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Learn JSON With Jackson – Module 2 Lesson 3 – Quiz

Last updated: September 4, 2025

Written by: komal

Learn JSON With Jackson
Lesson 3: Handling Unknown Properties
Learn JSON With Jackson – Module 2 Lesson 3 – Quiz

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Question 1 of 4

1. Question

What happens by default when Jackson encounters an unknown property during deserialization?

It ignores the property silently
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It throws an IllegalArgumentException
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It throws an UnrecognizedPropertyException
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It adds the property to a default map of extras
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Question 2 of 4

2. Question

Which ObjectMapper configuration prevents Jackson from failing when unknown properties are present?

SerializationFeature.INDENT_OUTPUT, true
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SerializationFeature.FAIL_ON_EMPTY_BEANS, false
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DeserializationFeature.ACCEPT_UNKNOWN_PROPERTIES, true
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DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false
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Question 3 of 4

3. Question

How does the @JsonIgnoreProperties(ignoreUnknown = true) annotation affect deserialization?

It ignores all fields in the JSON, making the result always empty
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It ignores only unknown fields for the annotated class
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It disables serialization for null properties
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It throws an exception when unknown fields are present
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Question 4 of 4

4. Question

What is the purpose of the @JsonAnySetter annotation?

To capture unknown properties that were passed during deserialization
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To enforce that all unknown properties must be excluded
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To ignore all properties not defined in the Java class
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To override the default property naming strategy
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