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Flashcards in Computing Keywords from Mark scheme Deck (26)
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1
Q

1.)One advantage of using magnetic tape

A

It is very cheap

2
Q

2.)One advantage of using magnetic tape

A

Very large storage capacity

3
Q

3.)One disadvantage of using magnetic tape

A

Very slow access speeds

4
Q

4.)One disadvantage of using magnetic tape

A

it can be corrupted if it is placed near a strong magnet

5
Q

5.) Give one advantage of using optical discs

A

Optical discs have a low cost per Gb

6
Q

6.)Give one advantage of using optical discs

A

They are highly portable and durable

7
Q

7.)Give one disadvantage of using optical discs

A

They are very slow to write to( slow access times)

8
Q

8.)Give one disadvantage of using optical discs

A

They require an optical drive to be read/written

9
Q

9.) What is the definition of clock speed?

A

The number of instructions a CPU core can carry out per second

10
Q

10.)Explain why using a CPU with a large cache capacity may increase CPU performance

A

-Cache memory is a lot faster than ram. - It increases the amount of data that can be stored in quick access memory.

11
Q

11.) What does the Accumulator do?

A

Stores the result of calculations done by the CPU

12
Q

12.) What does the MAR do?

A

It holds the memory address about to be used by the CPU

13
Q

13.)What does the MDR do?

A

The MDR holds the data or instructions that have been fetched from/ written to memory

14
Q

14.)Explain what happens in the fetch part of the CPU

A
  • The memory address from the program counter is copied to the MAR.-The fetches instructions are copied to the MDR.
15
Q

15.) Explain what happens in the decode part of the CPU

A
  • The fetched instruction is decoded by the control unit- A new value may be loaded into the MAR/MDR to prepare for the execute step.
16
Q

16.) Explain what happens in the execute part of the CPU

A
  • The decoded instruction is carried out/ executed - The cycle is then repeated
17
Q

17.) What are two benefits to using a lan?

A
  • Can access files from any computer- Can share files/work colaboratively on same files.
18
Q

18.) Descrive how sampling is used when storing sound

A

-The height/ampliturde of the sound wave is measured at regular intervals/- This is then converted to binary

19
Q

19.) Explain why data is stored in computers in a binary format.

A

-Circuits only need to check for two states/ uses switches.- Electricity flowing or not flow, whether the switch is on or off.- Resulting in more reliable circuits.

20
Q

20.) What are two functions of the operating system?

A
  • Manages memory- Provides interfaces between the user and computer.
21
Q

21.) Describe what is meant by open source software?

A
  • The source code is distrbuted with the software-The customer can modify the source codeThe customer can redistriute the source code( with some liscence)
22
Q

22.)What is meant by a database?

A

-A structured/organised store of data- Allows data to be quired/intergrated.

23
Q

23.)What data type is best for HTML

A
  • Define content- Layout of web pages/links
24
Q

24.)What data type is best for JPG

A

Images/ photos

25
Q

25.)What data type is best for MP3

A

SoundAudioMusic files

26
Q

26.)What file type is best for PDF

A

Documents such as word