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Computer Science 1.2

Total questions: 39

Worksheet time: 28mins

Name
Class
Date
1.

... cannot be changed by a program or user. It is used to store instructions for the computer to start up when it is turned on. It also stores the BIOS. NON-VOLATILE.

a)

RAM

b)

ROM

c)

BIOS

2.

... temporary memory in which all programs, applications and data are stored, when they are being used. If the computer is turned off, all the data is lost. VOLATILE.

a)

RAM

b)

ROM

c)

BIOS

3.

... runs as part of the start up system, and loads the operating system. It performs a variety of self-diagnostic tests on the hardware, checks for any hardware attached to the computer and provides a basic user interface where some settings can be changed.

a)

RAM

b)

ROM

c)

BIOS

4.

What does ROM stand for?

(a)  

5.

What does RAM stand for?

(a)  

6.

What does BIOS stand for?

(a)  

7.

Virtual memory is used when ... is full. It is part of the secondary storage used as temporary ... . Data can be moved back and forth between ... and virtual memory. Swapping or paging is a process used by the OS to transfer data between the ... and virtual memory.

(a)  

8.

Select the disadvantages of virtual memory

a)

slower than the RAM

b)

often the OS has has to switch data between virtual memory and RAM

c)

moving data between virtual memory and RAM takes time

d)

the virtual memory is really far away

9.

Select all the different types of secondary storage

a)

optical

b)

tupperware

c)

magnetic

d)

solid state

10.

Select all the types of optical storage

a)

DVD

b)

camera

c)

CD

d)

DCD

11.

Select all the types of magnetic storage

a)

magnetic hard disk

b)

floppy disks

c)

fridge magnets

d)

magnetic tape

12.

Select all the types of solid state storage

a)

flash memory

b)

SD cards

c)

CD cards

d)

memory cards (camera)

13.

... is the number of pixels used to represent an image, the quality of the image improves with higher ... , but so does the file size.

a)

colour depth

b)

resolution

c)

file size

d)

pixels

14.

... the number of bits used to represent a colour in an image, the quality of the image improves with larger ... , but so does the file size.

a)

colour depth

b)

resolution

c)

file size

d)

pixel

15.

image file size = ... x image height x image width

(a)  

16.

image ... = colour depth x image height x image width

(a)  

17.

... is data about data.

(a)  

18.

... is the use of algorithms to reduce file size, this makes them quicker to upload/download/transfer over the internet.

a)

lossy compression

b)

lossless compression

c)

file compression

d)

file squashing

19.

... reduces the file size by permanently deleting certain (particularly redundant) information, the quality can be affected. Generally used for images and sound.

a)

lossy compression

b)

lossless compression

c)

file compression

d)

file squashing

20.

... reduces file size by grouping repeated information together, this is called run length, all the original data remains. Generally used for text documents and spreadsheets.

a)

lossy compression

b)

lossless compression

c)

file compression

d)

file squashing

21.

Convert 26 into 8-bit binary

(a)  

22.

What is 1010 0111 in hexadecimal

a)

A7

b)

107

c)

167

d)

B6

23.

Convert B5 into binary

(a)  

24.

What is 10110011 in denary?

a)

179

b)

180

c)

176

d)

B3

25.

How many bits in a nibble?

a)

1

b)

2

c)

4

d)

8

26.

How many bytes in a megabyte

(a)  

27.

A kilobyte is how many bytes?

(a)  

28.

When doing binary addition, and the answer contains too many bits to be stored properly, it is called....

a)

overflow error

b)

too many bits

c)

the computer crashes

d)

underflow error

29.

In a binary shift, if the number is moved 2 places to the left, the number is multiplied by ...

(a)  

30.

In a binary shift, if the number is moved to the right the number is...

a)

multiplied by 2

b)

divided by 2

c)

divided by 10

d)

subtracted from itself

31.

Binary addition 0011 + 0101 = ?

(a)  

32.

a ... is the characters and symbols a computer can use, understand and display

(a)  

33.

How many bits does ASCII use?

a)

7

b)

8

c)

16

d)

up to 32

34.

How many bits does extended ASCII use?

a)

7

b)

8

c)

16

d)

up to 32

35.

How many bits does UNICODE use?

a)

7

b)

8

c)

16

d)

up to 32

36.

Which, out of ASCII, extended ASCII, and UNICODE, takes the longest to transfer?

a)

ASCII

b)

extended ASCII

c)

UNICODE

d)

they all take the same length of time

37.

... is how many samples of the sound are taken per second

(a)  

38.

... is the number of bits used to store each sample

(a)  

39.

... = sample rate x duration (s) x bit depth

a)

sound file size

b)

image file size

c)

file size

d)

sound