PAPER: MPHASIS PLACEMENT PAPER (OPERATING SYSTEM)
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. Redefinition 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 FTP protocol do
Ans. Transfer a file between 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
17. B-tree (failure nodes at same level)
18. Dense index (index record appers for every search -key in file)
19.What is the efficiency of merge sort
Ans. O(n log n)
20.A program on swapping (10,5)
21.In which layer are routers used
Ans. In network layer
22.In which layer are packets formed (in network layer)
23.heap (priority queue)
24.copy constructor (constant reference)
25.Which of the following sorting algorithm has average sorting behavior -- Bubble sort, merge sort, heap sort, exchange sort
Ans. Heap sort
26.In binary search tree which traversal is used for getting ascending order values--Inorder ,post order,preorder
Ans. Inorder
27.What are device drivers used for to provide software for enabling the hardware
28. Irreverent to Unix command (getty)
29.What is fork command in Unix
Ans. System call used to create process
30.What is make command in Unix
Ans. Used for creation of more than one file
31.In Unix .profile contains
Ans. Start up program
32.In Unix echo is used for (answer C)
33.In Unix 'ls 'stores contents in
Ans .inode block
