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Objective Questions

Latest BTSC Laboratory Assistant Computer Science Exam Question (Objective Questions), MCQ in English

Subjects : Technical Subject (Computer Science & IT)

Question Bank BTSC Laboratory Assistant (Computer Science) Exam - English
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Technical Subject (Computer Science & IT)

Question 1Single Answer
Which component is known as the brain of a computer?
  1. A
    RAM
  2. B
    Hard Disk
  3. C
    CPU
  4. D
    Monitor
Question 2Single Answer
Which part of the CPU performs arithmetic and logical operations?
  1. A
    Control Unit
  2. B
    Cache
  3. C
    Register
  4. D
    ALU
Question 3Single Answer
What is the primary function of the Control Unit?
  1. A
    Store files permanently
  2. B
    Control and coordinate computer operations
  3. C
    Perform only multiplication
  4. D
    Display information
Question 4Single Answer
Which memory is volatile?
  1. A
    ROM
  2. B
    Flash memory
  3. C
    SSD
  4. D
    RAM
Question 5Single Answer
Which memory normally retains its contents when power is switched off?
  1. A
    RAM
  2. B
    Cache
  3. C
    ROM
  4. D
    Register
Question 6Single Answer
Which storage device generally has no mechanical moving parts?
  1. A
    HDD
  2. B
    Magnetic tape
  3. C
    SSD
  4. D
    Floppy disk
Question 7Single Answer
Which device is primarily used for entering textual information into a computer?
  1. A
    Monitor
  2. B
    Printer
  3. C
    Keyboard
  4. D
    Speaker
Question 8Single Answer
Which device converts digital output into a visible hard copy?
  1. A
    Scanner
  2. B
    Mouse
  3. C
    Printer
  4. D
    Microphone
Question 9Single Answer
Which device is both an input and output device?
  1. A
    Standard keyboard
  2. B
    Printer
  3. C
    Speaker
  4. D
    Touchscreen
Question 10Single Answer
What is the smallest unit of digital information?
  1. A
    Bit
  2. B
    Byte
  3. C
    Word
  4. D
    Nibble
Question 11Single Answer
How many bits are normally present in one byte?
  1. A
    4
  2. B
    8
  3. C
    16
  4. D
    32
Question 12Single Answer
A group of four bits is called?
  1. A
    Byte
  2. B
    Word
  3. C
    Block
  4. D
    Nibble
Question 13Single Answer
Which memory is located very close to the CPU and provides faster access than main memory?
  1. A
    Optical memory
  2. B
    Magnetic tape
  3. C
    Cache memory
  4. D
    Virtual disk
Question 14Single Answer
Which CPU storage location provides extremely fast temporary data storage?
  1. A
    Register
  2. B
    HDD
  3. C
    DVD
  4. D
    ROM
Question 15Single Answer
Which bus carries the location of data to be accessed?
  1. A
    Data bus
  2. B
    Address bus
  3. C
    Control bus
  4. D
    Expansion bus
Question 16Single Answer
Which bus carries actual data between computer components?
  1. A
    Data bus
  2. B
    Address bus
  3. C
    Control bus
  4. D
    Power bus
Question 17Single Answer
The process of starting a computer and loading the operating system is called?
  1. A
    Formatting
  2. B
    Compiling
  3. C
    Debugging
  4. D
    Booting
Question 18Single Answer
Which software acts as an interface between computer hardware and users/applications?
  1. A
    Presentation software
  2. B
    Spreadsheet
  3. C
    Compiler only
  4. D
    Operating system
Question 19Single Answer
Which is an example of system software?
  1. A
    Photograph
  2. B
    Word processor document
  3. C
    Operating system
  4. D
    Database record
Question 20Single Answer
Which component provides long-term secondary storage?
  1. A
    Register
  2. B
    Cache
  3. C
    CPU
  4. D
    SSD
Question 21Single Answer
The binary number system has which base?
  1. A
    16
  2. B
    8
  3. C
    10
  4. D
    2
Question 22Single Answer
The octal number system uses which base?
  1. A
    2
  2. B
    10
  3. C
    8
  4. D
    16
Question 23Single Answer
The hexadecimal number system has which base?
  1. A
    8
  2. B
    16
  3. C
    10
  4. D
    32
Question 24Single Answer
Which digits are valid in the binary number system?
  1. A
    1 to 9
  2. B
    0 to 7
  3. C
