Input and output devices, CPU


GCSE Computer Science Quiz on Input and output devices, CPU, created by Elizabeth Kelly on 10/09/2016.
Elizabeth Kelly
Quiz by Elizabeth Kelly, updated more than 1 year ago
Elizabeth Kelly
Created by Elizabeth Kelly about 7 years ago

Resource summary

Question 1

The following devices are examples of input devices: [blank_start]mouse[blank_end], [blank_start]keyboard[blank_end], [blank_start]webcam[blank_end] The following devices are examples of output devices: [blank_start]monitor[blank_end], [blank_start]speaker[blank_end], [blank_start]printer[blank_end]
  • mouse
  • keyboard
  • webcam
  • monitor
  • speaker
  • printer

Question 2

What is the CPU (Central processing Unit) responsible for?
  • Just the output devices
  • All the processing in the computer
  • Keeping the motherboard cool so it can work more efficiently

Question 3

The main parts of the CPU are the [blank_start]Control Unit[blank_end] and the [blank_start]ALU[blank_end] (which stands for [blank_start]Arithmetic and Logic Unit[blank_end].)
  • Control Unit
  • ALU
  • Arithmetic and Logic Unit

Question 4

The CPU processes data by carrying out three steps: [blank_start]fetch[blank_end] (instructions are transferred from the memory to the CPU), [blank_start]decode[blank_end] (the control unit determines what the instructions mean) and [blank_start]execute[blank_end] (the instruction is executed using the ALU for instructions involving logical or mathematical operations.) This whole process is called the [blank_start]fetch-execute cycle[blank_end].
  • fetch
  • execute
  • decode
  • fetch-execute cycle

Question 5

What is the definition for Clock Speed?
  • Represents the number of instructions the CPU can process in a given time - the number of fetch-execute cycles it can perform
  • The amount of time the CPU can run for and perform the fetch-execute cycles
  • How fast the CPU can perform one fetch-execute cycle

Question 6

The clock speed is measured in megahertz (million) and gigahertz (billion) and the higher the clock speed, the faster the CPU will run.
  • True
  • False

Question 7

Multiple core processors are processors with [blank_start]more[blank_end] cores than single core processors. If there are [blank_start]more[blank_end] cores, this means that more instructions can be processed at the same time, [blank_start]improving[blank_end] the computers performance. For example, a quad core processor would have a [blank_start]better[blank_end] computer performance than a dual core processor as [blank_start]4[blank_end] instructions can be processed in a [blank_start]shorter[blank_end] time.
  • more
  • less
  • improving
  • not improving
  • better
  • worse
  • shorter
  • longer
  • 4
  • 3
  • 2
  • 1
  • more
  • less

Question 8

What is Cache Memory?
  • High speed memory in the CPU that is used to store a copy of frequently used instructions so they can be accessed more quickly
  • A small section of memory designated to storing specific data that needs protection - for example security data or details
  • Everyday memory that the computer uses in ever fetch-execute cycle

Question 9

[blank_start]Level 1[blank_end] cache is the smallest and closest to the CPU - sometimes it is built into the CPU itself. [blank_start]Level 2[blank_end] cache is usually on a separate chip next to the CPU, is larger but slower in comparison.
  • Level 1
  • Level 2
  • Level 3

Question 10

Why is Cache Memory used?
  • Because the processing speed of the CPU is limited by the speed that data can be supplied by the RAM, which is slower. It is easier to get data from the cache memory as it is closer to the CPU.
  • Because it frees up space inside the rest of the computer.
  • Because the RAM can get easily full with data so it is needed as an 'overflow'
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