Revision

Question 1

What is a CPU

Answer 1

A CPU is the processor of the computer. It contains millions upon millions of transistors. It executes a lot of the instructions is told to do

Question 2

What is the fetch-decode and execute cycle

Answer 2

The fetch cycle takes the address required from memory, stores it in the instruction register, and moves the program counter on one so that it points at the next instruction

The control unit checks the instruction in the instruction register. The instruction is decoded to determine the action that needs to be carried out

The actual actions that happen during the execution cycle depend on the instruction itself

Question 3

What is a register

Answer 3

A register is a fast access temporary data store

Question 4

Storage types

Answer 4

RAM
ROM
Flash memory
RAM cache memory
Data capicity

Question 5

Flash drive storage

Answer 5

2 GB - 64 GB

Question 6

External Hard Drive

Answer 6

Has a capacity of 5000 MB - 4 TB

Question 7

CD/ DVD/blu-ray disk storage

Answer 7

650 MB(CD storage) 9 GB (DVD) and 50GB(blu-ray)

Question 8

Magnetic tape storage

Answer 8

200 GB - 400 GB

Question 9

LAN network

Answer 9

It is a network, LAN is shortened for Local Area Network. The computer systems are located relatively close to each other. An example could be that the systems are in the same building

Question 10

WAN network

Answer 10

WAN is shortened for Wide Area Network. The computer Systems are located a fair distance away from each other. An example of a WAN is separate computer systems in buildings all over the country or in other countries

Question 11

Algorithms

Answer 11

Algorithms are sets of instructions that can be used to solve a given problem. In order for the algorithm to work the instructions must be clear and in the correct order to produce the solution

Question 12

For loops

Answer 12

Loops that you can set to how many times you want it to repeat something “for i in range (…)”

Question 13

While loops

Answer 13

Loops that can go on forever unless it is broken

Question 14

Variable scope

Answer 14

When a value belongs in a certain variable. An example could be
j=0

while j<10:
       for i in range(10):
             print("value",i, "is:", i+1)
             j = j+1
print()
print("However, the last i was:",i)

In this program j belongs to while loops. i belongs to for loop

Question 15

IDE’s

Answer 15

IDE’s are within a program. It can debug code and also be a text editor. An IDE is python and Java is that it highlights the important parts of the program e.g it highlights the function print