1.)One advantage of using magnetic tape
It is very cheap
2.)One advantage of using magnetic tape
Very large storage capacity
3.)One disadvantage of using magnetic tape
Very slow access speeds
4.)One disadvantage of using magnetic tape
it can be corrupted if it is placed near a strong magnet
5.) Give one advantage of using optical discs
Optical discs have a low cost per Gb
6.)Give one advantage of using optical discs
They are highly portable and durable
7.)Give one disadvantage of using optical discs
They are very slow to write to( slow access times)
8.)Give one disadvantage of using optical discs
They require an optical drive to be read/written
9.) What is the definition of clock speed?
The number of instructions a CPU core can carry out per second
10.)Explain why using a CPU with a large cache capacity may increase CPU performance
-Cache memory is a lot faster than ram. - It increases the amount of data that can be stored in quick access memory.
11.) What does the Accumulator do?
Stores the result of calculations done by the CPU
12.) What does the MAR do?
It holds the memory address about to be used by the CPU
13.)What does the MDR do?
The MDR holds the data or instructions that have been fetched from/ written to memory
14.)Explain what happens in the fetch part of the CPU
- The memory address from the program counter is copied to the MAR.-The fetches instructions are copied to the MDR.
15.) Explain what happens in the decode part of the CPU
- 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.) Explain what happens in the execute part of the CPU
- The decoded instruction is carried out/ executed - The cycle is then repeated
17.) What are two benefits to using a lan?
- Can access files from any computer- Can share files/work colaboratively on same files.
18.) Descrive how sampling is used when storing sound
-The height/ampliturde of the sound wave is measured at regular intervals/- This is then converted to binary
19.) Explain why data is stored in computers in a binary format.
-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.) What are two functions of the operating system?
- Manages memory- Provides interfaces between the user and computer.
21.) Describe what is meant by open source software?
- 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.)What is meant by a database?
-A structured/organised store of data- Allows data to be quired/intergrated.
23.)What data type is best for HTML
- Define content- Layout of web pages/links
24.)What data type is best for JPG
Images/ photos
25.)What data type is best for MP3
SoundAudioMusic files
26.)What file type is best for PDF
Documents such as word