Year 10 Computer Science Mock

?
  • Created by: Oscar11
  • Created on: 06-05-17 08:52
What is the MAR and what does it do?
The Memory Address Register holds any memory ADDRESS which is about to be used be the CPU.
1 of 33
What is the MDR and what does it do?
The Memory Data Register hold the actual DATA or INSTRUCTION. This may have been fetched from memory or be waiting to be written to memory.
2 of 33
What is a Program Counter and what does it do?
The Program Counter holds the memory ADDRESS of the instruction for each cycle.
3 of 33
What is the accumulator and what does it do?
The accumulator stores the intermediate results of the calculations in the ALU.
4 of 33
What does the Arithmetic Logic Unit (ALU) do?
-All calculations -Simple addition/subtraction/number comparing -AND/OR/NOT operations -Contains the accumulator register.
5 of 33
What does the Control Unit (CU) do?
-It is in overall control of the CPU -Runs the Fetch/Decode/Execute cycles -Controls to flow of data inside and outside of the CPU.
6 of 33
What is Cache?
Cache is very fast memory in the CPU. It is regularly used data and it will not fetch from RAM.
7 of 33
What are the levels of cache?
L1(fastest/smallest) L2(the middle one) L3(slowest/biggest)
8 of 33
What happens in fetch?
Copy of memory address goes from the PC to the MAR. Copied to the MDR. The PC increments for the next cycle.
9 of 33
What happen in decode?
The CU decodes the data.
10 of 33
What happens in execute?
The instruction is performed.
11 of 33
What is RAM?
Random Access Memory - Can be changed.
12 of 33
What is ROM?
Read Only Memory - Cannot be changed (bootstrap)
13 of 33
What is a Network Interface Controller (NIC)?
An NIC is an internal piece of hardware which allows a device to connect to a network.
14 of 33
What is a switch?
Switches connect a device to a LAN.
15 of 33
What are the different computer protocols?
TCP/IP - HTTP - HTTPS - FTP - POP - IMAP - SMTP
16 of 33
What is TCP/IP?
Transmission Control Protocol / Internet Protocol - The basic communication with a network / the internet.
17 of 33
What is HTTP?
Hyper Text Transfer Protocol - Used by web browsers to access website a communicate with web servers.
18 of 33
What is HTTPS?
A more secure version of HTTP. It encrypts all information sent and received.
19 of 33
What is FTP?
File Transfer Protocol - Used to access, edit and move files between devices on a network, e.g. to access files on a server from a client computer.
20 of 33
What is POP?
Post Office Protocol - Used to retrieve emails from a server. The server holds the email until you actually download it, at which point it is deleted from the server.
21 of 33
What is IMAP?
Internet Message Access Protocol - Used to retrieve emails from a server. The server holds the email until you actually delete it, at which point it is deleted from the server. It is used by most web-based email clients.
22 of 33
What is SMTP?
Simple Mail Transfer Protocol - Used to send emails. Also used to transfer email between servers.
23 of 33
What are the four network protocol layers?
1 2 3 4
24 of 33
What do the layers do?
1=Data link layer 2=Network layer 3=Transport layer 4=Application layer
25 of 33
What are the main functions of an operation system?
User Interface - Memory Management/Multitasking - Peripheral Management - User Management - File Management.
26 of 33
How does a peer-to-peer network work?
All devices are equal, connecting directly to each other without a server.
27 of 33
What is the Data Protection Act 1998?
It gives rights to data subjects. You are allowed to request information about yourself from certain companies.
28 of 33
What is the Computer Misuse Act 1990?
It introduce three new offences: Gaining unauthorised access through hacking, gaining unauthorised access to commit a crime (stealing data / destroying the network) and unauthorised modification of computer material.
29 of 33
What is the Copyright, Designs and Patents Act 1988?
It protects intellectual property.
30 of 33
What is the Creative Commons Licence (CC)?
Allow you to legally share media and software online without having to ask for permission. Intellectual property owners use a CC when they want other people to share / build upon their work.
31 of 33
What is the Freedom of Information Act 2000?
It allows members of the publuc to access the information held by an organisation about that organisation's activities.
32 of 33
What is virtual memory?
An area of secondary storage used by the OS as extra RAM.
33 of 33

Other cards in this set

Card 2

Front

What is the MDR and what does it do?

Back

The Memory Data Register hold the actual DATA or INSTRUCTION. This may have been fetched from memory or be waiting to be written to memory.

Card 3

Front

What is a Program Counter and what does it do?

Back

Preview of the front of card 3

Card 4

Front

What is the accumulator and what does it do?

Back

Preview of the front of card 4

Card 5

Front

What does the Arithmetic Logic Unit (ALU) do?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Computing resources:

See all Computing resources »See all Computer systems resources »