Computer Science 9618/12 Oct Nov 2021 | Cambridge AS Level Past Papers With Mark Scheme

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1. Logic gates and circuit design: truth tables, logic circuit for NOT(A AND B) AND C, binary operations including addition and subtraction.

2. Data representation and conversions: binary to denary, binary to hexadecimal, two’s complement, invalid interpretation as Binary Coded Decimal (BCD).

3. Relational database design: normalisation stages, entity-relationship diagram for PLANTSALES database, data dictionary description, Data Definition Language (DDL) and Data Manipulation Language (DML) statements.

4. System software: role of operating system interrupts (hardware vs. software), file management tasks, utility programs improving computer performance.

5. Von Neumann model: fetch-execute cycle with registers (MAR, MDR), instruction execution involving bitwise operations, assembly language instructions for data movement, input/output, arithmetic, conditional/unconditional, and compare operations.

6. Image formats and compression: vector graphic vs. bitmap differences, lossy compression methods for images, examples from vector logo descriptions.

CIE AS & A Level Computer Science (9618) Nov 2021

Laura Bellini

Classification: Paper 1

Page count: 16

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Last update: 2 months ago

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