← IGCSE Computer Science Paper 1

What a ledger record contains

One entry in a ledger that states who sent the money (sender), who received it (receiver) and how much was sent (amount). Each transaction gets its own record.

Part of: IGCSE Computer Science 0478 — 5.2 Digital Currency — Module 14

Understanding What a ledger record contains in IGCSE Computer Science Paper 1

What it does: This one line shows all three parts: Ava is the sender, Liam is the receiver and 10 is the amount. There are two separate transactions, so the ledger has two separate records, one on each line. A ledger record states who sent the money, who received it and how much was sent. The receiver is the person who gets the money. Ava is the sender. The amount is how much was sent. Ben is the receiver, not the amount. The second record has no receiver, so we cannot tell who got the money. Who sent the money is the sender. The amount is the value sent.

Common mistakes: The comment says Zoe sends the money, so Zoe is the sender. The line should be sender: Zoe. Max is the receiver. The transaction sends 8 coins, so the amount in the record must be 8. The line should be amount: 8.

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This module's key terms are also in a printable crossword (Modules 510–519) and word search (Modules 510–546).

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Learning
Duo
Which set of details does a ledger record for a currency transaction state?
Sender, receiver and amountSender's password, receiver's address and the bank's logo
Matches
Ava -> Liam
↓
The amount is missing. A ledger record must also say how much money was sent.
Applying
Meanings
Term
ledger record
Meaning
One entry in a ledger that states who sent the money (sender), who received it (receiver) and how much was sent (amount). Each transaction gets its own record.
Practice
Record 1: Sender=Ava, Receiver=Liam, Amount=20
Testing
Gaps
record: =Ava, receiver=Ben, amount=20
Check Answer
Spots
1# Zoe sends Max 15 coins
2sender: Max

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Quick Questions

1. Which set of details does a ledger record for a currency transaction state?
A. Sender's password, receiver's address and the bank's logo
B. Sender, receiver and amount ✓
A ledger record states who sent the money, who received it and how much was sent.
2. Ava sends 20 coins to Ben. Who is the receiver in the ledger record?
A. Ben ✓
B. Ava
The receiver is the person who gets the money. Ava is the sender.
3. Ava sends 20 coins to Ben. What is the amount in the ledger record?
A. 20 coins ✓
B. Ben
The amount is how much was sent. Ben is the receiver, not the amount.
4. Ava sends 20 coins to Ben, then Ben sends 5 coins to Cara. How many ledger records are needed?
A. 1 record that combines both transactions
B. 2 records, one per transaction ✓
Each transaction gets its own record, so two transactions need two records.
5. Which ledger record is complete?
A. Sender: Mia, Receiver: Leo, Amount: 15 ✓
B. Sender: Mia, Amount: 15
The second record has no receiver, so we cannot tell who got the money.

Match the Pairs

Sender: Ava → Shows who the money came from in this ledger record
Amount: 25 → Shows how much money was sent in this ledger record
A ledger record names the sender, the receiver and the amount → Ava -> Liam : 10
Each transaction gets its own record, so two payments need two lines → Ava -> Liam : 10 Mia -> Noah : 5
Ava -> Liam → The amount is missing. A ledger record must also say how much money was sent.
Ava -> Liam, Mia : 10, 20 → Two transactions are squashed into one record. Each transaction needs its own record with one sender, one receiver and one amount.

Key Term

ledger record
One entry in a ledger that states who sent the money (sender), who received it (receiver) and how much was sent (amount). Each transaction gets its own record.

Fill in the Blanks

1. record: sender=Ava, receiver=Ben, amount=20
Hint: Type the field name that shows who sent the money
2. record: sender=Ava, receiver=Ben, amount=20
Hint: Type the field name that shows who got the money
3. record: sender=Ava, receiver=Ben, amount=20
Hint: Type the field name that shows how much money was sent
4. Ava pays Ben 20 coins record: sender=Ava, receiver=Ben, amount=20
Hint: Type the amount that the transaction above says was sent
5. Ava pays Ben 20 coins Zoe pays Max 5 coins records needed: 2
Hint: Type how many records the ledger needs, with one record per transaction

Spot the Error

Question 1
A # Zoe sends Max 15 coins
B sender: Max
C receiver: Max
D amount: 15
Line B — The comment says Zoe sends the money, so Zoe is the sender. The line should be sender: Zoe. Max is the receiver.
Question 2
A # Ravi sends Mia 8 coins
B sender: Ravi
C receiver: Mia
D amount: 80
Line D — The transaction sends 8 coins, so the amount in the record must be 8. The line should be amount: 8.
Question 3
A # Lily sends Omar 12 coins
B sender: Lily
C amount: 12
D receiver: Lily
Line D — Omar receives the money, so he is the receiver. Lily is the sender and cannot also be the receiver. The line should be receiver: Omar.
Question 4
A # Ava to Ben 5, Cai to Dee 9
B Record 1: Ava > Ben, 5
C Record 2: Cai > Dee
Line C — Every ledger record must state the amount as well as the sender and receiver. The amount is missing. The line should be Record 2: Cai > Dee, 9.
Question 5
A # Jo pays Sam 6, Jo pays Ed 7
B Record 1: Jo > Sam, Ed, 13
C Record 2: Jo > Ed, 7
Line B — Each transaction gets its own record. Jo's two payments must not be merged into one record. The line should be Record 1: Jo > Sam, 6.

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