) #include <file.h>
C) #include <conio.h>
D) #include <math.h>

ANSWER= (A)  # include (stdio.h>

 

29.In C++ , following statement -

Class z : public X , public Y is an example of -

A) multiple inheritance
B) Multilevel Inheritance
C) linear Inheritance
D) none of these

ANSWER= (A) multiple inheritance

 

30. Write the output of the following program fragment:

main()

{

printf("Hello World"); 

main();

}

 

A) compilation error
B)  run time error
C)  infinite loop
D) none of these

ANSWER= (C) infinite loop

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