A Level WJEC Computer Science - Unit 4 Examination Revision Workbook (with teacher answers). This is a comprehensive e-book for teachers to use in class or via home-learning. WJEC past paper questions are collated in a workbook format to be used on devices for easy marking.
 
Questions are regarding:
 
4.1.1 ARCHITECTURE
4.1.2 ASSEMBLY LANGUAGE PROGRAMMING
4.1.3 INPUT / OUTPUT
4.1.4 NETWORKING
4.2.1 COMMUNICATION NETWORKS
4.3.1 REPRESENTATION OF NUMBERS AS BIT PATTERNS
4.4.1 FILE DESIGN
4.4.2 FILE ORGANISATION
4.5.1 DATA VALIDATION AND VERIFICATION
4.5.2 SEARCHING DATA
4.5.3 DATABASE MANAGEMENT SYSTEMS
4.5.4 BIG DATA
4.5.5 DISTRIBUTED SYSTEMS
4.6.1 TYPES OF OPERATING SYSTEMS
4.6.2 INTERRUPTS
4.6.3 MEMORY MANAGEMENT AND BUFFERING
4.6.4 SCHEDULING
4.7.1 SAFETY AND CONTROL RELATED SYSTEMS
4.7.4 EXPERT SYSTEMS
4.7.5 INTERNET AND INTRANET
4.8.1 PROTECTING DATA INTEGRITY
4.8.2 CRYPTOGRAPHY
4.8.3 BIOMETRICS
4.8.4 MALICIOUS SOFTWARE AND MECHANISMS OF ATTACK AND DEFENCE