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  • Science Environment And Technology – Yearwise Questions – Computer Science – W.B.C.S. Mains Examination.

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    WBCS Main Question Paper – 2019

    1. Indira Gandhi Centre for Atomic Research is located in
      (A) Kolkata
      (B) Kalpakkam
      (C) Mumbai
      (D) Hyderabad
    2. What does ‘CSIR’ stand for?
      (A) Council of Scientific and Industrial Research
      (B) Center for Science and Industrial Research
      (C) Center for Share and Investment Ratio
      (D) Council for Scientific and Informational Research
    3. Where is Vikram Sarabhai Space Centre?
      (A) Bengaluru
      (B) Sriharikota
      (C) Baleswar
      (D) Thiruvananthapuram
    4. The device used by Banks to automatically read those special numbers
      on the bottom of the cheques is
      (A) MICR
      (B) OMR
      (C) UPC
      (D) UDIC
    5. WAN hardware includes
      (A) Multiplexors and routers
      (B) EDF
      (C) Bridger and modems
      (D) Removable disc
    6. What is the wavelength of Super High Frequency (SHF) especially used
      in radar and satellite communication?
      (A) 1 m – 10 m
      (B) 1 cm – 10 cm
      (C) 10 cm – 1 m
      (D) 0.1 cm – 1 cm

    7.Which one is the first search engine in Internet?
    (A) Google
    (B) Archie
    (C) Altavista
    (D) WAIS

    1. Which one programming language is used for artificial intelligence?
      (A) C
      (B) Java
      (C) J2EE
      (D) Prolog
    2. A dual layer Blue-ray disc can store data upto
      (A) 20 GB
      (B) 30 GB
      (C) 40 GB
      (D) 50 GB
    3. Data transmitted or a given amount of time is called
      (A) Noise
      (B) Power
      (C) Frequency
      (D) Bandwidth
    4. In TV transmission, picture signal is modulated.
      (A) DSB-SC
      (B) VSB
      (C) SSB-SC
      (D) Pulse
    5. India’s navigational satellite system is known as
      (A) GPS
      (B) GLONASS
      (C) BeiDou
      (D) IRNSS
    6. The golden rice contains
      (A) Vitamin A
      (B) Vitamin C
      (C) Vitamin E
      (D) Vitamin D
    7. The Btcotton is a transgenic crop with gene transfer from
      (A) virus
      (B) bacteria
      (C) fungi
      (D) algae

    WBCS Main Question Paper – 2018

    1. Which is the first space ship to orbit the moon?
      a) Luna 10(1966, USSR)
      b) Zond-5
      c) Lunakhod-1
      d) Soyuz-28
    2. Which is the India’s first nuclear powered Submarine?
      a) INS Kalvari
      b) INS Sindhuraj
      c) INS Chakra
      d) INS Arihant
    3. IC in computer stands for
      a) Internal Circuits
      b) Integrated Circuits
      c) Integrated Current
      d) Integrated Charge
    4. What is the full form of “VIRUS” ?
      (A) Various Information Resources Under Stage
      (B) vital Information Resources Under Siege
      (C) Various Information Resource Unlimited Storage
      (D) Vital Images Reviews Universal Studios
    5. What is the full form of “RADAR” ?
      (A) Radio Device and Ranging
      (B) Region Device and Ranging
      (C) Radio Detecting and Ranging
      (D) Radio Detect and Ranges
    6. What is the full form of “ISRO”?
      a) Indian Satellite Research Organisation
      b) Indian Solar Research Organisation
      c) Indian Site Research Organisation
      d) Indian Space Research Organisation

    WBCS Main Question Paper – 2017

    1. What, among the following, is India’s first Anit-submarine warfare
      corvette ?
      (A) INS Kamorta
      (B) Naval version of Light Combat Aircraft (LCA)
      (C) INS Shivalik
      (D) INS Shakti
    2. When was PSLV-C 15 launched successfully ?

