100 c interview questions answers

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

100 c interview questions answers

More Related Content

What's hot

Viewers also liked

Similar to 100 c interview questions answers

100 c interview questions answers