9626_m23_qp_12
A paper of Information Technology, 9626
Questions:
10
Year:
2023
Paper:
1
Variant:
2
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1
Data is collected and processed to become information. Many factors affect the quality of the resulting information. Describe what is meant by accurate information. Describe how the use of interviews and questionnaires for collecting data may affect the accuracy of the resulting information. Online processing can be used when goods are purchased. Define what is meant by online processing. Johann has previously registered with an online store. Describe the steps he takes when purchasing goods from the online store.
1. Data processing and information  →  1.5. Data processing
1. Data processing and information  →  1.1. Data and information
Open
4
Mark has a small glasshouse. He lives in a warm country where plants can die if they are left without water for too long. The glasshouse has a microprocessor controlled sprinkler system and a moisture sensor in the soil. Complete this flowchart to show the processing required to control the level of moisture in the soil of the glasshouse. You may assume that a pre-set value, dry, has already been input so that the system can test if the amount of moisture in the soil has reached or fallen below a certain level. The user activates the microprocessor system by pressing a switch. Complete the flowchart which inputs the moisture reading in the glasshouse and switches the sprinkler on and off according to this value. It also checks if the sprinkler is already on or off before attempting to switch it on or off. Start Is the system activated? is mlevel > dry? is sprinkler on? Stop Flowcharts often contain subroutines. Draw the symbol used to represent a subroutine in a flowchart. State what you would expect to see in the first box of a subroutine.
4. Algorithms and flowcharts  →  4.2. Flowcharts
3. Monitoring and control  →  3.2. Control technologies
16. System life cycle  →  16.3. Design
Open