Draw three different symbols used in a data flow diagram (DFD). For each symbol, state its purpose. Symbol 1 Purpose 1 Symbol 2 Purpose 2 Symbol 3 Purpose 3

9626_m24_qp_32

THEORY

2024

Paper 3, Variant 2

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RockICT Sales sells hats to customers direct from its warehouse. It has a centralised ordering system that is linked to the warehouse and accounts systems. When a customer orders a hat, the system: • takes the orders from the customer • checks the stock status with the warehouse • sends messages to the customer advising of the status of the order • sends out a request for payment and processes the payment • requests the shipping of the hat from the warehouse • receives a shipping confirmation and a stock inventory update from the warehouse • sends stock inventory and payment updates to the accounts. Draw a Level 0 (context level) Data Flow Diagram of the system to show the external entities and the data flow between these and the ordering system. The ordering system has been drawn in the centre of this box for you. Ordering System

9626_s18_qp_33

THEORY

2018

Paper 3, Variant 3

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A computer system is used to monitor the level of pollution in the air. Describe how the system would collect, process and display the data.

9626_s23_qp_11

THEORY

2023

Paper 1, Variant 1

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Data flow diagrams (DFD) are drawn when designing a new computer system. Explain the purpose of a DFD. When a new computer system is being designed, the designers draw a level 0 (context-level) DFD before drawing a level 1 DFD. Describe two differences between a level 0 DFD and a level 1 DFD.

9626_s24_qp_32

THEORY

2024

Paper 3, Variant 2

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Jasvinder has just become manager of the ticketing department in an airport. Part of her job is to provide tickets for passengers who have decided to fly at the last minute. She uses computers to produce the tickets. She also has to produce hard copy of the details of every flight, including passenger names, prior to each flight. Evaluate the output devices which Jasvinder might use, including their specific use in this system.

9626_w17_qp_11

THEORY

2017

Paper 1, Variant 1

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Jasvinder has just become manager of the ticketing department in an airport. Part of her job is to provide tickets for passengers who have decided to fly at the last minute. She uses computers to produce the tickets. She also has to produce hard copy of the details of every flight, including passenger names, prior to each flight. Evaluate the output devices which Jasvinder might use, including their specific use in this system.

9626_w17_qp_12

THEORY

2017

Paper 1, Variant 2

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Draw the correct symbol around each of the elements shown in the DFD in . One element, Teacher, has been done for you. Draw the correct symbols on this DFD: Teacher Student Administrator Calculate College Grade Calculate Class Grade Class Grade files Student files

9626_w22_qp_32

THEORY

2022

Paper 3, Variant 2

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System flowcharts are a visual representation of the flow of data in a system. State the use of each of the following symbols in a system flowchart. Draw one other system flowchart symbol and describe how it is used.

9626_w24_qp_33

THEORY

2024

Paper 3, Variant 3

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Data on a CD ROM is regarded as static data. Using another appropriate example, describe the characteristics of static data.

9626_m20_qp_12

THEORY

2020

Paper 1, Variant 2

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On-screen input forms are used by office workers to enter data into computer systems. A well- designed input form will collect good-quality input so that good-quality output can be produced. Explain how a well-designed on-screen input form helps prevent users from making mistakes when entering data.

9626_m22_qp_32

THEORY

2022

Paper 3, Variant 2

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