1.1 Binary and Hex Flashcards
1
Q
Why do computers use binary to represent all forms of data?
A
- Any form of data needs to be converted to binary to be processed by a computer
- Data is processed using logic gates and stored in registers
2
Q
Explain the difference between the binary and denary number systems
A
- Binary base 2 system
- Denary base 10 system
- Binary has 2 digits (0 and 1)
- Denary has 10 digits (0-9)
- Binary place values are powers of 2
- Denary place values are powers of 10
3
Q
What are the binary place values for a byte?
A
128 64 32 16 8 4 2 1
4
Q
Convert the binary number 10011011 into denary
A
155
5
Q
Convert the denary value 156 into binary
A
10011100
6
Q
What is the largest value that can be stored in 8 bits?
A
255
7
Q
What is the largest value that can be stored in 10 bits?
A
1023
8
Q
What would be the effect of shifting the bits 1 place to the left for the binary value 0001 1101
A
- Multiplying by 2
- 0001 1101 = 29
- 00111010 = 58
9
Q
What would be the effect of shifting bits 3 places to the left?
A
- multiply by 8 or multiply by 2 x 2 x 2 or multiply by 2^3
- 0000 0110 = 6
- 0011 0000 = 48
10
Q
What would be the effect of shifting bits 2 places to the right?
A
- divide by 4 or divide by 2^2
- 0001 0000 = 16
- 0000 0100 = 4
11
Q
How many bits in a byte?
A
8
12
Q
How many bits in a nibble?
A
4
13
Q
How many nibbles in 4 bytes?
A
8
14
Q
What is a register?
A
- A register is a small amount of internal memory
- Used for fast reading and writing
- It is temporary/volatile (loses data once there is no power)
15
Q
What is hexadecimal?
A
- Base 16 number system
- 16 choices of digits (0-9, A-F)
- Place values are powers of 16
