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Computer Science

Pearson Edexcel GCSE 1CP2 · Craig 'n' Dave videos · 6 topic areas · Component 1 written exam + Component 2 programming project

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CS XP

Topic 1A — Algorithms & Programming

Algorithms, pseudocode, searching and sorting, data structures. Ander's strongest area in the mock.

Topic 1A
Algorithms & Pseudocode
Abstraction, decomposition, trace tables, flowcharts, efficiency
Not attempted
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Topic 1A
Searching & Sorting Algorithms
Linear search, binary search, bubble sort, merge sort
Not attempted
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Topic 1A
Programming Concepts
Variables, constants, data types, sequence, selection, iteration, subprograms
Not attempted
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Topic 1A
Data Structures & Arrays
1D and 2D arrays, records, how they are used in programs
Not attempted
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Topic 1B — Logic & Topic 2A — Binary

Binary conversion was a relative strength in the mock. Logic gates need more work.

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Interactive tools — use these first
Binary converter, hex converter, addition, two's complement — all interactive
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Topic 2A
Binary, Hex & Number Systems
Converting, binary addition, shifts, two's complement, why hex is used
Not attempted
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Topic 1B
Logic Gates & Truth Tables
AND, OR, NOT, XOR — drawing gates, completing truth tables, solving circuit problems
Not attempted
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Topic 2B — Data Representation

Images, sound, compression, storage units. File size calculation questions appear regularly.

Topic 2B
Images, Sound & File Sizes
Pixels, colour depth, resolution, sample rate, bit depth — calculate file sizes
Not attempted
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Topic 2B
Compression & Storage Units
Lossy vs lossless, run-length encoding, Huffman coding, KB/MB/GB/TB
Not attempted
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Topic 3A & 3B — Hardware & Software

CPU architecture, storage, operating systems, programming languages. All new content — not covered on the old page.

Topic 3A
CPU Architecture & Fetch-Execute
Von Neumann, ALU, CU, MAR, MDR, PC, Accumulator, fetch-decode-execute cycle
Not attempted
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Topic 3A
Storage — Types, Devices & Media
RAM vs ROM vs cache, magnetic vs optical vs solid-state — comparison and suitable use
Not attempted
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Topic 3A
Embedded Systems & IoT
What embedded systems are, real-world examples, Internet of Things implications
Not attempted
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Topic 3B
Operating Systems & Utility Software
OS functions, multitasking, scheduling, memory management, utility software
Not attempted
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Topic 3B
Programming Languages & Translators
High-level vs low-level, machine code, assembly, compilers vs interpreters
Not attempted
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Topic 4 — Networks & Network Security

LAN, WAN, protocols, topologies, network security. Typically 15–20 marks on Component 1.

Topic 4
Networks — Types, Topology & Hardware
LAN vs WAN, bus/ring/star topology, routers, switches, WAP, NIC, wired vs wireless
Not attempted
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Topic 4
Internet Structure & Protocols
HTTP/S, FTP, SMTP, POP, IMAP, TCP/IP layers, DNS, IP addressing
Not attempted
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Topic 4
Network Security & Vulnerabilities
Network threats, firewalls, authentication, encryption, MAC filtering, penetration testing
Not attempted
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Topic 5 — Issues & Impacts

Cybersecurity, malware, social engineering, ethical and legal issues. Extended answers required.

Topic 5
Malware & Cyber Threats
Viruses, trojans, worms, ransomware, keyloggers, spyware — how each works and spreads
Not attempted
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Topic 5
Social Engineering
Phishing, blagging, baiting, shouldering — manipulating people, not systems
Not attempted
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Topic 5
Protecting Digital Systems & Data
Anti-malware, firewalls, encryption, access control, backups, penetration testing
Not attempted
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Topic 5
Ethical, Legal & Environmental Issues
Data privacy, GDPR, copyright, AI ethics, environmental impact of computing
Not attempted
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Paper 1 · Programming
Operators & String Handling
MOD, DIV, relational, Boolean operators. LEN, SUBSTRING, UPPER, charAt, concatenation
Not attempted
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Paper 1 · Programming
Subprograms
Functions vs procedures, parameters, arguments, return values, local and global scope
Not attempted
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Paper 1 · Programming
Trace Tables & Dry Running
Dry running code line-by-line, completing trace tables, predicting output, finding bugs
Not attempted
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Paper 1 · Programming
File Handling
OPEN, READ, WRITE, CLOSE, ENDOFFILE in Edexcel pseudocode. Sequential file access
Not attempted
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