    (A) January 30,2011

    (B) June 5,2011
    (C) July 12,2010
    (D) May 10, 2010

    1. A geostationary satellite has an orbital period of
      (A) 2 hours
      (B) 6 hours
      (C) 12 hours
      (D) 24 hours
    2. When was India’s first scientific expedition to the South Pole launched ?
      (A) February, 2010
      (B) May, 2016
      (C) July, 2010
      (D) June, 2014
    3. An atomic power station is located in
      (A) Hyderabad
      (B) Bengaluru
      (C) Kalpakkam
      (D) Trivandrum
    4. What is software ?
      (A) A type of computer code
      (B) A computer language
      (C) A set of instructions for your computer
      (D) A cover for the computer
    5. The operating system is the most common type of ______ software.
      (A) System
      (B) Communication
      (C) Application
      (D) None of the above
    6. A computer cannot boot if it does not have the
      (A) compiler
      (B) loader
      (C) operating system
      (D) assembler
    7. PARAM was developed by
      (A) IIT Kanpur
      (B) C-DAC
      (C) IIT Kharagpur
      (D) None of the above
    8. Pasteurization of milk in Dairy farm is conducted by
      (Microwave volumetric heating)
      (A) Ozone
      (B) UV rays
      (C) Chlorine
      (D) Microwave
    9. For television broadcasting, the frequency range employed normally
      varies from
      (A) 30 – 300 MHz
      (B) 30 – 300 GHz
      (C) 30 – 300 kHz
      (D) 30 – 300 Hz
    10. Modern communication systems are based on
      (A) Analog circuits
      (B) Digital circuits
      (C) Combination of Ȧ analog and digital circuits
      (D) None of the above
    11. A transistor is made of
      (A) doped semiconductors
      (B) intrinsic semiconductors
      (C) a metal piece sandwiched between two intrinsic semiconductors
      (D) None of the above
    12. A carbon microphone is best used in
      (A) Dynamo
      (B) Telephone
      (C) Transformer
      (D) None of the above
    13. The technique used to transmit audio signal in television broadcasting
      is
      (A) amplitude modulation
      (B) frequency modulation
      (C) pulse code modulation
      (D) time division multiplexing

    WBCS Main Question Paper – 2016

    1. Which one of the following is the web search engine ?
      (A) Aliweb
      (B) Jughead
      (C) Baidu
      (D) All of these
    2. Which one of the following persons invented the world’s first digital and
      programmable robot ?
      (A) George Devel
      (B) Hisashige Tanaka
      (C) Korel Capek
      (D) Joseph Engel Berger
    3. Spam is related to –
      (A) Computer
      (B) Art
      (C) Music
      (D) Game
    4. Which one of the following internet protocol version is the most deployed
      internet layer protocal ?
      (A) IPV2
      (B) IPV4
      (C) IPV6
      (D) IPV8
    5. Junk e-mail is also called –
      (A) Spoof
      (B) Spool
      (C) Sniffer Script
      (D) Spam
    6. Which one of the following is a set of program instruction that can attach
      itself to a file, reproduces itself and spread to other file ?
      (A) Computer worm
      (B) Computer virus
      (C) Trojan horse
      (D) Phising Scam
    7. Which one of the following is the most common picking device of the
      graphic application ?
      (A) Graphic tablet
      (B) Joystick
      (C) Mouse
      (D) Light Pen
    8. The frequency band used for radar relay system and television is –
      (A) VLF
      (B) UHF
      (C) VHF
      (D) EHF
    9. Which of the following satellites is used in ship to shore, shore to shore
      and shore to ship communication ?
      (A) Marisat (USA, 1973)
      (B) Comsat
      (C) Telestar
      (D) Intelsat
    10. Which of the following is the first state in India to have 3G services of
      Telecommunication ?
      (A) Maharashtra
      (B) Bihar
      (C) Uttar Pradesh
      (D) Andhra Pradesh
    11. WIMAX is related to which one of the following ?
      (A) Biotechnology
      (B) Space Technology
      (C) Missile Technology
      (D) Communication Technology

    12.Which of the following is not the term of Information Technology ?
    (A) Cyber Space
    (B) Upload
    (C) Modem
    (D) Light Storage

    1. Which of the following countries firstly deployed 4G system of mobile
      telecommunication in world ?
      (A) South Korea
      (B) Japan
      (C) United States
      (D) England
    2. Which one of the following computer operating system (OS) is the most
      commonly used in the Top- 500 super computers of the world ?
      (A) Unix OS
      (B) Linux OS
      (C) Lisa OS
      (D) Mac OS
    3. Which one of the following application is commonly used to prepare a
      presentation or slide show ?

