Top Golang Interview Questions and Responses to Help You Prepare for Your Next Job

Are you a developer with proficiency in Golang and planning to succeed in your technical interview? Look no further, as we offer an extensive selection of handpicked Golang interview questions to help you score big in your interview and land your dream job. Golang is widely utilised by major corporations such as Google, Uber, Medium, Twitch, and Sendgrid. It is renowned for its remarkable power and innovative advantages, making it one of the most sought-after programming languages for businesses worldwide.

Can you provide further insights into Golang, and your proficiency in this programming language?

When it comes to Golang, the Hiring Manager is keen to know about your background and proficiency with this programming language. Please give a comprehensive explanation of your experience level with Golang, along with a detailed synopsis of the assignments and undertakings you have executed, utilising the language. Include specifics about your position in each project.

What is your tenure of working with Golang? Additionally, could you provide information on other technologies you have expertise in besides Golang?

You may mention your expert level with Golang both casually and professionally. For instance, if you have practised Golang for three years and utilised it professionally for four years, you can declare that you have honed your skills for seven years. Moreover, create a list of all programming languages you are fluent with and notify the hiring manager of your proficiency level in each one.

Collection of technical questions for Golang interviews

What is your approach to configuring work environments and parameters?

JavaScript Object Notation (JSON) is widely utilised as a means of setting up work environments and parameters. One of the primary advantages of JSON is that it comes preloaded with the standard library, which provides user-friendly tools for writing data structures in an easily comprehensible format. Alternatively, the Go YAML package can also be used.

Can you provide an explanation of Go Interfaces?

Answer: Go Interfaces differ from interfaces found in other programming languages. They serve as a means of defining one or multiple method signatures. To declare an interface, the ‘type’ keyword is used, followed by a name and the ‘interface’ keyword. Here is an overview of the interfaces accessible in Go:

  • An assemblage of methods
  • Type

Can you provide an explanation of syntax in the Golang programming language?

To establish an accurate specification of the syntax used in the Go programming language, the Extended Backus-Naur Form (EBNF) is employed. Demonstrating the utilisation of the EBNF can be achieved by providing examples of syntax employed in various functions.

  • The production of the [Expression] is denoted by the production name followed by “=”
  • To signify Alternative, “l” is included after the Expression Alternative
  • Term Alternative refers to Term
  • The production of Token [token “?”] Term involves the following components: Production name, L Option, l Group, and Repeat
  • The “Group” is signified by the following: “(” “Expression”
  • “Option” is represented by the following syntax: “[” Expression “] “
  • For Empty String Repetition, the syntax is: Expression “” = “”

What is the process of determining the type of an object in Go?

As opposed to other programming languages, Golang does not incorporate the concept of a class type therefore, Go does not feature the use of objects. Go provides support for various data types including bool, int16, int32, int64, float64, text among others. To identify the type of variable in Go during runtime, one can utilise any one of the following three methodologies:

  • The description of string type can be attained through the utilization of fmt
  • The reflect Package is used to determine the type of an object
  • The use of type assertions permits the identification of an object’s type

Can you provide a list of functions that can pause or stop the execution of an already running Go Routine?

There are four functions that can be utilised to pause or halt the execution of the present Go Routine:

  • runtime.Gosched: This function is executed automatically as soon as the CPU core is released and appended to the queue.
  • runtime.gopark: Until the callback function unlock within the parameter list returns false, the execution of the Go Routine is paused.
  • runtime.notesleep: With the execution of this function, the thread is put to sleep.
  • runtime.Goexit: The execution of this function will instantly suspend the running goroutine and invoke defer. However, no panic will be triggered.

What is the process followed by the Go Programming Language’s Garbage Collector?

There are various methods of garbage collection. The Mark-and-Sweep method is the garbage collector implemented in Go. It operates in two phases:

  • To initiate the Mark phase, a Stop-the-World write barrier is implemented, which accurately measures the amount of memory allocated during it. Following that, all RAM in utilisation by the application is marked. Once the marking is completed, the write barrier can be eliminated.
  • The second stage is Sweep, which takes place after new allocations are made.

What is the conventional way of encoding enums in the Go programming language?

Even though the Go programming language does not offer a pre-defined enumerated type, it can be created by utilising constants and the iota keyword. A few methods for creating enumerated types in Go are:

  • Creating a new integer type
  • Listing its iota value
  • Assigning a String function to the type

What is the significance of tags in the Golang programming language?

