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TCS -- C & COBOL TEST PAPER.
1) Which of these is an invalid dataname?
a) wd-count b) wd_count
c) w4count d) wdcountabcd
2) What is the output of the following program ?
main ()
{
unsigned int i;
for (i = 10; i >= 0; i--)
printf ("%d", i);
}
a) prints numbers 10 - 0
b) b) prints nos 10 - 1
c)
d) goes into infinite loop
11) What is the value of the following expression?
i = 1;
i << 1 % 2
a) 2 b)
c) 1 d) 0
12) What is the value of the following expression?
i = 1;
i = (i <<= 1 % 2)
a) 2 b)
c) 0 d) erroneous syntax
What is the result?
13) *A + 1 - *A + 3
a) - b) -2
c) 4 d) none of the above
14) &A[5] - &A[1]?
a) b) c) 4 d)
15) C allows
a) only call by value
b) only call by reference
c) both
d) only call by value and sometimes call by reference
16) The following statement is
" The size of a struct is always equal to the sum of the sizes of its members"
a) valid b) invalid c) can't say
17) How many x's are printed?
for (i = 0, j = 10; i < j; i++, j--)
printf ("x");
a) 10 b) 5 c) 4 d) none
18) output?
main ()
{
int i = 2, j = 3, k = 1;
swap (i, j)
printf ("%d %d", i, j);
}
swap (int i, int j)
{
int temp;
temp = i; i = j; j = temp;
}
YOU KNOW THE ANSWER
19) main ()
{
int i = 2;
twice (2);
printf ("%d", i);
}
twice (int i)
{
bullshit
}
int i, b[] = {1, 2, 3, 4, 5}, *p;
p = b;
++*p;
p += 2;
20) What is the value of *p;
a) 2 b) 3 c) 4 d) 5
21) What is the value of (p - (&p - 2))?
a) b) 2 c) d)
23) x = fopen (b, c)
what is b?
a) pointer to a character array which contains the filename
b) filename within double quotes
c) can be anyone of the above
d) none
24) x = malloc (y). Which of the following statements is correct.
a) x is the size of the memory
allocated.
b) y points to the memory allocated
c) x points to the memory allocated
d) none of the above
25) Which is the valid declaration?
a) #typedef struct { int i;}in;
b) typedef struct in {int i;};
c) #typedef struct int {int i;};
d) typedef struct {int i;}in;
26) Union {
int no;
char ch;
} u;
What is the output?
u.ch = '2';
u.no = 0;
printf ("%d", u.ch);
a) 2 b) 0 c) null character d) none
27) Which of these are valid declarations?
i) union { ii) union u_tag {
int i; int i;
int j; int j;
}; };
iii) union { iv) union {
int i; int i;
int j; int j;
FILE k; }u;
};
a) all correct b) i, ii, iv
c) ii & iv d)
28) p and q are pointers to the same type of dataitems.
Which of these are valid?
i) *(p+q)
ii) *(p-q)
iii) *p - *q
a) all b) c) iii is valid sometimes
29) which are valid?
i) pointers can be added
ii) pointers can be subtracted
iii) integers can be added to pointers
a) all correct b) only i and ii
30) int *i;
float *f;
char *c;
which are the valid castings?
i) (int *) &c
ii) (float *) &c
iii) (char *) &i
31) int i = 20;
printf ("%x", i);
What is the output?
a) x14 b) 14 c) 20 d) none
32) main ()
{
char *name = "name";
change (name);
printf ("%s", name);
}
change (char *name)
{
char *nm = "newname";
name = nm;
}
What is the output?
a) name b) newname
c) name = nm not valid
d) function call invalid
33) char name[] = {'n', 'a', 'm', 'e'}
printf ("name = \n%s", name);
a) name =
name
b) name =
followed by funk characters
c) name = \n name
d) none
34) int a = 0, b = 2;
if (a = 0)
b = 0;
else
b *= 10;
What is the value of b?
a) 0 b) 20 c) 2 d) none
35) int x = 2, y = 2, z = 1;
what is the value of x afterh the following statmements?
if (x = y%2)
z = crap
else
crap
a) 0 b) 2 c) 1 d) none
37) output?
initially n = -24;
printf (int n)
{
if (n < 0)
{
printf ("-");
n = -n;
}
if (n % 10)
printf ("%d", n);
else
printf ("%d", n/10);
printf ("%d", n);
}
a) -24 b) 24 c) d) -224
38) float x, y, z;
scanf ("%f %f", &x, &y);
if input stream contains "4.2 3 2.3 ..." what will x and y contain after scanf?
a) 4.2, 3.0 b) 4.2, 2.3 c) d)
39) #define max(a,b) (a>b?b:a)
#define squre(x) x*x
int i = 2, j = 3, k = 1;
printf ("%d %d", max(i,j),square(k));
output?
a) 32 b) 23 c) 31 d) 13
40) struct adr {
char *name;
char *city;
int zip;
};
struct adr *adradr;
which are valid references?
i) adr->name X
ii) adradr->name
iii) adr.zip X
iv) adradr.zip
41) main (x, y)
int x, char *y[];
{
printf ("%d %s", x, y[1]);
}
output ? when invoked as prog arg1?
a. 1 prog b. 1 arg1 c. 2 prog d. 2 arg1
42) extern int s;
int t;
static int u;
main ()
{
}
which of s, t and u are available to a function present in another file
a. only s
b. s & t
c. s, t, u
d. none
43) main ()
{
}
int a;
f1(){}
f2(){}
which of the functions is int a available for?
a. all of them
b. only f2
c. only f1
d. f1 and f2 only
int a = 'a', d = 'd';
char b = "b", c = "cr";
main ()
{
mixup (a, b, &c);
}
mix-up (int p1, char *p2, char **p3)
{
int *temp;
....doesnât matter.....
}
44) What is the value of a after mix-up?
a) a b) b c) c d) none
45) What is the value of b after mix-up?
a) a b) b c) c d) none
46) main ()
{
char s[] = "T.C.S", *A;
print(s);
}
print (char *p)
{
while (*p != '\0')
{
if (*p != ".")
printf ("%s", *p);
p++;
}
}
output?
a) T.C.S b) TCS c) d) none
47) A question on do ... while
48) A question on % operator
49) main ()
{
int ones, twos, threes, others;
int c;
ones = twos = threes = others = 0;
while ((c = getchar ()) != EOF)
{
switch (c)
{
case '1': ++ones;
case '2': ++twos;
case '3': ++threes;
break;
default: ++others;
break;
}
}
printf ("%d %d", ones, others);
}
if the input is "1a1b1c" what is the output?
a) 13 b) c) 33 d) 31
