Important Computer MCQs for FPSC, PCS, NTS, OTS & All Competitive Exams

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Important Computer MCQs for FPSC Competitive exams

Question: What is a computer?
Answer: A computer is an electronic device. It obeys our instructions. We can store data into it and can get stored data from it when we need.

Question: What is ABACUS?
Answer: ABACUS is the name of first calculating device, which was introduced by Chinese about 3000 B.C. This device is made of wooden box with rods inside.

Question: Who is the Father of the Computer?
Answer: Charles Babbage is the father of the computer.

Question: Which was the first digital computer?
Answer: The first digital computer was MARK-I.

Question: Write the second name of the Main frame Computer?
Answer: Macro computer is the second name of the mainframe computer.

Question: Write any example of Digital computer.
Answer: Digital watch, computer, and computer equipments are the examples of digital computer.

Question: Write any example of Analog computer.
Answer: Thermometer, Wight machine and speed meter are the examples of analog computer.

Question: What is Hardware?
Answer: Physical components of a computer are called Hardware.

Question: Write any three hardware components of a computer.
Answer: 1. Keyboard 2. Motherboard 3. Monitor

Question: What is meant by input?
Answer: Word input meAnswer to enter something into any thing.

Question: Write names of any three input devices of the computer?
Answer: 1. Keyboard 2. Joystick 3. Mouse

Question: Write names of any three output device.
Answer: 1. Monitor 2. Printer 3. Plotter

Question: What is CPU?
Answer: CPU stands for Central processing Unit and this portion of computer is called brain of the computer.

Question: What is ALU?
Answer: ALU stands for Arithmetic and Logical Unit. This unit of the CPU is capable of performing arithmetic and logical operations.

Question: What is Memory Unit?
Answer: In the memory unit of the computer data can be stored to use again and again and it is physical unit of the computer.

Question: Which is the volatile memory of the computer?
Answer: RAM is the volatile memory of the computer.

Question: Which is the non-volatile memory of the computer?
Answer: ROM is the non-volatile memory of the computer because we cannot change its contents.

Question: What are the peripheral devices of the computer?
Answer: The devices, which are connected to a computer, are called peripheral devices like keyboard, monitor and mouse.

Question: What is an algorithm?
Answer: A computer cannot solve any problem itself. “An algorithm is a set of instructions that are used to solve a problem.

Question: Write down the steps to solve a problem.
Answer: There are six steps to solve a problem.
1. Define the problem
2. Algorithm
3. Flow charting
4. Coding
5. Testing and debugging
6. Documentation

Question: What is meant by debugging?
Answer: Debugging is the process of removing errors from a program.

Question: What is a bug?
Answer: In terms of computer an error of a program is called a bug.

Question: What is documentation?
Answer: Documentation is the explanation of a program. It describes how a program works.

Question: Write names of backing storage devices.
Answer: Floppy disk, Hard disk, Magnetic Tape Disk, Compact Disk (CD).

Question: Write the name of primary storage of the computer.
Answer: RAM and ROM are called primary storage of the computer.

Question: Write names of the secondary devices of the computer.
Answer: Hard disk, floppy disk and compact disks are secondary storage devices of the computer.

Question: What is the second name of secondary storage devices?
Answer: Secondary storage devices are also called backing storage devices.

Question: What is the measurement unit of the computer memory?
Answer: Byte is the measurement unit of the computer memory.

Question: How much data can be stored in a floppy disk?
Answer: We can store maximum 1.44 MB data in a floppy disk.

Question: In how many sizes a floppy disk is available?
Answer: A floppy disk is available in two sizes that is 4.5 and 5.25 inches.

Question: What is a byte?
Answer: A byte is the measurement unit of the computer memory and it consists of 8 bits.

Question: What is a bit?
Answer: A bit is the smallest unit of the computer memory.

Question: Which command is used to check errors from a disk?
Answer: CHKDSK command is used to check errors of a disk.

Question: How will you make a disk useable?
Answer: To make a disk useable, it is formatted by using FORMAT command of DOS.

Question: BASIC stands for.
Answer: Beginners All purpose Symbolic Instruction Code.

Question: What is data?
Answer: Collection of facts and figures is called data.

Question: What is information?
Answer: Processed form of data or organized form of data is called information.

Question: Who invented BASIC language?
Answer: Dr. John, G. Kemney and Dr. Thomas E. Kurtz.

Question: What is the purpose of REM command in BASIC language?
Answer: This command is used to make a statement non-executable and is helpful for documentation of a program.

Question: What is maximum length of a variable in BASIC language?
Answer: The maximum length of a variable in BASIC is 40 characters.

Question: What is a variable?
Answer: The quantity which does not remain fix.

Question: What is a constant?
Answer: The quantity, which remains fix and cannot be changed, is called constant.

Question: How many types of a variable in BASIC language?
Answer: There are two types of variables in BASIC language.

Question: Write the names of variable types.
Answer: 1. Numeric variable 2. String variable

Question: How will you make a variable string?
Answer: To make a variable string variable place $ sign after the name of the variable.

Question: What is the maximum length of a string variable?
Answer: 255 characters.

Question: What is the base of hex-decimal numbers?
Answer: 16

Question: What is the purpose of TRON in basic language?
Answer: TRON displays line number during execution of the program.

Question: What is a loop?
Answer: Repetition of program statements is called a loop.

Question: Write names of some famous high-level languages.
Answer: Some common high-level languages are:
1. FORTRAN
2. PASCAL, PEARL
3. BASIC , PH.P
4. JAVA
5. C++

Question: How many parts of computer?
Answer: There four parts of computer:
1. Monitor / LCD / LED
2. Keyboard
3. C.P.U
4. Mouse

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