Topic Frequency in Cambridge AS 9618 Paper 1 (May–June, 2019–2023)
Topic
Subtopic / Example
Appearances (approx.*
2021–2023 AS P1)
Data
Representation
Binary/hex conversions (two’s complement)
5 (out of 6 papers)
Image and sound encoding (pixels, resolution, bit
3
depth)
Computer
Architecture
System Software
Character encoding (ASCII/Unicode codes)
3
Compression (lossless methods, file headers)
2
CPU registers & fetch-execute cycle
3
Buses (address, data, control)
2
Number of cores / clock speed (performance)
2
Embedded vs general-purpose systems
1
Operating system tasks & utilities
3
IDEs, libraries, compilers/interpreters, debugging
2
tools
Data Management Databases (fields, keys, normalization, DDL/DML) 4
Networking
Algorithms &
Logic
LAN/WAN topologies (star, peer-to-peer, etc.)
4
Internet vs WWW, router functions, IP
addressing (static/dynamic, public/private)
3
Algorithm design/pseudocode & data validation 2
Logic gates & Boolean expressions
3
Assembly/machine code (instruction sets, trace
tables, bitwise ops)
4
Topic
Subtopic / Example
Appearances (approx.*
2021–2023 AS P1)
Security & Ethics
Data security vs privacy, network threats
3
Intellectual property (copyright)
2
Ethical issues (licensing, professional ethics)
2
Cloud computing (benefits/drawbacks)
2
Other Topics
Table: Counts of how often each topic (and subtopic) appeared in past May/June AS 9618
Paper 1 questions (2021–2023). Bold items are broad topic areas. (Counts approximate the
number of exam papers in which that topic appears.)
Key Trends: Across recent years, data representation and computer organization dominate
Paper 1. Cambridge explicitly lists “Data Representation” (binary, multimedia, compression) and
“Communication (networks)” as core content for Paper 1cambridgeinternational.org. In
practice, almost every exam includes questions on binary/hex conversions and image or
character encoding (e.g. colour codes,
ASCII)cambridgeinternational.orgexampaperspractice.co.uk. Networking and Internet basics
(LAN topologies, router vs IP roles, Internet vs WWW) also recur
frequentlyexampaperspractice.co.ukcambridgeinternational.org. Likewise, computer
architecture questions (CPU registers, buses, RAM/ROM, clock speed) appear in many papers.
Lesser-tested but still important areas include databases (normalization, keys, queries) and
system software/IDE topics.
High-Priority Revision Areas: Given these trends, students should focus on data representation
(binary/hex arithmetic, bit-depth and file-size calculations, character codes) and computer
fundamentals (CPU fetch-execute cycle, memory types, OS tasks) – these are almost guaranteed
topicscambridgeinternational.orgexampaperspractice.co.uk. Networking fundamentals
(LAN/WAN, IP addressing, router functions, Internet/WWW distinctions) also merit strong
revision, as they have appeared in multiple past exams. Additionally, ensure familiarity with
logic and algorithms (logic circuits, truth tables, pseudocode or simple data-validation checks)
and database basics (relationships, normalization, SQL/DDL questions). In summary, emphasize
the frequently-tested core topics – binary data, hardware/system basics, and networking – as
these remain highly likely to recurexampaperspractice.co.ukcambridgeinternational.org.