Input and Output Devices

Multiple Choice Questions

Question 1

Which of the following is not an I/O device?

1. Printer
2. CPU
3. Plotter
4. Scanner

Answer

CPU

Reason — CPU is the brain of the computer Printer and plotter are output devices and scanner is an input device.

Question 2

Which of the following is not a pointing device?

1. Mouse
2. Light pen
3. Keyboard
4. Trackball

Answer

Keyboard

Reason — Keyboard is not a pointing device. Mouse, light pen and trackball are pointing devices.

Question 3

Which of the following is not a storage device?

1. CD ROM
2. DVD
3. Plotter
4. Flash drive

Answer

Plotter

Reason — Plotter is an output device. CD ROM, DVD and flash drive are storage devices.

Question 4

Whom do you think is the most probable user of a Light Pen?

1. Computer Programmer
2. Graphic Designer
3. Journalist
4. Scientist

Answer

Graphic Designer

Reason — Graphic Designer is the most probable user of a Light Pen.

Question 5

Name the type of mouse which uses laser technology to detect the motion of the ball.

1. Optical mouse
2. Mechanical Mouse
3. Opto Mechanical mouse
4. All of these

Answer

Optical mouse

Reason — Optical mouse uses laser technology to detect the motion of the ball.

Question 6

Which is a vector based graphical printing device?

1. Printers
2. Plotters
3. Scanners
4. Light pen

Answer

Plotters

Reason — Plotter is a vector based graphical printing device.

Question 7

Which device scans images, documents, and saves them on a computer as a digital image?

1. MICR
2. Joystick
3. Scanner
4. None of these

Answer

Scanner

Reason — Scanner scans images, documents, and saves them on a computer as a digital image.

Question 8

Which type of plotter is used to produce continuous output such as plotting earthquake activity?

1. Drum plotter
2. Flatbed plotter
3. Disk platters
4. None of these

Answer

Drum plotter

Reason — Drum plotter is used to produce continuous output such as plotting earthquake activity.

Question 9

The diameter of the standard CD is ............... .

1. 70 mm
2. 80 mm
3. 120 mm
4. 180 mm

Answer

120 mm

Reason — The diameter of the standard CD is 120 mm.

Question 10

The rate of data transmission of a DVD is faster than ............... .

1. Blu-ray Disk
2. CD-ROM
3. Hard disk
4. Memory stick

Answer

CD-ROM

Reason — The rate of data transmission of a DVD is faster than CD-ROM.

Question 11

The disk which uses blue violet laser to read and write is ............... .

1. DVD
2. Flash drive
3. Blu-ray Disk
4. CD ROM

Answer

Blu-ray Disk

Reason — The disk which uses blue violet laser to read and write is Blu-ray Disk.

Question 12

The ............... offers more than five times the storage capacity of a traditional DVD.

1. CD
2. Light pen
3. Blu-ray Disk
4. Flash drive

Answer

Blu-ray Disk

Reason — The Blu-ray Disk offers more than five times the storage capacity of a traditional DVD.

Question 13

A portable memory data storage device which is mainly used to transfer files from the hard drive of one computer to another is ............... .

1. Flash drive
2. Blu-ray Disk
3. Memory stick
4. CD-ROM

Answer

Flash drive

Reason — A portable memory data storage device which is mainly used to transfer files from the hard drive of one computer to another is Flash drive.

Question 14

Which removable flash memory card format was launched in 2003 as a joint effort of Sony and Scan Disk?

1. Memory Stick Duo
2. Memory Stick Pro
3. Magic Gate
4. None of these

Answer

Memory Stick Pro

Reason — Memory Stick Pro is a removable flash memory card format was launched in 2003 as a joint effort of Sony and Scan Disk.

Question 15

The speed of a Dot Matrix printer is measured in ............... .

1. dpi
2. cps
3. bits
4. All of these

Answer

cps

Reason — The speed of a Dot Matrix printer ranges from 50 (characters per second) to 500 (characters per second).

Question 16

Dot-Matrix printer is a type of ............... .

