Golang - Interview Questions and Answers

Go programming language is designed by Robert Griesemer, Rob Pike, and Ken Thompson. It is developed at Google Inc. in 2009.

1. Basic type: Numbers, strings, and booleans come under this category.
2. Aggregate type: Array and structs come under this category.
3. Reference type: Pointers, slices, maps, functions, and channels come under this category.
4. Interface type

No support for operator overloading.

No support for method overloading.

No support for pointer arithmetic.

Yes

To define a structure, you must use type and struct statements. The struct statement defines a new data type, with more than one member for your program. type statement binds a name with the type which is struct in our case.
The format of the struct statement is this:

type struct_variable_type struct {
member definition;
member definition;
…
member definition;
}

Go is a really fast language. Because Go is compiled to machine code, it will naturally outperform languages that are interpreted or have virtual runtimes. Go programs also compile extremely fast, and the resulting binary is very small. 

A workspace contains Go code. A workspace is a directory hierarchy with three directories at its root.

• "src" directory contains GO source files organized into packages.
• "pkg" directory contains package objects.
• "bin" directory contains executable commands

The parameters sent to the function at calling end are called as actual parameters while at the receiving of the function definition called as formal parameters.

It has a lightweight testing framework consists of the go test command and the testing package.

To write a test you have to create a file with a name ending in _testing. Go which contains functions named TestXXX with signature func (t *testing.T).  The test framework runs each such function.

The available built-in-support in GO includes

• Container: container/list , container/heap
• Web Server: net/http
• Cryptography: Crypto/md5 , crypto/sha1
• Compression: compress/ gzip
• Database: database/sql