Computer Input and Output Devices Quiz
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Questions and Answers

What is a key disadvantage of using a webcam?

  • They are cheaper than digital cameras.
  • They can function without a computer.
  • They offer high-resolution images.
  • They often have poor picture quality. (correct)

Which advantage is associated with digital cameras?

  • They require no editing software.
  • They do not need computer literacy to operate.
  • They produce better quality photographs than traditional cameras. (correct)
  • They enhance images automatically.

What is a significant disadvantage of using a scanner?

  • Scanners are not faster than typing.
  • Scanners do not store images.
  • They cannot recover damaged documents.
  • The quality can be limited by scanner resolution. (correct)

What advantage does a microphone offer compared to typing?

<p>It is faster to input text than using a keyboard. (B)</p> Signup and view all the answers

Which of the following is a disadvantage of using a barcode reader?

<p>Barcodes can be swapped affecting pricing. (B)</p> Signup and view all the answers

What is an essential function of output devices?

<p>They display information in a format that is understandable to users. (B)</p> Signup and view all the answers

Which of the following output devices primarily converts data into audio format?

<p>Speaker (A)</p> Signup and view all the answers

What is a common disadvantage of microphones?

<p>Voice typing is generally less accurate than manual typing. (C)</p> Signup and view all the answers

What is a common feature of wired keyboards?

<p>They are connected to the computer via a wire. (D)</p> Signup and view all the answers

Which keyboard layout is most widely used?

<p>QWERTY (D)</p> Signup and view all the answers

What is one of the functions of a digital camera?

<p>To capture and store images digitally. (B)</p> Signup and view all the answers

What technology allows wireless keyboards to operate without cords?

<p>Radio frequency (RF) technology. (A)</p> Signup and view all the answers

What type of device is a light pen most similar to in function?

<p>Touchpad. (D)</p> Signup and view all the answers

How can one issue commands to a computer using a keyboard?

<p>By pressing specific keys. (A)</p> Signup and view all the answers

Which of the following statements about touch screens is NOT correct?

<p>They can capture images and store them. (D)</p> Signup and view all the answers

What is a primary use of a computer keyboard?

<p>To type text data. (C)</p> Signup and view all the answers

What is the primary distinction between hardcopy and softcopy in computer output?

<p>Hardcopy is produced by printers while softcopy is displayed on screens. (C)</p> Signup and view all the answers

Which of the following monitors uses a cathode-ray tube?

<p>CRT Monitor (A)</p> Signup and view all the answers

What happens inside a cathode-ray tube to create an image on the screen?

<p>Electrons are fired at a phosphor-coated screen. (A)</p> Signup and view all the answers

What is the main function of a monitor in a computer system?

<p>To display processed information to the user. (C)</p> Signup and view all the answers

What type of monitor typically uses liquid crystal displays to show information?

<p>LED Monitor (A)</p> Signup and view all the answers

What role does the anode play in a cathode-ray tube monitor?

<p>It positively charges the electrons emitted by the cathode. (D)</p> Signup and view all the answers

Which of the following best describes an LED monitor?

<p>It combines liquid crystals with light-emitting diodes for display. (A)</p> Signup and view all the answers

Which of the following is NOT a common size for CRT monitors?

<p>32 inches (C)</p> Signup and view all the answers

What process involves transferring data from memory to a storage medium?

<p>Writing (B)</p> Signup and view all the answers

Which storage device typically has a larger capacity than a floppy disk?

<p>Pen drive (A), External hard disk (D)</p> Signup and view all the answers

How many bytes are approximately in a gigabyte (GB)?

<p>1 billion bytes (C)</p> Signup and view all the answers

What is the exact number of bytes in a kilobyte (KB)?

<p>1,024 bytes (C)</p> Signup and view all the answers

Which of the following categories is NOT a type of computer storage?

<p>Tertiary Storage (B)</p> Signup and view all the answers

What unit is used to represent the smallest amount of data that a computer can process?

<p>Bit (A)</p> Signup and view all the answers

Which type of memory refers to Random Access Memory (RAM)?

<p>Primary Storage (C)</p> Signup and view all the answers

How much data can a terabyte (TB) approximately hold?

<p>1 trillion bytes (C)</p> Signup and view all the answers

Which type of optical disc allows data to be both read and written, but not erased?

<p>DVD-R (C)</p> Signup and view all the answers

What is one of the recommended practices for caring for optical discs?

<p>Hold the disc by its edges. (B)</p> Signup and view all the answers

Which type of optical disc can be erased and reused multiple times?

<p>DVD-RW (C)</p> Signup and view all the answers

What is a common use of optical discs?

<p>Transferring data between devices (C)</p> Signup and view all the answers

In terms of data storage capacity, which of these is the correct order from highest to lowest?

<p>Hard Disk Drive &gt; Pen Drive &gt; CD (B)</p> Signup and view all the answers

Which of the following types of optical discs can only be read and not written or erased?

<p>CD-ROM (B)</p> Signup and view all the answers

Which storage device has the fastest access time?

<p>RAM (D)</p> Signup and view all the answers

Which guideline is NOT recommended for the care of optical discs?

<p>Expose discs to excessive heat (D)</p> Signup and view all the answers

What is the primary function of the start screen in Windows 10?

<p>To access the most used applications and all installed apps (B)</p> Signup and view all the answers

Which of the following accurately describes the function of tiles in Windows 10?

<p>They serve as shortcuts that allow launching apps with one click (A)</p> Signup and view all the answers

What does a thumbnail provide for folders or files?

<p>A small image preview for easy identification (C)</p> Signup and view all the answers

Which step is NOT part of enabling thumbnail preview in Windows 10?

<p>Click on 'Create a new folder' to enable thumbnails (B)</p> Signup and view all the answers

What is the purpose of a folder in a computer system?

