Computer Knowledge Questions on Memory | Set – 49

Correct Answer: C. Secondary storage device

Explanation- A secondary storage device refers to any non-volatile storage device that is internal or external to the computer. It can be any storage device beyond the primary storage that enables permanent data storage.

Correct Answer – C. memory on the hard disk that the CPU uses as an extended RAM

Explanation-Virtual memory is the memory on the hard disk that the CPU uses an extended RAM.

Correct Answer – C. Firmware

Explanation-Firmware is data that is stored on a computer or other hardware device’s ROM (read-only memory) that provides instruction on how that device should operate.

Correct Answer – B. Defragmentation

Explanation- In the maintenance of file systems, defragmentation is a process that reduces the degree of fragmentation. It does this by physically organizing the contents of the mass storage device used to store files into the smallest number of contiguous regions (fragments, extents).

Correct Answer – C. Digital Versatile Disk

Explanation- Digital versatile disk is an example of an optical disk. Compact disks (CD), digital versatile/video disks (DVD) and Blu-ray disks are currently the most commonly used forms of optical disks.

Correct Answer: D. Volatile

Explanation-Volatile memory is computer storage that only maintains its data while the device is powered. Most RAM (random access memory) used for primary storage in personal computers is volatile memory.

Correct Answer – D. 1024 MB

Explanation-  Bit – A bit (short for binary digit) is the smallest unit of data in a computer. A bit has a single binary value, either 0 or 1.
❖ Byte – one byte is a group of 8 binary digits.
❖ Kilobyte – KB stands for Kilobyte. A kilobyte is 1024 bytes so 1KB equal to 1024 x 8 = 8192 binary digits.
❖ Megabyte (MB) – MB stands for Megabyte. It’s a unit of computer storage. 1 MB is equal to 1024 kilobyte (KB)
❖ Gigabyte (GB) – 1 GB is equal to 1024 MB
❖ Terabyte (TB) – 1 TB is equal to 1024 GB
❖ Petabyte (PB) – 1 PB is equal to 1024 TB

Correct Answer – B. DRAM

Explanation-Dynamic random-access memory (DRAM) is a type of random access semiconductor memory that stores each bit of data in a memory cell consisting of a tiny capacitor and a transistor, both typically based on metal-oxide-semiconductor (MOS) technology.

Correct Answer – B. 255

Explanation-A bit is the most basic unit and can be either 1 or 0. A byte is not just 8 values between 0 and 1, but 256 (28) different combinations (rather permutations) ranging from 00000000 via e.g. 01010101 to 11111111. Thus, one byte can represent a decimal number between 0(00) and 255.

Correct Answer: C. Virtual memory

Explanation- Virtual memory is a memory management technique that provides an “idealized abstraction of the storage resources that are actually available on a given machine” which “creates the illusion to users of a very large memory”.