Four papers, and two of them want opposite things
Live online Cambridge AS and A Level Computer Science 9618 classes across all four papers, including the split most students are unprepared for: Paper 2 does not require program code, and Paper 4 is nothing but.
Syllabus updated August 2026
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Program Overview
Cambridge 9618 examines through four papers of 75 marks each. AS candidates sit Papers 1 and 2; A Level candidates sit all four. The structural fact that catches most students is the relationship between Paper 2 and Paper 4. Paper 2, Fundamental Problem-solving and Programming Skills, states that candidates will not be required to write programming code, and provides an Insert with pseudocode built-in functions. Paper 4, Practical, is programming and nothing else, based around a small number of scenarios, with program code and evidence of testing submitted. The same qualification therefore asks a student to reason about programs without writing them, and then to write nothing but programs. Preparing for one does not prepare for the other, and this course treats them as the two separate disciplines they are.
What Makes This Program Different
Your Learning Journey
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Detailed Course Curriculum
Explore the complete week-by-week breakdown of what you'll learn in this comprehensive program.
Topics Covered
- Binary, denary and hexadecimal, converted quickly in both directions
- Two's complement, binary addition and subtraction, and overflow
- Binary coded decimal and where it is genuinely used
- Character sets, and the size calculations that follow
Topics Covered
- Bitmap and vector images, resolution and colour depth
- Sample rate, bit depth and the file-size calculations examiners set
- Lossy and lossless compression with a defensible reason for each
- The exact wording that earns marks in a comparison question
Topics Covered
- Von Neumann architecture, registers and buses
- The fetch-decode-execute cycle, sequenced and explained precisely
- Interrupts, and how they change the cycle
- Assembly language and addressing modes as the syllabus treats them
Topics Covered
- Devices, and what each is genuinely suited to
- Primary, secondary and offline storage compared
- RAID, and why redundancy is not the same as backup
- First timed set of Paper 1 style questions
Topics Covered
- LAN, WAN, client-server and peer-to-peer
- Hardware, protocols and the layered model
- Bit streaming, and the bandwidth calculations that go with it
- The internet, and what a URL actually resolves to
Topics Covered
- Threats named precisely, and matched to their mitigations
- Encryption, symmetric and asymmetric, with the key exchange explained
- Digital certificates, signatures and SSL as an examined chain
- Validation and verification, distinguished as the syllabus distinguishes them
Topics Covered
- Copyright, licensing and the models compared
- Professional conduct as the syllabus frames it
- Structuring an extended answer that reaches the top band
- Both sides, then a supported judgement
Topics Covered
- Relational databases, keys, normalisation to third normal form
- Entity relationship modelling, drawn as the paper expects
- SQL: DDL and DML, written correctly under exam conditions
- Why normalisation questions reward method over memory
Topics Covered
- State, describe, explain and evaluate as Cambridge uses them
- Answering to the mark allocation rather than to the topic
- Marking your own work against the real scheme
- Correct ideas that the scheme does not credit, and why
Topics Covered
- Gates, expressions, truth tables and simplification
- Karnaugh maps where the syllabus requires them
- Drawing circuits with the specified symbols
- Reliable marks, treated as reliable marks
Topics Covered
- A complete 75-mark paper under exam conditions
- Detailed review of every lost mark with the reason named
- A revision list built from actual errors, not from the topic list
- Retesting the same question types a fortnight later
Topics Covered
- Rebuilding the two or three areas the mock exposed
- Number-system arithmetic drilled back to automatic
- Extended responses rewritten to the band descriptors
- Short daily retrieval rather than long revision blocks
Topics Covered
- Cambridge pseudocode conventions, written exactly as specified
- Using the Insert of built-in functions rather than inventing names
- Why a personal style costs marks even when the logic is correct
- Selection, iteration and assignment in the expected format
Topics Covered
- Breaking a problem into modules the way the paper assesses it
- Structure charts with parameters shown correctly
- Flowchart symbols exactly as the syllabus specifies
- Stepwise refinement, examined directly
Topics Covered
- Completing a trace table for an unfamiliar algorithm
- Identifying the purpose of an algorithm from its trace
