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Thursday, 17 January 2019

Information Technology (Questions & Answers ) - 47

Information Technology (Questions & Answers ) - 47

1021. The disk's surface is divided into a number of invisible concentric circles called:
Tracks 

1022. COBOL is an acronym for :
Common Business Oriented Language

1023. A mechanism for arranging controlled access to a shared resource is : 
Lock-out

1024. VLSI Stands for ----------: 
Very Large Scale Integration

1025. Which output device is known as Soft Copy Output device :
Monitor 

1026. A ---- is a group of computers and network devices connected together, usually within the same building: 
LAN (local area network)

1027. Network of Networks : 
Internet

1028. ---------is a type of cyber crime in which data is altered as it is entered into a computer system: 
Data diddling

1029. How many Toggle keys are there in a keyboard?
Three 

Generation of Computer

1030. First Generation (1940-56) 
• Technology was the use of vacuum tubes in electronic circuit.
• internal operating speed (IOS) was millisec­onds.
• Operating systems (OS) were batch processing. 
• Machine codes & electric boards were the lan­guages. 
• Examples- UNIVAC-I, IBM-701. 

1031. Second Generation (1957-63) 
• Technology was the use of transistor and diodes. 
• ros was microseconds
• OS was Batch processing. 
• Languages were assembly language & high level language. 
• Examples- UNIVAC-1004, IBM-1401. 

1032. Third Generation (1964-71) 
• Technology was the use of integrated circuits.
• I OS was nano seconds 
• OS was time sharing.
• Languages were High Level Languages like FORTRAN, COBOL & BASIC.
• E:xamJ?les - UNIVAC-1100, IBM-360, PDP-8 . 

1033. Fourth Generation (1971-present) 
• Technology-was the use of large integrated circuits. 
• IOS was in picoseconds
• OS were Dos & Windows.
• Languages were high level languages like Java, C++ & Python.
• Examples - ALTAIR-8800, IBM-370. 

1034. Fifth Generation 
• Artificial intelligence is the major characteristic. It i's the realm of programming where devices are able to think & react to the environment around them . 
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