Computer Fundamental Miscellaneous - Study Mode

[#421] A pen shaped device which can sense light, and is used to point at spots on a video screen.
Correct Answer

(B) Light pen

Explanation

Solution: Light Pen : A light pen is a light-sensitive computer input device, basically a stylus, that is used to select text, draw pictures and interact with user interface elements on a computer screen or monitor. The light pen works well with CRT monitors because of the way such monitors scan the screen, which is one pixel at a time, giving the computer a way to keep track of the expected scanning time by the electron beam and infer the pen's position based on the latest timestamp of the scanning.

[#422] A notation used to express clearly on algorithm is known as
Correct Answer

(A) Algorithmic language

Explanation

Solution: A notation used to express clearly on algorithm is known as Algorithmic language.

[#423] Compression of digital data for efficient storage is
Correct Answer

(C) Packing

Explanation

Solution: Compression of digital data for efficient storage is Packing, encoding or converting the bits structure of data in such a way that it consumes less space on disk. It enables reducing the storage size of one or more data instances or elements. Data compression is also known as source coding or bit-rate reduction.

[#424] An operating system intended for use on microprocessor based systems that support a single user is
Correct Answer

(D) CP/M

Explanation

Solution: CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, is a mass-market operating system created for Intel 8080/85-based microcomputers by Gary Kildall of Digital Research, Inc.

[#425] Which programming language is based on Algol 60.
Correct Answer

(D) SIMULA

Explanation

Solution: Simula Programming Language : Simula is the name of two simulation programming languages, Simula I and Simula 67, developed in the 1960s at the Norwegian Computing Center in Oslo, by Ole-Johan Dahl and Kristen Nygaard. Syntactically, it is a fairly faithful superset of ALGOL 60, also influenced by the design of Simscript.