Computer Basics Quiz

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Questions and Answers

What do bits represent in a computer?

Magnetic states

Electric charges

Binary digits (correct)

Voltage levels

Which of the following is NOT a type of internal memory?

RAM

ROM

Hard Disk (correct)

Flash Drive (correct)

What is the highest memory size mentioned in the content?

Terabyte

Kilobyte

Gigabyte

Yottabyte (correct)

What effect does more RAM have on a computer's performance?

It allows more programs to run simultaneously Signup and view all the answers

Which component is designed to erase data when the computer is turned off?

RAM Signup and view all the answers

What is the primary function of input devices?

To input data into the computer Signup and view all the answers

Which of the following is NOT a part of a computer system?

Transmission devices Signup and view all the answers

Which device is used to display output from a computer?

Monitor Signup and view all the answers

What type of device is a hard disk classified as?

Storage device Signup and view all the answers

What is the main use of a mouse in a computer system?

To click and drag objects on the screen Signup and view all the answers

Which of the following statements accurately describes a computer?

A computer performs tasks using various devices. Signup and view all the answers

What does a CD-ROM primarily function as?

To store data Signup and view all the answers

Which component is specifically designed to accept data and instructions from the user?

Keyboard Signup and view all the answers

Which input device is primarily used for entering data and instructions by typing?

Keyboard Signup and view all the answers

What is the main purpose of a mouse in a computer system?

To control pointer movement and select objects Signup and view all the answers

Which of the following describes a touch pad?

A touch-sensitive area used to control pointer movement on a laptop Signup and view all the answers

Which input device is specifically designed to record voice, music, and sound?

Microphone Signup and view all the answers

What is the primary function of a trackball compared to a mouse?

To allow rolling a ball for pointer movement Signup and view all the answers

Which device allows users to select objects on a screen by drawing directly on it?

Light Pen Signup and view all the answers

What is the primary function of a scanner?

To input text or pictures into a computer Signup and view all the answers

What role does the Central Processing Unit (CPU) serve in a computer?

It processes and stores information Signup and view all the answers

Which input device is primarily used for video conferencing and live chats?

Web Camera Signup and view all the answers

What technology does a touch screen utilize to allow users to select objects directly?

Capacitive touch Signup and view all the answers

What does the full form of DVD stand for?

Digital Video Disk Signup and view all the answers

Which of the following features describes a Blu-ray Disk?

Can store up to 128 GB of data Signup and view all the answers

What is a notable feature of flash drives?

They are known for being removable and lightweight Signup and view all the answers

Which of the following best describes a memory card?

Used for portable devices such as mobiles and cameras Signup and view all the answers

What is the primary use of multimedia cards?

They act as storage memory for various portable devices Signup and view all the answers

What is the primary disadvantage of a Dot Matrix Printer?

It is very noisy. Signup and view all the answers

Which printer is most suitable for high-quality prints?

Laser Printer Signup and view all the answers

What format does a computer understand for data storage?

Bits and Bytes Signup and view all the answers

Which of the following is classified as primary memory?

ROM (Read Only Memory) Signup and view all the answers

What is essentially a characteristic of RAM?

It is volatile memory. Signup and view all the answers

Which storage device retains data permanently?

ROM Signup and view all the answers

What does a printer convert digital data into?

Hard Copy Signup and view all the answers

What is the first step to use a printer as described in the activity zone?

Open Paint and draw a scenery. Signup and view all the answers

What is the primary function of output devices?

To display results after processing Signup and view all the answers

Which of the following is NOT a type of memory in a computer?

Processor memory Signup and view all the answers

What is the common name for a Flash drive?

Pen drive Signup and view all the answers

Which statement is true regarding the CPU's functions?

It is responsible for managing all jobs of a computer. Signup and view all the answers

How many gigabytes are in 1 megabyte?

0.001 GB Signup and view all the answers

What is the main purpose of ROM (Read Only Memory)?