1. Impact printer
2. Non-Impact printer
3. Manual printer
4. Matrix printer

Answer

Impact printer

Reason — Dot-Matrix printer is a type of impact printer.

Question 17

Which of the following is an output device?

1. Mouse
2. CPU
3. VDU
4. Joystick

Answer

VDU

Reason — Visual Display Unit (VDU) is an output device.

Question 18

A laser printer uses ............... .

1. Heat sensitive paper
2. Spray ink
3. Photocopy technology
4. None of these

Answer

Photocopy technology

Reason — A laser printer uses Photocopy technology.

Question 19

Which of the following is used as an internal memory?

1. CD ROM
2. PROM
3. Hard disk
4. Memory stick

Answer

PROM

Reason — Programmable ROM (PROM) is used as an internal memory.

Question 20

Main memory is ............... in nature.

1. Non-volatile
2. Volatile
3. Both 1 and 2
4. None of these

Answer

Both 1 and 2

Reason — RAM and ROM are both main memory. RAM is a volatile memory and ROM is a non-volatile memory.

Question 21

MICR stands for ............... .

1. Magnetic Ink Character Reader
2. Magnetic Inch Character Reader
3. Magnetic Ink Code Reader
4. None of these

Answer

Magnetic Ink Character Reader

Reason — MICR stands for Magnetic Ink Character Reader.

Fill in the blanks

Question 1

The printed information on the paper is called ............... .

Answer

The printed information on the paper is called hardcopy.

Question 2

The first scanner was the ............... scanner introduced in 1957.

Answer

The first scanner was the Drum scanner introduced in 1957.

Question 3

............... printers produce images by spraying tiny droplets of ink onto the paper.

Answer

Ink-jet printers produce images by spraying tiny droplets of ink onto the paper.

Question 4

............... is a type of scanner that can detect marks made with ink or pencil.

Answer

Optical Mark Reader (OMR) is a type of scanner that can detect marks made with ink or pencil.

Question 5

............... is the light sensitive pointing device.

Answer

Light pen is the light sensitive pointing device.

Question 6

............... is used to read characters from a printed page to the computer.

Answer

Optical Character Reader (OCR) is used to read characters from a printed page to the computer.

Question 7

A CD can hold up to ............... MB of data whereas a DVD can hold upto ............... GB of data.

Answer

A CD can hold up to 900 MB of data whereas a DVD can hold upto 17 GB of data.

Question 8

Memory stick was launched by ............... in October 1993.

Answer

Memory stick was launched by Sony in October 1993.

Question 9

............... is a new optical disk format that is rapidly replacing DVD.

Answer

Blu-ray Disk is a new optical disk format that is rapidly replacing DVD.

Question 10

The ............... prints its output on special heat sensitive paper.

Answer

The Thermal Printer prints its output on special heat sensitive paper.

State True or False

Question 1

A scanner is an output device.

Answer

False

Reason — A scanner is an input device.

Question 2

Storage capacity of a DVD is more than the capacity of Blu-ray Disk.

Answer

False

Reason — Blu-ray disk can store upto 6 times the data stored in a regular DVD.

Question 3

Inkjet is a non-impact printer.

Answer

True

Reason — Inkjet is a non-impact printer.

Question 4

An LCD monitor allows the user to input information by touching the icons on the screen.

Answer

False

Reason — ♦A touch screen isa special monitor that allows the user to input information by touching the icons on the screen.

Question 5

Speech software is an output device to play sound.

Answer

False

Reason — Speaker is an output device to play sound.

Question 6

Bar Code Reader is an input device used for marking objective type questions.

Answer

False

Reason — Optical mark Reader is an input device used for marking objective type questions in various examinations.

Question 7

There are two types of printers.

Answer

True

Reason — There are two types of printers — Impact Printer and Non-impact Printers.

Question 8

A Flatbed plotter is also known a Roller plotter.

Answer

False

Reason — A Flatbed plotter is also known as a Table Plotter.

Question 9

A microphone is an input device used to record and store sound into a computer.

