BVSS 2020 P1

2 1 Computer parts can be organised into roles. Match each role to its description. Role Description Address bus • • Intermediate or final results produced by the computer; usually in the form of processed data. Memory • • Processes data and follows instructions; consists of an arithmetic logic unit and a control unit. Output • • Stores data, instructions and the results of processing for immediate use. Processor • • Stores large amounts of data that will not be lost when power supply is interrupted. Secondary storage • • Transports data between memory and processor; bi-directional. • Transports required memory location from processor to memory; uni-directional. [5] 2 (a) Name one type of external storage. ............................................................................................................ [1]

3 (b) Describe one advantage and one disadvantage of using the type of external storage in Part (a). Advantage: …………………………………………………………………… ………………………………………………………………………………..... ………………………………………………………………………………..... Disadvantage: ……………………………………………………………...... ………………………………………………………………………………..... ………………………………………………………………………………..... [2] 3 A meteorologist wants to determine the date of the day with the lowest amount of rainfall in a certain month for a particular year. State the input, output and process needed to solve the problem. Assume that there are 30 days in that month. Input: ………………………………………………………………………………...... ………………………………………………………………………………………..... ………………………………………………………………………………………..... Output: ………………………………………………………………………………… ………………………………………………………………………………………..... ………………………………………………………………………………………..... Process: ………………………………………………………………………………. ………………………………………………………………………………………..... ………………………………………………………………………………………..... ………………………………………………………………………………………..... ………………………………………………………………………………………..... [5]

4 4 Fill in the blanks using the words provided. algorithm decomposition flowchart generalisation incremental modular pattern recognition Problem solving techniques are essential in simplifying complex problems. The first technique involves breaking down a complex problem into sub- problems. This is called ........................................ For this, there are two approaches. The ........................................ approach involves deriving a solution to a smaller version of the problem then extending the solution to larger versions of the problem. The ........................................ approach involves separating tasks into distinct sub-problems. The second technique involves identifying similarities among items. This is called ........................................ The third technique involves replacing similar problems with a single problem. This is called ......................................... [5]

5 5 Predict the expected output