Golang

Question 1

What is GO

Answer 1

Statically typed, compiled language. (Code is translated directly into machine code resulting in fast execution and performance)

Question 2

GO Key Features

Answer 2

• Concurrency
• Garbage collection
• Strong standard library
• Cross platform

Question 3

GO: Garbage Collection

Answer 3

Automatically manages memory, freeing developers from manual memory management tasks and reducing the risk of memory leaks

Question 4

GO Standard Library

Answer 4

Includes packages for handling common tasks like I/O operations, web servers, and data serialization

Question 5

SQLC

Answer 5

Generates type safe GO code from SQL queries

• Works by taking SQL queriers written by dev and converts it to Go code which includes methods to execute those queries

Question 6

pgx

Answer 6

PostgreSQL driver and toolkit for GO

• PostgreSQL client library for Go
• provides functionalities for low level and high level interactions
• allows you to connect to postgreSQL DB and execute a query

Question 7

Gin

Answer 7

Web framework in Go used to build high performance HTTP web apps and APIs

• known for its speed and efficiency which can handle large number of requests with minimal overhead

Question 8

tx

Answer 8

Abbreviation for transaction

• represents an instance of a DB transaction
• allows for grouping multiple DB operations into a single unit of work that can be committed or rolled back as a while

Question 9

BindJSON

Answer 9

Binds JSON data from an HTTP request body to a GO struct

• it reads the JSON payload from the request and populates the fields of the provided struct with the corresponding data

Question 10

Key features of Gin

Answer 10

• fast performance
• routing (provides flexible routing system)
• middleware (allows you to execute code before or after request handling)
• JSON handling (binding JSON request payloads to GO structs and rendering JSON responses)
• Error handling

Question 11

GO Struct

Answer 11

Data type that groups together variables (fields) under a single name

• Each field can have a diff type and are used to represent a collection of related data
• Purpose: represent real world entities by grouping related data

Question 12

GO Interface

Answer 12

A type that specifies a contract of methods that a type must implement to satisfy the interface. It doesn’t hold data but describes behavior.

• Purpose: defines a set of methods that a type MUST implement allowing diff types to be used interchangeably if they satisfy the interface

Question 13

How SQLC works

Answer 13

1. Write SQL
2. Generate code, where go types, structs and query functions are created
3. Use in Go

Question 14

go_struct_tags

Answer 14

referenced in sqlc.yaml file

• Allows you to customize the Go struct tags for fields generated by sqlc
• Control how struct fields are processed when encoding, decoding or interacting with DBs

ex: you might want tags for DB column mapping, JSON serialization etc

Question 15

Interface

Answer 15

A type that defines a set of methods (behavior) but doesn’t provide the implementation for the methods

• Defines what methods a type must have to satisfy the interface

Question 16

*gin.Context

Answer 16

in Gin is used to manage HTTP requests and responses, route parameters and middleware in web apps