Operating systems concept MCQ Test 45

By | October 3, 2017

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UGC-NET/GATE Multiple Choice Questions for Operating System.

Question 1
I/O modules performs requested action on
A
Programmed I/O
B
Direct Memory Access (DMA)
C
Interrupt driven I/O
D
I/O devices
Question 2
In a particular Unix OS, each data block is of size 1024 bytes, each node has 10 direct data block addresses and three additional addresses: one for single indirect block, one for double indirect block and one for triple indirect block. Also, each block can contain addresses for 128 blocks. Which one of the following is approximately the maximum size of a file in the file system?
A
512 MB
B
2GB
C
8GB
D
16GB
Question 3
In processes, access control implements a
A
Security Policy
B
Access Policy
C
Control Policy
D
Check Policy
Question 4
The second set of the three permissions (r-) indicates that
A
group has read permission only
B
other has read permission only
C
owner has read permission only
D
group has write permission only
Question 5
In asymmetric encryption
A
same key is used for encryption and decryption
B
different keys are used encryption and decryption
C
no key is required for encryption and decryption
D
none of the mentioned
There are 5 questions to complete.
Please report wrong answer

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