💻 Computer Awareness कंप्यूटर ज्ञान
156 exam-ready facts · 156 MCQs
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101
3D optical data storage technology significantly increases data capacity by recording information in multiple distinct layers within the optical disc.
This uses volumetric recording techniques.
Asked in SSC CGL 2017 (17 Aug, Shift 2)
Practice (1)
Q101_______ optical data<br>storage is a technology where data is stored in multiple layers in the optical<br>disc.
Show answer
Correct answer: A — 3D
Answer: (A)
3D optical data storage stores data in multiple layers. -
102
A router operates at the network layer (Layer 3) of the OSI model, forwarding data packets between computer networks.
Routers use IP addresses to direct traffic efficiently.
Asked in SSC CGL 2016 (7 Sep, Shift 1)
Practice (1)
Q102In the following list of devices which device is used in network layer?
Show answer
Correct answer: B — Router
Answer: (B)
The correct option is (B). -
103
Charles Babbage designed the Analytical Engine, the first mechanical computer that served as the prototype for modern computers.
It featured arithmetic logic, control flow, and integrated memory.
Asked in SSC CGL 2017 (20 Aug, Shift 3)
Practice (1)
Q103Who created the first mechanical computer, which proved to be the prototype for future computers?
Show answer
Correct answer: D — Charles Babbage
Answer: (D)
Charles Babbage designed the Analytical Engine, the prototype of modern computers. -
104
Multicasting is the delivery of information to a group of destination stations simultaneously in a single transmission.
It is efficient for streaming media to multiple recipients.
Asked in SSC CGL 2016 (7 Sep, Shift 2)
Practice (1)
Q104Sending a frame to a group of stations is known as __________
Show answer
Correct answer: C — Multicasting
Answer: (C)
The correct option is (C). -
105
A string in programming is a collection or sequence of characters including letters, digits, and punctuation symbols.
Strings are treated as data types in almost all programming languages.
Asked in SSC CGL 2017 (20 Aug, Shift 2)
Practice (1)
Q105A _______ is a collection of letters, digits, punctuation characters, and so on.
Show answer
Correct answer: B — String
Answer: (B)
A string is a sequence of characters: letters, digits, punctuation and so on. -
106
Notepad is a basic plain text editor included with all versions of Microsoft Windows that allows creation of simple documents.
Files created in Notepad typically use the .txt extension.
Asked in SSC CGL 2017 (19 Aug, Shift 2)
Practice (1)
Q106Notepad' is a text editor in which of the following operating<br>systems?
Show answer
Correct answer: A — Windows
Answer: (A)
Notepad is the text editor bundled with Microsoft Windows. -
107
An array is a data structure consisting of a collection of elements of the same data type identified by a common name.
Array elements are stored in contiguous memory locations.
Asked in SSC CGL 2017 (21 Aug, Shift 3)
Practice (1)
Q107_____________ is a collection of data values of same types having a common name.
Show answer
Correct answer: C — Array
Answer: (C)
An array is a collection of values of the same type under one name. -
108
The MIN() function in Microsoft Excel evaluates a provided list of numeric arguments and returns the smallest value.
It is widely used for finding the lowest scores or prices.
Asked in SSC CGL 2017 (19 Aug, Shift 3)
Practice (1)
Q108In Microsoft Excel, the _______() function returns the<br>smallest value among the values passed as arguments.
Show answer
Correct answer: C — MIN
Answer: (C)
MIN() returns the smallest value in Excel. -
109
In token ring networks, a token is a small control message or frame passed from one station to another to grant transmission rights.
Only the station holding the token can transmit data.
Asked in SSC CGL 2016 (6 Sep, Shift 1)
Practice (1)
Q109In networks, a small message used to pass between one station to another is known as ____________
Show answer
Correct answer: A — Token
Answer: (A)
The correct option is (A). -
110
Piggybacking is a technique where a node delays sending an outgoing acknowledgement temporarily so it can be attached to the next outgoing data frame.
It optimizes network bandwidth by reducing extra control packets.
Asked in SSC CGL 2016 (11 Sep, Shift 3)
Practice (1)
Q110In IT, the technique of delaying outgoing acknowledgements temporarily is known as
Show answer
Correct answer: C — Piggybacking
Answer: (C)
The correct option is (C). -
111
Open-source software refers to programs whose source code is made freely available to the public to view, modify, and distribute.
Linux and Python are examples of open-source projects.
Asked in SSC CGL 2017 (20 Aug, Shift 3)
Practice (1)
Q111_________ software are freely available and can be edited and customized by anyone.
Show answer
Correct answer: B — Open Source
Answer: (B)
Open source software is freely available, and anyone can modify it. -
112
In ATM, 'T' stands for Teller, representing an Automated Teller Machine used for banking transactions.
It allows customers to perform financial transactions without a human cashier.