    (A) Photoshop
    (B) PowerPoint
    (C) Internet explorer
    (D) Outlook express

    1. What is the function of the Microsoft office word ?
      (A) An operating system
      (B) A downloading application software
      (C) A word processing software
      (D) An input device
    2. Which one of the following discs is used to cold boot a computer ?
      (A) Set up disc
      (B) Program disc
      (C) Diagnostic disc
      (D) System disc
    3. Long distance short wave radio broadcasting uses –
      (A) Direct wave
      (B) Sky wave
      (C) Ionospheric wave
      (D) Ground wave
    4. Which one of the following devices has installed Wi-Fi devices in its
      system ?
      (A) Smartphone
      (B) Video Game consoles
      (C) Computer Printers
      (D) All of these
    5. Which of the following Television display is working on the principle of
      semiconductor ?
      (A) Plasma display
      (B) Liquid Crystal display
      (C) Light emitting diode display (LED)
      (D) None of these
    6. Who had coined the term television at the first International Electricity
      congress held in Paris ?
      (A) Paul Nipkow
      (B) Constantin Perskyi
      (C) J J Thompson
      (D) Henry Patrick
    7. LEC or Light Emitting Electrochemical Cell is a different mode of
      operation of —
      (A) LEDS
      (B) CRTS
      (C) LCDS
      (D) OLEDS
    8. From which of the following GSM technologies, the LTE (Long Term
      Evolution) is made to the enhancement of telecommunication ?

    (A) Wi Man
    (B) CDMA
    (C) UMTS
    (D) HSDPA

    1. Which one of the following sold the world’s first mobile television MTV-1?
      (A) Clive Sinclair
      (B) George Shapiro
      (C) Clive Clinton
      (D) William Gladstone
    2. Which of the following electromagnetic waves is used by the Bluetooth
      to exchange data over short distances ?
      (A) Microwaves
      (B) Radio Waves
      (C) X-rays
      (D) UV-rays
    3. Which of the following companies launched the 3G mobile
      telecommunication for the first time in the world ?
      (A) Nextle in the United States
      (B) NTT DoCoMo (Japan)(1998)
      (C) Telus Mobility (Canada)
      (D) Bharati Airtel in India
    4. Which of the following is the web browser ?
      (A) Google Chrome
      (B) Safari
      (C) Opera
      (D) All of these
    5. Intelsat satellite is used for –
      (operated from 1964 to 2001)
      (A) radar communication
      (B) radio communication
      (C) Intercontinental communication
      (D) None of the above
    6. Modem is a device used for –
      (A) converting analog signals to digital signals
      (B) modulating signals
      (C) Either of the above
      (D) None of the above
    7. Which one of the following computers is the world’s first commercial
      computer ?
      (A) Feffanti Mark-1
      (B) Mark-1 star
      (C) UNIVAC-1 (USA in 1951)
      (D) IBM-704
    8. What frequency range of EM waves are used for commercial FM radio
      ?
      (A) 88 MHz to 108 MHz
      (B) 88 GHz to 108 GHz
      (C) 88 kHz to 108 kHz
      (D) None of these
    9. Which one of the following displays is not the volatile television display ?
      (A) Plasma
      (B) Liquid Crystal Display
      (C) Organic light Emitting Diode
      (D) Cholesteric Display
    10. Which one of the following languages is not the scripting language ?
      (A) Java scripts
      (B) Pytheon
      (C) Perl
      (D) Lisp

    34, Who is referred to as the ‘Father of SMS’ ?
    (A) Jamie Lannister
    (B) Ross Bolton
    (C) Matti Makkonen
    (D) None of them

