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JSON

Structure, parsing, serialization, schema validation.

26 questions
SyntaxParsingSerializationSchemaJSON vs XML

Sample Questions (26 live)

JSON vs XMLEasy

Why did JSON largely replace XML for APIs?

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BasicsEasy

What is JSON?

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BasicsEasy

Why is JSON so widely used?

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JSON vs XMLEasy

What are the key structural differences between JSON and XML?

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SyntaxEasy

What data types does JSON support?

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SyntaxEasy

What are the syntax rules of valid JSON?

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Objects & ArraysEasy

What is the difference between a JSON object and a JSON array?

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Objects & ArraysEasy

How do nested JSON objects work?

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Objects & ArraysEasy

How are JSON arrays used and what can they contain?

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Objects & ArraysMedium

How do you safely access values in nested JSON?

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Objects & ArraysMedium

What does it mean to flatten JSON and when would you do it?

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ParsingEasy

What is JSON parsing?

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SerializationEasy

What is the difference between serialization and deserialization?

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ParsingMedium

What are common JSON parsing errors and their causes?

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ParsingMedium

How do you handle invalid or malformed JSON?

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SerializationEasy

What is pretty-printing JSON and how do you do it?

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REST APIsEasy

How is JSON used in REST APIs?

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REST APIsEasy

What is the difference between request JSON and response JSON?

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REST APIsEasy

How do HTTP status codes work together with JSON responses?

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ValidationMedium

How do you validate incoming JSON?

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SchemaMedium

What is JSON Schema and why is it useful?

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PerformanceHard

How do you handle large JSON payloads efficiently?

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SecurityMedium

What are JSON security best practices?

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AdvancedMedium

What is the difference between JSON and BSON?

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AdvancedMedium

How does JSON structure a JWT (JSON Web Token)?

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AdvancedMedium

What are common JSON interview scenarios and how do you approach them?

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