# Placement Papers - TCS

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### TCS PAPER - C TEST

Posted By : Nowshad Rating : +399, -130
Subject: TCS C Questions

--------------------------

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) 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;
}

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 whithin 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?
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 of the above

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 =
%s", name);
a) name =
name
b) name =
followed by funk characters
c) name =
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

5) 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;
printd (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), squre(k));
output?
a.32  b.23  c.31  d.13

char *name;
char *city;
int zip;
};

which are valid references?

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);
}
mixup (int p1, char *p2, char **p3)
{
int *temp;
.doesnt matter.
}

44) what is the value of a after mixup?
a. a       b.b           c.c            d.none of the above

45) what is the value of b after mixup?
a. a       b.b           c.c            d.none of the above

46) main ()
{
char s[] = "T.C.S", *A;
print(s);
}
print (char *p)
{
while (*p != '')
{
if (*p != ".")
printf ("%s", *p);
p++;
}
}
output?
a.T.C.S    b.TCS    c.    d. none of the above

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