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Computer System

Explore the components and functionality of computer systems, from hardware to software, and gain insights into their design and operation.












operating system





Which sentence below best defines encryption?

  • Encryption is the process of converting information or data into a code to prevent unauthorised access.
  • Encryption is the process of converting information or data into a code to prevent authorised access.
  • Encryption is the process of putting a password on a file to protect it.
  • Encryption is the process of slowing down data transfer.

What is an input device?

  • An input device is a device that converts the results from the processor into data we can see or hear.
  • An input device is a device that allows the user to save data to and to load data from.
  • An input device is part of the processor of a computer.
  • An input device is a device that allows the user to give the computer data.

A group of computers that are connected together in order to share resources quickly and efficiently.

  • What is a network?

It is an American micro-blogging and social networking service on which users post and interact with messages known as "tweets".

  • Twitter
  • Facebook
  • Instagram
  • Tumbler

From the following which is not secondary memory device

  • Tape Drive
  • Solid state driver
  • Touch screen
  • Memory Card

Robots can be used in automations

  • True
  • False

The ___________________ is the part of the computer system that decides where to send data to be processed.

  • Control Unit

A disc usually used to store music files.

  • CD ROM

The data is not saved.

  • Which statement best describes what happens to the temporary working memory (RAM) of a computer when it is shut down?

Tick the output devices

  • Mouse
  • Speakers
  • Screen
  • Printer

6. Which of the following is not a database program?

  • MS-Word

An internal card the enables high quality pictures on the monitor.

  • Video card

The main purpose of a computer is to process data. The processing stage takes place within the__________________.

  • Keyboard
  • RAM
  • CPU
  • Printer

What produces useful information out of data?

  • Computer
  • Processing
  • Programming
  • none of above

It is a computer output device that produces a permanent or hard copy of documents stored in the computer.

  • Monitor
  • Printer
  • Scanner


  • A file that is sent along with an email message is called a(n)...

9. Which of the following is generally used as a computer input device?

  • keyboard

Full form of GUI is

  • Graphical User Idea
  • Graphical User Interface
  • Graphics Uses Interface
  • Graphical Uses Idea

The largest number that can be represented by 4 bits is:

  • 12
  • 13
  • 15
  • 31

An operating system is a----------------

  • Application software
  • Web browser
  • Hardware
  • System software


  • The art of cracking into a computer to steal information is called?

How many bits are in a byte? (type one number only)

  • 8

It is a free, online photo-sharing application and social network platform that was acquired by Facebook in 2012.

  • Twitter
  • Facebook
  • Instagram
  • Tumbler

Which of the following is true of RAM?

  • All data/instructions are lost when the power is turned off
  • Data/instructions are permanent
  • It is connected externally to the computer system
  • Contains the bootstrap

3. The keyboard layout designed by Sholes is :


Web browser, e-mail

  • Network application examples

Uses your internet to upload and save your data to an online space.

  • Cloud Storage

The internal fan that cools the microprocessor.

  • CPU fan

The CPU (central Processing Unit):

  • a) sends data to be processed
  • b) performs arithmetic and logic functions
  • c) processes raw data into information
  • d) does all of the above

AI and ML stands for

  • Art information and Man Language
  • Artificial intelligence andMajor Language
  • Artificial intelligence andmail
  • Artificial Intelligence and Machine Learning

It serves as a gateway to transfer data between networks.

  • What is a router for?

Web cam is an

  • Input unit device
  • output unit device
  • Processing device
  • Input and Output device

7. What is the word 'pixel' short for?

  • picture element

Choose the storage device listed below

  • Earphones
  • Controller
  • SD Card
  • Mouse

Which of the following memories allows simultaneous read and write operations?

  • ROM
  • RAM
  • None of above

High level language is also called

  • Problem oriented language
  • Business oriented language
  • Mathematically oriented language
  • All of the above

Another name for main memory is:

  • a) secondary storage
  • b) primary storage
  • c) magnetic tape
  • d) hard disk

10. 'WYSIWYG' is a great little computer word. But what does it stand for?

  • What You See Is What You Get

Where to find resources on the host. The host is the webpage.

  • What does the location in a URL identify?

The smallest unit of memory. 8 bits = 1 byte.

  • Bit

Tick the input devices

  • Webcam
  • Webcam
  • Microphone
  • Screen
  • Keyboard
  • Mouse

A device that provides power to a computer.

  • Power Supply

It is a computer input device modeled from the keys of typewriter.

  • Game Pad
  • Mouse
  • Keyboard

When was vacuum tube invented?

