13008063
Descripción
Test por Faheem Ahmed, actualizado hace más de 1 año
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Creado por Faheem Ahmed
hace más de 6 años
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Pregunta 1
Pregunta
Which of the following page replacement algorithm use the technique of replace that page which is not used in the near future?
Respuesta
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Least Recently Used
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Least Frequently Used
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Optimal Page Replacement
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First In First Out
Pregunta 2
Pregunta
A common programming construct for implementing mutual exclusion which uses condition variables is called
Respuesta
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Semaphore
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Deadlock
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Monitor
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Locking interrupts
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Threads
Pregunta 3
Pregunta
DMA stands for
Respuesta
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Direct Management access
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Direct memory access
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Dual memory access
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Data memory access
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Dual memory array
Pregunta 4
Pregunta
Which of the following is in correct order of size, smallest first?
Respuesta
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Cylinder, track, sector
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Cylinder, sector, track
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Sector, track, cylinder
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Sector, cylinder, track
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Track, cylinder, sector
Pregunta 5
Pregunta
Which of the following is NOT a necessary condition for deadlock to occur?
Respuesta
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Mutual exclusion
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Hold and wait
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Wait and signal
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Circular wait
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Hold
Pregunta 6
Pregunta
The time required to move the disk head to the desired track is known as
Respuesta
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Access Time
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Track Time
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Latency Time
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Seek Time
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Block Time
Pregunta 7
Pregunta
A distributed system is a collection of processors that do not share_______.
Respuesta
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CPU
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Memory
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I/O devices
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Network
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File
Pregunta 8
Pregunta
The process of converting logical address into physical address is known as
Respuesta
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Conversion
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Displacement
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Relocation
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Transfer
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None of the above
Pregunta 9
Pregunta
In a segmentation scheme the logical memory will be divided into
Respuesta
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Pages
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Frames
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Blocks
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Cells
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Segments
Pregunta 10
Pregunta
Which of the technique is used to recover the process from starvation situation?
Respuesta
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Paging
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Aging
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Compaction
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Starvation
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Reduction
Pregunta 11
Pregunta
In Unix, dev/null
Respuesta
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Is a file
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Has write permission for all
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Is the UNIX built-in dustbin
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All of these
Pregunta 12
Pregunta
Redirection in pipes can be achieved by using
Respuesta
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>
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>>
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tee
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lpr
Pregunta 13
Pregunta
The PID of the kernel process is
Respuesta
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0
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1
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2
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undefined
Pregunta 14
Pregunta
Which of the following statements best explains a process?
Respuesta
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It is a program.
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It is a program in execution.
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It is an instance of a program in execution.
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It is a program that uses system calls.
Pregunta 15
Pregunta
An incremental backup
Respuesta
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uses more tapes
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should be done each month
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saves only files that have recently changed
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saves all files
Pregunta 16
Pregunta
In real-time operating systems, which of the following is the most suitable scheduling scheme?
Respuesta
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round-robin
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first-come-first-served
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preemptive
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random scheduling
Pregunta 17
Pregunta
If there are 32 segments, each of size 1 K byte, then the logical address should have
Respuesta
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13 bits
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14 bits
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15 bits
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16 bits
Pregunta 18
Pregunta
Which of the following refers to the associative memory?
Respuesta
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Address of the data is generated by the CPU
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Address of the data is supplied by the users.
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There is no need for an address ie the data is used as an address
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Data are accessed sequentially
Pregunta 19
Pregunta
Mutual exclusion problem occurs between
Respuesta
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two disjoint processes that do not interact
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processes that share resources
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processes that do not use the same resource
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None of these
Pregunta 20
Pregunta
Kernel is
Respuesta
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considered as critical part of operating system.
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software which monitors operating system.
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set of primitive functions upon which rest of operating system functions are built up.
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none of the above.
Pregunta 21
Pregunta
Which of the following page replacement algorithms suffers from Belady`s anomaly?
Respuesta
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Optimal replacement
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LRU
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FIFO
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Both optimal replacement and FIFO
Pregunta 22
Pregunta
Locality of reference implies that the page reference being made by a process
Respuesta
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will always be to the page used in previous page refernce
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is likely to be one of the pages used in the last few page references
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will always be one of the pages existing in memory
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will always lead to a page fault
Pregunta 23
Pregunta
The time of admission of job to ready queue to completion is_______
Respuesta
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Turnaround time
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Burst time
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Response time
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None of the above
Pregunta 24
Pregunta
which of the following is the command for the searching a pattern in a file
Respuesta
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find
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grep
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lookup
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none
Pregunta 25
Pregunta
When fork() is given
Respuesta
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It creats a child process
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Allocate slot in process table
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returns 0 to parent & ID to child
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All of the above
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