FAULTY

Question 1

Why do computers only understand the binary system? Why does any form of data need to be converted into binary format so that it is able to be processed by the computer?

Answer 1

• Binary system only consists of 0s and 1s
• Computer contains millions and millions of tiny switches which must either be in OFF or ON position
• Can be represented by binary system - on position can be represented by 1 and off position is represented by 0

Question 2

What is the binary number system?

Answer 2

• Base 2 number system
• Uses only two values - 0 and 1 to represent all values
• Uses headings like 2 to the power of 0, 2 to the power of 1, two to the power of 2, etc.
• Counts in powers of 2

Question 3

What is the denary number system?

Answer 3

• Counts in powers/multiples of 10
• Uses ten values - 0 to 9 to represent all values
• Base ten number system
• Uses headings like 2 to the power of 0, 2 to the power of 1, 2 to the power of 2, 2 to the power of 3, etc.

Question 4

What is the hexadecimal number system?

Answer 4

• Very closely related to binary number system
• Sometimes referred to as simply ‘hex’
• Base 16 system
• Uses 16 ‘digits’ - 0 to 9 and A to F
• Typical headings are - 16 to the power of 0, 16 to the power of 1, 16 to the power of 2, 16 to the power of 3, 16 to the power of 4, etc.

Question 5

What is the full form of ASCII?

Answer 5

American standard code for information interchange

Question 6

What is the difference between the standard ASCII code character set and the extended ASCII?

Answer 6

Standard - consists of 7 bit codes (0 to 127)
extended - uses 8 bit codes (0 to 255)
standard - represents letters, numbers and characters with 23 control codes (0 to 31)
extended - same thing but with characters in non - english alphabets and graphical characters too

Question 7

What is unicode?

Question 8

What are soundwaves?

Question 8

What were the goals of unicode?

Question 9

What is sampling?

Question 10

How does an ADC convert the analogue data to digital?

Question 11

What are sampling rate and sampling resolution?

Question 12

What are the advantages and disadvantages of using a larger sampling resolution?

Question 13

What is color depth?

Question 14

What is image resolution?

Question 15

What are the disadvantages of using a high image resolution? Name one compromise.

Question 16

What is a bit?

Question 17

Name an advantage of using hexadecimal over binary.

Question 18

What are the uses of the hexadecimal system?

Question 19

What are error codes?

Question 20

Compare MAC addresses and IP addresses? What is the format of MAC addresses? What is the full form of IP?

Question 21

Name a few differences between IPv6 and IPv4.

Question 22

Where is HTML used in? What are tags? What does the hexadecimal format signify?

Question 23

How many values of RGB are possible in HTML color codes?

Question 24

Name the table of memory size.

Question 25

What is the file size of an image formula?

Question 26

Name the formula for calculating the file size of a stereo and mono sound file?

Question 27

Why is compression important?

Question 28

When and how do you apply lossy compression?

Question 29

When and how do you apply lossless compression?

Question 30

What is RLE? What is the full form of it?

Question 31

What is a flag in RLE? What is the number used for flag?

Question 32

How to increase the accuracy of sampled sound?