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Question-1. What is Go (Golang)?
Answer-1: Go is an open-source programming language developed by Google, designed for simplicity, concurrency, and efficiency.
Question-2. Who created Go and when?
Answer-2: Go was created by Robert Griesemer, Rob Pike, and Ken Thompson at Google in 2009.
Question-3. What are the key features of Go?
Answer-3: Key features include simplicity, concurrency support, garbage collection, and fast compilation.
Question-4. What is the file extension for Go programs?
Answer-4: The file extension for Go programs is .go.
Question-5. How do you compile and run a Go program?
Answer-5: Use go run file.go to run and go build file.go to compile the program.
Question-6. What is the Go workspace?
Answer-6: A Go workspace includes directories like src, pkg, and bin for organizing projects.
Question-7. What are Go packages?
Answer-7: Go packages are collections of related code, imported using the import keyword.
Question-8. What is the main package in Go?
Answer-8: The main package is the entry point of a Go application, containing the main function.
Question-9. How do you declare variables in Go?
Answer-9: Use the var keyword or shorthand syntax. Example: var x int or x := 10.
Question-10. What is a slice in Go?
Answer-10: A slice is a dynamically-sized, flexible view into an array.
Question-11. What is the difference between an array and a slice in Go?
Answer-11: Arrays have fixed size; slices are dynamically resizable views over arrays.
Question-12. How does Go handle concurrency?
Answer-12: Go handles concurrency using goroutines and channels.
Question-13. What is a goroutine?
Answer-13: A goroutine is a lightweight thread managed by the Go runtime.
Question-14. What is a channel in Go?
Answer-14: Channels are used for communication between goroutines, ensuring safe data sharing.
Question-15. What is the difference between make and new in Go?
Answer-15: make initializes slices, maps, and channels; new allocates memory for other types.
Question-16. What are Go interfaces?
Answer-16: Interfaces define method signatures that types must implement.
Question-17. How do you handle errors in Go?
Answer-17: Go handles errors using explicit error values, often returned as the second return value.
Question-18. What is the defer statement in Go?
Answer-18: defer delays execution of a function until the surrounding function returns.
Question-19. What is a struct in Go?
Answer-19: A struct is a user-defined type that groups fields together.
Question-20. What is embedding in Go?
Answer-20: Embedding allows one struct to include another struct, achieving composition.
Question-21. What is the purpose of the init function in Go?
Answer-21: The init function initializes packages and runs before the main function.
Question-22. What is Go's garbage collection?
Answer-22: Garbage collection automatically manages memory allocation and deallocation.
Question-23. How does Go support immutability?
Answer-23: Go supports immutability via constants and unexported fields.
Question-24. What is the purpose of the blank identifier _ in Go?
Answer-24: _ is used to ignore values or avoid unused variable errors.
Question-25. What is Go's select statement?
Answer-25: select is used to wait on multiple channel operations.
Question-26. How do you create a map in Go?
Answer-26: Use the make function or a map literal. Example: make(map[string]int) or map[string]int{}.
Question-27. What are Go's basic types?
Answer-27: Basic types include int, float64, string, bool, and more.
Question-28. What is the difference between pointers and values in Go?
Answer-28: Pointers store memory addresses; values store actual data.
Question-29. What is shadowing in Go?
Answer-29: Shadowing occurs when a variable in a nested scope has the same name as a variable in an outer scope.
Question-30. What is Go's recover function?
Answer-30: recover regains control of a panicking goroutine, preventing the program from crashing.
Question-31. What is the difference between append and copy in Go?
Answer-31: append adds elements to slices; copy copies data between slices.
Question-32. What is the zero value in Go?
Answer-32: Zero values are the default values for uninitialized variables. Example: 0 for integers, "" for strings.
Question-33. How does Go handle string immutability?
Answer-33: Strings in Go are immutable, meaning their content cannot be changed after creation.
Question-34. How do you create a custom error in Go?
Answer-34: Implement the error interface by defining an Error() method. Example: type MyError struct.
Question-35. What is Go's context package?
Answer-35: The context package manages deadlines, cancellations, and request-scoped values across goroutines.
Question-36. What is Go's type assertion?
Answer-36: Type assertion extracts the underlying value of an interface. Syntax: x.(T).
Question-37. What is the iota keyword in Go?
Answer-37: iota is used for creating enumerated constants.
Question-38. What is Go's sync package?
Answer-38: The sync package provides primitives for synchronizing goroutines, like Mutex and WaitGroup.
Question-39. What is the difference between == and = in Go?
Answer-39: == checks equality; = is the assignment operator.
Question-40. What are exported identifiers in Go?
Answer-40: Identifiers starting with an uppercase letter are exported and accessible outside their package.
Question-41. What is the unsafe package in Go?
Answer-41: The unsafe package allows low-level memory manipulation, bypassing Go's type safety.
Question-42. How do you test code in Go?
Answer-42: Use the testing package and write test files ending with _test.go.
Question-43. What is the purpose of Go's go fmt tool?
Answer-43: go fmt formats Go code according to standard style guidelines.
Question-44. How do you handle panics in Go?
Answer-44: Use defer, recover, or avoid panics by properly handling errors.
Question-45. What are Go's build tags?
Answer-45: Build tags control file inclusion during compilation, specified with // +build.
Question-46. What is Go's interface{} type?
Answer-46: interface{} is the empty interface that can represent any value.
Question-47. How does Go achieve simplicity in dependency management?
Answer-47: Go uses modules and go.mod files for lightweight dependency management.
Question-48. What are variadic functions in Go?
Answer-48: Variadic functions accept a variable number of arguments. Syntax: func example(args ...int).
Question-49. What is the purpose of Go's go vet tool?
Answer-49: go vet analyzes code for suspicious constructs and potential issues.
Question-50. How do you ensure thread safety in Go?
Answer-50: Use synchronization primitives like sync.Mutex or channels to ensure thread safety.
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