Answer

True

Reason — A microphone is an input device used to record and store sound into a computer.

Question 10

There are 12 Function keys on the keyboard.

Answer

True

Reason — There are 12 Function keys on the keyboard.

Question 11

Objects are created in 3D using additive process.

Answer

True

Reason — Objects are created in 3D using additive process.

Application Based Questions

Question 1

Kartik is applying for a graduate engineering program in a university. He wants to email his application along with the copies of his certificates. Which device will he prefer to create a digital copy of his certificates to attach with his application?

Answer

Kartik can use a scanner.

Question 2

Meenu wants to create a high quality drawing in a variety of colours. Which device should she use for the same?

Answer

Meenu can use a light pen to create a high quality drawing in a variety of colours.

Question 3

A Model school requires 1000 copies of high quality black and white printouts quickly. It requires the output to be printed quietly since an important meeting is being conducted in the office. Specify the type of printer for the above assignment.

Answer

Laser printer will be ideal for the above assignment.

Question 4

I am a printer which operates like a typewriter. Identify me.

Answer

Daisy Wheel Printer operates like a typewriter.

Question 5

Rita wants to enter numbers at a fast pace to perform mathematical calculations. Which type of keys will you suggest her to input data from the keyboard?

Answer

Rita can use the numeric keypad present on the right side of the keyboard.

Question 6

Little Scholars Public School wants to take a backup of its school management information software for record purpose. Which storage device is the most suitable for this large amount of information?

Answer

A hard disk is the most suitable storage device for storing this large amount of information.

Question 7

Mohit requires a black and white print out of his presentation on 'Reduction of Waste in the Environment'. He needs two copies of the presentation. Which printer is best suited for this work?

Answer

He can use laser printer.

Short Answer Type Questions

Question 1

Which type of printer does not use physical impact while transferring characters to paper?

Answer

Non-impact printer does not use physical impact while transferring characters to paper.

Question 2

Name two types of Impact printers.

Answer

Two types of Impact printers are:

1. Daisy Wheel Printer
2. Dot Matrix Printer

Question 3

Name the device which is used to give instruction to the computer.

Answer

Input devices are used to give instruction to the computer.

Question 4

What are the four components of a computer?

Answer

The four components of a computer are:

1. Input unit
2. Central Processing unit
3. Output unit
4. Secondary Storage unit

Question 5

Name any two pointing devices.

Answer

Two pointing devices are mouse and joystick.

Question 6

Write the types of plotters. Name any two manufacturers of plotters.

Answer

The types of plotters are :

1. Flatbed Plotter
2. Drum Plotter

Two manufacturers of plotters are Hewlett Packard and Roland.

Question 7

What is the storage capacity of Blu-ray Disk in GB?

Answer

Blu-ray disk can hold upto 25 GB of data on a single layer and 50 GB of data on a dual layer disk.

Question 8

Name the versions and format of a DVD.

Answer

The versions of a DVD are single-sided and double-sided.

A DVD is available in many formats such as :

1. DVD - R
2. DVD - RW
3. DVD - R and DVD - RW have two additional formats, which are + and -. For example: DVD - R and DVD + R.

Question 9

When and by whom was hard disk invented? Write the other name of hard disk.

Answer

Hard disk was introduced in 1954 by an IBM team led by Rey Johnson. The other name of hard disk is Winchester Disk.

Question 10

Write the full form of VDU, CD-ROM, MICR, OCR, and OMR.

Answer

VDU — Visual Display Unit

CD-ROM — Compact Disk - Read Only Memory

MICR — Magnetic Ink Character Reader

OCR — Optical Character Reacher

OMR — Optical Mark Reader

Question 11

Name the port which is used to connect a Flash drive.

Answer

Flash drive is plugged into the USB port of the computer.

Question 12

Define some places where you find the application of touch screen.

