Go Programming Language interview questions

Go Programming Language

Need some help when planning your career? Need to enhance and develop your career in the Go language? You are in the correct place. In today’s time, there is quite tough competition in the market to crack the interview and get a job in an MNC. Go programming language is designed with systems programming in mind. It is strongly and statically typed which provides inbuilt support for the garbage collection and supports concurrent programming.

Here are some of the questions, which are asked in Go programming interview and which will give you a head begin. You never know you might get these set of questions in your next Go programming interview.

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Go Programming Language

Typecasting is a one, which allows programmers to change an entity from one type to another. Or in another way typecasting is a method to convert a variable from one data type to another one.

A pointer is a kind of variable which stores the memory address of another variable. Various programming tasks are performed quite easily with pointers and various other functions such as call by reference which cannot be achieved without using pointers. Any variable or constant you must declare it to a pointer before you can use it to store any variable address.
A function is a group of statements, which performs a task together. You can divide your code into various functions.GO programming supports unidentified or anonymous functions, which can act as function closures.

“L-value” known as a memory location recognizes an object. L-value may show up as either left hand or right-hand side of an assignment operator (=). L-value frequently represents as an identifier.

“R-Value” represents a data value that is stored at some address in memory. An r-value is an articulation that can’t have a value assigned to it which means r-value can show up on the right-hand side but not on the left-hand side of a task operator(=).

In GO language, Maps is an unordered collection of the keys and its associated values. They are quite useful for looking up values fast. A map is like an array instead of integer index; you can have string keys or other data types to represent keys.
A variable is one of the storage areas where the programs can manipulate. Each variable in GO programming has a specific type which is used to determine the size and layout of the variable’s memory. So the default value of a local variable in GO programming language is “0”.
GO has various built-in supports features in it, which help to perform it appropriately:
  • Database
  • Compression
  • Web Server
  • Container list and heap
 Goroutines are the methods and functions that run concurrently with another methods or functions. Goroutines can be considered as a lightweight thread. These are multiplexed to a fewer number of OS threads. There might be only one thread in a program with thousands of goroutines.
Go provides a mechanism, which is called channel that is utilized to share data between goroutines. When you execute a concurrent activity as a goroutine a resource or data is required to share between goroutines, channel acts as a pipe between the goroutines and gives them a mechanism that guarantees a synchronous exchange. There are two types of channels based on their actions:
  1. Unbuffered Channels: It is used to behave in a synchronous communication between goroutines.
  2. Buffered Channels: It is used to perform synchronous communication
Following details is the way how we can distribute various tasks in Go to different machines:
  1. Get the Dependencies
  2. Writing tasks and worker
  3. Requesting/Sending tasks
  4. Make sure server is running
Go supports two syntaxes for string literals. With regular quotes, special sequences like newlines are interpreted as actual newlines. Strings literal deserves special consideration because they are implemented very separately in Go as compared with other languages. Strings literals are placed between double quotes “….”. Default encodes strings in Go, and moreover, UTF-8 supports ASC11 character set. So there is no need to be worried about encoding. String literal can improve a program’s readability.
No there is no way to specify a default value. This is completed on purpose to enhance readability at the cost of little more time on the writer’s end. The proper approach of having a “default” is to have a new function, which provides that default to the more function. By applying this, your code becomes clearer on your intent.
The GOPATH environment variable indicates the specific location of your workspace. That is the place you find the Go devices, where you create and where you introduce 3rd part packages and binaries. If no GOPATH is set, it is pretended to be user profile on windows and home on UNIX systems.
There might be a circumstance when you have to execute a block of code several numbers of times. Programming languages give different control structures that take into account more complicated execution ways.
A loop statement enables us to execute a statement or group of statements various times and following is the general type of a loop statement in the majority of the programming languages.
  • Loop Control Statements:Loop control statements change execution from its normal sequence. At the point when execution leaves its scope, every programmed object that was made in that scope is diminished.
  • The Infinite Loop: A loop turns into an infinite loop if its condition never turns out to be false. Loop is generally utilized for this reason. You can make an endless loop by remaining the conditional expression empty.
You should not use global variables at all. Unless there is a solid reason for that. And you should not use goroutines just for the sake of it, even though go ones are quite cheap they can have side effects and complicate the program needlessly.