Memory Management 61-72

1.       The problem of thrashing is effected scientifically by ________.

1 Program structure

2 Program size

3 Primary storage size

4 None of the above

                Ans ) 1

2.       The mechanism that bring a page into memory only when it is needed is called _____________

1 Segmentation

2 Fragmentation

3 Demand Paging

4 Page Replacement

                Ans ) 3

3.        A thread

1 is a lightweight process where the context switching is low

2 is a lightweight process where the context switching is high

3 is used to speed up paging

4 none of the above

                Ans ) 1

4.        A tree structured file directory system

1 allows easy storage and retrieval of file names

2 is a much debated unnecessary feature

3 is not essential when we have millions of files

4 none of the above

                Ans ) 1

5.       Which of the following disk scheduling techniques has a drawback of starvation ?

1 SCAN

2 SSTF

3 FCFS

4 LIFO

                Ans ) 2

6.        A set of resources' allocations such that the system can allocate resources to each process in some order, and still avoid a deadlock is called ________.

1 Unsafe state

2 Safe state

3 Starvation

4 Greedy allocation

                Ans ) 2

7.       What is the first step in performing an operating system upgrade ?

1 Partition the drive

2 Format the drive

3 Backup critical data

4 Backup old operating system

                Ans ) 3

8.       In a virtual memory environment

1 segmentation and page tables are stored in the cache and do not add any substantial overhead

2 slow down the computer system considerable

3 segmentation and page tables are stored in the RAM

4 none of the above

                Ans ) 3

9.        If all page frames are initially empty, and a process is allocated 3 page frames in real memory and references its pages in the order 1 2 3 2 4 5 2 3 2 4 1 and the page replacement is FIFO, the total number of page faults caused by the process will be __________.

1 10

2 7

3 8

4 9

                Ans ) 4

10.   Which of the following is crucial time while accessing data on the disk?

1 Seek time

2 Rotational time

3 Transmission time

4 Waiting time

                Ans ) 1

11.   In the ___________ method of data transfer, the participation of the processor is eliminated during data transfer.

1 Buffering

2 Caching

3 Direct Memory Access

4 Indirect Memory Access

                 Ans ) 3

12.   Data reside in file on disk under DOS environment, which of the following file name is invalid ?

1 OSCONCEPTS.doc

2 RAW

3 COMPAQ.BOOK

4 JUMPSTART.BOS

                Ans ) 3