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UGC-NET/GATE Multiple Choice Questions for Operating System.
I/O modules performs requested action on
Direct Memory Access (DMA)
Interrupt driven I/O
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?
In processes, access control implements a
The second set of the three permissions (r-) indicates that
group has read permission only
other has read permission only
owner has read permission only
group has write permission only
In asymmetric encryption
same key is used for encryption and decryption
different keys are used encryption and decryption
no key is required for encryption and decryption
none of the mentioned
There are 5 questions to complete.