Basic Operating System MCQ
Basic Operating System MCQ
131. Virtual memory is __________.
- An extremely large main memory
- An extremely large secondary memory
- An illusion of extremely large main memory
- A type of memory used in super computers.
132. The kernel keeps track of the state of each task by using a data structure called __
- Process control block
- User control block
- Memory control block
- None of the above
133. A binary semaphore
- has the values one or zero
- is essential to binary computers
- is used only for synchronisation
- is used only for mutual exclusion
134. _________ page replacement alogorithm suffers from Belady's anamoly.
- LRU
- MRU
- FIFO
- LIFO
135. A program at the time of executing is called ________.
- Dynamic program
- Static program
- Binded Program p
- A Process
136. _________ is a high speed cache used to hold recently referenced page table entries a part of paged virtual memory
- Translation Lookaside buffer
- Inverse page table
- Segmented page table
- All the above
137. If you don¿t know which version of MS-DOS you are working with, which command will you use after booting your operating system ?
- Format command
- FAT command
- VER command
- DISK command
138. _______ OS pays more attention on the meeting of the time limits.
- Distributed
- Network
- Real time
- Online
139. A process said to be in ___________ state if it was waiting for an event that will never occur.
- Safe
- Unsafe
- Starvation
- Dead lock
140. The removal of process from active contention of CPU and reintroduce them into memory later is known as ____________.
- Interrupt
- Swapping
- Signal
- Thread