Operating System - Study Mode

[#346] A page fault
Correct Answer

(C) is an access to a page not currently in memory

Explanation

Solution: A page fault (sometimes called #PF, PF or hard fault) is a type of exception raised by computer hardware when a running program accesses a memory page that is not currently mapped by the memory management unit (MMU) into the virtual address space of a process.

[#347] An algorithm is best described as
Correct Answer

(B) A step by step procedure for solving a problem

Explanation

Solution: An algorithm is best described as a step by step procedure for solving a problem

[#348] The process of transferring data intended for a peripheral device into a disk (or intermediate store) so that it can be transferred to peripheral at a more convenient time or in bulk, is known as
Correct Answer

(B) spooling

Explanation

Solution: The process of transferring data intended for a peripheral device into a disk (or intermediate store) so that it can be transferred to peripheral at a more convenient time or in bulk, is known as 'spooling'.

[#349] Block caches or buffer caches are used
Correct Answer

(A) to improve disk performance

Explanation

Solution: Cache stores copy of the data. Cache is in processor and can be also implemented with ram and disk. Buffer can be hardware as well as software buffer. Cache is a fast disk and hence it is hardware.

[#350] The action of parsing the source program into the proper syntactic classes is known as
Correct Answer

(B) lexical analysis

Explanation

Solution: The action of parsing the source program into the proper syntactic classes is known as lexical analysis