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2019 Review - I, IGCSE CS 0478 - dfm

Total questions: 48

Worksheet time: 26mins

Name
Class
Date
1.

What does ASCII stand for

a)

American Scheme for Colours In the Internet

b)

Any Set of Characters In the Internet

c)

All Set Characters In Information

d)

American Standard Code for Information Interchange

2.

How many bits does ASCII use for 1 letter?

a)

8

b)

10

c)

2

d)

1

3.
7 bit ASCII code can represent 128 characters
a)
True
b)
False
4.
Convert the Hex number DA to binary.
a)
11001010
b)
11011011
c)
11011010
d)
11011110
5.
Convert the Hex number B9 to binary.
a)
10111001
b)
10111000
c)
10111101
d)
10101001
6.
Convert the Hex number 1F to binary.
a)
00111111
b)
00001111
c)
00010111
d)
00011111
7.
Convert the binary number 10101010 to Hex
a)
AA
b)
BB
c)
CC
d)
DD
8.

Convert the binary number 11000011 to Hex

a)

11

b)

A2

c)

C3

d)

D4

9.
Convert the binary number 11010110 to Hex
a)
A3
b)
B4
c)
C5
d)
D6
10.

Which of these are binary digits?

a)

0

b)

1

c)

2

d)

3

11.

Which of these are hexadecimal digits?

a)

F

b)

G

c)

6

d)

0

e)

H

12.

How many different values can be represented using 8 bits?

a)

128

b)

255

c)

256

d)

999

13.

Hexadecimal is used because...

a)

It takes up less space in ROM

b)

It is easier for computers to process

c)

It is easier for people to read

d)

It is quicker to write data in RAM

14.
Convert 11111111 to decimal
a)
255
b)
245
c)
235
d)
225
15.
Convert 00100100 to decimal
a)
26
b)
36
c)
46
d)
56
16.
Convert 00010001 to decimal
a)
17
b)
27
c)
37
d)
47
17.

Secondary storage devices can be grouped into three categories - what are they?

a)

Magnetic, Flash and Optical

b)

Magnetic, Optical and Solid State

c)

Solid State, Flash and Hard Drives

d)

Hard Drives, CDs and USBs

18.

Hard Disk Drives are a type of...

a)

Optical storage device

b)

Magnetic storage device

c)

Solid State memory

d)

Primary memory

19.

CDs, DVDs and Blu-Rays are all types of...

a)

Magnetic storage devices

b)

Optical storage devices

c)

Solid State memory

d)

Primary memory

20.
Magnetic disks are organised into.....
a)
circles and wedges
b)
sectors and tracks
c)
chunks and stretches
d)
disks and docks
21.
A disadvantage of hard drives is
a)
They have moving parts
b)
They are volatile
c)
They don't last long
d)
They are hard to use
22.

Which of these is based on Cloud storage?

a)

Office 365

b)

Windows

c)

Android

d)

USB Drive

23.

Another term for memory is ________.

a)

backup

b)

compression

c)

storage

24.

A computer's internal hard drive is considered a _______ storage

a)

A. primary

b)

B. secondary

c)

C. Offline

d)

D. external

25.

A computer's external hard drive is often considered a _______ storage

a)

A. primary

b)

B. secondary

c)

C. Offline

d)

D. volatile

26.

Which of the following devices can be removed or unplugged from the computer?

a)

A. Primary Storage

b)

B. Secondary Storage

c)

C. Offline Storage

27.

Random Access Memory (RAM) is a considered _________ memory.

a)

A. primary

b)

B. secondary

c)

C. tertiary

d)

D. voltile

28.
Primary storage is the area in a computer in which data is stored for quick access by the ________.
a)
A. RAM
b)
B. ROM
c)
C. CPU
d)
D. CD-ROM
29.

Which of the following is non-volatile?

a)

A. RAM

b)

B. ROM

30.
The main difference between DVDs and CDs is 
a)
Cost 
b)
Durability
c)
Laser wavelength
31.

A Solid State Drives uses

a)

Non Volatile Flash Memory

b)

Volatile Flash Memory

c)

Volatile Storage Memory

d)

Non Volatile Magnetic Memory

32.
Same as 1,024 GB
a)
1 TB
b)
1 GB
c)
1MB
d)
1 KB
33.
Stores instructions for the computer to start up
a)
RAM
b)
ROM
34.

These are offline storage?

a)

True

b)

False

35.

What type of storage is this device?

a)

Primary

b)

Secondary

c)

Offline

36.

Which type of storage is great for storing backups safely?

a)

Primary

b)

Secondary

c)

Offline

37.

What is the output of an AND gate if its inputs are 1 and 1?

a)

1

b)

0

38.

What is the output of an AND gate if its inputs are 1 and 0?

a)

1

b)

0

39.

What is the output of an OR gate if its inputs are 0 and 1?

a)

1

b)

0

40.

What is the output of an OR gate if its inputs are 0 and 0?

a)

1

b)

0

41.

Which logic gate does this symbol represent?

a)

AND

b)

OR

c)

NOT

d)

IF

e)

ELSE

42.

Which logic gate does this symbol represent?

a)

AND

b)

OR

c)

NOT

d)

IF

e)

ELSE

43.

What is the output Y of this logic cricuit if A = 1, B = 1, and C = 1

a)

0

b)

1

44.

What is the function of a NOT gate?

a)

Inverts its input

b)

Outputs 1 if both inputs are 1

c)

Prevents errors

d)

Outputs 0 if both inputs are 0

45.

What is the output Z of this logic cricuit if A = 1 and B = 1

a)

0

b)

1

46.
What gate is this table for?
a)
AND
b)
OR
c)
NOT
d)
NOR
47.
What gate is this table for?
a)
AND
b)
XOR
c)
OR 
d)
NOT
48.
Which logic gate is this?
a)
XOR
b)
NOR
c)
NAND
d)
NOT

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