Field tags are primarily utilised to attach meta-information to a field that can be obtained through reflection. Usually, these tags are used to specify how a struct field is stored or retrieved from a database, but they can also be employed to include any kind of meta-information for either internal or external use. A tag string’s value is typically a sequence of key-value pairs separated by spaces.

What is the method for comparing two interfaces in Golang?

In Golang, two provided interfaces can only be compared if:

  • The interface value is either nil or
  • The fundamental type is both the same and comparable, and the underlying value of both interfaces must also be the same.

To compare two interface variables, simply use the == or != operators.

What is the default malloc threshold set by the Map Project, and is it possible to modify it?

By default, the Map Project sets the memory allocation threshold to 128 bytes. During run-time, it is feasible to modify this setting by altering the values of maxKeySize and maxValueSize within the hashmap data structure.

What determines whether the Go Runtime allocates heap memory or stack memory?

Throughout the runtime of a program, memory is allocated from the Heap. The Heap is a reservoir of memory that programmers can request and release as required. It is an assortment of memory space that can be used to store variables and data, leading to swift and effortless access. The Heap is an essential element of any program since it facilitates efficient memory resource management.

Stack is a memory allocation technique used on a transient basis. While an associated method remains in execution, data members are accessible; however, the memory is automatically released once the method is completed. If the stack’s memory allocation limit is exceeded, the Java Virtual Machine (JVM) will raise a StackOverflowError.

Interview questions for Golang programming

Can you provide an example of how to compare two structures in Golang?

To compare two structures in Golang, use the ‘==’ operator. It is crucial to ensure that the structures do not contain slices, maps or functions; otherwise, the code will not be compliant. Here is an example:

Define a struct Foo with an int type.

Define a string B.

Define an interface C.

Assign values 1, “one”, and “two” to variables A, B, and C respectively, where A is a Foo structure.

Create a Foo structure named b and assign the values 1, “one”, and “two” to variables A, B, and C respectively.

Print whether a is equal to b using the ‘==’ operator.

The result should be true.

Define a struct Bar with a []int type variable named A.

Create two variables, a and b, where each is a Bar structure with an empty integer slice named A.

Print whether a is equal to b using the ‘==’ operator.

Printing whether a is equal to b using ‘==’ operator is invalid since a and b are structs that contain an integer slice.

When the underlying data types of two interfaces are both of “simple” and identical types, it is possible to compare them using the “==” operator. Nevertheless, if the data types are different, attempting to do so may cause the code execution to panic or crash.

Declare two variables, ‘a’ and ‘b’, both of interface type.

Assign a value of 10 to both variables a and b.

Print whether a is equal to b using the ‘==’ operator.

The result should be true.

Assign the value of a to a new integer slice, []int1. Then, assign the value of b to another new integer slice, []int2.

How does Go provide an alternative to the ternary operator in C? Provide an example to illustrate.

Go does not have a direct equivalent of the ternary operator in C. Rather, use an if-else block. For example:

Package main

importing (

“fmt” package


(No rephrasing needed)

The main() function

Declare three variables, x and y as integers, and result also as an integer.

x = 5

y = 10

If x is greater than y, then:

Assign the value of outcome to x.

} else {

Assign the value of outcome to y.


Print the value of result using fmt.Println()


Result: 10

How to determine if two slices are equal in Golang?

To determine the equality of two slices in Golang, it is important to check each element in the slice by using a loop as the equality is not pre-defined. However, when comparing values of type []byte, it is crucial to use the equal function to ensure accurate results.

Create a boolean function with two slice parameters a and b of Type.

If the length of slice a does not equal the length of slice b, then:

Return a value indicating inequality.

End of the function.

If i is defined as the range of slice a:

If the value of slice a at index i does not equal the value of slice b at index i, then:

Return a value indicating inequality.

End of the iteration loop.

End of the function.

Returning a boolean value indicating equality.

End of the function.

Is Golang a viable option for securing a good job?

If you have expertise in Golang programming language and possess the required skillset to become part of our vast talent pool of over 1.5 million software developers, Works can assist you in securing highly lucrative and progressive job opportunities with leading US-based organizations. Check out our Apply for Jobs page to begin your application process now!

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