Basic Operating System MCQ
Basic Operating System MCQ
241. The wait operation
- Decrements the semaphore value
- Inrements the semaphore value
- Fixes the semaphore value
- None of these
242. In semaphore, the process executing the wait is blocked if
- The semaphore value becomes negative
- The semaphore value become positive
- The semaphore value becomes non-positive
- The semaphore value becomes non-negative
243. In semaphore the process blocked by wait operation is unblocked if
- Semaphore value becomes non- negative
- Semaphore value becomes non-posiive
- Semaphore value is negative
- Semaphore value is positive
244. The compaction is the technique in memory management that is used to over come
- Internal fragmentation
- External fragmentation
- Both (A) and (B)
- None of these
245. Physical address (absolute address ) in memory partitioning is
- Actual location in main memory
- A reference to memory location independent of current assignment
- A logical address
- None of these
246. The frame
- Can hold exactly one page of data
- Can hold more than one page of data
- Can hole two page of data
- None of these
247. The page table that is maintained by operating system
- Shows frame loation for each page of the process
- Shows actural address in main memory
- Referrer memory location to memory
- None of these
248. Match the following pairs
A. Logical address
(1) An actual location in main memory
B. Relative address
(2) An address is expressed as a location relative to some known point.
C. A memory location independent of the current assignment of data to memory
A. Logical address
(1) An actual location in main memory
B. Relative address
(2) An address is expressed as a location relative to some known point.
C. A memory location independent of the current assignment of data to memory
- A-3, B-2, C-1
- A-2, B-1, C-3
- A-3, B-1, C-2
- A-1, B-2, C-3
249. The resident set of process is
- A process that are actually in main memory at anytimes
- A process that are actually in virtual memory at any time.
- A proces that are actually in disk
- None of these
250. Physical address in memory management is
- Actual location in main memory
- Memory location independent of current assigment of data tol memory
- Memory location dependent to some known point.
- None of these