LLD - Design — Parking Lot System
Which of the following is the correct JSON structure to represent a payment request with amount and currency?
Which of the following is the correct JSON structure to represent a payment request with amount and currency?
easy🧠 Conceptual Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Recall JSON syntax rules
JSON keys and string values must be double-quoted. Numbers do not need quotes.Step 2: Check each option
{ \"amount\": 100, \"currency\": \"USD\" } uses double quotes correctly. { 'amount': 100, 'currency': 'USD' } uses single quotes (invalid JSON). { amount: 100, currency: USD } lacks quotes around keys and string value. { amount = 100, currency = 'USD' } uses equals sign instead of colon.Final Answer:
{ "amount": 100, "currency": "USD" } -> Option DQuick Check:
Valid JSON = Double quotes for keys and strings [OK]
Quick Trick: JSON keys and strings need double quotes [OK]
Common Mistakes:
MISTAKES- Using single quotes instead of double quotes
- Omitting quotes around string values
- Using equals sign instead of colon
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