Ordinary level 2026 North west regional mock computer science 2

Based on the provided image, here is the extracted data and questions from the examination paper:

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Section 1

a) i) Define the term Operating System and state any two (02) of its functions. (4 Marks)

ii) Computer hardware can be grouped based on their technology, and their method of accessing data. Classify the following storage media by stating their method of accessing data. Copy and complete the table below: (4 Marks)

Memory	Technology Use	Method of accessing data
Magnetic tape
Flash drive
Solid state drive
CD-RW

b) i) State two examples of an application software that needs to be installed in a computer to: (4 Marks)

• Enable a learner work with data that requires calculation

• Design graduation certificates.

ii) With the aid of a well annotated diagram, explain the machine cycle. (2 Marks)

c) With the coming of technology, most computer users are resolving to use cloud-computing technologies.

i) What is cloud computing? (2 Marks)

ii) State and explain any two (02) services offered by cloud computing. (4 Marks)

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Section 2

2. A teacher intends to write a program to calculate the average between two test marks for a given term. The algorithm will be transformed into a programming language to get the source code and the object code respectively.

a) i) Differentiate between source code and object code. (2 Marks)

ii) What is a program? (2 Marks)

b) The pseudocode to implement the solution is given below:

1. Start

2. Var T1, T2, Avg

3. Enter the test one-mark T1

4. Enter the test two-mark T2

5. Calculate the average $Avg = (T1 + T2) / 2$

6. If Avg is greater than or equal to 10?

7. Display “Passed”

8. Else

9. Display “Failed”

10. Output “Goodbye”

11. Stop

i) How many variables are in the above algorithm? Name them. (3 Marks)

ii) What is a variable? (2 Marks)

iii) What is a datatype? (2 Marks)

iv) Which datatype is suitable for the variables mentioned in (i) above? (3 Marks)

v) Represent the above algorithm using a flow chart. (6 Marks)

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Section 3

3. a) i) Sketch the following logic gates, clearly labelling inputs and outputs: XOR, NAND and NOR. (3 Marks)

ii) What is a logic gate? (2 Marks)

iii) What is a pixel? (2 Marks)

b) A black and white image on a screen will require only a single bit to encode each pixel.

• Figure 1 shows a black and white bitmapped image on the screen of a computer.

• Figure 2 shows the memory locations where the image is stored.

• The first byte used for the pixel data is at memory location 187.

• The pixel stores a byte of data row-by-row, starting with row 1:

• Black pixels are encoded with the bit set to 1, while White pixels are encoded with the bit set to 0.