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Advanced Java Quiz Day 61
Question 1
What library is used by default in Spring Boot to handle JSON?
Gson
Jackson
JSON.simple
FastJSON
Question 2
Which Spring annotation is used to automatically convert a Java object to JSON in the response?
@ResponseBody
@RequestBody
@JsonSerialize
@PathVariable
Question 3
Which annotation in Jackson changes the JSON field name?
@JsonIgnore
@JsonInclude
@JsonProperty
@JsonField
Question 4
What happens if you return a Java object from a @RestController method?
It will be ignored
It will be automatically converted to JSON
It will be converted to XML
It will throw an error
Question 5
Which annotation is used to ignore a field during JSON serialization?
@JsonIgnore
@JsonProperty
@JsonInclude
@JsonSkip
Question 6
What does @RequestBody do?
Converts JSON from request into a Java object
Sends a file in the response
Maps URL variables
Converts a Java object to JSON
Question 7
If you use spring-boot-starter-web, which JSON library is included by default?
Jackson
Gson
JSON-P
org.json
Question 8
In a REST API, to return only non-null fields in JSON, you use:
@JsonIgnore
@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonProperty
@JsonSkip
Question 9
What is the main difference between @Controller and @RestController in Spring?
@RestController returns JSON directly
@RestController is faster
No difference
@Controller is for APIs
There are 9 questions to complete.