[Solved] Consider this controller method:@GetMapping("/books/{bookId}") public String getBook(@PathVariable int bookId, @RequestParam int page)... }What error will occur if a client calls /books/abc?page=2? | Spring Boot

Spring Boot - Request and Response Handling

Consider this controller method:

@GetMapping("/books/{bookId}")
public String getBook(@PathVariable int bookId, @RequestParam int page) {
    return "Book: " + bookId + ", Page: " + page;
}

What error will occur if a client calls /books/abc?page=2?

A404 Not Found because path variable missing

B500 Internal Server Error due to null page

C400 Bad Request due to type mismatch

DNo error, returns "Book: abc, Page: 2"

Step-by-Step Solution

Solution:

Step 1: Check path variable type
The method expects bookId as int, but URL provides "abc" which is not a number.
Step 2: Understand Spring Boot behavior on type mismatch
Spring Boot returns 400 Bad Request when it cannot convert path variable to required type.
Final Answer:
400 Bad Request due to type mismatch -> Option C
Quick Check:
Type mismatch in @PathVariable causes 400 error [OK]

Quick Trick: Non-numeric path variable for int causes 400 error [OK]

Common Mistakes:

Expecting 404 Not Found instead of 400
Assuming null page causes error
Thinking method returns string with invalid input

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More Spring Boot Quizzes

Consider this controller method:

Step 1: Check path variable type

Step 2: Understand Spring Boot behavior on type mismatch

Final Answer:

Quick Check:

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