[Solved] Consider this controller method:@GetMapping("/search/{type}") public String search(@PathVariable String type,... }What is the output of accessing /search/book without query parameters? | Spring Boot

Spring Boot - Request and Response Handling

Consider this controller method:

@GetMapping("/search/{type}")
public String search(@PathVariable String type, @RequestParam(required = false) String keyword) {
    if (keyword == null) return "Search all " + type;
    else return "Search " + type + " for " + keyword;
}

What is the output of accessing /search/book without query parameters?

ASearch all book

BSearch book for null

CError: Missing required query parameter 'keyword'

DSearch book for ''

Step-by-Step Solution

Solution:

Step 1: Check if query parameter is optional
@RequestParam(required = false) means 'keyword' can be null.
Step 2: Analyze method logic for null keyword
If keyword is null, method returns "Search all " + type.
Final Answer:
Search all book -> Option A
Quick Check:
Optional query param null handled correctly = output correct [OK]

Quick Trick: Use required=false to allow missing query params [OK]

Common Mistakes:

Expecting error when optional query param missing
Assuming empty string instead of null
Confusing path variable with query param

Master "Request and Response Handling" in Spring Boot

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Perf

More Spring Boot Quizzes

Consider this controller method:

Step 1: Check if query parameter is optional

Step 2: Analyze method logic for null keyword

Final Answer:

Quick Check:

Want More Practice?