Digital Data

Question 1

0110 1011 1101 into HEX

Answer 1

8421 8421 8421
0110 1011 1101
6 B D
#6BD

Question 2

Convert Decimal Hex 69.A into Binary

Answer 2

6 9 .A
0110 1001 .1010

01101001.1010

Question 3

What are the Limitation of Parity Checking

Answer 3

• If an error occurs in one-bit parity checking will alert you to the presence of a mistake but will not show where the error is
• If 2 bits are corrupt, they cancel each other out so error can’t be found

Question 4

1492 into Binary

Answer 4

10111010100

Start from 1, times each by 2

Question 5

How do you do Two’s Complement?

Answer 5

Use 1’s complement on binary value (flip values) then add one until 1 replaces a 0

Question 6

0001 1100 0101 + 0001 0110 0110

Answer 6

0011 0010 1011

Question 7

0100 (3) - 1011 (4)

Answer 7

0011
+ 1100 (used twos complement)
1111 (need negative number so use twos-complement on this)

0001 (-1 as leftmost bit is ‘0’)

Question 8

Show 123.45 as Float Point Representation

Answer 8

0.12345 x 10^3

• 10 as the decimal number has a 10 base
• 3 is how many times you have to move the numbers to have none in front of point

Basically same for binary but 2 base

Question 9

What are the 6 Logic Gates we need to know

Answer 9

AND, NAND, OR, NOT, NOR, XOR (You know what these do)