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CPU and Memory - OCR

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

What doesn’t affect the performance of the computer

a)

Clock Speed

b)

Number of Cores

c)

The number of instructions in the program

d)

Cache Size

2.

If the processing speed goes from 1GHZ to 4GHZ and the processor is changed from an 8 core to a dual core processor – what is the exact effect on the performance of the computer?

a)

The number of instructions executed per second quadruples

b)

The number of instructions executed per second doubles

c)

The number of instructions executed per second stays the same

d)

The number of instructions executed per second is halved

3.
Which of the following best defines clock speed?
a)
Used to count the number of instructions.
b)
The number of instructions stored in memory.
c)
The number of cycles performed in a second.
d)
Used perform mathematical calculations.
4.
3 GHz means approximately how many instructions per second?
a)
0.3 million instructions
b)
3 million instructions
c)
0.3 billion instructions
d)
3 billion instructions
5.
Increasing the clock speed could mean?
a)
You can store more data in your computer.
b)
You can store more instructions in your computer.
c)
The software can respond faster.
d)
More storage in the cache memory.
6.
Increasing the clock speed could mean?
a)
Allows more instructions to run per second.
b)
You can store more instructions in your computer.
c)
The cache memory will increase as well.
d)
More storage in the cache memory.
7.
A multi-core processor is?
a)
Two or more cache units inside a CPU.
b)
Multiple clock speed CPU
c)
Two or more processors inside a CPU.
d)
Multiple counter systems inside the CPU.
8.
More cores mean?
a)
It will double in speed.
b)
The computer will run twice as fast in a dual core.
c)
The speed of the computer will definitely increase.
d)
Separate cores can work on 2 or more tasks at the same time
9.
Cache for a CPU is?
a)
Temporary data used to store data for websites.
b)
Super fast memory located on main memory.
c)
Super fast memory located in or nearby the processor.
d)
Temporary data used to store data used in apps.
10.
What is a core?
a)
A processing unit in a CPU.
b)
Pixels on a screen.
c)
The centre of an apple.
d)
Data store.
11.
What is clock speed measured in?
a)
Gigahertz
b)
M/s
c)
N/kg
d)
Decibels
12.

How many cycles per second would a processor with a clock speed of 1 GHz carry out?

a)

1 million

b)

1 thousand

c)

1 billion

d)

3 hundred

13.

Volatile memory...

a)

Retains any stored data when there's no power

b)

Loses any stored data when there's no power

14.

Volatile memory...

a)

Retains any stored data when there's no power

b)

Loses any stored data when there's no power

15.

Non-volatile memory...

a)

Retains any stored data when there's no power

b)

Loses any stored data when there's no power

16.

Virtual memory is used to...

a)

Allow a computer to continue to run if the computer runs out of space on it's HDD

b)

Allow a computer to continue to run if the computer runs out of space on it's ROM

c)

Allow a computer to continue to run if the computer runs out of space on it's RAM

17.
What does RAM stand for?
a)
Random All Memory
b)
Read All Memry
c)
Random Access Memory
d)
Read Access Memory
18.
If the RAM is upgraded from 512MB to 4GB, what will be the biggest benefit?
a)
More programs and data can be opened at the same time
b)
The operating system will be faster
c)
There will be more hard drive space
d)
The computer will be quicker if you open a document
19.
RAM is non-volatile memory
a)
True
b)
False
20.

ROM Vs RAM: What is used to boot up the computer when it is switched on...

a)

RAM

b)

ROM

21.

What does non-volatile mean?

a)

Data isn't lost once power is switched off.

b)

Once power is switched off, all data on it is lost.

22.

Why is Virtual Memory needed in a computer system?

a)

It is used as a fast type of memory for programs currently in use to speed up the performance of a computer.

b)

When RAM gets full, instead of closing programs the Operating system uses virtual memory to store some data.

23.

Memory that uses secondary storage so that it seems like an entire program is running from RAM

a)

Cache Memory

b)

Virtual Memory

c)

Flash Memory

d)

Registers

24.
Virtual memory typically uses two storage devices, RAM and ______________.
a)
the hard drive
b)
ROM
c)
a secondary piece of RAM
d)
a CD-ROM
25.

A program stored in virtual memory runs slower than a program stored on the RAM

a)
TRUE
b)
FALSE
26.
Part of the CPU that performs mathematical operations on data e.g. addition, subtraction
a)
Arithmetic Logic Unit (ALU)
b)
Accumulator
c)
Registers
d)
Read Only Memory (ROM)
27.
Component of the CPU that directs operation of the processor
a)
Control Unit (CU)
b)
Graphics Processing Unit (GPU)
c)
Assembler
d)
Interpreter
28.
Small amounts of high-speed memory within the CPU
a)
Registers
b)
BIOS
c)
Program Counter (PC)
d)
Virtual memory
29.
Holds memory addresses for data or instructions about to be used by the CPU
a)
Memory Address Register (MAR)
b)
Random Access Memory (RAM)
c)
Arithmetic Logic Unit (ALU)
d)
Flash memory
30.
Holds the contents found at the address held in the mar, or data which is being transferred to or from memory
a)
Memory Data Register (MDR)
b)
Fetch
c)
Read Only Memory (ROM)
d)
Volatile
31.
Stores results of calculations in the ALU
a)
Accumulator
b)
Embedded system
c)
Random Access Memory (RAM)
d)
Virtual memory
32.

Holds memory address of the next instruction for each cycle

a)
Program Counter (PC)
b)
Accumulator
c)
BIOS
d)
Registers
33.
The next instruction is retrieved by the CPU from memory
a)
Fetch
b)
Cache
c)
Execute
d)
Decode
34.
The instruction is broken down and decoded so computer can execute it
a)
Decode
b)
Encryption
c)
Fetch
d)
Execute
35.
The CPU performs the instruction
a)
Execute
b)
Decode
c)
Compression
d)
Fetch
36.
A computer system built within a digital device e.g. camera, washing machine, car
a)
Embedded system
b)
Central Processing Unit (CPU)
c)
Operating System
d)
ALU
37.
Read/write - function is to load open programs and operating system data currently in use - volatile
a)
Random Access Memory (RAM)
b)
Read Only Memory (ROM)
c)
Cache
d)
Virtual memory
38.
Can only be read, can't be changed, stores essential programs to be run in order to boot the computer - non-volatile
a)
Read Only Memory (ROM)
b)
Flash memory
c)
Random Access Memory (RAM)
d)
Registers
39.
A type memory that stores copies of frequently used data, much faster than RAM, lower capacity - closer to CPU
a)
Cache
b)
Read Only Memory (ROM)
c)
BIOS
d)
Flash memory
40.

The role of the ALU is ...

a)

to carry out calculations

b)

to carry out logic comparisons

c)

to carry out calculations and instructions

d)

to carry out calculations and logic comparisons

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