Golang interview questions and answers in 2023

This is a common Golang interview question. Go Packages (abbreviated pkg) are simply directories in the Go workspace that contain Go source files or other Go packages. Every piece of code created in the source files, from variables to functions, is then placed in a linked package. Every source file should be associated with a package.

A string literal is a character-concatenated string constant. Raw string literals and interpreted string literals are the two types of string literals. Raw string literals are enclosed in backticks (foo) and contain uninterpreted UTF-8 characters. Interpreted string literals are strings that are written within double quotes and can contain any character except newlines and unfinished double-quotes.

This is a common golang interview question. Golang uses the following types:

• Slice
• Struct
• Pointer
• Function
• Method
• Boolean
• Numeric
• String
• Array
• Interface
• Map
• Channel

A Goroutine is a function or procedure that runs concurrently with other Goroutines on a dedicated Goroutine thread. Goroutine threads are lighter than ordinary threads, and most Golang programs use thousands of goroutines at the same time. A Goroutine can be stopped by passing it a signal channel. Because Goroutines can only respond to signals if they are taught to check, you must put checks at logical places, such as at the top of your for a loop.

With custom testing suites, Golang provides automated testing of packages.

Create a new suite by writing a file that ends with _test.go and contains a TestXxx function, where Xxx is substituted with the name of the feature you're testing. A method that tests login capabilities, for example, would be called TestLogin. The testing suite file is then included in the same package as the file to be tested. The test file will be skipped during the usual execution but will run when the go test command is entered.

This is a trick golang interview question because Golang does not support classes, hence there is no inheritance. However, you may use composition to imitate inheritance behavior by leveraging an existing struct object to establish the initial behavior of a new object. Once the new object is created, the functionality of the original struct can be enhanced.

There is only one looping construct in Go: the for loop. The for loop is made up of three parts that are separated by semicolons:

• Before the loop begins, the Init statement is run. It is frequently a variable declaration that is only accessible within the scope of the for a loop.
• Before each iteration, the condition statement is evaluated as a Boolean to determine if the loop should continue.
• At the end of each cycle, the post statement is executed.

This is an important Golang interview question. Go is an attempt to create a new, concurrent, garbage-collected language with quick compilation and the following advantages:

• On a single machine, a big Go application can be compiled in a matter of seconds.
• Go provides an architecture for software development that simplifies dependency analysis while avoiding much of the complexity associated with C-style programs, such as files and libraries.
• Because there is no hierarchy in Go's type system, no work is wasted describing the relationships between types. Furthermore, while Go uses static types, the language strives to make types feel lighter weight than in traditional OO languages.
• Go is fully garbage-collected and supports parallel execution and communication at a fundamental level.
• Go's design presents a method for developing system software on multicore processors.

The compiler must interpret the type of variable in a dynamic type variable declaration based on the value provided to it. The compiler does not consider it necessary for a variable to be typed statically.

Static type variable declaration assures the compiler that there is only one variable with the provided type and name, allowing the compiler to continue compiling without having all of the variable's details. A variable declaration only has meaning when the program is being compiled; the compiler requires genuine variable declaration when the program is being linked.

This is a popular Golang interview question. The sender will block on an unbuffered channel until the receiver receives data from the channel, and the receiver will block on the channel until the sender puts data into the channel.

The sender of the buffered channel will block when there is no empty slot on the channel, however, the receiver will block on the channel when it is empty, as opposed to the unbuffered equivalent.