    0 to 9
  4. D
    0 and 1
Question 25Single Answer
Which symbol represents decimal 10 in hexadecimal notation?
  1. A
    F
  2. B
    B
  3. C
    C
  4. D
    A
Question 26Single Answer
Which hexadecimal digit represents decimal 15?
  1. A
    C
  2. B
    D
  3. C
    F
  4. D
    E
Question 27Single Answer
What is the decimal equivalent of binary 1010?
  1. A
    8
  2. B
    10
  3. C
    12
  4. D
    14
Question 28Single Answer
What is the binary equivalent of decimal 8?
  1. A
    1000
  2. B
    1010
  3. C
    1100
  4. D
    1110
Question 29Single Answer
What is the decimal equivalent of binary 1111?
  1. A
    12
  2. B
    15
  3. C
    14
  4. D
    13
Question 30Single Answer
What is the decimal equivalent of octal 10?
  1. A
    2
  2. B
    8
  3. C
    10
  4. D
    16
Question 31Single Answer
What is the decimal equivalent of hexadecimal 10?
  1. A
    8
  2. B
    10
  3. C
    20
  4. D
    16
Question 32Single Answer
One hexadecimal digit corresponds to how many binary bits?
  1. A
    4
  2. B
    3
  3. C
    2
  4. D
    8
Question 33Single Answer
One octal digit corresponds to how many binary bits?
  1. A
    2
  2. B
    4
  3. C
    3
  4. D
    8
Question 34Single Answer
What is the result of binary addition 1 + 1?
  1. A
    1
  2. B
    100
  3. C
    11
  4. D
    10
Question 35Single Answer
What is the binary result of 101 + 10?
  1. A
    101
  2. B
    110
  3. C
    1000
  4. D
    111
Question 36Single Answer
Which operating system processes groups of jobs with little or no direct user interaction?
  1. A
    Mobile OS
  2. B
    Real-time OS
  3. C
    Distributed OS
  4. D
    Batch OS
Question 37Single Answer
Which OS is designed to respond to events within strict timing constraints?
  1. A
    Batch OS
  2. B
    Multiprogramming OS
  3. C
    Real-time OS
  4. D
    Offline OS
Question 38Single Answer
Which operating system coordinates multiple networked computers so they may appear as a unified system?
  1. A
    Batch OS
  2. B
    Distributed OS
  3. C
    Single-user OS
  4. D
    Standalone OS
Question 39Single Answer
Multiprogramming primarily aims to improve?
  1. A
    Disk capacity
  2. B
    Screen resolution
  3. C
    CPU utilization
  4. D
    Keyboard speed
Question 40Single Answer
A program currently being executed is called?
  1. A
    File
  2. B
    Process
  3. C
    Folder
  4. D
    Driver
Question 41Single Answer
Which structure stores information about a process in an operating system?
  1. A
    URL
  2. B
    PCB
  3. C
    SQL
  4. D
    DNS
Question 42Single Answer
PCB stands for?
  1. A
    Process Control Block
  2. B
    Program Communication Buffer
  3. C
    Primary Control Bus
  4. D
    Process Cache Buffer
Question 43Single Answer
Which process state indicates that the process is waiting to be assigned a CPU?
  1. A
    Blocked
  2. B
    Running
  3. C
    Terminated
  4. D
    Ready
Question 44Single Answer
Which process state means instructions are currently being executed by the CPU?
  1. A
    New
  2. B
    Ready
  3. C
    Waiting
  4. D
    Running
Question 45Single Answer
Which scheduling algorithm serves processes in their arrival order?
  1. A
    SJF
  2. B
    FCFS
  3. C
    Round Robin
  4. D
    Priority scheduling
Question 46Single Answer
FCFS stands for?
  1. A
    First Command First Stored
  2. B
    First CPU First Scheduled
  3. C
    Fastest Computer First Served
  4. D
    First Come First Served
Question 47Single Answer
Which scheduling algorithm chooses the process having the shortest CPU burst?
  1. A
    SJF
  2. B
    FCFS
  3. C
    Round Robin
  4. D
    FIFO paging
Question 48Single Answer
SJF stands for?
  1. A
    Small Job Function
  2. B
    Shortest Job First
  3. C
    Scheduled Job First
  4. D
    System Job Framework
Question 49Single Answer
Which scheduling technique commonly uses a fixed time quantum?
  1. A
    FCFS
  2. B
    SJF
  3. C
    Round Robin
  4. D
    Non-preemptive priority
Question 50Single Answer
Round Robin scheduling is particularly suitable for?
  1. A
    Only batch systems
  2. B
    Time-sharing systems
  3. C
    Offline storage
  4. D
    ROM programming
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