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Calsoft Golang Developer Interview Questions and Answers
Q1. different types of channels in go and where we can use these channels
Types of channels in Go and their use cases
Buffered channels: Allow multiple senders to send data without blocking until the buffer is full
Unbuffered channels: Synchronize goroutines by blocking sender until receiver is ready
Bidirectional channels: Allow both sending and receiving data
Receive-only channels: Restrict channel to only receive data
Send-only channels: Restrict channel to only send data
Q2. how you create own package,explain your project
To create a package, define a new directory and add a file with package name and functions. My project is a web scraper.
Create a new directory with package name
Add a file with package name and functions
Import the package in main program
Use the functions in the package
Example: package name - scraper, functions - scrapeWebsite(url string) string
Example usage: import 'scraper', scraper.scrapeWebsite('https://example.com')
Q3. what is concurrency and how we can achieve using go.
Concurrency is the ability to run multiple tasks simultaneously, achieving parallelism.
Go uses goroutines to achieve concurrency
Goroutines are lightweight threads managed by the Go runtime
Concurrency in Go is achieved using channels for communication between goroutines
Q4. program on interface,methods,write an implemention interface
Implementing an interface with methods in Go
Define an interface with method signatures
Create a struct that implements the interface methods
Use the 'implements' keyword to associate the struct with the interface
Call the interface methods on the struct instance
Q5. difference between golang and other language
Go is a statically typed, compiled language with a focus on concurrency and simplicity.
Go has a simpler syntax compared to other languages like Java or C++
Go has built-in concurrency support with goroutines and channels
Go has a garbage collector that automatically manages memory
Go compiles to machine code, making it faster than interpreted languages like Python
Go has a standard library that includes many useful packages for networking, cryptography, and more
Q6. definition on struct,interface,method,functon
Definition of struct, interface, method, and function.
Struct is a composite data type that groups together zero or more values with different types.
Interface is a collection of method signatures that a type can implement.
Method is a function that has a receiver argument.
Function is a block of code that performs a specific task and can be called from other parts of the program.
Q7. implement stack if a structure is given
Implement a stack using the given structure.
Create a struct with an array to store the stack elements and an index to keep track of the top element
Implement functions like push, pop, and peek to manipulate the stack
Ensure to handle stack overflow and underflow cases
Q8. difference between slice and array
Arrays have fixed size while slices are dynamic. Slices are references to arrays.
Arrays are declared with a fixed size while slices are declared without a size.
Slices are references to arrays and can be resized dynamically.
Arrays are passed by value while slices are passed by reference.
Slices have built-in functions like append() and copy() for manipulation.
Example: var arr [3]int = [3]int{1, 2, 3} and var sli []int = []int{1, 2, 3}
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