PREVIOUS YEAR SOLVED PAPERS - July 2016 Paper 3
51. Which of the following information about the UNIX file system is not correct?
- A
Super block contains the number of i-nodes, the number of disk blocks, and the start of the list of free disk blocks.
- B
An i-node contains accounting information as well as enough information to locate all the disk blocks that holds the file’s data.
- C
Each i-node is 256-bytes long.
- D
All the files and directories are stored in data blocks.
- Option : C
- Explanation : UNIX file system:
- Super block contains the number of i-nodes, the number of disk blocks, and the start of the list of free disk blocks.Correct
- An i-node contains accounting information as well as enough information to locate all the disk blocks that holds the file’s data.Correct
- All the files and directories are stored in data blocks.Correct
- Each i-node is 256-bytes long.Incorrect.It is 128 byte long.
So, option (C) is correct.
52. Which of the following option with reference to UNIX operating system is not correct?
- A
INT signal is sent by the terminal driver when one types and it is a request to terminate the current operation.
- B
TERM is a request to terminate execution completely. The receiving process will clean up its state and exit.
- C
QUIT is similar to TERM, except that it defaults to producing a core dump if not caught.
- D
KILL is a blockable signal.
- Option : D
- Explanation : In UNIX operating system:
- INT signal is sent by the terminal driver when one types and it is a request to terminate the current operation.Correct
- TERM is a request to terminate execution completely. The receiving process will clean up its state and exit.Correct
- QUIT is similar to TERM, except that it defaults to producing a core dump if not caught.Correct
- kILL is not a blockable signal.
So, option (D) is correct.
- Option : D
- Explanation : We have 16 x 16 grid, There will be (M - 1) * (N - 1) hops for M * N grid. In the given question M = N. # of hops = (M - 1) * (M - 1) = 2 * (M - 1) = 2 * (16 - 1) = 2 * 15 = 30 hops. So, option (D) is correct.
- Option : B
- Explanation : According to given question 1K RPC takes - 1.5 * 32 + 1.0 = 49.0 msec 32 1K RPC will take: 1.5 * 32 + 1.0 * 32 = 80.0 msec So, option (B) is correct.