<p>To serve as a storage space for files and other folders (C)</p> Signup and view all the answers

Which statement about files is incorrect?

<p>Files can only contain text information. (B)</p> Signup and view all the answers

What defines a system folder?

<p>A folder containing information about the operating system. (D)</p> Signup and view all the answers

How can a subfolder be defined?

<p>A folder within another folder. (A)</p> Signup and view all the answers

Flashcards

Keyboard

A device used to input data into a computer by pressing keys.

Keyboard layout

Arrangement of keys on computer keyboards (e.g., QWERTY).

Wired keyboard

Keyboard connected to a computer using a wire.

Wireless keyboard

Keyboard that connects to a computer wirelessly (e.g., using Bluetooth).

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Digital camera

Input device that captures and stores images digitally.

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Light pen

Pen-like device used to select things on a computer screen or draw.

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Touch screen

Display that reacts to touch input.

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Input device

Any device that sends data to a computer.

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Webcam Advantage 1

Webcams allow people to communicate without travel.

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Digital Camera Advantage 1

Digital cameras produce higher quality photos than traditional cameras.

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Scanner Advantage 1

Scanners allow storing images for later editing.

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Microphone Advantage 1

Microphones allow faster text input than keyboards (voice typing).

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Output Device Definition

An output device displays info to the user. (e.g., text, graphics, audio, video).

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Output Device Example

A monitor, printer, or projector are examples.

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Barcode Reader Disadvantage 1

Implementing barcode readers is expensive due to item barcodes and system entry needs.

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Digital Camera Disadvantage 1

A user needs computer skills to use the camera properly.

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Hardcopy

Tangible computer output, like printed materials.

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Softcopy

Intangible computer output, like a computer screen display.

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Monitor (VDU)

An output device that displays computer information.

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CRT Monitor

A monitor using a cathode-ray tube to display images.

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LED Monitor

A monitor using light-emitting diodes for display.

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Cathode-ray tube (CRT)

A device using electrons to create images on a screen.

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Phosphor

Material that glows upon electron impact. Part of CRTs.

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Storage Device

A piece of hardware that saves and retrieves data to and from storage media.

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Writing (Storage)

The process of transferring data from memory to a storage medium.

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Reading (Storage)

The process of transferring data from storage medium into memory.

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Storage Capacity

The amount of data a storage medium can hold, measured in bytes.

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Bit

The smallest unit of data a computer can process, represented as a 0 or 1.

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Byte

A group of 8 bits that represent a single character.

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Kilobyte (KB)

Approximately 1,000 bytes of data.

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Megabyte (MB)

Approximately 1 million bytes of data.

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Start screen

The initial display of a computer that provides access to apps and programs.

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Tiles

Shortcuts for Windows 10 apps displayed on the Start screen.

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Folder

An electronic container for storing files and other folders.

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Sub-folder

A folder located inside another folder.

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System folder

A folder created by the operating system that contains critical files.

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Program folder

A folder that contains files related to an installed program.

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Thumbnail

A small image that provides a preview of a file or folder's contents.

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Optical Disc Types

Optical discs come in three main categories: Read Only Memory (ROM), Recordable (R), and Rewritable (RW). ROM discs can only be read, R discs can be written to once, and RW discs can be written to and erased multiple times.

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Optical Disc Care

Proper care helps protect your optical discs from damage. Never bend, expose to extreme heat or sunlight, touch the underside, and always hold by the edges.

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Uses of Optical Discs

Optical Discs like CDs, Blu-ray and DVDs are used for data transfer between devices, software delivery, storing large amounts of data (videos, photos, music), and backups.

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Storage Device Capacity Order

Storage devices can be ordered by their capacity (the amount of data they can hold). Hard Drives have the largest capacity, followed by Memory Cards, Pen Drives, CDs, and Floppy Disks.

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Storage Device Access Time Order

Access time refers to how quickly a device can retrieve data. RAM (Random Access Memory) has the fastest access time, followed by Hard Drives, Pen Drives, and CD-ROM Drives.

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Uses of Storage Devices

Storage devices play a vital role in computers. They store data, make backups, transfer data between devices, and share information.

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First Generation Computers

First-generation computers used vacuum tubes as their primary component, making them large, slow, and unreliable.

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Third Generation Computers

Third-generation computers used integrated circuits (ICs) which were smaller, faster, and more reliable, making them more advanced.

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Study Notes

Computing for Junior High Schools Basic 7-9

  • This textbook is based on the updated curriculum for computing issued by the National Council for Curriculum and Assessment (NaCCA) of the Ghana Education Service/Ministry of Education.
  • It covers computing topics for Junior High Schools, Basic 7-9.
  • Copyright is held by E. H. Mantey, 2023.
  • Contact information for the author is provided.

Content

  • The book contains content for Basic 7, 8, and 9.

Acknowledgement

  • The author is grateful to God for the direction and strength to complete the task.
  • Thanks are given to Rev. J.K. Bempong for advice and spiritual support.
  • Appreciations are extended to Mr. Awuni Samuel and Mr. Richard Mensah Gyapong for their support and corrections.
  • Gratitude to the Mantey family for their assistance.

Dedication

  • The book is dedicated to the author's late Grand Father T. S. Danquah and children Eden Danquah Mantey, and Jason Jude Mantey.

Table of Contents

  • The table of contents provides page numbers for each strand and sub-strand.
  • Strands include Introduction to Computing, Productivity Software, Communication Networks, and Computational Thinking.

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Achievers Computing for JHS Basic 7-9 PDF

Description

Test your knowledge on the advantages and disadvantages of various computer input and output devices. This quiz covers topics including webcams, microphones, scanners, keyboards, and digital cameras. Understand their functions and the technology behind them.

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