Are you looking for Go interview questions and answers? Don’t worry! You are at the right place. In this blog, you can find the top 40 Go interview questions and answers compiled by MindMajix content experts. These hand-picked questions and answers will help you to breeze through your Go interviews. Yes! Read through the Go interview questions and answers from top to bottom and crack your Go interview effortlessly.
Go or Golang is one of the open-source programming languages with which you can develop simple and scalable applications. It is the language one can learn quickly and develop applications. Top companies like Google, Meta, Netflix, Uber, etc., use the Go language for developing their applications.
As Go is increasingly used across big companies, the demand for Go developers in the job market is high. That’s why it is a great choice if you aspire to pursue a Go career. If you are thorough in Go interview questions, you can easily clear Go interviews and land your dream job with attractive packages.
We offer you the top 40 Golang interview questions and answers in this blog to help you ace your Go interviews. We have divided the questions into two sections for freshers and experienced. You can jump into the section directly based on your expertise level.
For ease of learning and understanding, we have divided these questions into 2 categories they are:
Go is also known as GoLang, it is a general-purpose programming language designed at Google and developed by Robert Griesemer, ken Thomson and Rob Pike. It is a statistically typed programming language used for building fast and reliable applications.
Inclined to build a profession as GO Developer? Then here is the blog post on, explore GO Training |
Go is the short form of Golang. It is an open-source as well as general-purpose programming language. Go is an easy-to-learn language with a built-in concurrency and standard library. It is also a statistically-typed language that helps to build reliable applications. It is the best language that we can use to develop scalable web applications, network services, and command-line tools.
The compiler needs to interpret the variable type in the dynamic variable declaration. It is usually done based on the value passed to the compiler.
Go programs are usually organized into packages. A package is nothing but a collection of source files in the same directory. These files are compiled together. The main thing is that variables, functions, and constants are stored in one source file. The files are visible to other files in the same package.
Go programs start with the main package. We can use the import commands for importing the ‘math/rand’ and ‘fmt’ packages.
This declaration ensures the compiler that there is only one variable with the given type and name. This approach allows the compiler to continue the compilation without needing variable details.
'*' and '&' operators are used in Golang. '*' is the dereferencing operator that we use to declare a pointer. Also, we use this operator to access the value stored at the address. When it comes to the '&' operator, it is known as the address operator, and we use this operator to get the address of a variable.
In the Go programming, constants are declared with the const keyword. A constant can be a character, Boolean, string, or numeric value. Numeric constant is the type of constant that is an untyped constant. Besides, it consists of high-precision values.
Pointers represent the addresses of objects stored in the memory. They are typically variables. More to the point, pointers are known as special variables in Golang. Pointers can have different data types like ‘int' and 'string'. Note that the memory addresses typically are stored in pointers in hexadecimal formats.
Jotted down are the different Golang operators.
Know that there are four data types in Golang.
Golang variable scope is nothing but a part of the code. This is where you can access and modify specified variables. There are two categories of scope variables: local variables and global variables. Local variables are usually declared inside a function or block of a code, whereas global variables are declared outside of a function or block of a code.
A Golang method is a function but has a special receiver argument. Golang methods are typically similar to go functions. Golang methods have receiver arguments. The method can receive the receiver's properties using the receiver argument. Note that the receiver can be either struct type or non-struct type.
Yes. Golang is a case-sensitive language.
Golang workspace is usually a directory hierarchy of Go programs. A workspace consists of three subdirectories, as mentioned below.
Following are the key advantages of Golang.
Related Article: Golang Tutorial for Beginners |
Here are the reasons why Golang is so popular.
The ‘init’ function is usually called at the beginning of the execution time. We use the ‘init’ method to add initialization logic into the package.
Below are the different decision-making statements of Golang.
Slice is a lightweight data structure and supports variable length. It is dynamically sized and flexible. A slice formed with two indices and separated by a colon.
Below is the representation of the Golang slice.
a [low: high]
It is used to find standard libraries. In other words, it is a variable used to locate Go SDK. It is always set to the installation directory. We use this variable to determine the root of a workspace.
