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Question Detail
Which is single user operating system
- MS-DOS
- UNIX
- XENIX
- LINUX
Answer: Option A
1. Which technique is used by operating systems to execute several programs concurrently by switching back and forth
- Partitioning
- Multitasking
- Windowing
- Paging
Answer: Option C
2. Dirty bit is used to show
- Page with corrupted data
- Wrong page in memory
- Page that is modified after being loaded in the cache memory
- page that is less frequently accessed
Answer: Option C
3. A public key encryption system
- Allows only the correct sender to decode the data
- Allows only the correct receiver to decode the data
- Allows anyone to decode the data
- none of above
Answer: Option B
4. Which one is true
- The linkage editor is used to edit programs which have to later link together
- The linkage editor links object module during compiling
- The linkage editor links objects modules and resolves external references between them before loading
- none of above
Answer: Option C
5. A thread is
- lightweight process where the context switching is low
- lightweight process where the context swithching is high
- used to speed up paging
- used in dead locks
Answer: Option A
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