Answer

Some places where we can find the application of touch screens are:

1. ATMs (Automated Teller Machines) use touch screens for user input and help in completing transactions.
2. Touch-sensitive whiteboards are commonly used in educational settings.
3. Many video game consoles utilize touch screens for gameplay and navigation.
4. Point-of-Sale (POS) Systems use touch screen in retail, restaurants, and hospitality for processing transactions and managing orders.
5. Automotive touch screens in cars allow drivers to control navigation, entertainment and climate settings in vehicles.
6. Touch screens are used in ticket vending machines at subway stations, bus stops, and railway stations.

Long Answer Type Questions

Question 1

List the different types of mouse. Explain them.

Answer

The different types of mouse are as follows:

1. Mechanical Mouse — This type of mouse has a metal or rubber ball on its lower side that can roll in all the directions. The screen pointer moves according to the movement of the ball which is detected by the mechanical sensors within the mouse.
2. Opto-Mechanical Mouse — This type of mouse uses a mechanism similar to the mechanical mouse. The only difference is that it uses optical sensors to detect the movement of the ball.
3. Optical Mouse — An optical mouse does not have any mechanical moving parts. The laser technology is used to detect the movement of the mouse. It is more efficient and expensive than the Mechanical and Opto-Mechanical mouse.

Question 2

Differentiate between Impact and Non Impact printers.

Answer

Question 3

Discuss the features and applications of an MICR.

Answer

MICR stands for Magnetic Ink Character Recognition. This technology allows computers to read information from the printed documents.

1. MICR characters are printed in special typefaces with a magnetic ink or toner, usually containing iron oxide.
2. As a machine decodes the MICR text, it first magnetizes the characters in the plane surface of the paper.
3. The characters are passed over an MICR read head, a device similar to the playback head of a tape recorder.
4. As each character passes over the head, it produces a unique wave form that can easily be identified by the system.
5. MICR codes can easily be read by humans.

MICR is used mainly by the banking industry to:

1. Ease the processing and clearance of cheques
2. Streamline the processing and clearance of other documents
3. Identify the document's originality

Question 4

Write the difference between a DVD and a CD.

Answer

Question 5

Explain the functions and usage of a bar code reader.

Answer

A barcode reader is an input device that scans barcodes and decodes the information they contain. A bar code is a combination of dark and light stripes. It is a computer readable representation of information, present in visual format. A bar code reader consists of a light source, a lens, and a light sensor for translating the optical impulses into electrical signals.

Barcode readers are used for a variety of purposes such as :

1. Tracking inventory
2. Processing transactions
3. Asset tracking
4. Package tracking
5. Time and attendance
6. Software upgrades

Question 6

Explain the three main types of Non Impact printers.

Answer

The three main types of Non Impact printers are:

1. Thermal Printers — Thermal printers use a special heat sensitive paper. Characters are formed when heated elements come in contact with the heat sensitive paper, thus forming darkened dots. The standard of print produced is poor. Thermal printers are widely used in battery powered equipments, such as portable calculators.
2. Ink-jet Printers — They produce images by spraying tiny droplets of ink onto the paper. They have very high quality output and can also produce coloured graphics. These printers are less noisy. The average quality of inkjet printers is 300 dpi (dots per inch). They use coloured cartridges which combine magenta, yellow, and cyan inks to create colour tones. A black cartridge is also used for crisp monochrome output. They are cheap and ideal for home/office.
3. Laser Printers — Laser printers use photocopy technology to print. They use a laser beam and dry powdered ink to produce a fine dot matrix pattern. The quality of output on paper is very good. They can also produce very high quality images. They are mostly used for DTP (Desktop Publishing) purpose. They can print about 6 to 10 pages per minute. They have a very high resolution ranging from 600-1200 dpi (dots per inch).

Question 7

Write the types of monitors? Explain their features.

Answer

The different types of monitors are:

1. Cathode Ray Tube (CRT) Monitors — The features of a CRT monitor are:

   1. CRT monitors consist of an electron gun.
   2. In these monitors, a beam of electrons lights up the pixels/phosphor dots, which form the inner coating of the screen.
   3. Colour is achieved by combining Red, Green, and Blue (RGB) shades of different intensities.
   4. CRT monitors are bulky and occupy a lot of space.
   5. They are available in various sizes, like 14 inches, 15 inches, 17 inches, and 21 inches.
   6. A CRT monitor still has better contrast ratios and viewing angles than any other type of computer monitor.