To hold startup instructions for the computer Signup and view all the answers

Which of the following statements is true about external memory?

It is also known as secondary memory Signup and view all the answers

How much data can a standard CD (Compact Disk) hold?

700 MB Signup and view all the answers

What is a primary characteristic of hard disks?

They are fixed inside the CPU box Signup and view all the answers

Which of the following statements correctly describes a flash drive?

It is a backup device used for portable storage Signup and view all the answers

What type of information can a DVD (Digital Versatile Disc) store?

High-quality video and audio Signup and view all the answers

What is the disadvantage of accessing data from secondary memory compared to internal memory?

It takes more time to access data Signup and view all the answers

Which storage device is described as being portable and often resembles a keychain?

Flash drive Signup and view all the answers

Study Notes

Computer System Overview

A computer is an electronic device that processes data and gives meaningful results.
Functions of a computer: Input, Processing, and Output.
Computers are widely used in various settings including shops, schools, hospitals, and banks.

Parts of a Computer

Input Devices: Input data into the computer (e.g., Keyboard, Mouse).
Output Devices: Display results of processed data (e.g., Monitor, Printer).
Storage Devices: Store data and programs (e.g., Hard Disk, CD-ROM).
Processing Device: Central Processing Unit (CPU) that processes data according to instructions.

Input Devices

Keyboard: Standard keyboard has 104 keys, divided into typing, function, navigation, and control keys.
Mouse: Hand-held pointing device used for selecting and controlling objects on the screen.
Microphone: Captures voice and sound recordings.
Touch Pad: A touch-sensitive pad on laptops, used instead of a mouse.
Touch Screen: Allows user interaction by touching the display directly, found in tablets and smartphones.
Light Pen: A pen-like device for selecting and drawing on the screen.
Scanner: Converts physical documents into digital format; includes Flat Bed, Sheet Fed, and Hand Held scanners.
Digital Camera: Captures photos and videos, stored on a memory chip.
Web Camera: Captures images and videos for live communication over the internet.

Processing Device

Central Processing Unit (CPU): The brain of the computer, processes data and performs calculations.

Output Devices

Printer: Produces physical copies of digital documents; types include:
- Dot Matrix Printer: Noisy, creates impressions by striking paper; low quality.
- Inkjet Printer: Sprays ink for high-quality prints; used for personal documents.
- Laser Printer: High-speed printing using laser technology; ideal for professional use.

Storage Devices

Internal (Primary) Memory:
- RAM (Random Access Memory): Temporary working memory; data lost when turned off.
- ROM (Read Only Memory): Permanent instructions for startup; data retained when turned off.
External (Secondary) Memory:
- Hard Disk: Primary storage medium; can hold large amounts of data (up to 8 TB).
- CD/DVD: Optical devices for storage; CDs hold up to 700 MB, DVDs 4.7 to 17 GB.
- Flash Drive (Pen Drive): Portable storage device; can hold up to 4 TB.
- Memory Card: Used in portable devices; transferred via card readers.

Bits and Bytes

Data represented in binary form (0s and 1s), stored as bits and bytes.
8 bits = 1 byte, with scaling from kilobytes (KB) to zettabytes (ZB).
Memory hierarchies include various capacities for efficient data storage.

Additional Facts

The QWERTY keyboard was invented by Sir Christopher Latham Sholes.
The computer mouse was invented by Dr. Engelbart.
Laser printers were developed by Gary Starkweather at Xerox in 1969.
The amount of RAM affects a computer's ability to run multiple applications efficiently.

Practical Tips

To print a document, save the file in a program (e.g., Paint), then access the print option from the file menu.
Data manipulation involves transferring programs from external memory to internal memory for processing.

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Description

Test your knowledge about the fundamental components and functions of computers. This quiz covers input, processing, and output devices, as well as the basic architecture of a computer system. Perfect for beginners or anyone looking to refresh their understanding of computers.