Data Representation

Question 1

Types of error checking:

Answer 1

Parity bits, majority voting, checksum, check digits

Question 2

Parity Bits:

Answer 2

Two types, even and odd parity.
Even Parity: An even amount of 1’s per byte if there are no errors.
Odd Parity: An odd amount of 1’s per byte if there are errors.

Question 3

Majority Voting:

Answer 3

Each bit is sent three times, so 1101 would look like 111 111 000 111.
With 100 111 000 010 we’d assume it is:
0100.

Question 4

Checksum:

Answer 4

A piece of data is added to some data, checksum returns a value which is sent with the data.

Question 5

Check Digit:

Answer 5

Extra digit and beginning or end of some data