Operating System Mock Test 7

10%

Question 1 of 10

1. What is the disadvantage of the two level directory structure?

it does not solve the name collision problem

it isolates users from one another

it does not isolate users from one another

it solves the name collision problem

Question 1 of 10

Question 2 of 10

2. File type can be represented by ____________

file identifier

file extension

file name

none of the mentioned

Question 2 of 10

Question 3 of 10

3. The index contains ____________

pointers to each page

pointers to the various blocks

all of the mentioned

names of all contents of file

Question 3 of 10

Question 4 of 10

4. The direct access method is based on a ______ model of a file, as _____ allow random access to any file block.

magnetic tape, magnetic tapes

all of the mentioned

disk, disks

tape, tapes

Question 4 of 10

Question 5 of 10

5. The minimum number of page frames that must be allocated to a running process in a virtual memory environment is determined by ____________

the instruction set architecture

physical memory size

number of processes in memory

page size

Question 5 of 10

Question 6 of 10

6. In the tree structured directories _____________

the tree has the stem directory

the tree has the root directory

the tree has the leaf directory

all of the mentioned

Question 6 of 10

Question 7 of 10

7. The UNIX sytem uses a/an ________ stored at the beginning of a some files to indicate roughly the type of file.

virtual number

identifier

extension

magic number

Question 7 of 10

Question 8 of 10

8. What is the mounting of file system?

crating of a filesystem

removing the portion of the file system into a directory structure

deleting a filesystem

attaching portion of the file system into a directory structure

Question 8 of 10

Question 9 of 10

9. What is the reason for using the LFU page replacement algorithm?

all of the mentioned

a less used page has more chances to be used again

it is extremely efficient and optimal

an actively used page should have a large reference count

Question 9 of 10

Question 10 of 10

10. The implementation of the LFU and the MFU algorithm is very uncommon because ____________

all of the mentioned

they are too complicated

they are expensive

they are optimal

Question 10 of 10