1) find the probability of getting a number with 7 between 100 and

999 (both inclusive).

2) There are 10 items in a box, out of which 3 are defective.

 2 balls are taken one after the other. what is the probability

that both of them are defective?

Ans: 1/15  or 6/90

3)  Context free grammar  is accepted by

a)  finite automata

b)push down automata

c) two way bounded automata

d) both b and c

4) which is not a memory management scheme?

a) buddy system

b) swapping

c) monitors

d) paging     Ans : c

5) qn. on karnaugh map for simplifying boolean expressions


           - 1 1 -

           1 - - 1

           1 - - 1

           - 1 1 -

      karnaugh map

6) qn. on nand gates .

7) context sensitive grammar

8) An identifier can start with a letter followed by any number of letter

or digits .

ans: L.(LUD)*

9) 8MB total memory, 256 k cache , 4k is block size. direct mapping

how many different physical memory blocks can be mapped on to the cache.

a) 64 b) 256 c) 128

10) CSMA/CD is used in

a) token ring


d) ethernet

 Ans : d

11)  In TCP/IP header , checksum contains

a) sum of all the words

b) ones complement of the data

c) ones complement of the sum of all the words

d) ones complement of the sum in ones complement

Ans : d

12) Max no of Acknowledgements for a 4 bit sequence number in a

sliding window protocol.

13)   which is a good way of representing varaibles in recursion

a) local variables

b) static varaibles

c) global variables

14) c programs

    func() {

       static int i = 10;




 what is the value of i if the function is called twice ?

Ans : 11

15)   Qn. on pointers .

16)  given page table,page size and offset find the corresponding

     physical address  ?

     ans : a  (3*1024+576) (pageno*pagesize+offset)

17)  In a memory chip 4k size and 16bit words to be stored. No of

address and data lines reqd.

Ans) 16 data and 12 address

18) idetify in which pass of the 2 pass compiler

 1) literals

 2) address resolution

 3) listing

19)   object code not requires

 a) relocation bits

 b) external names and place where they are located

 c) absolute adress

 d) all the object codes

20) ARP

  a) MAC to  IP

  b) IP to MAC

 Ans : b

21) Qn on Balanced tree  ? A balanced tree is given  and a node is addded

at the leaf and asked to find the no of unbalanced nodes?

22) order of  Hashing time

a) 0(1)

b) 0(n2)

4) parse tree

s -> s + s ; s -> s * s ; s -> a

find the no of parse trees for a+a*a+a

a) 4

b) 5

c) 6

ans: 5

25) order of deleting an node from a linked list. (pointer is to an

arbitrary node)



26) A choclate of size nXn is given and is to be made into pices of size

1x1. At a time both horizontal and a vertical cut is done. Find the

order of complexity

a) 0(n2)

b) o(nlogn)

c) o(logn)

Ans : a

27) A directed graph is represented by adjacency list. To find the

 complexity of indegree of the node. e - edge n- vertices

a) o(e+n)

28)  No of leaf nodes given. find the no of nodes with degree 2.

29)   AX = B . A is mXn and B is mX1  and several options given like

a) there is a unique solution if rank of A is same as rank of

augumented matrix [A b]

b) there are multiple solutions

30) LXI sp,2099h

    LXI b, 2012h

    push b

31) Which of the following are false (on complexities)

32) A,B are sets. A's cardinality is m and B's is n where m < n

    how many one to one mappings can be obtained.

  a) n ^ m

  b) npm

  c) mpn

  d) mcn

33) In scduling algorithnms which are logically executed but suspended

a) preemptive

b) SJF

c)non preemptive

d) all the above

Ans : a

34) I/O redirection is

a) copying programs files through a pipe

b) input files are created

c) input file taken from existing ones

d) none

35)   symmetric multiprocessing can be done in

a) snoopy protocols

b) cache coherence

36)  dining philospheres  problems to avoid dead lock

a) 1 person will take left one and all other will take right one

b) adjacent persons should not eat concurrently

36) process states  ? which is the correct order

a)  timeout:ready -> running

b)  blocked : ready -> running

37) for converting infix expression to postfix what

    do we require

 a) operand stack

 b) operator stack


38) 0 is reprented as both and negative and positive

a) ones complement

b) twos complement

c)  two's complement has extra negative number

39) Difference between c and c++?

a)In c++ we can define variables in the middle

b)dynamic scoping

40) Which of the following is correct

a) Synchronous tranmission needs more badwidth than Asychronous.

b) Inasychronous transmission , the time is associated with data itself.....

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