Golang interview questions and answers in 2023
If you want to work as a successful Golang developer for a top Silicon Valley firm or build a team of talented Golang developers, you've come to the right spot. We've carefully compiled a list of Golang developer interview questions for your Golang interview to give you an idea of the kind of Golang interview questions you can ask or be asked.
Golang, also known as Go, is a relatively new programming language that was published in 2012 by Google developers Robert Griesemer, Rob Pike, and Ken Thompson.
Whether you are a candidate actively looking for Golang interview preparation or a recruiter looking for Golang developers, the following list of Golang interview questions will be of great use for you.
Table of contentsGolang interview questions and answers (10)
Golang interview questions and answers
What are Golang packages?
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.
Explain string literals.
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.
What data types does Golang use?
This is a common golang interview question. Golang uses the following types:
What is a Goroutine and how do you stop it?
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.
What are the steps of testing packages with Golang?
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.
How will you perform inheritance with Golang?
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.
What are the looping constructs in Go?
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.
What are some benefits of using Go?
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.
What are dynamic and static types of declaration of a variable in Go?
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.
Distinguish unbuffered from buffered channels.
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.
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The above list of Golang interview questions will be an important part of your Golang interview preparation. These Golang interview questions will assist you in solving similar queries or generating new ones. A Golang interview, on the other hand, would not consist solely of these technical Golang interview questions. A Golang interview may also include questions regarding a person's social and life abilities. This allows the recruiter to determine whether the individual can work in difficult situations while also assisting their coworkers. As a recruiter, finding someone who gets along with the rest of the team is critical.
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