Computer Science exam technique and programming tasks

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Know the papers

Check the current specification and assessment arrangements for your chosen board: paper names, timing and programming requirements vary.
This generic lesson practises computer-systems knowledge, algorithms, tracing and programming responses; its illustrative papers do not represent official exam documents.

Preparing systems and programming skills

Command words

State/Give/Name: short fact. Describe: say what something is or does. Explain: give a reason ("because"). Compare: similarities and differences. Evaluate/Discuss: weigh up advantages and disadvantages and reach a judgement. Write/Complete: produce code or fill in a table.

Answering a storage question

Reading and writing algorithms

Read pseudocode carefully; trace with a table; write code using the language or pseudocode listed. Use meaningful names, indentation and comments. Check boundaries and loop conditions (off-by-one errors).

Check an algorithm with a trace

Extended-response questions

Use chains of reasoning: point, because, therefore. Apply knowledge to the scenario; use technical terms accurately; include both sides for evaluation.

Calculations

Convert between binary, denary and hexadecimal; file-size calculations; show working.

Time management

Use the paper’s actual duration and total marks to plan an approximate time budget, leaving time to check. Do not assume a universal one-mark-per-minute rule.
Attempt relevant steps in difficult questions; partial-credit rules depend on the mark scheme.

Revision

Practise past papers; flash cards for key terms; write code; use trace tables; review mistakes.

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Übungsfragen

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1.What does the command word State normally ask you to provide?
Easy
- Aa concise relevant fact
- Ban unsupported personal opinion
- Cevery fact you know
- Da complete program regardless of the question
2.What does 'describe' ask you to do?
Easy
- Asay what something is or does
- Bmake a list
- Cdraw only
- Dgive a number
3.What does 'compare' ask for?
Easy
- Asimilarities and differences
- Bone fact
- Ca drawing
- Da code
4.What is a good way to prepare for exams?
Easy
- Apractise past papers
- Bread once
- Cavoid practice
- Dskip topics
5.Which tool helps you follow an algorithm step by step?
Easy
- Atrace table
- Bflowchart only
- Ccompiler
- DIDE
6.For a 6-mark evaluate question, what should you include?
Easy
- Aadvantages, disadvantages and a judgement
- Bone fact
- Ca list of terms
- Da diagram only
7.What does 'off-by-one' error mean?
Easy
- Aa loop runs one too many or too few times
- Bone wrong letter
- Ca missing semicolon
- Da crash
8.What is the first step when answering a pseudocode question?
Easy
- Aread the code and any variables carefully
- Bguess
- Cskip
- Dwrite at once

Mehr Fragen

9.What should you do if you are unsure how to write code?
Easy
- Aattempt it using the keywords you know
- Bleave it blank
- Ccopy the question
- Dwrite nothing
10.What is a chain of reasoning?
Easy
- Alinking points with because and therefore
- Blisting facts
- Cone word
- Da diagram
11.What is a strategy for hexadecimal conversion questions?
Medium
- Aconvert each hex digit to 4 bits
- Bguess
- Cuse decimal only
- Dskip
12.What does 'trace the algorithm' mean?
Medium
- Afollow the steps with test data recording values
- Bcopy it
- Crun it on a computer only
- Dignore it
13.Which is an example of a technical term?
Medium
- Afirewall
- Bthing
- Cstuff
- Ditem
14.Why show your working in calculations?
Medium
- Amarks may be awarded for method
- Bit wastes time
- Cit is not allowed
- Dit confuses
15.What does 'discuss' require?
Medium
- Aconsider different points of view
- Blist one fact
- Cgive a number
- Dcopy code
16.For a large sorted list, which best explains binary search’s lower worst-case comparison count?
Medium
- Astate it halves the list each time, so fewer comparisons are needed
- Blist sorting algorithms
- Cdefine binary
- Ddraw a flowchart
17.Which answer best explains one practical benefit of cloud storage?
Medium
- AAuthorised users can access files on compatible devices with a network connection, allowing work from different locations.
- BCloud is good.
- CIt is online.
- DStorage.
18.When writing code, why use meaningful variable names?
Medium
- Ato make code easier to read and maintain
- Bto slow it down
- Cto hide logic
- Dto increase memory
19.Why is it useful to attempt relevant steps in a difficult programming question?
Medium
- Ayou cannot gain any marks
- Byou gain marks
- Cyou save memory
- Dnothing
20.What does 'algorithm' mean in an exam context?
Easy
- Aa step-by-step set of instructions
- Ba type of computer
- Ca network
- Da chip
21.What does 'evaluate' mean?
Easy
- Amake a judgement after weighing evidence
- Blist facts
- Cdescribe
- Dname
22.Which revision method uses active recall?
Medium
- Aflash cards and self-testing
- Brereading only
- Chighlighting only
- Dwatching only
23.What should you check in a loop?
Medium
- Athe start, end and update of the counter
- Bthe colour
- Cthe font
- Dthe title
24.Command words tell you the type of answer needed.
Easy
True or false?
25.Past papers help with revision.
Easy
True or false?
26.You should leave programming questions blank if unsure.
Easy
True or false?
27.Showing working in calculations can earn method marks.
Easy
True or false?
28.Evaluate questions need only one point.
Medium
True or false?
29.Which are command words?
Medium
- Astate
- Bdescribe
- Cexplain
- Dcompare
- Ecompiler
30.Which are good revision techniques?
Medium
- Apast papers
- Bflash cards
- Cwriting code
- Dtrace tables
- Eignoring weak topics
31.Explain how you would approach a 6-mark question that begins 'Evaluate the use of cloud storage for a school'.
Medium

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