Specification J277. Explore a topic, practise the skill, and see where to focus next.
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OCR · Computer Science · J277LearningP is independent of OCR · Computer Science. Use the current official documents for assessment requirements.
Try three different Computer Science skills from this OCR · Computer Science route. See what went right, understand a mistake, and find a useful next step.
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The clock produces timing pulses used to coordinate CPU activity. Clock speed is the number of cycles per second, although more cycles alone do not determine total performance.
An SSD has no moving parts, offers fast access and tolerates movement better than a magnetic disk. It normally costs more per gigabyte, but that is less important in this scenario.
Authentication verifies users, MAC filtering controls listed devices and a firewall applies traffic rules. Combining controls provides defence in depth, although none guarantees complete security.
These tiles show your answers to three questions. They are a starting point, not a mastery score or grade prediction.
Correct answer: It sends regular timing pulses that synchronise processor operations
The clock produces timing pulses used to coordinate CPU activity. Clock speed is the number of cycles per second, although more cycles alone do not determine total performance.
Correct answer: Solid-state drive
An SSD has no moving parts, offers fast access and tolerates movement better than a magnetic disk. It normally costs more per gigabyte, but that is less important in this scenario.
Correct answer: Each controls a different aspect of access, so layered controls reduce reliance on one defence
Authentication verifies users, MAC filtering controls listed devices and a firewall applies traffic rules. Combining controls provides defence in depth, although none guarantees complete security.
For parents: look at the explanation together. A correct answer is encouraging; a missed answer gives you something specific to work on. Broader practice over time is needed to understand progress.
The clock produces timing pulses used to coordinate CPU activity. Clock speed is the number of cycles per second, although more cycles alone do not determine total performance.
Watch for: Do not describe Systems architecture vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
An SSD has no moving parts, offers fast access and tolerates movement better than a magnetic disk. It normally costs more per gigabyte, but that is less important in this scenario.
Watch for: Do not describe Memory and storage vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
Authentication verifies users, MAC filtering controls listed devices and a firewall applies traffic rules. Combining controls provides defence in depth, although none guarantees complete security.
Watch for: Do not describe Computer networks, connections and protocols vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
Biometric access checks a physical characteristic, while email confirmation alerts and requires action through another account. Layering them reduces dependence on a single control.
Watch for: Do not describe Network security vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
On a magnetic disk, placing file blocks more contiguously can reduce mechanical head movement; the same rationale does not apply in the same way to solid-state storage.
Watch for: Do not describe Systems software vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
Responsible disclosure gives the organisation an opportunity to reduce harm while avoiding unauthorised access or premature release of exploit details. Exact legal duties depend on jurisdiction and authorisation.
Watch for: Do not describe Ethical, legal, cultural and environmental impacts of digital technology vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
Binary search compares with the middle item and eliminates half of the remaining sorted list at each step. This normally requires far fewer comparisons than a linear search on a large list.
Watch for: Do not describe Algorithms vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
A count-controlled loop is appropriate when the number of repetitions is known in advance. A condition-controlled loop is better when repetition depends on a changing condition.
Watch for: Do not describe Programming fundamentals vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
Repeated halving is generally more efficient on large sorted data, while fitness for purpose also requires evidence that normal, boundary and absent-target cases behave correctly.
Watch for: Do not describe Producing robust programs vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
The first brackets combine either intrusion input; AND NOT Disarmed then ensures the alarm is enabled before sounding.
Watch for: Do not describe Boolean logic vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
A compiler translates the whole high-level program into machine code that can be distributed and run repeatedly without the original source. The machine code is processor/platform dependent.
Watch for: Do not describe Programming languages and integrated development environments vaguely. Trace the algorithm, data or system state precisely and test boundary or failure cases.
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OCR · Computer Science · GCSE · Computer Science · J277
Version 3.1, May 2026
Source checked: 2026-08-28. The current official specification controls assessment requirements and option choices.
Yes. This page offers three original questions from three different skills on this exact course. Each answer has an explanation, followed by a sample heatmap showing what was correct and what to revisit. No account is needed, and taster answers are not saved.
It shows the outcome of these three answers and gives a specific skill to discuss or practise next. It is not a full assessment, a mastery score or a grade prediction. Broader practice over time is needed to understand progress.
LearningP currently maps 11 assessed areas for specification J277. The visible topic map below is derived from the verified route; the current official specification remains controlling.
The verified source bank contains 252 original LearningP question records for this route. Every mapped area meets the current publication minimum and passed the latest blocker and review audit.
No. LearningP uses official specifications and assessment materials to map content and demand, while its practice questions and explanations are independently authored.
No. LearningP reports practice evidence, coverage, strengths and gaps. It does not guarantee or automatically predict examination outcomes.
Use the official OCR · Computer Science specification and assessment-resource pages linked on this page, together with information supplied by the learner’s school.