Describe digital currency and its uses
Define electronically existing currency and explain how people may use it for digital transactions.
Exam scope and assessment notes
This sequence follows Cambridge IGCSE Computer Science 0984, 2026–2028 syllabus Version 4. It covers subject content sections 5.1–5.3 only. The separately published 2029–2031 syllabus is not mapped here. Practice is original, self-checked and does not award an official Cambridge grade. Full timed papers and human subject-teacher review remain outstanding. Cambridge states that 0984 has the same 2026–2028 subject content as 0478, with 9–1 grading. In June and November, Cambridge lists 0984 in Administrative zone 3 and for centres in Oman and the UAE. Confirm availability for your centre and exam series with Cambridge International. The separately published 2029–2031 syllabus changes to Python 3 only and removes pseudocode; this 2026–2028 route does not cover those changes.
Before you begin
- No programming language is required. Be comfortable with place value and multiplication; each lesson introduces the computer-science notation it uses.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What does a digital currency exist as?
What you will learn
- Define digital currency
- Describe electronic transfer and payment uses
- Avoid treating every digital account balance as cryptocurrency
Digital currency exists electronically
A digital currency is a form of currency that exists only electronically. It can be transferred between users or used to pay for goods and services through a digital system.
Apply and check the rule
Some digital currencies use a blockchain to track transactions; others may be managed through a central provider. Digital currency is the broad idea, while cryptocurrency is one kind. A bank's electronic record of a cash deposit is not automatically the same as a cryptocurrency.
Pause and explain
Can digital currency be used to pay a seller online?
Worked example
A user sends units of a digital currency to a seller through a payment application. What makes this a digital-currency transaction?
Show the worked solution
- The value exists in electronic form.
- The user authorises a digital transfer to the seller.
- The system records the payment electronically.
Answer The currency exists electronically and is transferred through a digital payment system.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Define digital currency in one sentence.
Give me a hint
State its form of existence.
Compare my reasoning
- It represents value used as currency.
- It exists electronically.
- It can be transferred or used for digital payments.
A digital currency is currency that exists electronically and can be transferred or used for payment through a digital system.
Look for these in your work
- Currency stated
- Electronic form
- Use included
A buyer pays a seller using a digital-currency wallet. Describe the exchange at a high level.
Give me a hint
Follow the authorised value transfer and record.
Compare my reasoning
- The buyer authorises a transfer of digital value.
- The payment system processes or records the transaction.
- The seller receives the payment according to that system's rules.
The buyer authorises an electronic transfer, the system records it, and the seller receives the digital payment.
Look for these in your work
- Transfer initiated
- System role
- Recipient outcome
A classmate says every electronic bank balance is a cryptocurrency and every digital currency uses blockchain. Correct both claims.
Give me a hint
Separate the broad category from one implementation.
Compare my reasoning
- Digital currency is the broader electronic-currency concept.
- Cryptocurrency is one type; systems can be managed in different ways.
- Some use blockchains, but not all digital currencies use the same ledger.
Digital currency is a broad category. Cryptocurrency is one type, and whether a blockchain is used depends on the currency's system.
Look for these in your work
- Category distinguished
- Cryptocurrency qualified
- Blockchain claim corrected
Common mistakes
- Equating all digital currency with one cryptocurrency
- Claiming all digital currencies use the same blockchain
What can you explain now?
What distinguishes a digital currency in the syllabus definition?
Compare with the explanation
It exists only electronically
It is represented and used electronically rather than as physical coins or notes.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
Define digital currency and give one use.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.