Free Text, sound & images questions for IGCSE Computer Science (0478), part of Data representation. Each question has the answer and the marking points an examiner would look for.
Generate a full Text, Sound & Images worksheet →All Data representation questionsA sound is recorded for 120 seconds at a sample rate of 32000 Hz and a sample resolution of 16 bits.
Calculate the file size in mebibytes (MiB). Show your working.
| Part | Answer and marking points | Marks |
|---|---|---|
| 7.32 MiB 32000 × 16 × 120 M1 ÷ 8 ÷ 1024 ÷ 1024 M1 7.32 A1 | 3 |
State what is meant by the term sample resolution.
State what is meant by the term character set.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | The number of bits used to store each sound sample The number of bits used to store each sound sample B1 | 1 |
| (b) | A list of characters recognised by a computer, each with a unique binary code A list of characters recognised by a computer, each with a unique binary code B2 | 2 |
An image is 640 pixels wide and 256 pixels high, with a colour depth of 8 bits.
Calculate the file size in kibibytes (KiB). Show your working.
| Part | Answer and marking points | Marks |
|---|---|---|
| 160 KiB 640 × 256 × 8 M1 ÷ 8 ÷ 1024 M1 160 A1 | 3 |
State what is meant by the term character set.
State what is meant by the term sample resolution.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | A list of characters recognised by a computer, each with a unique binary code A list of characters recognised by a computer, each with a unique binary code B2 | 2 |
| (b) | The number of bits used to store each sound sample The number of bits used to store each sound sample B1 | 1 |
A sound is recorded for 10 seconds at a sample rate of 8000 Hz and a sample resolution of 8 bits.
Calculate the file size in mebibytes (MiB). Show your working.
| Part | Answer and marking points | Marks |
|---|---|---|
| 0.0763 MiB 8000 × 8 × 10 M1 ÷ 8 ÷ 1024 ÷ 1024 M1 0.0763 A1 | 3 |
A sound is recorded for 60 seconds at a sample rate of 8000 Hz and a sample resolution of 16 bits.
Calculate the file size in mebibytes (MiB). Show your working.
| Part | Answer and marking points | Marks |
|---|---|---|
| 0.916 MiB 8000 × 16 × 60 M1 ÷ 8 ÷ 1024 ÷ 1024 M1 0.916 A1 | 3 |
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Meet Riyaz →Original Cambridge-style practice questions written for mentorriyaz.in. These are not Cambridge past paper questions, and this site is not affiliated with or endorsed by Cambridge University Press & Assessment. Updated 2026-11-04. Paper generator · mentorriyaz.in