IGCSE Unit 3

Multiple Choice

What is this a picture of?

• a Mouse

• a keyboard

• a printer

• Nick?

Multiple Choice

What is this a picture of?

• PC Monitor

• Keyboard

• Touchscreen

• 3D Printer

Multiple Choice

What is this a picture of?

• mouse

• game controller

• microphone

• a keyboard

Multiple Choice

Was ist das?

• A touchscreen

• A computer

• A game controller

• Louis's ipad under the desk

Open Ended

What do mouse, keyboard, touchscreen, and game controller have in common?

Multiple Choice

What is the primary function of an optical mouse?

• Used as a pointing device

• Used for printing documents

• Used for playing music

• Used for storing data

Multiple Choice

How can a keyboard be connected to a computer?

• Using a HDMI cable

• Using a universal serial bus port or wirelessly via Bluetooth

• Using a VGA cable

• Using an Ethernet cable

Multiple Choice

What is one of the uses of a keyboard?

• To give data and instruction to the computer

• To project videos

• To amplify sound

• To charge the computer

Multiple Choice

What is a common feature of all touch screens?

• They emit light

• They react to touch

• They produce sound

• They generate electricity

Multiple Choice

Which layer in a capacitive touch screen is responsible for conducting electricity?

• Protective layer

• Conductive layer

• Glass substrate

• Plastic layer

Multiple Choice

What changes when a finger touches a capacitive touch screen?

• The screen's color

• The electrostatic field

• The screen's temperature

• The screen's brightness

Multiple Choice

What is an advantage of resistive touch screens?

• High touch sensitivity

• Can be used with bare fingers, stylus, and gloved hand

• Supports multitouch

• Faster response time

Multiple Choice

What is a disadvantage of resistive touch screens?

• High power consumption

• Low touch sensitivity, No multitouch

• Expensive to produce

• Limited color display

Multiple Choice

What is the primary function of the processor in a resistive touch screen?

• To emit sound

• To react to pressure and display the required item

• To change screen color

• To increase brightness

Multiple Choice

What is the result of a voltage change in a resistive touch screen?

• The screen becomes brighter

• The coordinates of the pressure change are calculated

• The screen emits sound

• The screen changes color

Multiple Choice

What do infrared touch screens emit underneath the top surface layer?

• A constant grid of lights

• A layer of sound waves

• A sheet of glass

• A network of wires

Multiple Choice

What is translated into coordinates in an infrared touch screen?

• The light grid

• The disturbance

• The screen resolution

• The color pattern

Multiple Choice

What causes a disturbance in the infrared touch screen technology?

• A change in temperature

• A touch on the screen

• A loud noise

• A magnetic field

Multiple Choice

What happens when the light grid is interrupted in infrared touch screens?

• The screen turns off

• A disturbance is caused

• The screen changes color

• The sound is muted

Multiple Choice

What is a common issue with infrared touch screens?

• High energy consumption

• False touch susceptibility

• Slow processing speed

• Limited screen size

Multiple Choice

What does the processor do with the disturbance in infrared touch screens?

• Ignores it

• Translates it into coordinates

• Amplifies it

• Converts it into sound

Multiple Choice

What technology do 2D scanners use at airports to read passports?

• RFID

• OCR

• GPS

• Bluetooth

Multiple Choice

What is the purpose of computed tomographic (CT) scanners?

• To create 2D images of documents

• To produce sound waves

• To create 3D images of solid objects

• To enhance color in photographs

Multiple Choice

Where is the price of a product stored if not in the barcode?

• On the product label

• In a database

• In the barcode

• On the receipt

Multiple Choice

What type of light does a barcode reader use to read the bars in the code?

• Infra-red light

• Ultraviolet light

• Visible light

• X-ray light

Multiple Choice

What is the final form of the data after the barcode is scanned?

• Analog data

• Digital data

• Visual data

• Audio data

Multiple Choice

What does OCR stand for in the context of document processing?

• Optical Character Recognition

• Optical Code Reader

• Optical Content Retrieval

• Optical Character Reproduction

Multiple Choice

What do 3D scanners use to build up a 3D model of a scanned object?

• Reflected laser light

• Infrared light

• Ultraviolet light

• X-rays

Multiple Choice

In how many dimensions do 3D scanners work?

• One

• Two

• Three

• Four

Multiple Choice

What is the primary function of OCR software in 2D scanners?

• To enhance image quality

• To convert text into audio

• To review images and select text

• To translate text into different languages

Multiple Choice

How do CT scanners create a 3D image of a solid object?

• By using a single 2D image

• By stacking multiple 2D slices

• By rotating the object

• By using holographic technology

Multiple Choice

What is the role of charge couple devices (CCD) in image capturing?

• Convert light into electricity

• Store digital images

• Enhance image resolution

• Adjust camera focus

Multiple Choice

What are the tiny components that make up an image called?

• Pixels

• Diodes

• Sensors

• Arrays

Multiple Choice

What is a common use of microphones in computers?

• For printing documents

• For video-conferencing with webcams

• For scanning images

• For playing video games

Multiple Choice

What does a higher number of pixels on a monitor indicate?

• Better quality of picture output

• Larger screen size

• Lower cost

• Faster refresh rate

Multiple Choice

What is a common characteristic of larger monitors?

