Which level is this paper for?

Secondary 4 ICT, used with the computer hardware and peripherals chapter.

What should I do after marking?

Redo only the wrong items and note whether the slip was conversion, units or concept.

S4 ICT | Computer Hardware and Peripherals Practice Paper 2

2026-11-03

Tutor Prep Guide · Secondary ICT

Paper 2 focuses on memory and storage types, binary versus decimal capacity and lossy compression ratios.

Attempt first, mark afterwards　Allow about twenty-five minutes; write the formula before substituting any numbers.

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: S4 ICT \| Computer Hardware and Peripherals Tutor Prep Guide
Level	S4 (Secondary 4) ICT

02　Questions (10 items)

FoundationHow many MB are there in 8 GB of memory (1 GB = 1,024 MB)?
FoundationWhich one is non-volatile storage: RAM, SSD, CPU registers, cache memory?
FoundationWhat is the key difference between lossy and lossless compression?
FoundationIn input and output classification, what type of device is a touch screen?
IntermediateAn uncompressed 1,920 x 1,080 bitmap at 24-bit colour takes about how many MB (1 MB = 1,000,000 B)?
IntermediateA USB drive labelled 128 GB shows about how many GiB (1 GB = 10^9 B, 1 GiB = 1,024^3 B)?
IntermediateAre keyboard, barcode scanner, drawing tablet and webcam all input devices?
ChallengeA 12-megapixel (4,000 x 3,000) 24-bit uncompressed photo is compressed 8:1 lossily. About how many MB?
ChallengeA 4-minute uncompressed recording at 44.1 kHz, 16-bit, stereo takes about how many MB (1 MB = 1,000,000 B)?
Error redoA student believes deleted files vanish from the hard disk at once. What really happens?

03　Answers and one-line notes

#	Answer	One-line note
1	8,192 MB	8 x 1,024 = 8,192; each binary prefix step multiplies by 1,024.
2	SSD	An SSD keeps its data without power; the other three lose everything when power goes off.
3	Lossy compression discards data and cannot be fully restored; lossless compression can	JPEG and MP3 are lossy, while ZIP and PNG are lossless.
4	Both an input device and an output device	The touch layer sends finger positions into the computer while the panel shows images.
5	About 6.2 MB	1,920 x 1,080 x 3 B = 6,220,800 B, which is about 6.2 MB.
6	About 119 GiB	128 x 10^9 divided by 1,024 cubed is about 119.2 GiB.
7	Yes, all four are input devices	All four only feed data into the computer, so none of them counts as an output device.
8	About 4.5 MB	Uncompressed it is 36 MB, and 36 divided by 8 is 4.5 MB.
9	About 42.3 MB	Each second needs 176,400 B; times 240 seconds gives 42,336,000 B.
10	The data stays on the disk; only the file-table link is removed, so recovery tools can retrieve it	Deletion only edits the file index; the sectors are truly cleared when overwritten.

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.