Pearson Edexcel GCSE In Computer Science (1CP0/01) Paper 1: Principles of Computer Science..Mark Scheme (Results) November 2021

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Question Number Answer Additional Guidance Mark 1(a) D 1 Question Number Answer Additional Guidance Mark 1(b) Any two from: • Anti-virus • Anti-spyware • Firewall • File management ... • File repair/recovery • File conversion • Compression • Defragmentation • Back up Accept ‘anti-malware’ if mark not already awarded for Mark point 1/2 2 Question Number Answer Additional Guidance Mark 1(c) Machine code / binary (1) Processor / CPU (1) Accept ‘computer’ 2 Question Number Answer Additional Guidance Mark 1(d) An explanation to include two linked points such as: • The source code is not available (1) because the compiler converts the code to machine code (1) • Compiled code is not human readable (1) so nobody else can alter it or sell it on (1) • Compiled code is difficult/impossible to reverse engineer (1) so nobody else can alter it or sell it on (1) 2 https://britishstudentroom-b430a.web.app/5 Question Number Answer Additional Guidance Mark 2(a) X Y Z Y AND Z X OR (Y AND Z) 0 1 0 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 1 6 Question Number Answer Additional Guidance Mark 2(b) Arithmetic Logic Unit / ALU 1 Question NumberQuestion Number Answer Additional Guidance Mark 1(a) D 1 Question Number Answer Additional Guidance Mark 1(b) Any two from: • Anti-virus • Anti-spyware • Firewall • File management • File repair/recovery • File conversion • Compression • Defragmentation • Back up Accept ‘anti-malware’ if mark not already awarded for Mark point 1/2 2 Question Number Answer Additional Guidance Mark 1(c) Machine code / binary (1) Processor / CPU (1) Accept ‘computer’ 2 Question Number Answer Additional Guidance Mark 1(d) An explanation to include two linked points such as: • The source code is not available (1) because the compiler converts the code to machine code (1) • Compiled code is not human readable (1) so nobody else can alter it or sell it on (1) • Compiled code is difficult/impossible to reverse engineer (1) so nobody else can alter it or sell it on (1) 2 https://britishstudentroom-b430a.web.app/5 Question Number Answer Additional Guidance Mark 2(a) X Y Z Y AND Z X OR (Y AND Z) 0 1 0 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 1 6 Question Number Answer Additional Guidance Mark 2(b) Arithmetic Logic Unit / ALU 1 Question Number [Show More]

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