Computer questions and answers with pdf in hindi and english

Computer Questions and Answers with Pdf

Computer questions and answers are often asked in competitive exams. In SSC (CGL, CHSL, MTS, CPO, Steno..), Bank (Clerk, RRB PO), Railway (NTPC, Group D, ALP), UPSC (IAS, IPS, CDS), Delhi Police, Constable, and other state exams Computer questions are definitely asked in these exams.

Here I Shared Some basic Computer Questions and Answers with Pdf. Download 150 + Computer Questions with Computer Book In Hindi Medium. Link Given Below

What is a Computer?

The computer is an automatic and electronic device that works according to instructions who accept data and processes, stores, or displays the data for any result, according to the software or program.

Full Form of Computer

C – Commonly
O – Operated
M – Machine
P – Particularly
U – Used for
T – Technical
E – Education and
R – Research

History of Computer

The word computer has its origin from the Latin word computer.
But some experts believe that the word computer originated from the word compute. Generally, both mean calculation.

  • Abacus was the first counting device that was developed in China by Lee kai chain in1600 century. It consists of a rectangular wooden frame and beads. The wooden frame contains horizontal rods and the beads which are passed through the rods. The beads of counters represent digits. The device is used to perform simple addition and subtraction Also used to extract the square root.
  • Napier’s Bones
  • Pascaline
  • Punched Card System
  • Charles Babbage’s Calculating Engines (1792-1871)
  • Tabulating Machine (Hollerith) (1880)
  • Mark I Computer (1930)
  • First Un- Programmable Electronic Digital Computer (ABC)
  • Electronic Numerical Integrator and Calculator – ENIAC (1946)
  • Electronic Discrete Variable Automatic Computer – EDVAC (1950)
  • Electronic Delay Storage Automatic Calculator – EDSAC (1949)
  • Universal Automatic Computer – UNIVAC (1951)
  • Micro Processor – INTEL 4004 Read Detail Wise In Pdf
Computer Generations
  • First Generation Computer – (1940 – 1956) (vaccum)
  • Second Generation Computer – (1956 – 1963) (Transistor)
  • Third Generation Computer – (1964 – 1971) ( Integrated circuits)
  • Fourth Generation Computer – (1971 – 1980) (Very Large scale integrated circuits)
  • Fifth Generation Computer – (1980 – Present ) (Very large scale integrated chips)

Parts of Computer

  1. CPU (Central Processing Unit)
  2. ALU (Arithmetic & Logical Unit)
  3. MEMORY UNIT (Primary memory and Secondary memory)
    Primary memory – RAM (Read Access Memory) and ROM (Read Only Memory)
    Secondary Memory – Hard Disk, Pen Drive, Memory Card

Classification of Computer

Computers can be classified on the basis of their Size, functioning, objectives.

On The Basis of Size

  1. Micro Computer
  2. Mini Computer
  3. Mainframe Computer
  4. Super Computer
  5. Personal Computer

On The Basis of Purpose

  1. General Purpose Computer
  2. Special Purpose Computer

On The Basis of Applications

  1. Analog Computer
  2. Digital Computer
  3. Hybrid Computer

Input Devices of Computer

  1. Keyboard
    *Toggle keys
    Caps Lock
    Number Lock
    Scroll Lock
    *Modifier keys
    Shift
    Function
    Control
    ALT
    *Function keys
    *Escape key
  2. Mouse
  3. Joy Stick
  4. Track Ball
  5. Scanner
  6. Light Pen
  7. Microphone
  8. Digitizer
  9. Bar code Reader
  10. Optical Mark Recognition (OMR)
  11. Optical Character Recognition (OCR)
  12. Touch Screen
  13. Magnetic Ink Character Recognition (MICR)
  14. Web Camera

Output Devices of Computer

  1. Monitors
    – Cathode – Ray Tube (CRT)
    – Flat Panel Display
    – Liquid Crystal Display (LCD)
    – Light Emitting Diode (LED Monitor)
    – Organic Light-Emitting Diode (OLED)
  2. Printers
    *Impact Printers
    – dot Matrix Printer
    – line Printers
    *Non-Impact Printer
    – laser Printer
    – inkjet Printer
    *Other Types
    – solid Ink Printer
    – led Printer
  3. Plotters
    – drum Plotter
    – flatbed Plotter
  4. Speaker, Home Theater
  5. Digital Projects

Uses of Computer

In the Modern era Computers are used in many fields like :

  1. EDUCATION
  2. BANK
  3. INDUSTRY
  4. SCIENCE AND TECHNOLOGY
  5. COMMERCE
  6. SECURITY
  7. ADMINISTRATION
  8. RECREATION
  9. AIRLINES AND RAILWAY BOOKING
  10. MEDICINE
  11. COMMUNICATION
  12. BILLING
  13. ADVERTISEMENT ETC.
Shortcut keys in computer

Ctrl + A – Select All
Ctrl + B – Bold
Ctrl + C – Copy
Ctrl + V – Paste
Ctrl + N – New Blank Document
Ctrl + X – Cut
Ctrl + I – Italic
Ctrl + U – Underline
Ctrl + Z – Undo
Ctrl + Y – Redo
Ctrl + O – Open
Ctrl + S – Save
Ctrl + K – Insert Hyperlink
Ctrl + L – Left Alingment
Ctrl + E – Centre Alingment
Ctrl + R – Right Alingment
Ctrl + J – Justify The Alingment
Ctrl + F – To Open Find Box

Ctrl + G – Find and Replace
Ctrl + W – Close Document
Ctrl + M – Indent
Ctrl + P – Print
Ctrl + Shift + > – Increase Font Size
Ctrl + Shift + < – Decrease Font Size
Alt + H – Home Tab
Alt + N – Insert Tab
Alt + G – Design Tab
Alt + F – File Page
Alt + M – Mailings Tab
Alt + P – Layout Tab
Alt + Q – Tell Me Box
Alt + R – Review Box
Alt + W – View Tab
Alt + S – Reference Tab
Alt + F5 – Restore The Program Window
Alt + F7 – Find The Next Misspelling
Alt + F10 – Maximize The Program Window
Alt + F4 – Exit
Shift + F7 – Thesaurus
F1 – Help
F5 – Refresh the Page
F4 – Repeat the Action
F7 – Spell Check
F6 – Go to The Next Pane
F8- Extent the Selection
F9 – Update the Selected Fields
F10 – Show Key Tips
F11- Go to The Next Fields
F12 – Save as
Shift + F3 – Change the case of letters
Shift + F4 – Repeat a Find
Shift + F10 – Maximize the Document Window
Shift + F12 – Choose the Open Button
TAB – To Move To The Previous Object
For ScreenShot on Window – Window key + PrtSc

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