SD+&+D+Representing+Text

media type="custom" key="27898447"


 * Questions (Higher)**

1. Why is it important to have an internationally accepted system like ASCII codes for representing alphanumeric characters?

2. The ACSII codes 0 to 31 are sometimes called the 'control codes' or non-printing' codes because they have no printable character associated with them and they normally provide a 'control' function. Give an example of two of these codes and what their functions would be.

3. What difficulties would occur if every computer manufacturer used their own codes for representing text?

4. What is the difference between ASCII and extended ASCII?

5. What advantage does Unicode have over ASCII?

6. Which type of languages are suited to ASCII code?

7. Give two examples of languages that require Unicode and are not suited to ASCII.

8. List 5 characters which are stored in Unicode.

9. Give one disadvantage of Unicode?

10. Explain how a parity bit is used in error checking.

11. A computer uses even parity to detect errors in data transmission. What would the parity bit be in each of the following examples: (a) 10110011 (b) 00000001 (c) 11111110 (d) 01010101

12. A computer uses odd parity to detect errors in data transmission. State whether or not the following examples have an error: (a) 11000011, parity bit 1 (b) 00000000, parity bit 0 (c) 11111111, parity bit 1 (d) 11000011, parity bit 1 (e) 00011010, parity bit 0


 * Questions (National 5)**

1. What is a character set?

2. The ACSII codes 0 to 31 are sometimes called the 'control codes' or non-printing' codes because they have no printable character associated with them and they normally provide a 'control' function. Give an example of two of these codes and what their functions would be.

3. What difficulties would occur if every computer manufacturer used their own codes for representing text?

4. In ASCII how many bits are used to represent each character?

5. Why is it important to have an internationally accepted system like ASCII codes for representing alphanumeric characters?

6. Which type of languages are suited to ASCII code?

7. What is the difference between ASCII and extended ASCII?