Wipro Infotech Placement paper

THE QUESTIONS VERY WELL MOST OF the ANS ARE CORRECT. BUT YOU CAN VERIFY THEM IF TIME ALLOWS

1). Piggy backing is a technique for

a) Flow control b) sequence c) Acknowledgment d) Retransmission

ans: c Ack

2). The layer in the OST model handles terminal emulation

a) session b) application c) presentation d) transport

ans: b application

3) Ans: a odd numbers of errors

4)Q. In signed magnitude notation what is the minimum value that can be represented with 8 bits

a) -128 b) -255 c) -127 d) 0 ANS a)

5) c 20(no of address lines in 1MB of memory)

6) a 120(25 hz processor,what is the time taken by the instr which needs 3 clock cycles)

7) b synchronise the access(semaphores used for)

8 ) a system call(context switching is used in)

9) b the operating system(mapping of virtual to physical address)

10) a 177333(conversion of HEX “0xFEDB”in octal)

11) d used as a network layer protocol in network and windows(OLE) system

12) b has to be unique in the sub network(internet address)

13)Q. there is an employer table with key fields as employer no. data in every n’th row are needed for a simple following queries will get required results.

a) select A employe no. from employe A , where exists from employe B where A employe no. >= B employe having (count(*) mod n)=0

b) select employe no. from employe A, employe B where A employe no. >= B employ no. grouply employe no. having

(count(*) mod n=0 )

c) both a& b

d)none of the above

14)Q. type duplicates of a row in a table customer with non uniform key field customer no. you can see

a) delete from costomer where customer no. exists ( select distinct customer no. from customer having count )

b) delete customer a where customer no. in (select customer b where custermer no. equal to b custemor no. ) and a rowid > b rowid

c) delete customer a where custermor no. in ( select customer no. from customer a, customer b )

d) none of the above

15) which feature in ANSI C but not in JAVA.??ANS variable arguments.

16)preprocessor does not do one of the following??ANS type checking.

17) long int size

a) 4 bytes b) 2 bytes c) compiler dependent d) 8 bytes

ans: compiler dependent

18) x=2,y=6,z=6

x=y==z;
printf(%d”,x) ?ANS 1

19) class c : public A,publicB

a)2 members in class a,b can have member functions with same name.

b)2 members in class a,c can have member functions with same name.

c)both

d)none(ANS)

#######WHAT WILL BE THE I/O OF THE FOLLOWING ############

20) main()

{

char *p;

p=malloc(10);

free(p);

printf(“%d”,p);

}

ANS compilation error

21)a=(10,15)

b=10,15

what are the values of a & b in ANSI C

ANS 15,10

22)main(){

int x=10,y=15,z=16;

x=y==z;

printf(“%d”,x);

ANS 0

23)f(n) f(x)

{

if(x

<=0)

return;

else f(x-1)+x;

}

find the value of fn(5)? ANS 15.

24)struct {

int det;

struct prevoius;

struct new;

}

delete(struct node)

{

node-prev-next=node-next;

node-next-prev=node-prev;

if(node==head)node

}

one element will be given.

ANS::it does not work when rp is the last element in the link

list.

25)A code will be given which searches a particular char in

the

string.

ANS:: it always works.

26)main()

{

int var =25,varp;

varp=&var;

varp p=10;

fnc(varp);

printf(“%d%d”,var,varp);

}

ANS::55,55 (check this out)

27)#define VALUE 1+2

main()

{

printf(“%d and %d\n”,VALUE/VALUE,VALUE*3);

}

ANS:: 5,7

28)What is the value assigned to the variable a if b is 7

a=b>8?b<<2:b>4?b>>1:b;

ANS::3

29)the value of the following expr (2^3)+(a^a) is

a) 1 b)2 c) 3 d) insufficient data

30) which of the following is not basic data type

ANS char*

31)the declaration of the variable does not result in one of

the

following

ANS allocatrion of the storage space for the varable.

32)in C parameters are passed by

ANS:: value only.

33)2 variables cannot have the same name if they are

ANS:: in the same block.

34)a static funct. say s(),in as file f.c can be invoked from

ANS all functs. in f.c after the definitions of s.

35)macros and functions do not differ in the following aspects

ANS::variable no of arguments.

36)one q’s in which he will give some different forms of

STRCPY

function you will have to find out which form is correct.