Why might a Spring Boot controller method with multiple @PathVariable parameters fail if the URI template variables are not explicitly named in the annotations?
hard📝 Conceptual Q10 of 15
Spring Boot - REST Controllers
Why might a Spring Boot controller method with multiple @PathVariable parameters fail if the URI template variables are not explicitly named in the annotations?
ABecause @PathVariable requires all parameters to be of type String.
BBecause Spring Boot matches parameters by name and needs explicit names if parameter names differ from URI variables.
CBecause URI templates cannot have more than one variable.
DBecause @PathVariable only works with primitive types.
Step-by-Step Solution
Solution:
Step 1: Understand parameter matching rules
Spring Boot matches @PathVariable parameters to URI variables by name by default.
Step 2: Identify need for explicit naming
If parameter names differ from URI variable names, explicit names must be provided in @PathVariable annotations.
Step 3: Eliminate incorrect options
Type restrictions and URI template limits are not reasons for failure here.
Final Answer:
Because Spring Boot matches parameters by name and needs explicit names if parameter names differ from URI variables. -> Option B
Quick Check:
Parameter and URI variable names must align or be specified [OK]
Quick Trick:Name parameters or specify names in @PathVariable [OK]
Common Mistakes:
Thinking type must always be String
Believing URI templates allow only one variable
Assuming @PathVariable works only with primitives
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