100 c interview questions answers

ans: e reason: %p represents the pointer format specifier.. ans: c reason: printf returns the total no... ans: d reason: The puts prints and places the cursor in the next line, wh

1

ans: (a)

reason:

you cannot declare structure as unsized array

2

ans: (b)

reason:

The return st returns x value first as it is and then

decrements its value

Its post decrement

3

ans: (e)

reason:

%p represents the pointer format specifier It prints the

value in

hexa decimal upto four digits

4

ans: (b)

5

ans: (b)

reason:

The values in the if st () is said to be in the stack So the last element

in the stack is taken as check value(zero/non-zero) Here TRUE

is -1 i.e

success stateand x+y is printed

6

/* Unsolved*/

7

ans: (c)

reason:

Static initializes all to 0

8

ans: (b)

reason:

char pointer size = 1

int pointer size = 2

9

ans: (d)

reason:

10

ans: (c)

reason:

printf returns the total no of characters it prints on the screen

11

ans: (c)

unsolved*/

12

reason:

;;; doesnot matter This indicates only an empty statement The o/p will be 3,1

13

ans: (b)

14

ans: (d)

reason:

The puts prints and places the cursor in the next line,

whereas

the printf prints and places the cursor in the same line

15

ans: (c)

reason:

You need to put '=' sign at show ie the correct st is end=(char*)(show=(char*)strcpy(start,"MISPIS,"));

or else expression error

16

ans: (e)

reason:

The _fastcall keyword is reserved for

programming under Windows and OS/2

17

ans: (a)

reason:

The strcmp returns 0 if zone==target, If 0 the ?: assigns fail st i.e 0

This is false value for IF st and hence else part is

executed

18

ans: (c)

reason:

t1 is an array So you need to specify the subscript value while

you assign any element to it

char *t1; t1="craft" is correct since *t1 is a pointer and it points

to the starting addr of the craft

19

ans: (b)

unsolved

20

ans: (b)

21

ans: (a)

reason:

Its a static array

22

ans: (b)

unsolved

23

ans : (a)

24

ans: (d)

25

ans: (c)

reason:

c+ +100 is not valid as c=c+100

26

ans: (d)

27

ans: (a)

28

ans: (b)

29

ans: (a)

30

ans:(c)

31

ans: (d)

32

ans: (e)

reason: incompatiable type conversions

33

ans: (c)

reason: odd no AND with 1 gives TRUE value always

34

ans:

(b)

reason:

if we mention the string as two dimentional(for more than one dim)

array with in printf statement,then we should give

'&'symbol

35

ans: (b)

reason:

res=0+1/5;

res=1/5+1/4;

res=1/5+1/4+1/3;

res=1/5+1/4+1/3+1/2+1/1;

At last time

res=1/5+1/4+1/3+1/2+1/1+1/0;

^ | zero divide occur

36

ans: (b)

reason:

'%c' mainly used for print one charactor

We can't specify formate output within '%c'

37

ans: (b)

reason:

can not modify constant value

It is a fixed value for entire program

38

ans: (b)

reason:

'argc' holds number of arguments

argc consist always value 1 becase file name is one of the input

therefore 1<1 gives false whereas 1==1 gives true

39

ans: (a)

reason:

% followed by non-format specifier is printed as such with % symbol

40

ans : (b)

reason: if no format specifier is given immediately after the first appearance of % then the characters after the % are

printed as such

41

ans: (d)

reason:

the scanf must have &x,&y for %d format specifiers

42

ans: (a)

reason:

In if statement, x=6 is assigned and not checked

43

ans: (d)

reason: self

44

ans: (a)

reason: odometer principle, since a is unsigned it is always +ve

45

ans: (a)

reason: self

46

ans: (e)

reason: unsolved

47

ans: (c)

reason: x will contain the garbage value hence default

48

ans: (b)

reason: x will contain the garbage value hence default

49

ans: (b)

reason: self

50

ans: (b)

reason: self

51

ans: (b)

reason: recursive function

52

ans: (d)

reason: t is a pointer and memory allocation is not needed for that

53

ans: (a)

reason: Each 0 bit in the operand is set to 1, and each 1 bit

in the operand is set to 0 if we use ~

54

ans: (c)

reason: int x:8 will get only first 8 bits assigned to it ie.,

1 byte of size

int x:9 will get only first 9 bits assigned to it ie., 2 byte

of size

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

x : 8 a a a a a a a a n n n n n n n n

x : 9 a a a a a a a a a n n n n n n n

- -

1 byte 1 byte

55

ans: (e)

reason:

56

ans: (b)

reason: self

57

ans: (d)

reason: self

58

ans: (a)

reason: can't understand

59

ans: (b)

reason: self

60

ans: (c)

reason:

61

ans: (1)

reason: self

62

ans: (b)

63

ans: (c)

64

ans: (a)

65

ans:(c)

66

ans: (f)

67

ans: (b)

reason : if you give int main() it goes to infinite loop

68

ans: (d)

69

ans: (b)

70

ans: (b)

71

ans: (c)

72

ans: (e)

73

ans: (b)

reason: if name is given the output is hai

74

ans: (a)

75

ans: (b)

76

ans: (a)

77

ans: (c)

78

ans: (c)

79

ans: (a)

80

ans: (a)

81

82

ans: (d)

reason : pointers cannot be added

83

ans: (d)

84

ans: (b)

reason: stack concept

85

ans: (b)

86

ans: (a)

87

ans: (c)

88

ans: (c)

89

ans: (a)

90

ans: (a)

91

92

93

ans:(c)

94

ans: (d)

reason: message[] is correct

95

ans: (c)

reason: static is not allowed in main( ) If removed, junk value

96

ans: (a)

reason: self

97

ans: (b)

reason:

98

ans: (a)

99

ans: (b)

reason:

100

ans: (c)

reason: *_ is an allowed variable