    1. Who has created the high level programming language for the first
      time for computers ?
      (A) Konord Lorenz
      (B) Konard Zuse (1943-45)
      (C) Mario Johnson
      (D) Henry Gladstone
    2. Which one of the following computer scientists firstly used the term
      ‘bits‘ ?
      (A) George Jonhansen
      (B) Cliff Berry
      (C) John Atanassoff
      (D) Claude E Shannon
    3. Which one of the following memories is not non-volatile computer
      memory ?
      (A) PRAM
      (B) SRAM
      (C) Flash Memory
      (D) Bubble Memory

    WBCS Main Question Paper – 2015

    1. Which of the following laser types is used in a laser printer
      (A) Dye laser
      (B) Gas laser
      (C) Semiconductor laser
      (D) Excimer laser
    2. A term associated with comparison of processing speed
      (A) MPG
      (B) CPS
      (C) MIPS
      (D) None of the above
    3. India’s ‘Silicon Valley’ is located in
      (A) Kerala
      (B) Rajasthan
      (C) Karnataka
      (D) Tamilnadu
    4. ‘LASER Printer’ are an example of_____________
      (A) Line printers
      (B) Dot- Matrix printer
      (C) Page Printer
      (D) None of the above
    5. Encoder is a
      (A) Integrated circuit
      (B) Digital circuit
      (C) VLSI
      (D) IC chips
    6. What is the Galileo Project?
      (A) An inter-country Program of missile shield developed by the U.S.A
      (B) A project developed by India with assistance from Canada
      (C) An environmental protection project being developed by Japan
      (D) A multi satellite navigation project developed by the European
      union
    7. NASA’s Deep Impact Space Mission was employed to take detailed
      pictures of which comet nucleus?
      (A) Halley’s comet
      (B) Hale Bopp
      (C) Hyakutake
      (D) Tempel-1(2005)
    8. Which one of the following is a space craft?
      (A) Apohis
      (B) Cassini
      (C) Spitzer
      (D) Tech sar
    9. An artificial satellite orbiting around the earth does not fall down because
      the attraction of earth
      (A) does not exist in such distance
      (B) Is neutralised by the attraction of the moon
      (C) Provides the necessary speed for its steady motion
      (D) Provides the necessary acceleration for its motion
    10. ‘Eugenics’ is the of _______
      (A) People of European origin
      (B) Genetics of Plants
      (C) Different races of mankind
      (D) Altering human beings by changing their genetic components.

    WBCS Main Question Paper – 2014

    1. The technique of MRI uses the phenomenon of
      (Magnetic resonance imaging)
      (A) Nuclear Magnetic Resonance
      (B) Electron Cyclotron Resonance
      (C) Optical Resonance
      (D) Microwave Resonance
    2. In Bt Cotton, Bt stands for
      (A) Bacillus thermoglucosidasius
      (B) Bacillus thuringiensis
      (C) Bacterium tenericutes
      (D) Terminator Bacteria
    3. In computers, the storage medium which cannot usually be modified is known as
      (A) ROM
      (B) RAM
      (C) Hard disk
      (D) Flash drive
    4. The acronym CCD stands for
      (A) charge coupled device
      (B) control circuit device
      (C) credit card device
      (D) configuration control device
    5. The gas that India’s Mars Mission is looking for as evidence of life is
      (A) oxygen
      (B) methane
      (C) carbon dioxide
      (D) sulphur dioxide
    6. Microwave ovens heat water in food because
      (A) water is a polar molecule
      (B) the heat capacity of water is high
      (C) water flows easily
      (D) water molecule is small
    7. The mode in which a digital adder involving logic gates add data is
      (A) binary
      (B) octal
      (C) decimal
      (D) hexadecimal
    8. The abbreviation ‘http’ stands for
      (A) HTML Transfer Technology Process
      (B) Hyperspase Terms and Tech Protocol
      (C) Hyperspace Techniques Tech Progress
      (D) Hyper Text Transfer Protocol
    9. The following is not a programming language
      (A) C++
      (B) JAVA
      (C) Office Suite
      (D) Fortran
    10. MRI stands for
      (A) Magnetic Resonance Imaging
      (B) Magnetic Reflection Imaging
      (C) Machine Readable Imaging
      (D) Mechanical Reading Instrument
    11. The number of bits in a byte is
      (A) 2
      (B) 4
      (C) 8
      (D) 16

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