• They are less expensive

• They have fewer pixels

• They tend to be more expensive

• They have lower resolution

Multiple Choice

What are LCD screens made up of?

• Tiny liquid crystals

• Tiny light-emitting diodes

• Tiny light crystals

• Tiny liquid diodes

Multiple Choice

How do LCD screens produce light?

• They are back-lit using LED technology

• They emit light directly

• They use fluorescent bulbs

• They use plasma technology

Multiple Choice

What does OLED stand for?

• Organic Light Emitting Diode

• Organic Liquid Emitting Diode

• Organic Liquid Emitting Display

• Organic Light Emitting Display

Multiple Choice

How are DLP projectors connected to a computer?

• Via Bluetooth

• With a USB cable

• With a HDMI connector

• With a VGA cable

Multiple Choice

What is a key difference between an LCD projector and a DLP projector?

• LCD projectors use a single prism for all colors.

• LCD projectors use three prisms for red, green, and blue lights.

• LCD projectors do not use prisms at all.

• LCD projectors use prisms only for red light.

Multiple Choice

How do LCD projectors produce images?

• By using a single light source.

• By converging light through a second prism.

• By reflecting light off a mirror.

• By using no prisms at all.

Multiple Choice

What is one advantage of using a laser printer?

• Slow printing speed

• High noise levels

• Good quality results

• Expensive maintenance

Multiple Choice

Why are laser printers popular choices for workplaces?

• High cost

• Low noise levels

• Limited connectivity

• Large size

Multiple Choice

How does an inkjet printer connect to a computer?

• Using a parallel port

• Using a universal serial bus interface or wirelessly

• Using a coaxial cable

• Using a fiber optic cable

Multiple Choice

What materials do 3D printers often use?

• Wood and glass

• Plastic and metal

• Paper and ink

• Fabric and thread

Multiple Choice

What is the function of the Address Bus?

• Carries data between CPU and memory

• Carries addresses between memory unit and CPU

• Carries signals from control unit to components

• None of the above.

Multiple Choice

Which bus carries data between the memory unit and CPU, and to and from input/output devices?

• Address Bus

• Data Bus

• Control Bus

• None of the above

Multiple Choice

The Control Bus is responsible for carrying signals from the control unit to all other computer components. True or False?

• True

• False

Multiple Choice

Which of the following is NOT a type of system bus?

• Address Bus

• Data Bus

• Control Bus

• Memory Bus

Multiple Choice

Which register stores the current instruction being decoded and executed?

• Accumulator

• Current Instruction Register

• Memory Address Register

• Program Counter

Multiple Choice

The Accumulator is used when carrying out ALU calculations; it stores data temporarily during the calculations. True or False?

• True

• False

Multiple Choice

Fill in the blank: The Memory Address Register (MAR) stores the address of the memory location currently being read from or written to.

• Data

• Instruction

• Address

• Program

Multiple Choice

Which register stores data that has just been read from memory or data which is about to be written to memory?

• Memory Data Register

• Program Counter

• Accumulator

• Current Instruction Register

Multiple Choice

The Program Counter stores the address where the next instruction to be read can be found. True or False?

• True

• False

Open Ended

Write the 6 Correct answers:

1. 1.

2. 2.

3. 3.

4. 4.

5. 5.

6. 6.

Draw

a) Put a Tick mark next to each statement thats applies


b) Give the names of two other registers

Multiple Choice

Which type of memory is directly addressable by the CPU?

• Primary Memory

• Secondary Storage

• External Storage

• None of the above

Open Ended

What is this a picture of?

Multiple Choice

What are the two common types of RAM?

• A) DRAM and SRAM

• B) DRAM and ROM

• C) SRAM and ROM

• D) ROM and PROM

Multiple Choice

Which of the following can be both internal and external to the computer?

• A) Primary Memory

• B) Secondary Storage

• C) CPU

• D) ROM

Multiple Choice

Which type of memory stores program executable code and bootup code?

• A) Primary Memory

• B) Secondary Storage

• C) Both

• D) None

Multiple Choice

Fill in the blank: ROM is ______.

• volatile

• non-volatile

• external

• slow

Multiple Choice

Which of the following is an example of primary memory?

• HDD

• SSD

• RAM

• DVD

Multiple Choice

Which statement about RAM is correct?

• It is non-volatile

• It is used for long-term storage

• It is volatile and faster than secondary storage

• It cannot be accessed by the CPU

Multiple Choice

Which type of RAM does not need to be constantly refreshed?

• DRAM

• SRAM

• ROM

• PROM

Multiple Choice

DRAM is ______ expensive than SRAM.

• More

• Less

• Equally

• Not

Multiple Choice

Which type of RAM has a higher memory capacity?

• DRAM

• SRAM

• ROM

• PROM

Multiple Choice

Which statement is true about ROM?

• It is volatile

• It is non-volatile

• It can be written to

• It is temporary.

Multiple Choice

What is the role of the read-write heads in an HDD?

• To increase speed

• To look for correct blocks of data

• To store data

• To delete data

Multiple Choice

What is the effect of fragmentation on HDD performance?

• Improves performance

• No effect

• Gradual deterioration

• Immediate failure

Multiple Choice

Which of the following is a use of removable hard disk drives?

• Transferring files between computers

• Displaying graphics

• Running applications

• Processing data.