They are lightweight threads widely used in Go concurrent programming. A thread is a function that executes in parallel with the rest of the program. We use the ‘go’ keyword to invoke a function as a go routine.
Structures in Golang help to combine items of various types into a single type. If you have stored a player's details, you can create two variables with the player's name and age. If you want to store the details of an entire team, you need to create variables for all team members.
type person sruct {
name string
age int
height int
}
We use the ‘goto’ statement to assign control to the labeled statement. In other words, this statement makes an unconditional jump from the goto to a labeled statement. It happens in the same function.
The syntax for the goto statement is given as follows:
goto label;
.
.
Label : statement;
The break statement breaks a loop immediately after it is executed and continues to execute the statement next to the break statement. A break statement is also used to terminate a case in a switch statement.
The syntax for a break statement in Go is defined as below:
break;
A channel is nothing but a communication medium with which a goroutine communicates with other goroutines. It is a pipeline through which goroutines can share values. Channels are bidirectional so that you can send and receive values in the same channel. The main thing is that goroutines can send and receive values only when the opposite end is ready.
Golang supports implicit as well as explicit type conversion and type assertion. This conversion is also known as automatic type conversion. It occurs automatically when arithmetic operations occur on values with different data types.
The switch statement is essentially a multiway branch record. This statement helps to assign the execution to various parts of code based on the use of the expression. There are two types of switch statements: expression switch and type switch.
We apply an expression switch to dispatch execution to different parts of codes based on the phrase's value. We apply a type switch when match types are required.
In a way, the select statement is similar to the switch statement. The case statement indicates communication in the select statement.
Golang doesn’t support inheritance property. At the same time, it provides embedding, composition, and interfaces to support polymorphism property and allows code reuse.
We use the ‘go test’ command to automate the execution of any form’s function.
We can use a type switch to check the variable type at runtime.
CGo enables Go packages to invite C code.
[ Related Article: Golang vs Java ]
We use the ‘==’ operator to compare two structures. The important thing is that they shouldn’t contain any maps, functions, or slices.
Go doesn’t support any optional parameters. Also, it doesn’t support method overloading.
No. Golang doesn’t have exceptions. Error values are used to indicate the abnormal states in Golang.
Buffered channels make asynchronous communication. Goroutines are not used to send and receive operations.
On the other hand, unbuffered channels support synchronous communication. We can use these channels for sending as well as receiving data.
rvalue – This value appears on the right side of the assignment operator. It represents a data value stored at some address in memory.
lvalue – It exists on either the right-hand or left-hand side of the assignment operator.
Anonymous functions are called function closures. We use them in dynamic programming.
A Rune is also called a Codepoint. It is an integer type that alias for the int32 type. The Rune represents a single Unicode character. Rune literals can be represented by enclosing in single quotes.
Map lookup needs an equality operator that slices don’t adopt. Equality is not well-defined on slices.
We can increase the performance of Golang programs
Go and Golang are used by IT professionals interchangeably. However, the language is mostly called the Go language.
Yes! Go comes with an extensive library known as runtime. This library implements stack management, garbage collection, and other key features of the Go language.
It is possible to link Go and C++ codes. However, linking is inefficient since it affects memory safety and stack management.
Go language typically uses simpler and more modern syntax than C++. Go has built-in support for concurrency through goroutines. Besides, Go has a smaller standard library than C++.
Yes and No. Go comes with types and methods which define Go as an object-oriented language. At the same time, other object-oriented languages have no type hierarchy.
It's time to wrap! We hope the top 40 Go interview questions and answers have benefited you. This blog might have enhanced your expertise in the Go language to the next level. The questions and answers will help you to crack your Go interviews.
If you want to explore more about the Go language, you can sign up for the Go course in MindMajix and gain certification. It will help boost your Go programming knowledge and ace your Go interviews effortlessly. You can use the commands section below for suggestions or to add more questions.
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Ravindra Savaram is a Technical Lead at Mindmajix.com. His passion lies in writing articles on the most popular IT platforms including Machine learning, DevOps, Data Science, Artificial Intelligence, RPA, Deep Learning, and so on. You can stay up to date on all these technologies by following him on LinkedIn and Twitter.
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