MCQ IN COMPUTER SCIENCE & ENGINEERING

COMPUTER SCIENCE AND ENGINEERING

OPERATING SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a virtual memory?
A
Primary memory located on the computer
B
Part of the operating system to processes theinstruction
C
Temporary memory used to extended system memory
D
None of the above
Explanation: 

Detailed explanation-1: -Virtual memory is a common technique used in a computer’s operating system (OS). Virtual memory uses both hardware and software to enable a computer to compensate for physical memory shortages, temporarily transferring data from random access memory (RAM) to disk storage.

Detailed explanation-2: -Virtual memory is temporary memory. The size of the virtual memory storage depends on the addressing scheme used by an OS and the available secondary memory. The main advantage of virtual memory is that an OS can load programs larger than its physical memory.

Detailed explanation-3: -Virtual memory is a form of logical memory. Logical memory is read by computers as primary memory, but it exists on a local drive and isn’t directly accessed by the CPU.

Detailed explanation-4: -Virtual memory is a feature of an operating system that enables a computer to be able to compensate for shortages of physical memory by transferring pages of data from random access memory to disk storage. This process is done temporarily and is designed to work as a combination of RAM and space on the hard disk.

Detailed explanation-5: -Apart from the physically installed memory, a computer also has some extra memory that is known as virtual memory. It is a storage scheme that allows the secondary memory to be addressed as a part of main memory. It is a part of the hard disk, set up to copy the RAM.

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