Which level is this paper for?

Secondary 5 ICT, used with the system development life cycle chapter.

What should I do after marking?

Redo only the wrong items and note whether the slip was concept, sequence or arithmetic.

S5 ICT | System Development Life Cycle Practice Paper 3

2026-11-03

Paper 3 tests cost and risk judgement: late defect costs, expected loss, schedule reserves, peak load and five-year cost.

Attempt first, mark afterwards　Allow about twenty-five minutes; set out cost formulas before substituting, and multiply probabilities to get expected values.

01　Paper details (check answers afterwards)

Item	Detail
Questions	10 items
Suggested time	About 25 minutes
Difficulty mix	Foundation 4 · Intermediate 3 · Challenge 2 · Error redo 1
Chapter	Chapter: S5 ICT \| System Development Life Cycle Tutor Prep Guide
Level	S5 (Secondary 5) ICT

02　Questions (10 items)

FoundationWhat is the biggest cost when a direct cutover fails?
FoundationWhich of these is a non-functional requirement: adding a loyalty points feature, showing fifty rows per report page, adding a refund button, or allowing receipt uploads?
FoundationWhat is scope creep?
FoundationWhich of these is system maintenance rather than new development?
IntermediateFixing a defect after release costs 2,000 dollars but only 200 dollars at design stage; how much extra is paid when ten defects are found late?
IntermediateOne extra month of parallel running costs 25,000 dollars; direct cutover fails with probability 20 percent and would cost 200,000 dollars. Which is safer?
IntermediateA project needs 8 weeks to build, 4 to test and 2 to deploy; how many weeks must be reserved before go-live?
ChallengeA system handles 12,000 transactions a day, and a three-hour peak carries 60 percent of the load; what is the average per hour at peak?
ChallengeOn-premise servers cost 18,000 dollars a year to run plus 60,000 dollars upfront; cloud costs 1,800 dollars a month. What is the five-year difference?
Error redoA student believes go-live ends the project; what is the correct view?

03　Answers and one-line notes

#	Answer	One-line note
1	There is no old system to fall back on, so operations stop at once	That is why direct cutover suits only small or low-risk systems.
2	Showing fifty rows per report page	The other three say what the system does; this one says how well it does it.
3	Requirements keep being added without control, pushing time and cost past budget	Each addition looks small, but together they overturn the original plan.
4	Fixing a program error found after the system went live	Maintenance covers corrective fixes, adapting to environment changes and performance tuning.
5	18,000 dollars	Each defect costs 1,800 dollars more, so ten defects add 18,000 dollars.
6	Parallel running, since 25,000 dollars is below the expected loss of 40,000 dollars	The expected loss is 200,000 times 0.2, which is 40,000 dollars and above the parallel cost.
7	14 weeks, which is 98 days	8 plus 4 plus 2 gives 14 weeks, and 14 times 7 gives 98 days.
8	2,400 transactions	12,000 times 0.6 gives 7,200, and dividing by three hours gives 2,400 per hour.
9	On-premise 150,000 dollars versus cloud 108,000 dollars, so cloud is 42,000 dollars lower	On-premise is 18,000 times five plus 60,000, while cloud is 1,800 times twelve times five.
10	Go-live starts maintenance and review, which often takes a large share of total cost	Go-live is the start of delivery, and the longest phase follows it.

04　What to do after marking

After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
Repeat the same item two days later; move to the next paper only when both attempts are correct.
Parents only need the answer and note columns; there is no need to explain every item.

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Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.