WorksheetsIGCSE Revision Unit 3 Hardware
Total questions: 50
Worksheet time: 37mins
Match the following
Core
Does the processing work
Overclocking
Can lead to overheating
Address/data bus
Can improve performance by increasing its width
system clock
Ensures correct synchronisation
cache memory
Temporary storage space
Which of the following are CPU Registers?
system register
MDR
PC
ALU
data
Random Access Memory (RAM)
Holds data and part of the operating system in use
Control bus
carries and receives signals from all computer components
ALU
carries out maths and boolean operations
PC
contains the next instruction collected from the MAR
CIR
Receives the contents of the MDR and increments the Program counter by one
Reorder the following to show what is happening in the Fetch cycle
PC contains the next instruction
Address copied to the MAR
contents copied to the MDR
contents copied to the CIR
PC increments by one
Which part of the CPU is responsible for ensuring the clock synchronises all computer operations ....? (a)
An embedded system is a (a) of (b) and software designed to carry out a (c) task. Hardware can be electronic, electrical or electro-mechanical. Embedded systems can be based on a (d) ,microprocessor or system on a (e)
Tick all that apply. The benefits of embedded systems are
they need specialists to fault find
they are relatively cheap
can be controlled remotely
small and easy to fit
Which of the following would not improve the performance of the CPU
Increase the hard drive capacity
Increase RAM
increase the width of the address and data bus
use a quad core processor
Which of the following can be embedded systems? Tick all that apply
motor vehicles fuel injection system
Set top box for a television
washing machine
vending machine
Which of the following is not a drawback to an embedded system
They can be hacked quite easily
Devices tend to be thrown away rather than being repaired
They consume very little power
It can be difficult to upgrade to new technology.
What is meant by a von Neumann computer architecture?
Where the program instructions are stored in a seperate memory storage from the data
Where the program instructions are stored in the same memory storage as the data
Where the program instructions are stored in ROM and the data is stored in RAM
Where the program instructions are divided across several CPUs
What are the allowable operations that the processor uses to interact with the RAM?
reading
writing
copying
deleting
Which word describes the property of RAM memory where memory cells must be constantly refreshed to keep their contents
volatile
non-volatile
random
static
What is the non-volatile firmware used to perform hardware initialization during the booting-up process called?
BIOS
Cache
ROM
Hard disk
What type of memory is used to compensate for the difference in speed between accessing processor registers and reading memory locations in RAM?
Cache
Flash
UEFI
BIOS
Name for the small, very fast access storage locations inside the CPU that can store one data item, instruction or address
Cache
Registers
ALU
RAM
What is the correct sequence of operations between CPU and RAM?
Fetch-decode-execute
Fetch-execute-decode
Decode-fetch-execute
Fetch-execute-fetch
The larger the width of the address bus ....
... the larger the size of each memory location
... the faster the data can be transferred
... the more addressable memory locations there are
... the more bits there are in each 'word'
Choose all the secondary storage mediums ...
HDD
SSD
DVD
Cloud
RAM
What type of storage does this device use?
Magnetic
Optical
Electrical
Cloud
Which is the main reason for having cache memory?
To be able to run more powerful programs
To compensate for the difference in speed of the CPU and RAM access times.
To increase the size of main memory
To allow you to run a program with less RAM
What is meant by a von Neumann computer architecture?
Where the program instructions are stored in a seperate memory storage from the data
Where the program instructions are stored in the same memory storage as the data
Where the program instructions are stored in ROM and the data is stored in RAM
Where the program instructions are divided across several CPUs
A register that is built into the ALU that stores the result of any interim calculations.
Accumulator (ACC)
Memory Data Register (MDR)
Central Processing Unit (CPU)
Instruction set.
Which processor speed is the fastest?
16Hz
100MHz
4GHz
300Hz
This would perform an AND operation
Accumulator
Cache
Control Unit
Arithmetic Logic Unit
You can use this to input printed documents to a computer ?
Trackerball
Scanner
Keyboard
Mouse
This sensor is used for burglar alarms
Temperature
Humidity
Movement/Motion
PH
Define the term 'sensor'. Choose the most appropriate definition.
Used to capture and can measure physical quantities
A hardware device that collects data and stores it.
A sensor stores data that it collects
True
False
The device used to input the data from a contactless credit card
Bar code reader
Magnetic stripe reader
RFID reader
Pin Pad
What two input devices could be used with a VR flight training system?
Steering wheel/joystick
Motion sensor
bar code reader
OCR
RFID
Which of the following can not be directly measured by a sensor
Temperature
Light intensity
Heat
Pressure
Which one of the following would you use to produce a digital image of a hard copy photograph?
touchscreen
OCR
Scanner
Barcode reader
Which one of the following cannot be used as an output device?
Actuators
Speaker
touch screen
Microphone
3D printers can be used in the following areas except
Production of prosthetic limbs
precision reconstructive surgery
manufacturing of car bolts, screws and gears
Image recognition
Which of the following devices is primarily used to convert sound waves into digital signals?
Printer
Monitor
Speaker
Microphone
Which device would you use to capture handwritten signatures electronically?
Graphic Tablet
Webcam
Barcode Reader
Speaker