  • 1900
  • 1906
  • 1910
  • 1880


  • Computer programs and games are called what?

Software in computer

  • Enhances the capabilities of the hardware machine
  • Increase the speed of central processing unit
  • Both of above
  • None of above

Resolution of an image is dependent on

  • color
  • pixel per inch
  • shape
  • screen

The earliest calculating devices are

  • Abacus
  • Clock
  • Difference Engine
  • None of these

Storage device that stores digitally encoded data on rapidly rotating disks with magnetic surfaces.

  • Hard Disc Drive

Microsoft Word is an example of ___________ software.

  • Application Software
  • System Software
  • Software
  • Operating System

Choose the output device listed below

  • Microphone
  • Speakers
  • Hard Disk Drive
  • Mouse

Read Only Memory- Permanent memory that cannot be changed. It makes the BIOS function. Checks your OS.

  • ROM

_Select all examples of input devices below.

  • Hard drive
  • Monitor
  • Microphone
  • Mouse

Programs designed to perform specific tasks is known as

  • System software
  • Application software
  • Utility programs
  • Operating system

Printed circuit board on which the CPU, RAM chips and other electronic circuit elements are located.

  • Motherboard

1. Which of the following is the lowest level of computer language?

  • machine language

Which of the following is machine independence program?

  • High level language
  • Low level language
  • Assembly language
  • Machine language

An integrated circuit is

  • A complicated circuit
  • An integrating device
  • Much costlier than a single transistor
  • Fabricated on a tiny silicon chip

The ALU of a computer responds to the commands coming from

  • Primary memory
  • Control Unit
  • External memory
  • Cache memory

How is each character stored in the computer-------------

  • Binary number

Most computer system have which six components?

  • Casing, Hard Drive, RAM, Graphics Card, CPU
  • Casing, Hard Drive, RAM, Motherboard, Graphics Card, CPU
  • Casing, Hard Drive, RAM, Motherboard, Power Supply Unit, CPU
  • Power Button, Graphics Card, USB ports, Bluetooth Antenna

Brain of the computer that performs instructions defined by software.

  • Central Processing Unit (CPU)

The decimal number 9 is represented by ________ in binary.

  • 1001

Machine language is

  • Machine dependent
  • Difficult to program
  • Error prone
  • All of above

Which of the following is the device that connects internal components together in a computer system?

  • Motherboard
  • RAM
  • CPU
  • Hard Disk Drive

What are the three decisions making operations performed by the ALU of a computer?

  • Grater than
  • Less than
  • Equal to
  • All of the above

What component is this...?

  • CPU
  • Hard Drive
  • Motherboard
  • RAM stick

A byte consists of

  • One bit
  • Four bits
  • Eight bits
  • Sixteen bits

The most common and widely used computer today which you can see in homes, schools, and in most businesses.

  • Microcomputers
  • Handheld Computers

Tells the operating system what type of program it needs to open.

  • What does a file extension tell your computer?

-------------is used to measure memory

  • Kmph
  • mtr
  • Mb and Gb
  • cm/in

RAM is type of --------

  • Hardware
  • Secondary memory
  • Input Device
  • Primary memory

Bitmap images are stored as a series of tiny dots called

  • Pixies
  • Pixels
  • Pixars
  • Pictures

They use computers to teach learners better and faster.

  • Teachers

Which of the following is not an electronic computer?

  • ABC

The smallest number that can be represented by 4 bits is:

  • 1
  • 0
  • 2
  • 3

Which one is the largest space?

  • Kilobyte
  • Petabyte
  • Terrabyte
  • Gigabyte

Printer, speaker.

  • Output device examples

A computer consists of

  • A central processing unit
  • A memory
  • Input and output unit
  • All of the above

The two kinds of main memory are:

  • Primary and secondary
  • Random and sequential
  • ROM and RAM
  • All of above

In a colour bit mapped graphic, if you use 4 bits for each pixel how many colours can you represent?

  • 32
  • 8
  • 16
  • 4

Full form of CPU is

  • Control Processing Unit
  • Central processing Unit
  • Central Processing Unix
  • Central Programming Unit

Any invention including tools, machines, techniques, and power sources.

  • Technology

An paste that is applied on the CPU to transfer the heat from the microprocessor to the heat sink/CPU fan.

  • Thermal Compound


  • Which of the following are you likely to find between multiple school buildings in an city wide school district?

A _________ is an electronic device that performs tasks based on instructions given by the user.

