You want to create a controller method that accepts multiple values for the same query parameter "tag" like ?tag=java&tag=spring. Which is the correct way to declare the parameter using @RequestParam?

hard📝 Application Q8 of 15

Spring Boot - REST Controllers

You want to create a controller method that accepts multiple values for the same query parameter "tag" like ?tag=java&tag=spring. Which is the correct way to declare the parameter using @RequestParam?

A@RequestParam List<String> tag

B@RequestParam String tag[]

C@RequestParam Map<String, String> tag

D@RequestParam String tag

Step-by-Step Solution

Solution:

Step 1: Understand multiple query parameters
When multiple values are passed for the same parameter, Spring can bind them to a List or array.
Step 2: Choose correct parameter type
List is the recommended type for multiple values with @RequestParam.
Final Answer:
@RequestParam List<String> tag -> Option A
Quick Check:
Use List for multiple query param values [OK]

Quick Trick: Use List for repeated query params [OK]

Common Mistakes:

Using single String for multiple values
Using Map instead of List for repeated params
Incorrect array syntax in method parameters

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You want to create a controller method that accepts multiple values for the same query parameter "tag" like ?tag=java&tag=spring. Which is the correct way to declare the parameter using @RequestParam?

Step 1: Understand multiple query parameters

Step 2: Choose correct parameter type

Final Answer:

Quick Check:

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