Which of the following features of UNIX may be used for inter process communication?
A. | Signals |
B. | Pipes |
C. | Semaphore |
D. | All of these |
Option: D Explanation : Click on Discuss to view users comments. |
In a system, if 5 people are currently using the vi editor. then the number of corresponding processes will be
A. | 1 |
B. | 5 |
C. | 2 |
D. | 0 |
Option: B Explanation : Click on Discuss to view users comments. |
The command echo welcome > /dev / tty
A. | Echoes welcome in all the terminals that are switched on. |
B. | Echoes welcome in all the terminals that are logged on. |
C. | Echoes welcome only in the terminal in which it is run. |
D. | Both (a) and (c) |
Option: D Explanation : Click on Discuss to view users comments. |
dev/null
A. | Is a file |
B. | Has write permission for all |
C. | Is the UNIX built-in dustbin |
D. | All of these |
Option: D Explanation : Click on Discuss to view users comments. |
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