Computer Knowledge
Computer Memory and Storage
2,121 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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Cache memory
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Main memory
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Magnetic memory
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Memory address register
D
Correct answer
Explanation
MAR holds the address information of the data, which has to be fetched from the memory.
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4.7 GB
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9.5 GB
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17 GB
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8.5 GB
D
Correct answer
Explanation
This is correct, because the size of single-sided, single-layered DVD is 4.7 GB. Therefore, the size of this DVD will be just double of it.
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BIOS chip
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CMOS chip
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RAM
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Motherboard
D
Correct answer
Explanation
CMOS battery is installed on the motherboard because there is a particular socket made for on-the-motherboard, which helps in showing the date and time on the system.
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Speedy memory
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Bubble memory
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Write only memory
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Flash memory
D
Correct answer
Explanation
MP3 players use non-volatile storage known as flash memory to store music files. This allows data to be retained even when the power is turned off.
B
Correct answer
Explanation
Optical disks, such as CDs and DVDs, store data along a single continuous track that winds from the center outward in a spiral shape.
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primary
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secondary
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main
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none of these
B
Correct answer
Explanation
Magnetic tape is a sequential access medium used primarily for backups and archiving, classifying it as a secondary storage device.
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memory
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magnetic
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optical
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none of these
C
Correct answer
Explanation
CD-ROM (Compact Disc Read-Only Memory) uses optical technology, where a laser reads data from the disk surface.
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one sector
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two sectors
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two or more sectors
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none of these
C
Correct answer
Explanation
In disk storage, a block of data is typically larger than a single physical sector, so it is stored across two or more sectors to accommodate the data size.
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Terabyte
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Gigabyte
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Kilobyte
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Megabyte
C
Correct answer
Explanation
The order of memory sizes from smallest to largest is: Kilobyte, Megabyte, Gigabyte, Terabyte. Therefore, Kilobyte is the smallest.
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Time required to locate and retrieve stored data
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Time required to locate the lost data
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Time required to delete specific data on a certain memory location
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None of the above
A
Correct answer
Explanation
Access time is the time interval between the request for data and the moment the data is actually available for use.
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DDR SDRAM
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SDRAM
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FPM DRAM
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RDRAM
B
Correct answer
Explanation
SDRAM (Synchronous DRAM) is designed to synchronize with the system clock, allowing it to manage memory access more efficiently than older asynchronous DRAM types.
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Flash memory
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PROM
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EEPROM
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EPROM
D
Correct answer
Explanation
EPROM (Erasable Programmable Read-Only Memory) can be erased by exposing the chip to strong ultraviolet light through a quartz window.
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PROM
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Flash memory
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EAROM
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EEPROM
D
Correct answer
Explanation
EEPROM (Electrically Erasable Programmable Read-Only Memory) allows individual bytes to be erased and rewritten using an electric field, without needing to remove the chip.
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Cache memory
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RAM
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Hard disk
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Flash memory
A
Correct answer
Explanation
Cache memory is a small, high-speed memory located close to or inside the processor, making it the most accessible memory for the CPU.
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SDRAM
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Cache memory
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Read only Memory
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Hard disk
B
Correct answer
Explanation
Cache memory is integrated directly into or very near the CPU to provide extremely fast access times. Because of this speed and the specialized manufacturing process required, it has the highest cost per bit compared to main memory or secondary storage.