OCR J277 · Papers 1 and 2
Computer Science practice paper: systems and algorithms
Exam-style questions on architecture, storage, networks, security, algorithms and logic.
Every question is written for practice and tied to a real specification point. Marking updates progress for those spec points, not for KS3 objectives.
Exam-style paper
Computer Science practice paper: systems and algorithms
8 questions, 27 marks. Answer everything, then mark the paper to see the mark scheme. There is no timer — the 35 minutes is only a guide.
1. Which register holds the address of the next instruction to be fetched?
3 marks1.1 · Systems architecture
2. Convert the binary number 10110110 to hexadecimal.
3 marks1.2 · Memory and storage
3. Which is true of lossy compression?
3 marks1.2 · Memory and storage
4. What is the purpose of the TCP/IP layers?
3 marks1.3 · Networks and topologies
5. Which measure best prevents SQL injection?
3 marks1.4 · Network security
6. A binary search requires the data to be:
4 marks2.1 · Algorithms
7. What does a FOR loop provide that a WHILE loop does not?
4 marks2.2 · Programming fundamentals
8. What is the output of NOT(A AND B) when A = 1 and B = 0?
4 marks2.3–2.5 · Testing, logic and languages