Computer Knowledge
Computer Memory and Storage
2,477 Questions
Computer memory and storage questions test foundational knowledge of hardware, cache mapping, and data transfer mechanisms. Key areas include Direct Memory Access, analog recording, and RAID levels. This section is essential for candidates preparing for banking and government computer proficiency tests.
Cache memory mappingDirect memory accessRAID storage levelsHard disk technologyOptical media storageMemory addresses
Computer Memory and Storage Questions
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Directories
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� devices
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� links
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None of these
B
Correct answer
Explanation
These devices are file storage in UNIX, which provides easy access to hardware devices and allows them to be used in much the same way as ordinary files.
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Hard disk
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Dynamic RAM
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Static RAM
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Cache memory
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CD and DVD
D
Correct answer
Explanation
It is the fastest memory.
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Only (i)
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Only (i) and (ii)
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Only (ii) and (iii)
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Only (i) and (iii)
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All of these
E
Correct answer
Explanation
All statements are true about storage devices.
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Built in register in processor
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Cache
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RAM
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Magnetic disks
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All of these
D
Correct answer
Explanation
Magnetic disk is slower as compared to other memories and its access time is the highest.
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msgrcv()
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semget()
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shmget()
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none of these
C
Correct answer
Explanation
A shared memory segment can be allocated, using shmget() system call.
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Fast incremental backups
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Control file
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Parameter file
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Instance creation
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Stream pool
A
Correct answer
Explanation
If you enable block change tracking, then the database automatically tracks which datafiles blocks have changed in change tracking file.
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In this mechanism, the information is stored in the virtual memory.
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In this mechanism, the information is copied in the faster storage system and can be retrieved further.
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In this mechanism, the information is copied in the temporary files.
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In this mechanism, the information is stored in the main memory.
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Both (2) and (3)
E
Correct answer
Explanation
Yes, both are true statements for the caching mechanism.
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If the allocated is slightly larger than the requested memory
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If the allocated memory is smaller than the requested memory
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If the available memory is not contiguous
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If the program's address does not end on a page boundary
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Both (3) and (4)
C
Correct answer
Explanation
The memory available is partitioned and the memory is not contiguous because it is fragmented in to little pieces.
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Program counter
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CPU registers
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Accumulator
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Process status
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Accounting information
A
Correct answer
Explanation
This option is correct, as program the counter indicates the address of the next instruction to be executed for the process.
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demand paging
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segmentation
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fragmentation
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page replacement
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page fault
A
Correct answer
Explanation
Demand paging is a method of virtual memory management. In a system that uses demand paging, the operating system copies a disk page into its physical memory, only if an attempt is made to access it. So, this option is correct.
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Segmentation
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Paging
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Paging with segmentation
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Swapping
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Demand paging
A
Correct answer
Explanation
Segmentation divides the primary memory into segments. When the dynamic memory allocation algorithm allocates some memory and a small piece is left over, which cannot be efficiently used, then the external fragmentation takes place.
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When the requested page is not loaded in the physical memory
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Due to inefficient usage of memory chunks
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Thrashing
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Mutual exclusion
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Swapping
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Segmentation
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Paging
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Demand paging
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Segmentation with paging
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Swapping
B
Correct answer
Explanation
In paging memory-management scheme, the operating system retrieves the data from secondary storage in the same-sized blocks called pages. Some space is wasted inside the memory blocks because of the restriction on the allowed size of the block, which causes internal fragmentation.
C
Correct answer
Explanation
DCE (Data Circuit-terminating Equipment) devices provide clocking and put data on the local loop (option C). DTE (Data Terminal Equipment) is the end device. DLCI is Frame Relay identifier. BRI/PRI are ISDN interface types. The DCE is responsible for clock synchronization and transmitting data onto the WAN link.
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floppy disk
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hard disk
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backing store
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magnetic tape
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punched card
C
Correct answer
Explanation
Backing store, which is also known as cache memor is used as back end storage. Yes it is the correct choice.