How do you declare a query parameter named count as optional with a default value of 5 using @RequestParam in a Spring Boot controller method?

easy📝 Syntax Q3 of 15

Spring Boot - REST Controllers

How do you declare a query parameter named count as optional with a default value of 5 using @RequestParam in a Spring Boot controller method?

A@RequestParam(value = "count", defaultValue = "5") int count

B@RequestParam(required = true, defaultValue = "5") int count

C@RequestParam(value = "count", required = true) int count

D@RequestParam int count = 5

Step-by-Step Solution

Solution:

Step 1: Use @RequestParam with value attribute
The value attribute specifies the query parameter name.
Step 2: Set defaultValue attribute
Setting defaultValue = "5" makes the parameter optional and assigns a default if missing.
Step 3: Avoid required=true when defaultValue is set
When defaultValue is provided, required is implicitly false.
Final Answer:
@RequestParam(value = "count", defaultValue = "5") int count -> Option A
Quick Check:
Default value makes parameter optional [OK]

Quick Trick: Use defaultValue to make @RequestParam optional [OK]

Common Mistakes:

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