2. Liquid Crystal Display (LCD) Monitors — The features of LCD monitors are :

   1. LCD monitors are relatively thinner and lighter than CRT monitors.
   2. They use the light modulating properties of Liquid Crystals (LCs).
   3. Liquid Crystals do not emit light directly.
   4. They save a lot of space and can be mounted on walls.
   5. They provide a wide viewing angle and come in various sizes ranging from 17 inches to 60 inches.
   6. They display sharp images and require less power to run.
   7. They are used in a wide range of applications including computer monitors, television, instrumental panels, aircraft cockpit displays, etc.
   8. They are also used in devices, such as clocks, watches, calculators, gaming devices, and telephones.

3. Light Emitting Diode (LED) Monitor — LED display has the following features:

   1. LED monitors are light emitting diodes that act as performance boosters in them.
   2. LED monitors offer better colour quality, clarity, and display than the LCD monitors.
   3. These monitors are flat, thinner and lighter in weight.
   4. The biggest advantage of LED display is its efficient and low energy consumption, which is especially needed for handled and chargeable devices, such as mobile phones, tablets, and laptops.
   5. These monitors are in maximum use nowadays.

Question 8

Discuss the various types of memory sticks.

Answer

The various types of memory sticks are:

1. Memory Stick PRO — It was introduced in 2003 as a joint effort of Sony and SanDisk. It is available in storage sizes up to 2 GB.
2. Memory Stick Duo and Memory Stick PRO Duo — These are basically smaller versions of the Memory stick and Memory stick Pro. Memory stick Duo was replaced by Memory Stick Pro Duo due to its increased size limitation and slow transfer speed. With faster data transfer speed and high capacity flash memory, a Memory Stick Pro Duo card perfectly meets the requirements of a portable digital device.
3. Magic Gate — It is a copy protection technology introduced by Sony in 1999. It is a form of DRM (Digital Rights Management) that allows for protected content to be transferred to and from a memory card and utilized on a device, such as an MP3 player or cellular phone. It encrypts the data stored on a card and enforces control over how files are copied. It is typically used for audio and video but can also be used for contents in other formats.

Question 9

Differentiate between Flatbed Plotter and Drum Plotter.

Answer

Question 10

Explain the various types of keys of a keyboard.

Answer

The various types of keys of a keyboard are:

1. Typing Keys — These keys include letters (Alphabet keys), numbers (Number keys), punctuation (. , : ; ' ") and Special Symbol (+ - - $ keys) etc. These keys also include the Shift, Caps Lock, Spacebar, Backspace, and the Tab keys.
2. Control Keys — These keys are either used alone or in combination with other keys to perform an action. Ctrl, Alt, Windows logo key, and the Esc key are various examples of Control keys.
3. Navigation Keys — They are used for moving through documents or web pages and sometimes for editing the text. These keys include the Arrow keys, HOME, END, PgUp, PgDn, DELETE, and INSERT keys.
4. Function Keys — They are used to perform specific tasks. They are placed on the top row of the keyboard and are labelled as F1, ..., F12. These keys have different functions in different programs.
5. Numeric Keypad — The numeric keypad consists of number keys from 0 to 9, the arithmetic operators and the decimal point. It is placed on the right side of a keyboard and is used for entering numbers at a faster pace.

Question 11

Discuss the features and applications of web cam.

Answer

A webcam is the short form of the web camera. It is a device primarily used to share a live image in real time to or through a computer in a network.

A webcam is connected to the computer by a USB cable or built into computer hardware, such as laptops. When sent to a remote location, the videos can be recorded, viewed, saved on the hard drive or live-streamed over the internet.

A webcam is widely used in organizations for video conferencing. They can also be used for video telephony, live streaming, social media, security, video surveillance etc.