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Computing Section 1 : Theory of computer science > Chapter 1 : Binary systems and hexadecimal > Flashcards

Chapter 1 : Binary systems and hexadecimal Flashcards

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1
Q

What is the use of binary numbers in computer systems?

A

They are required as the switches in a computer system can only be either on or off, 1 or 0. This can also be used to check if something has happened (yes or no)

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2
Q

What does each bit represent in a byte (in denary)

A

128,64,32,16,8,4,2,1

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3
Q

How many bits are in a byte?

A

8

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4
Q

What does KB stand for?

A

Kilobyte

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5
Q

How many bytes are in a KB?

A

2^10

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6
Q

What does MB stand for?

A

Megabyte

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7
Q

How many bytes are in a MB?

A

2^20

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8
Q

What does GB stand for?

A

Gigabyte

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9
Q

How many bytes are in a GB?

A

2^30

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10
Q

What does TB stand for?

A

Terabyte

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11
Q

How many bytes are in a TB?

A

2^40

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12
Q

What does PB stand for?

A

Petabyte

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13
Q

How many bytes are in a PB?

A

2^50

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14
Q

What base is hexadecimal?

A

16

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15
Q

What are the numbers in the hexadecimal number line?

A

0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F

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16
Q

How do you convert binary to hexadecimal?

A

separate the binary digits from the end of the string into groups of 4 and then use each set of binary digits to make a hexadecimal

17
Q

How do you convert hexadecimal to denary?

A

multiply the digits by 16 to the power of there position -1 and add them together

18
Q

What is a memory dump?

A

It is where the contents of part of a computers memory are outputted to a printer or monitor

19
Q

How is hexadecimal used in HTML?

A

It is used to represent colours

20
Q

Why is hexadecimal used in MAC addresses?

A

It is easier to read

21
Q

How is hexadecimal used in web addresses?

A

It is used as a security feature as it is takes longer to type

22
Q

Why is hexadecimal used in assembly code and machine code?

A

It is faster to type than binary and it is easier to troubleshoot

23
Q

What does MAC stand for?

A

Media Access Control

24
Q

What are the two types of MAC address?

A

Universally Administered (UAA) and Locally Administered (LAA)

Computing Section 1 : Theory of computer science (6 decks)

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