  • device
  • computer
  • electronic device
  • hardware

Name the component of the computer system that stores data that are currently being used by the CPU ___________________________________.

  • Main Memory

Which statement is valid about computer program?

  • It is understood by a computer
  • It is understood by programmer
  • It is understood user
  • Both a & b

Which one do you like?

  • Option 1
  • Option 2
  • Option 3
  • Option 4

Which of the following is NOT an embedded system?

  • Smartphone
  • Washing Machine
  • Cash Register
  • GPS

Software used to control the computers boot up and its peripheral equipment.

  • Operating System (OS)

Which of the following is the largest?

  • 0.2 Gigabytes
  • 100 Megabytes
  • 1000 Kilobytes
  • 1,000,000 bits

Which of the following terms is the most closely related to main memory?

  • Non volatile
  • Permanent
  • Control unit
  • Temporary

Properly arranged data is called

  • Field
  • Words
  • Information
  • File

The binary number 1101 represents the decimal number _______________

  • 13

John Napier invented Logarithm in

  • 1614
  • 1617
  • 1620
  • None of above

Name the component of the computer system that performs calculations and logic operations ______________________.

  • Arithmetic and Logic Unit

High density double sided floppy disks could store _____ of data

  • 1.40 MB
  • 1.44 GB
  • 1.40 GB
  • 1.44 MB


  • The official slang term for junk mail is what?

Operating system, editors, and debuggers comes under?

  • System Software
  • Application Software
  • Utilities
  • None of the above


  • Which component of a computer controls the entire system and is often called the brain of the computer?

Tick the backing storage devices

  • Hard drive
  • Hard drive
  • USB Memory stick
  • Webcam
  • SD Card

What is the Caesar's Cipher?

  • A way of password protecting a file
  • A simple encryption method that involves replacing each letter in a message with one ahead or behind in the alphabet
  • A complex encryption method using two keys
  • A complex encryption method using four keys

Which of the following device was not invented by Babbage?

  • Pascaline
  • Difference Engine
  • Analytical Engine
  • None of above

From the following which is an output device?

  • 3D printer
  • Keyboard
  • Mouse
  • Scanner

Which of the following machine was not invented by Charles Babbage?

  • Tabulating Machine
  • Analytical Engine
  • Difference Engine
  • Both C and D

It is the physical part of computer which includes the input and output devices.

  • CPU
  • Hardware
  • Input Unit
  • Software

Video file

  • A file extension of .mp4 means that the file contains what?

The activity of defrauding an online account holder of financial information by posing as a legitimate company.

  • What does a phishing email try to do?

Where information not being used by the CPU is stored.

  • Long-Term Memory

Which of the following is not input unit device?

  • Scanner
  • Camera
  • Plotter
  • Digitizer

2. The term 'GUI' stands for...

  • Graphical User Interface

These are set of guidelines and rules to follow when using the hardware, the software applications, and the data.

  • Algorithms
  • Instructions
  • Procedures
  • Programs

Tick two of the following options that are non-volatile

  • ROM
  • ROM
  • Solid State Drive

Convert 100101 to denary

  • 37

It is a collection of computer network that link billions of different computers around the world.

  • Internet
  • Bluetooth

The brain of any computer system is

  • ALU
  • Memory
  • CPU
  • Control unit

A computer disc usually used to store video/movies.

  • DVD

There is no separate code for every alphabet, color, number, symbol

  • True
  • False

Convert 83 to binary

  • 1010011

The ALU of a computer normally contains a number of high speed storage element called

  • Semiconductor memory
  • Registers
  • Hard disks
  • Magnetic disk

Information Technology merges the study of three areas. These includes Computer Science, Office Automation and ___________________________.

  • Information communication technology

These are the facts and facet of records that we input into the computer.

  • Data
  • Files
  • Record
  • Word

What is a backing storage device?

  • A backing storage device is a device that converts the results from the processor into data we can see or hear.
  • A backing storage device is a device that allows the user to save data to and to load data from.
  • A backing storage device is part of the processor of a computer.
  • A backing storage device is a device that allows the user to give the computer data.

It the most powerful computer available.

  • Mainframe Computer
  • Super Computer
  • Mid-range Computer

5. The first IBM PC was released to the public prior to 1985.

  • True

Types of storage devices

  • DVD
  • DVD
  • CD

Which of the following devices is an input and an output device?

  • Keyboard
  • Touch sensitive screen
  • Mouse
  • Printer

What component is this...?

