Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Resit notes > Binary, headecimal signed 2s compliment > Flashcards

Binary, headecimal signed 2s compliment Flashcards

1
Q

Computer technology has all components that recognise only two states. What are they?

A

1 or 0 (binary aka on or off)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Binary code is used inside the computer to do what?

A

.store and manipulate data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a disadvantage of using binary code?

A

Difficult to document outside of the computer system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What can be used to document instead of binary code?

A

Hexadecimal representation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What type of system is binary?

A

Base 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What type of system is hexadecimal?

A

Base 16

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How is one hexadecimal symbol grouped?

A

in four bits (nibble)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Convert 1011 0110 0111 0001 into Denary

A

46705

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Convert 485 into Binary - 16 bits

A

0000000111100101

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Convert 865 into Hexadecimal

A

361

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Convert 1011 0110 0111 0001 into Hexadecimal

A

B671

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Convert AE2 into denary

A

2786

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How many bits in a byte?

A

8 bits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why do we need signed numbers?

A

To see if a binary number is positive or negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How is a signed binary byte structured

A

The first bit is used to represent the + or - sign. 0 is positive and 1 is negative. The remaining bits total up the value. Another name for this is sign and magnitude.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Give a disadvantage of using sign and magnitude method

A

You have a positive and negative 0.

17
Q

How do people normally store signed integers?

A

In 2’s complement

18
Q

State what is meant by one’s complement

A

The binary number obtained by subtracting each digit in a binary number from 1

19
Q

State what is meant by two’s complement

A

The one’s complement of a binary number plus 1

20
Q

Express the number 10100100 in 2’s complement

A

01011100

21
Q

How do you convert a negative denary number into binary Two’s
Complement

A
  1. Find the binary equivalent of the denary number
  2. Add an extra bit before the most significant bit and turn that into 0
  3. Flip all the bits: 0 to 1; 1 to 0
  4. Add 1
22
Q

How do you Converting Two’s Complement to denary

A
  1. Flip all the bits: 0 to 1; 1 to 0
  2. Add 1
  3. Simple conversion from binary to denary
23
Q

Give an example of where 2’s complement can be used

A

Digital displays. This is because you take the lowest negative value, and each successive higher value is obtained by adding 1 to the binary code. When all numbers in the nibble is 1, it rolls over again to all 0 - just like a digital display.

24
Q

State what is meant by binary coded decimal?

A

Another method to grouping bits

25
Q

Why use BCD?

A

If you need an application where single denary digits are required to be stored or transmitted - BCD is used

26
Q

Give examples of BCD being used?

A

Calculator screen or digital time display or the display of currency on a computer

27
Q

If a currency is $300.25, display this in BCD

A

0011 0000 0000 0010 1001

28
Q

Add up 0.26 + 0.85 using BCD

A

0000 0001 0001 0001

29
Q

State what is meant by ASCII

A

It is a coding scheme that allows text to be stored via a character code

30
Q

State the columns of an ASCII table

A

Binary, Hexadecimal, Character, Description

31
Q

How many different codes are available for 7 bit code.

A

27 (128)

32
Q

What characters are contained in an ASCII table

A

Non-printing or control characters - there for data transmission or entering data in a computer terminal (not used much anymore).

Upper and Lower Case letters; Punctuation symbols; Numerals and Arithmetic Symbols

33
Q

What is the problem with ASCII codes

A

Limited amount of characters can be stored not suitable for different languages.

34
Q

State what can be used instead of ASCII code

A

Unicode - the first 128 characters is ASCII and has different lengths

35
Q

How is Unicode structured

A

Uses a CODE POINT instead of character code (ASCII).
e.g.
U+0041 is the letter A where 0041 is hexadecimal.

Where Unicode uses ASCII (the first byte) it starts with 0.

Resit notes (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions