What is JSON serialization?
💡 Concept: JSON Serialization
JSON serialization converts objects into JSON format, a lightweight and widely-used data interchange format.
📘 Quick Intro
Enables easy data exchange between systems and human-readable storage.
🧠 Analogy
Like translating a message into a universally understood language.
🔧 Technical Explanation
- Supported by libraries like System.Text.Json and Newtonsoft.Json.
- Serializes public properties by default.
- Supports customization with attributes and converters.
- Widely used in web APIs and configuration files.
- Facilitates interoperability between diverse systems.
🎯 Use Cases
- ✅ Web API data exchange.
- ✅ Configuration and settings storage.
- ✅ Caching serialized data.
- ✅ Cross-platform communication.
💻 Code Example
// Using System.Text.Json for JSON serialization
var person = new Person { Name = ""Alice"", Age = 25 };
string json = JsonSerializer.Serialize(person);
var deserializedPerson = JsonSerializer.Deserialize<Person>(json);
public class Person {
public string Name { get; set; }
public int Age { get; set; }
}
❓ Interview Q&A
Q1: What is JSON serialization?
A: Converting objects to JSON format.
Q2: Name popular JSON libraries in C#.
A: System.Text.Json, Newtonsoft.Json.
Q3: What does JSON stand for?
A: JavaScript Object Notation.
Q4: Is JSON human-readable?
A: Yes.
Q5: Can JSON serialize private fields?
A: No, by default only public properties.
Q6: What attribute customizes JSON serialization?
A: JsonPropertyName.
Q7: Is JSON widely used?
A: Yes, especially in web APIs.
Q8: Can JSON handle complex objects?
A: Yes, with converters.
Q9: What namespace contains JsonSerializer?
A: System.Text.Json.
Q10: How to deserialize JSON to an object?
A: Use JsonSerializer.Deserialize
📝 MCQs
Q1. What is JSON serialization?
- Converting objects to XML
- Converting objects to JSON
- Encrypting data
- Compressing data
Q2. Name a JSON library in C#.
- Newtonsoft.Json
- System.Text.Json
- NUnit
- Moq
Q3. What does JSON stand for?
- JavaScript Object Notation
- Java Serialized Object Notation
- Java Standard Object Notation
- JSON Object Notation
Q4. Is JSON human-readable?
- No
- Yes
- Sometimes
- Rarely
Q5. Can JSON serialize private fields?
- Yes
- No
- Sometimes
- Always
Q6. What attribute customizes JSON property name?
- JsonIgnore
- JsonPropertyName
- JsonConverter
- JsonInclude
Q7. Is JSON widely used?
- No
- Yes
- Rarely
- Sometimes
Q8. Can JSON serialize complex objects?
- No
- Yes
- Sometimes
- Rarely
Q9. Namespace for JsonSerializer?
- System.IO
- System.Text.Json
- Newtonsoft.Json
- System.Net
Q10. How to deserialize JSON?
- Deserialize
- JsonSerializer.Deserialize<T>()
- Parse
- Convert
💡 Bonus Insight
JSON serialization is the backbone of modern web APIs and cross-platform data exchange.
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