Asked in SSC CGL 2020 (7 Mar, Shift 1)
Practice (1)
Q112What does 'T' stand for in ATM?
Show answer
Correct answer: C — Teller
Answer: (C)
ATM = Automated Teller Machine. -
113
The 'Increase Indent' command in Microsoft Word moves the selected paragraph further away from the left margin.
It increases the distance between the text and the margin.
Asked in SSC CGL 2017 (21 Aug, Shift 1)
Practice (1)
Q113In Microsoft Word, _______ allows us to move selected<br>paragraphs to the right.
Show answer
Correct answer: B — Increase Indent
Answer: (B)
Increase Indent moves the selected paragraph to the right. -
114
LAN stands for Local Area Network, which connects computers within a limited area like a residence, school, or office building.
LANs typically offer high data-transfer rates over short distances.
Asked in SSC CGL 2017 (8 Aug, Shift 1)
Practice (1)
Q114What is the full form of 'LAN'?
Show answer
Correct answer: C — Local Area Network
Answer: (C)
LAN stands for Local Area Network. -
115
The 'Decrease Indent' command in Microsoft Word moves the selected paragraph closer to the left margin.
It reduces the indentation space on the left side.
Asked in SSC CGL 2017 (21 Aug, Shift 2)
Practice (1)
Q115In Microsoft Word, _______ allows us to move selected<br>paragraphs to the left.
Show answer
Correct answer: A — Decrease Indent
Answer: (A)
Decrease Indent moves the paragraph to the left. -
116
An IPv4 address is a 32-bit numerical label assigned to each device connected to a computer network.
IPv6 addresses are 128-bit numbers to accommodate more devices.
Asked in SSC CGL 2017 (10 Aug, Shift 1)
Practice (1)
Q116An IP address is _____ bit number.
Show answer
Correct answer: B — 32
Answer: (B)
An IPv4 address is a 32-bit number. -
117
A Cathode Ray Tube (CRT) is a specialized vacuum tube containing an electron gun that emits a beam focused on a phosphor-coated screen to produce images.
It was widely used in traditional television sets and computer monitors.
Asked in SSC CGL 2023 (27 Jul, Shift 2)
Practice (1)
Q117Identify the sealed glass vacuum tube containing an electron beam that is focused on a phosphor-coated glass screen when light is emitted.
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Correct answer: A — Cathode ray tube
Answer: (A)The sealed glass vacuum tube that contains an electron beam focused on a phosphor-coated glass screen, where light is emitted, is known as a cathode ray tube.
Cathode Ray Tube (CRT)
Structure: A CRT consists of a large, sealed glass tube from which most of the air has been removed to create a vacuum. Inside this vacuum tube are one or more electron guns (cathodes) that emit electron beams when heated.
Functioning: The electron beams are accelerated and focused by electric and magnetic fields towards the phosphor-coated screen at the end of the tube.
Phosphor Coating: When the high-energy electrons strike the phosphor coating, they cause the phosphor material to emit visible light. This phenomenon is known as phosphorescence.
Image Formation: Varying the electrical signals sent to the electrodes of the CRT controls the direction and intensity of the electron beams, thereby creating images on the screen.
Key Components
Electron Gun: Emits and accelerates the electrons.
Deflection System: Uses magnetic or electric fields to direct the electron beam to specific locations on the screen.
Phosphor Screen: Coated with phosphorescent materials that emit light when struck by electrons.
Applications
Television Screens: Before the advent of modern flat-panel displays, CRTs were commonly used in television sets.
Oscilloscopes: Used in scientific research and diagnostics to display electronic signals.
Computer Monitors: Early computer monitors used CRT technology for visual output.
Thus, the correct option is:
Option 1: Cathode ray tube
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118
Sir Tim Berners-Lee invented the World Wide Web in 1989 while working at CERN.
He also wrote the first web browser and server software.
Asked in SSC CGL 2017 (10 Aug, Shift 1)
Practice (1)
Q118Who is known for the invention of 'World Wide Web'?
Show answer
Correct answer: A — Sir Tim-Berners-Lee
Answer: (A)
Sir Tim Berners-Lee invented the World Wide Web (1989). -
119
Netscape Navigator was historically one of the earliest and most popular commercial web browsers.
It played a major role in the 1990s dot-com boom.
Asked in SSC CGL 2017 (11 Aug, Shift 1)
Practice (1)
Q119Netscape Navigator is a _____.
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Correct answer: C — web browser
Answer: (C)
Netscape Navigator was a web browser. -
120
FTP stands for File Transfer Protocol, used for transmitting files over a computer network.
It facilitates data movement between clients and servers.
Asked in SSC CGL 2017 (12 Aug, Shift 1)
Practice (1)
Q120In computer terminology, what is the full form of FTP?
Show answer
Correct answer: D — File Transfer Protocol
Answer: (D)
FTP = File Transfer Protocol.