Golang Programming Interview Questions

• Q1.

  What is GO?

  Posted by Sharad Jaiswal

  It is an open source programming language makes the programmers build a simple, reliable and efficient software easily. The programs are developed from the packages, whose properties allow efficient management of dependencies.

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• Q2.

  What are the structures of syntax in GO?

  Posted by Sharad Jaiswal

  In GO programming language the syntaxes are specified using EBNF (Extended Backus-Naur Form)

  • Production = production name “=” [Expression]
  • Expression = Alternative {“1” Alternative}
  • Alternative = Term {Term}
  • Term = Production name token [“….” token]1 Group 1 Option 1 Repetition
  • Group = “(“Expression”)”
  • Option = “[“Expression”]”
  • Repetition = “{“Expression”}”

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• Q3.

  Explain workspace in GO?

  Posted by Sharad Jaiswal

  A code has to be kept inside a workspace GO. A workspace is defined as a directory hierarchy with three directories.

  • pkg contains package objects.
  • the bin contains executable files
  • src contains GO source file arranged systematically into packages.

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• Q4.

  Can you perform testing in GO? Explain how can do it?

  Posted by Sharad Jaiswal

  Yes, it has a testing framework which comprises of the go test command and the testing package.
  In order to write a test, you are required to create a file whose name ends with _testing. Go contains function named TestXXX with the signature func(t*testing.T).

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• Q5.

  State the advantages of GO?

  Posted by Sharad Jaiswal

  Following are the advantages of GO:

  • Functions are first-class objects in GO.
  • Go compiles very quickly.
  • Strings and Maps are built into the language.
  • Go supports concurrency at the language level.
  • Go has garbage collection.

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• Q6.

  Mention the built-in support in GO?

  Posted by Sharad Jaiswal

  Following are the available built-in- support in GO

  • Web Server: net/http
  • Database: database/sql
  • Container: container/list, container/heap
  • Cryptography: Crypto/md5, crypto/sha 1
  • Compression: compress/gzip

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• Q7.

  Can you explain GO Interfaces?

  Posted by Sharad Jaiswal

  The GO interfaces are a way to specify the behavior of the objects.
  It is created by using the “type” word, followed by a name and the keyword interface.
  The interface is specified as:

  • A set of methods
  • And also referred to as type.

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• Q8.

  Explain the packages in GO program?

  Posted by Sharad Jaiswal

  The Go program is made up of packages.
  The program begins running in the package main and this program is using the packages with import paths “fmt” and “math/rand”.

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• Q9.

  Explain string types?

  Posted by Sharad Jaiswal

  The string types represent the set of string values, and the string values are the sequence of bytes.
  And, once a string is created it is impossible to change it.

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• Q10.

  Explain how arrays in GO work differently than in C?

  Posted by Sharad Jaiswal

  • If you pass an array to a function, it will receive the copy of the array and not the pointer to it.
  • Arrays are values, assigning one array to other copies all the elements.
  • The size of an array is part of its type The type int[20] and int[10] are distinct.

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