Question 1

Which function allows encoding a Go struct into JSON?

Accepted Answer

json.Marshal encodes a Go struct into JSON bytes. This function reads struct tags to customize serialization (renaming, field omission). For streaming to io.Writer, using json.NewEncoder avoids creating an intermediate buffer in memory.

Question 2

Which function allows decoding JSON into a Go struct?

Accepted Answer

json.Unmarshal decodes JSON bytes into a Go struct. A pointer to the target struct must be passed for data to be correctly written. For streaming from io.Reader, json.NewDecoder is more efficient as it avoids loading all JSON into memory.

Question 3

Which JSON struct tag allows renaming a field during serialization?

Accepted Answer

The json:"custom_name" tag allows renaming a field during JSON serialization. For example, a UserID field can become user_id in JSON. This is useful for respecting naming conventions (snake_case in JSON vs CamelCase in Go).

JSON Encoding

Which function allows encoding a Go struct into JSON?

Câu trả lời

Which function allows decoding JSON into a Go struct?

Câu trả lời

Which JSON struct tag allows renaming a field during serialization?

Câu trả lời

Which JSON struct tag completely excludes a field from serialization?

Which JSON struct tag allows omitting a field if its value is empty?

Các chủ đề phỏng vấn Go khác

Go Basics

Go Data Structures

Go Interfaces

Error Handling

Goroutines Basics

Channels

Go Modules

HTTP Server

HTTP Client

database/sql

Context Package

Testing

Concurrency Patterns

Sync Primitives

Go Web Frameworks

REST API Design

gRPC

Reflection

Memory Management

Performance Optimization

Generics

Go Design Patterns

Microservices

Security & Authentication

Docker & Containerization

Kubernetes Basics

Advanced Go

CLI Development

Nắm vững Go cho lần phỏng vấn tiếp theo