Test
Operating System
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Preguntas del test (25)
1Which of the following page replacement algorithm use the technique of replace that page which is not used in the near future?
- ALeast Recently Used
- BLeast Frequently Used
- COptimal Page Replacement
- DFirst In First Out
2A common programming construct for implementing mutual exclusion which uses condition variables is called
- ASemaphore
- BDeadlock
- CMonitor
- DLocking interrupts
- EThreads
3DMA stands for
- ADirect Management access
- BDirect memory access
- CDual memory access
- DData memory access
- EDual memory array
4Which of the following is in correct order of size, smallest first?
- ACylinder, track, sector
- BCylinder, sector, track
- CSector, track, cylinder
- DSector, cylinder, track
- ETrack, cylinder, sector
5Which of the following is NOT a necessary condition for deadlock to occur?
- AMutual exclusion
- BHold and wait
- CWait and signal
- DCircular wait
- EHold
6The time required to move the disk head to the desired track is known as
- AAccess Time
- BTrack Time
- CLatency Time
- DSeek Time
- EBlock Time
7A distributed system is a collection of processors that do not share_______.
- ACPU
- BMemory
- CI/O devices
- DNetwork
- EFile
8The process of converting logical address into physical address is known as
- AConversion
- BDisplacement
- CRelocation
- DTransfer
- ENone of the above
9In a segmentation scheme the logical memory will be divided into
- APages
- BFrames
- CBlocks
- DCells
- ESegments
10Which of the technique is used to recover the process from starvation situation?
- APaging
- BAging
- CCompaction
- DStarvation
- EReduction
11In Unix, dev/null
- AIs a file
- BHas write permission for all
- CIs the UNIX built-in dustbin
- DAll of these
12Redirection in pipes can be achieved by using
- A>
- B>>
- Ctee
- Dlpr
13The PID of the kernel process is
- A0
- B1
- C2
- Dundefined
14Which of the following statements best explains a process?
- AIt is a program.
- BIt is a program in execution.
- CIt is an instance of a program in execution.
- DIt is a program that uses system calls.
15An incremental backup
- Auses more tapes
- Bshould be done each month
- Csaves only files that have recently changed
- Dsaves all files
16In real-time operating systems, which of the following is the most suitable scheduling scheme?
- Around-robin
- Bfirst-come-first-served
- Cpreemptive
- Drandom scheduling
17If there are 32 segments, each of size 1 K byte, then the logical address should have
- A13 bits
- B14 bits
- C15 bits
- D16 bits
18Which of the following refers to the associative memory?
- AAddress of the data is generated by the CPU
- BAddress of the data is supplied by the users.
- CThere is no need for an address ie the data is used as an address
- DData are accessed sequentially
19Mutual exclusion problem occurs between
- Atwo disjoint processes that do not interact
- Bprocesses that share resources
- Cprocesses that do not use the same resource
- DNone of these
20Kernel is
- Aconsidered as critical part of operating system.
- Bsoftware which monitors operating system.
- Cset of primitive functions upon which rest of operating system functions are built up.
- Dnone of the above.
21Which of the following page replacement algorithms suffers from Belady`s anomaly?
- AOptimal replacement
- BLRU
- CFIFO
- DBoth optimal replacement and FIFO
22Locality of reference implies that the page reference being made by a process
- Awill always be to the page used in previous page refernce
- Bis likely to be one of the pages used in the last few page references
- Cwill always be one of the pages existing in memory
- Dwill always lead to a page fault
23The time of admission of job to ready queue to completion is_______
- ATurnaround time
- BBurst time
- CResponse time
- DNone of the above
24which of the following is the command for the searching a pattern in a file
- Afind
- Bgrep
- Clookup
- Dnone
25When fork() is given
- AIt creats a child process
- BAllocate slot in process table
- Creturns 0 to parent & ID to child
- DAll of the above
Información
- Descripción
- ThirdYear Third Year Test sobre Operating System, creado por Faheem Ahmed el 26/03/2018.
- Autor
- Faheem Ahmed
- Idioma
- English
- Visitas
- 1.203
- Etiquetas
- Valoración
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