  • CPU
  • Hard Drive
  • Motherboard
  • RAM stick

Devices used to insert data into a computer (keyboard, mouse, microphone, scanner, voice recognition)

  • Input

8. RAM refers to "Random Access Memory'

  • True

Operating system

  • What controls a computer's basic operations?

An electronic device that can store and process data to help users complete tasks. Ex: Refrigerators, phones, game systems, TV, eBooks, i Pods.

  • Which definition best describes a computer?

People who interact with the computer system, they are also called the end users.

  • Computer Operator
  • Computer Technician
  • System Analyst
  • System Programmer

Choose the input device listed below

  • Keyboard
  • Speakers
  • USB Stick
  • Monitor

"Father of the computer", Babbage is credited with inventing the first mechanical computer that eventually led to more complex designs.

  • Charles Babbage

How many bits would it take to represent this black and white image?

  • 10
  • 20
  • 25
  • 36

Random Access Memory - Volatile, temporary memory to store data while the PC is running and is erased when computer turns off.

  • RAM

Anytime access, ease of use, backup, document sharing.

  • What are the benefits of using a cloud storage option?

The basic operations performed by a computer are

  • Arithmetic operation
  • Logical operation
  • Storage and relative
  • All of the above

Which of the following is found in RAM when the computer is being used?

  • Software currently in use
  • The bootstrap
  • The motherboard
  • A USB stick

The central processing unit (CPU) consists of

  • Input, output and processing
  • Control unit, primary storage, and secondary storage
  • Control unit, arithmetic-logic unit and primary storage
  • Control unit, processing, and primary storage


  • In which of these places might you be most likely to find a peer-to-peer network?

Abacus was the first

  • Electronic computer
  • Mechanical computer
  • Electronic calculator
  • mechanical calculator

Set of instructions that tells the hardware what to do. It is what guides the hardware and tells it how to accomplish each task. Eg Microsoft Word, PowerPoint

  • Software

A physical connection between the microprocessor memory and other parts of the microcomputer is known as

  • Path
  • Address Bus
  • Route
  • All of the above

What is an output device?

  • An output device is a device that converts the results from the processor into data we can see or hear.
  • An output device is a device that allows the user to save data to and to load data from.
  • An output device is part of the processor of a computer.
  • An output device is a device that allows the user to give the computer data.

Instructions and memory address are represented by

  • Character code
  • Binary codes
  • Binary word
  • Parity bit

What is ASCII?

  • American Standard code for information interchange a computer program that contains the set of instructions needed to tell the hardware what to do

  • Hardware
  • Input device
  • Processing
  • Software

Which of the following is not an input device?

  • OCR
  • Optical scanners
  • Voice recognition device
  • COM (Computer Output to Microfilm)


  • The Internet is considered a WAN.

Keyboard, mouse, CPU, monitor, printer, speakers.

  • The main hardware components of a home computer are...

Which of the following are the best units of data on an external storage device?

  • Bits
  • Bytes
  • Hertz
  • Clock cycles

What type of data stored in the ROM?

  • Program files to execute
  • Permanent data
  • Currently working on file
  • short time data

Which part of the computer is used for calculating and comparing?

  • Disk unit
  • Control unit
  • ALU
  • Modem

A bit ______ graphic is one way of storing an image on a computer.

  • map

It is physical equipment that implements the data processing so that useful information may come as a result.

  • Hardware

The hard drive saves data

  • permanently

RAM saves data

  • temporarily

Which unit converts computer data into human readable form?

  • Input unit
  • Output unit
  • ALU
  • Control Unit

Who is the founder of Microsoft?

  • Bill Gates
  • Steve Jobs
  • Grace Hopper
  • Ada Lovelace

The program you are using and the data you are working with.

  • What would you find on a network?

The term gigabyte refers to

  • 1024 bytes
  • 1024 kilobytes
  • 1024 megabytes
  • 1024 gigabyte

Which of the following is true of ROM?

  • All data/instructions are lost when the power is turned off
  • Data/instructions can be edited when required
  • It is connected externally to the computer system
  • Contains the bootstrap

A device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image

  • Scanner

Text must be stored in a binary code in computers. this code is called:

  • Code for text
  • Alphabet code

How many elements a computer system have?

  • 4
  • 5
  • 6
  • None of the above

An electronic visual display for computers.

  • Monitor

What form of data does a computer store?

  • Alphanumeric
  • primary
  • Binary
  • High level

What is the date when Babbage conceived Analytical engine

  • 1642
  • 1837
  • 1880
  • 1850

From the following which is not an input device

  • Scanner
  • Touch Screen
  • Mouse
  • Printer

4. Who is usually referred to as the 'Father of Computers' ?

  • Charles Babbage

What type of data stored in the RAM.

