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Mphasis Computer Awareness Placement Paper

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COMPUTER AWARENESS TEST

1.In the command scanf, h is used for

Ans. Short int

2.A process is defined as

Ans. Program in execution

3.A thread is

Ans. Detachable unit of executable code)

4.What is the advantage of Win NT over Win 95

Ans. Robust and secure

5.How is memory management done in Win95

Ans. Through paging and segmentation

6.What is meant by polymorphism

Ans. Redfinition of a base class method in a derived class

7.What is the essential feature of inheritance

Ans. All properties of existing class are derived

8.What does the protocol FTP do

Ans. Transfer a file b/w stations with user authentification

9.In the transport layer ,TCP is what type of protocol

Ans. Connection oriented

10.Why is a gateway used

Ans. To connect incompatible networks

11.How is linked list implemented

Ans. By referential structures

12.What method is used in Win95 in multitasking

Ans. Non preemptive check

13.What is meant by functional dependency

14.What is a semaphore
Ans. A method synchronization of multiple processes

15.What is the precedence order from high to low ,of the symbols ( ) ++ /

Ans.( ) , ++, /

16.Preorder of A*(B+C)/D-G

Ans.*+ABC/-DG

18. B-tree (failure nodes at same level)

19. Dense index (index record appers for every search -key in file)

20.What is the efficiency of merge sort

Ans. O(n log n)

21.A program on swaping ( 10,5 )was given (candidate cannot recollect)

22.In which layer are routers used

Ans.In network layer

23.In which layer are packets formed ( in network layer )

24.heap ( priority queue )

25.copy constructor ( constant reference )

26.Which of the following sorting algorithem has average sorting behavior --
Bubble sort,merge sort,heap sort,exchange sort

Ans. Heap sort

27.In binary search tree which traversal is used for getting ascending order values--Inorder ,post order,preorder

Ans.Inorder

28.What are device drivers used for

Ans.To provide software for enabling the hardware

29. Irrevalent to unix command ( getty)

30.What is fork command in unix

Ans. System call used to create process

31.What is make command in unix

Ans. Used forcreation of more than one file

32.In unix .profile contains

Ans. Start up program

33.In unix echo is used for ( answer C)

34.In unix 'ls 'stores contents in

Ans.inode block

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