Computer Chapter 1 (qna from book + test copy)

Question 1

What is the job of the CPU

Answer 1

1. The CPU takes in data and instructions from the input devices. It performs calculations or takes decisions based on the instructions it’s given and produces meaningful information. (processing)
2. The CPU also coordinates the activities of the entire computer system (which is why - brain of the computer)

Question 2

Where is the CPU stored on personal computers

Answer 2

It is housed in a single chip called a microprocessor, called an integrated circuit (IC)

Question 2

What is the motherboard

Answer 2

It is the base that the CPU is fixed onto. The motherboard is a large circuit board inside the CPU box.

Question 3

What are the functional units of the CPU

Answer 3

1. Control Unit
2. Arithmetic Logic Unit
3. Primary Memory Unit

Question 4

What are two functions of the Control Unit

Answer 4

1. It controls the flow of data.
2. It controls the order in which computer programs are executed

Question 5

What are two functions of the Arithmetic Logic Unit

Answer 5

1. It performs all arithmetic and logical calculation.
2. It controls all major arithmetic operations

Question 6

What is the Primary Memory divided into

Answer 6

RAM and ROM

Question 7

What are the differences between RAM and ROM (in a table)

Answer 7

RAM:
- temporary memory
- volatile memory
- gets erased when the program is closed
- can be written on/changed
- holds the data and instructions currently in use
ROM:
- permanent memory
- non volatile memory
- contains the instructions of the computer that were stored during its manufacture
- can only be read
- cannot be erased

Question 8

what is the similarity between RAM and ROM

Answer 8

they are both primary memory

Question 9

block diagram of CPU

Answer 9

(Drawing)