- Finding the deliberate error the question has planted
- Writing it down rather than tracing in the head
Topics Covered
- Linear and binary search, bubble and insertion sort in pseudocode
- Records, arrays and files as the syllabus treats them
- Abstract data types: stack, queue and linked list operations
- Timed Paper 2 questions on each
Topics Covered
- Procedures and functions, by value and by reference
- Local and global scope, a reliable short-answer topic
- Designing an interface before writing anything
- Reading a specification and reasoning about it
Topics Covered
- Serial, sequential, random and direct access files
- File operations in pseudocode with the correct built-in functions
- Exception handling as the syllabus describes it
- Test data: normal, boundary and erroneous
Topics Covered
- Analysis, design, coding, testing and maintenance
- Development models compared, with a reason for choosing one
- Program testing strategies and corrective maintenance
- Extended-response structure on this recurring topic
Topics Covered
- A complete 75-mark paper under exam conditions
- Marked against the real scheme rather than against intent
- Confirming pseudocode is written in the expected conventions
- Naming the specific habits costing marks
Topics Covered
- Papers 1 and 2 in the same week, as the series presents them
- Pacing across two 75-mark papers
- Identifying which of the two carries the remaining risk
- Directing the final weeks at the weaker one
Topics Covered
- Questions that span sections, which students meet unprepared
- Databases plus SQL plus data integrity in one question
- Networks plus security plus encryption in one question
- Recognising the shape rather than the topic
Topics Covered
- Both papers again from a different series
- Measuring improvement question type by question type
- Confirming that pacing holds on unfamiliar questions
- Final list of what still costs marks
Topics Covered
- A short specific plan for the final fortnight
- What is provided in each paper and what is not
- The first five minutes of each paper
- Walking in with the format already familiar
Topics Covered
- Floating-point representation, normalisation and precision
- Bit manipulation and the operations the syllabus names
- Protocols and circuit switching against packet switching
- Questions that combine representation with arithmetic
Topics Covered
- Processor scheduling, interrupts and virtual memory
- Paging, segmentation and thrashing explained precisely
- Virtual machines, and the trade-offs examiners ask about
- Translation software and the stages of compilation
Topics Covered
- Encryption and protocols at A Level depth
- Artificial intelligence as the syllabus frames it
- Machine learning concepts at the level the paper expects
- The newest content, where past questions are thinnest
Topics Covered
- Binary trees, traversal, hash tables and dictionaries
- Recursion, traced as well as written
- Big O reasoning at the level the syllabus requires
- Timed Paper 3 questions on each
Topics Covered
- The transition Paper 4 demands and Paper 2 forbids
- Choosing the language and committing to it
- Setting up the environment so the exam format is familiar
- Writing code that runs, from a scenario, from nothing
Topics Covered
- Classes, inheritance, polymorphism and encapsulation in code
- Implementing from a described design without deviating
- Where the practical paper expects object orientation
- Common errors that cost working marks
Topics Covered
- Implementing stacks, queues and linked lists that actually run
- File handling in the chosen language against the scenario
- Recursion implemented, tested and evidenced
- Programs written to a scenario rather than to a topic
Topics Covered
- What must be submitted alongside the program code
- Producing test evidence that demonstrates the program works
- Screenshots and output as the paper requires them
- Practising submission, not just programming
Topics Covered
- A complete 75-mark advanced theory paper
- Marked to the real scheme, reviewed mark by mark
- Identifying whether theory or practical is the risk
- A repair list from actual errors
Topics Covered
- A complete practical paper with code and test evidence submitted
- Working under time pressure with a compiler and a scenario
- Reviewing what did not run and why
- Repeating the scenario type until it is routine
Topics Covered
- Papers 3 and 4 again from a different series
- Measuring improvement question by question
- Confirming the practical workflow holds under time
- The last specific list of what still costs marks
Topics Covered
- A short specific plan for the final fortnight
- What each paper provides and what it does not
- The first five minutes of the practical paper
- Walking in with all four formats already familiar
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Prerequisites
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