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
A
Correct answer
Explanation
The current running configuration and the routing tables are loaded into RAM.
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Contents in RAM will be erased.
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Contents in RAM will be ignored.
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Contents in NVRAM will be erased.
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Contents in NVRAM will be ignored.
D
Correct answer
Explanation
Configuration register 0x2142 tells the router to ignore the contents of NVRAM (startup-config) during boot. This is used in password recovery procedures to bypass the startup configuration, allowing access to the router without knowing the enable password.
C
Correct answer
Explanation
Cisco IOS is stored in Flash memory, which is non-volatile EEPROM. During bootup, IOS is copied from Flash to RAM where it actually runs. ROM contains bootstrap code, NVRAM stores startup-config, and RAM runs the operating system but doesn't store it persistently.
B
Correct answer
Explanation
The IOS image is stored in flash memory, the contents in flash can be updated using a TFTP server.
C
Correct answer
Explanation
Flash memory - Either an EEPROM or a PCMCIA card, Flash memory stores fully functional IOS images and is the default location where the router gets its IOS at boot time. Flash memory also can be used to store any other files, including configuration files.
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free( )
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malloc( )
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realloc( )
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Calloc( )
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Garbage
B
Correct answer
Explanation
This function allocates the memory and returns the pointer to the allocated memory.
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Adding more components to your network.
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Protecting your data by copying it from the original source to a different destination.
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Filtering old data from the new data.
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Accessing data on the tape.
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None of the above
B
Correct answer
Explanation
Yes it's correct choice.Yes when power cuts are there suddenly the data is lost . So it is preferred to save the data into another location .
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Byte
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Record
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Address
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Instruction
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None of the above
C
Correct answer
Explanation
Yes it's correct . By address we can identify the storage location.
C
Correct answer
Explanation
NTFS (New Technology File System) is a proprietary file system developed by Microsoft Corporation for its Windows NT line of operating systems, beginning with Windows NT 3.1 and Windows 2000, including Windows XP, Windows Server 2003, and all their successors to date.
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Increasing SORT_AREA_SIZE
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Decreasing SORT_AREA_RETAINED_SIZE
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Increasing the SORT_MEMORY_ALLOCATED parameter
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Altering SORT_AREA_SIZE dynamically based on available memory within SGA_MAX_SIZE
A
Correct answer
Explanation
SORT_AREA_SIZE determines how much memory is allocated for each sort operation. Increasing this parameter allows more sorts to complete entirely in memory, reducing the need to spill to disk (which is much slower). SORT_AREA_RETAINED_SIZE controls memory retained after sort completion and doesn't affect disk sort frequency.
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Redundancy through striping
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Performance through mirroring
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Redundancy through mirroring
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Performance through striping
C
Correct answer
Explanation
The correct answer is C because ASM disk groups provide redundancy through mirroring - they can maintain multiple copies of data (normal/high redundancy) to protect against disk failures. Option A is incorrect because striping is for performance, not redundancy. Option B is incorrect because mirroring provides redundancy, not performance. Option D is incorrect because striping improves performance, not redundancy.
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X-rays
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Microwaves
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Ultraviolet rays
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Visible light
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Gamma radiations
C
Correct answer
Explanation
Once programmed, an EPROM can be erased by exposing it to strong ultraviolet light source (such as from a mercury-vapor light). EPROMs are easily recognizable by the transparent fused quartz window in the top of the package, through which the silicon chip is visible, and which permits exposure to UV light during erasing.
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RAM
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ROM
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Cache memory
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Control store
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Hard disk
D
Correct answer
Explanation
The microcode usually does not reside in the main memory, but in a special high speed memory, called the control store. It might be either read-only or read-write memory. In the latter case the microcode would be loaded into the control store from some other storage medium as part of the initialization of the CPU, and it could be altered to correct bugs in the instruction set, or to implement new machine instructions.
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To exploit the temporal locality of reference
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To read more data into the memory
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Belady's anomaly
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To reduce the miss penalty
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To reduce the hit ratio
A
Correct answer
Explanation
Temporal locality: If at one point in time a particular memory location is referenced, then it is likely that the same location will be referenced again in the near future. There is a temporal proximity between the adjacent references to the same memory location. In this case it is common to make efforts to store a copy of the referenced data in special memory storage, which can be accessed faster.
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Buffer cache
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Library cache
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Data dictionary cache
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Redo log buffer cache
C
Correct answer
Explanation
The data dictionary cache is part of the System Global Area (SGA) that stores data dictionary information including user privileges, object definitions, and security attributes. When a server process needs to validate user privileges, it queries this cached information rather than accessing the physical data dictionary tables on disk, which significantly improves performance. The buffer cache stores database blocks, the library cache holds SQL and PL/SQL code, and the redo log buffer stores redo entries - none of these contain privilege validation data.