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Objective Questions

Latest EMRS PGT Computer Science Exam Question (Objective Questions), MCQ in English

Subjects : Subject Knowledge (Computer Science)

Question Bank EMRS PGT Computer Science Tier 2 Exam - English
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Subject Knowledge (Computer Science)

Question 1Single Answer
Which of the following represents the smallest unit of data in a computer?
  1. A
    Bit
  2. B
    Byte
  3. C
    Nibble
  4. D
    Word
Question 2Single Answer
Which device is used to convert digital signals into analog for transmission?
  1. A
    Repeater
  2. B
    Router
  3. C
    Switch
  4. D
    Modem
Question 3Single Answer
Which of the following is an example of an input device?
  1. A
    Keyboard
  2. B
    Printer
  3. C
    Monitor
  4. D
    Plotter
Question 4Single Answer
Which of the following is not a primary storage device?
  1. A
    Hard disk
  2. B
    RAM
  3. C
    Cache
  4. D
    ROM
Question 5Single Answer
The unit of storage representing 1024 bytes is called?
  1. A
    Kilobyte
  2. B
    Megabyte
  3. C
    Gigabyte
  4. D
    Terabyte
Question 6Single Answer
Which of the following stores frequently accessed data to speed up processing?
  1. A
    Cache memory
  2. B
    ROM
  3. C
    Hard disk
  4. D
    Flash memory
Question 7Single Answer
What does CPU stand for?
  1. A
    Central Processing Unit
  2. B
    Central Process Unit
  3. C
    Central Processor Utility
  4. D
    Central Programming Unit
Question 8Single Answer
Which of the following performs arithmetic and logical operations in a CPU?
  1. A
    ALU
  2. B
    Control Unit
  3. C
    Register
  4. D
    Decoder
Question 9Single Answer
Which memory is non-volatile and used to store firmware?
  1. A
    ROM
  2. B
    RAM
  3. C
    Cache
  4. D
    Register
Question 10Single Answer
Secondary storage is also called?
  1. A
    Temporary memory
  2. B
    Volatile memory
  3. C
    Permanent memory
  4. D
    Main memory
Question 11Single Answer
Which of the following is a system software?
  1. A
    Word Processor
  2. B
    Spreadsheet
  3. C
    Compiler
  4. D
    Web Browser
Question 12Single Answer
Which software acts as an interface between hardware and user?
  1. A
    Application software
  2. B
    Utility program
  3. C
    Operating system
  4. D
    Device driver
Question 13Single Answer
Which software converts source code into object code in one go?
  1. A
    Compiler
  2. B
    Interpreter
  3. C
    Assembler
  4. D
    Loader
Question 14Single Answer
Which of the following is an example of application software?
  1. A
    UNIX
  2. B
    BIOS
  3. C
    Device Driver
  4. D
    MS Word
Question 15Single Answer
What is the function of an operating system?
  1. A
    Manage hardware
  2. B
    Manage software
  3. C
    Provide user interface
  4. D
    All of the above
Question 16Single Answer
Which OS interface uses typed commands?
  1. A
    GUI
  2. B
    Menu-driven
  3. C
    CLI
  4. D
    Voice interface
Question 17Single Answer
The AND gate output is 1 when?
  1. A
    Any input is 1
  2. B
    All inputs are 1
  3. C
    All inputs are 0
  4. D
    Any input is 0
Question 18Single Answer
The OR gate output is 1 when?
  1. A
    All inputs are 1
  2. B
    Any input is 1
  3. C
    All inputs are 0
  4. D
    Any input is 0
Question 19Single Answer
The NOT gate is also called?
  1. A
    Inverter
  2. B
    Buffer
  3. C
    Amplifier
  4. D
    Decoder
Question 20Single Answer
Which logic gate produces output 1 only when all inputs are 0?
  1. A
    NOR
  2. B
    NAND
  3. C
    XOR
  4. D
    AND
Question 21Single Answer
What is the output of NAND gate when both inputs are 1?
  1. A
    1
  2. B
    Undefined
  3. C
    0
  4. D
    High impedance
Question 22Single Answer
De Morgan’s first law is?
  1. A
    (A + B)’ = A’B’
  2. B
    (AB)’ = A’ + B’
  3. C
    (A + B)’ = A’ + B’
  4. D
    (AB)’ = A’B’
Question 23Single Answer
The XOR gate output is 1 when?
  1. A
    Inputs are equal
  2. B
    Both inputs are 0
  3. C
    Both inputs are 1
  4. D
    Inputs are different
Question 24Single Answer
Decimal number 10 in binary is?
  1. A
    1000
  2. B
    1100
  3. C
    1010
  4. D
    1110
Question 25Single Answer
Binary number 1011 equals decimal?
  1. A
    11
  2. B
    10
  3. C
    12
  4. D
    13
Question 26Single Answer
Octal number system has base?
  1. A
    8
  2. B
    10
  3. C
    2
  4. D
    16
Question 27Single Answer
Hexadecimal number system has base?
  1. A
    8
  2. B
    10
  3. C
    16
  4. D
    12
Question 28Single Answer
The binary number 1111 equals hexadecimal?
  1. A
    A
  2. B
    E
  3. C
    F
  4. D
    D
Question 29Single Answer
Which code uses 7 bits for each character?
  1. A
    Unicode
  2. B
    ISCII
  3. C
    EBCDIC
  4. D
    ASCII
Question 30Single Answer
Unicode UTF-8 can represent characters using how many bits?
  1. A
    7
  2. B
    32
  3. C
    8
  4. D
    8–32
Question 31Single Answer
ISCII encoding is mainly used for?
  1. A
    English characters
  2. B
    Chinese scripts
  3. C
    Indian scripts
  4. D
    ASCII extension
Question 32Single Answer
In a computer, instructions are stored in?
  1. A
    CPU
  2. B
    Memory
  3. C
    ALU
  4. D
    I/O device
Question 33Single Answer
Which component controls the sequence of operations?
  1. A
    ALU
  2. B
    Register
  3. C
    CU
  4. D
    Memory
Question 34Single Answer
One nibble equals?
  1. A
    4 bits
  2. B
    2 bits
  3. C
    8 bits
  4. D
    16 bits
Question 35Single Answer
Which of the following is a volatile memory?
  1. A
    RAM
  2. B
    ROM
  3. C
    Flash memory
  4. D
    Magnetic disk
Question 36Single Answer
The binary equivalent of decimal 15 is?
  1. A
    1110
  2. B
    1111
  3. C
    1101
  4. D
    1010
Question 37Single Answer
Decimal 255 equals hexadecimal?
  1. A
    EE
  2. B
    AF
  3. C
    FF
  4. D
    DD
Question 38Single Answer
A byte consists of?
  1. A
    2 bits
  2. B
    4 bits
  3. C
    8 bits
  4. D
    16 bits
Question 39Single Answer
Which device displays visual output?
  1. A
    Keyboard
  2. B
    Mouse
  3. C
    Monitor
  4. D
    Scanner
Question 40Single Answer
Which device prints hard copy output?
  1. A
    Microphone
  2. B
    Keyboard
  3. C
    Scanner
  4. D
    Printer
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