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S4 ICT Cloud and IoT: Paper 2 Bandwidth and Resources
S4 ICT Cloud and IoT: Paper 2 Bandwidth and Resources
This paper puts capacity maths into real settings: upload time and two-step conversion, then total samples, packet counts and VM resources, followed by latency ratios, compression gains and capacity comparison, and a correction where adding was used instead of multiplying.
Direct answers Items 01 to 03 cover conversion and sample volume, 04 to 06 cover packets, VMs and latency ratios, 07 to 09 are compression, comparison and throughput, and 10 corrects a wrong answer.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: S4 ICT Cloud Computing and IoT |
| Level | S4 |
02 Questions (10 items)
- FoundationA 720 MB file is uploaded at 12 MB per second. How long does it take?
- FoundationHow many MB is 2 TB, if 1 TB = 1024 GB and 1 GB = 1024 MB?
- FoundationA sensor samples 500 times per second for 4 hours. How many samples in total?
- IntermediateThirty devices each send 12 packets per minute. How many packets in one day of 1440 minutes?
- IntermediateEach cloud VM uses 4 vCPU and 8 GB RAM. What do 6 VMs need in total?
- IntermediateThe same task takes 5 ms locally and 45 ms in the cloud. How many times slower is the cloud?
- ChallengeA 250 GB backup shrinks by 60 percent after compression. How much is uploaded?
- ChallengeCompare a 512 GB local SSD with 0.5 TB of cloud space. Are they the same size?
- ChallengeAn IoT gateway handles 150 messages per second. How many in one minute?
- Error redoA student wrote that five VMs of 6 vCPU each need 11 vCPU. What went wrong, and what is correct?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 60 seconds | 720 divided by 12 is 60 seconds, which is one minute. |
| 2 | 2,097,152 MB | 2 times 1024 twice gives 2,097,152 MB. |
| 3 | 7,200,000 samples | 500 times 4 times 3600 gives 7,200,000 samples. |
| 4 | 518,400 packets | 30 times 12 times 1440 gives 518,400 packets. |
| 5 | 24 vCPU and 48 GB | 6 times 4 is 24 vCPU and 6 times 8 is 48 GB. |
| 6 | 9 times | 45 divided by 5 is 9, so the cloud path is nine times slower. |
| 7 | 100 GB | 250 times 0.4 is 100 GB, saving 150 GB of transfer. |
| 8 | Yes, both are 512 GB | 0.5 times 1024 is 512 GB, so the two offers match. |
| 9 | 9,000 messages | 150 times 60 is 9,000 messages per minute. |
| 10 | He added instead of multiplying; the answer is 30 vCPU | Each VM needs 6 vCPU, so 5 VMs need 6 times 5, which is 30. |
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.
S4 ICT cloud and IoT paper 2: ten answered items on upload time, conversion, packets, VM resources and compression.Tutor Registration →
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.