Question 1

What is the correct syntax to declare a variable in Go?

Accepted Answer

In Go, there are three main ways to declare a variable: var x int (explicit declaration with type), var x = 10 (declaration with type inference), and x := 10 (short declaration with inference, only inside functions). The short form := is most commonly used for local variables as it is concise and idiomatic.

Question 2

What is the zero value of an int variable in Go?

Accepted Answer

In Go, all variables are initialized with a zero value by default if no value is provided during declaration. For numeric types (int, float64), the zero value is 0. For booleans it's false, for strings it's an empty string, and for pointers it's nil. This behavior ensures there are never uninitialized variables in Go.

Question 3

What is the difference between var x int and x := 0 in Go?

Accepted Answer

var x int declares a variable with zero value (0) and an explicit type, while x := 0 uses short declaration with type inference. The short declaration := can only be used inside functions, while var can be used at package level. The := form is preferred for local variables as it is more concise and idiomatic.

Go Basics

What is the correct syntax to declare a variable in Go?

Answer

What is the zero value of an int variable in Go?

Answer

What is the difference between var x int and x := 0 in Go?

Answer

How to declare a constant in Go?

What are the basic numeric types in Go?

Other Go interview topics

Go Data Structures

Go Interfaces

Error Handling

Goroutines Basics

Channels

Go Modules

HTTP Server

HTTP Client

JSON Encoding

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

Master Go for your next interview