  • Secondary storage
  • Temporary data
  • Operating system
  • Permanent data

Denary number system has base

  • 16
  • 8
  • 10
  • 2

Which backing storage device does a Raspberry Pi use?

  • USB Memory stick
  • Cloud storage
  • Hard drive
  • SD Memory Card

What is the encrypted text for "computer" when a Caesar cipher with a key value of A=d is used?

  • eqorwvgt
  • frpsxwhu
  • iusvazkx
  • frpsswhu

RAM is an example of which type of storage?

  • Volatile
  • Big
  • Non Volatile
  • Small

When was Pascaline invented?

  • 1617
  • 1620
  • 1642
  • 1837

Carbon Copy; Blind Carbon Copy

  • What do Cc and Bcc stand for?

An advanced computer pointing device that uses a light-emitting diode (LED)

  • Optical Mouse

A device that enables the computer to send and receive electronic communication signals for internet and email.

  • Modem

Which of the following storage devices can store maximum amount of data?

  • Floppy Disk
  • Hard Disk
  • Compact Disk
  • Magneto Optic Disk

Web browsers, word processors, accounting programs.

  • Application software examples

The difference between memory and storage is that memory is _____ and storage is __

  • Temporary, permanent
  • Permanent, temporary
  • Slow, fast
  • All of above

Which operation is not performed by computer

  • Inputting
  • Processing
  • Controlling
  • Understanding

Microsoft Excel document

  • A file extension of .xlsx means that the file contains what?

which is not input device

  • Scanner
  • Joy stick
  • plotter
  • Microphone

Devices that projects images, gives sound, and basically gives out the info from the computer (monitor, printer, projector, speakers)

  • Output

Hardware is:

  • a) a set of instructions
  • b) the part of the computer system you can see and touch
  • c) the electrical supply of the computer
  • d) does all of the above

A solid state drive is an example of which type of storage?

  • Volatile
  • Big
  • Non Volatile
  • Small

This is when the computers are linked to a network and enables sharing of information and files.

  • Connectivity
  • Data
  • Hardware
  • Software

Which of the following is not a form of data?

  • Numbers and characters
  • Images
  • Sound
  • None

An output device used to transmit sound.

  • Speakers

It refers to the people involved in the data processing operations such as the programmers, computer operators, and system analysts.

  • Hardware
  • Software
  • Peopleware
  • Procedure

Uniform Resource Locator

  • What does URL stand for?

The translator program used in assembly language is called

  • Compiler
  • Interpreter
  • Assembler
  • Translator

CD-ROM is a

  • Semiconductor memory
  • Memory register
  • Magnetic memory
  • None of above

Internet Protocol

  • What does IP stand for?

Provides a certain service and manages resources.

  • What does a server do?

How many kilobytes are in a megabyte? (type one number only)

  • 1000

Random Access Memory stores files temporarily being used by the CPU>

  • Which statement best defines 'RAM'?

Which computer was considered the first electronic computer until 1973 when court invalidated the patent?

  • MARK I
  • Z3
  • ABC

What is the responsibility of the logical unit in the CPU of a computer?

  • To produce result
  • To compare numbers
  • To control flow of information
  • To do math’s works

If volatile means that data is lost when the power is turned off, which term means that it is stored even without power?

  • non volatile

The acronym ROM stands for:

  • a) Random Only Memory
  • b) Read Only Memory
  • c) Read Optical Module
  • d) Random Organizing Memory

Full form of ALU is

  • Arithmetic Logic Unit
  • Arithmetic Legal Unit
  • Arithmetic Logic Unix
  • Arithmetic Localc Unit

Keyboard, screen, mouse, game pads, scanner.

  • Input device examples

Bit stands for

  • Binary digits
  • Bit of system
  • A part of byte
  • All of above

Which device can understand difference between data & programs?

  • Input device
  • Output device
  • Memory
  • Microprocessor

Which of the following is a read only memory storage device?

  • Floppy Disk
  • CD-ROM
  • Hard Disk
  • None of these

It is a social networking service and website started in February 2004. It was built by Mark Zuckerberg.

  • Instagram
  • Twitter
  • Facebook

Software has two types--------

  • Application and hardware
  • Keyboard and Operating system
  • System software and Application software
  • Operating system and Printer

Full form of WWW is

  • World Wide Web
  • World Wide Wax
  • World Web Wax
  • Word Wide Web