Golang 面试题与答案
相关差异对比
问题 16. Explain the purpose of the 'context' package in Go.
The 'context' package in Go is used for carrying deadlines, cancellations, and other request-scoped values across API boundaries and between processes.
问题 17. What is the purpose of the 'defer' statement in Go?
The 'defer' statement is used to ensure that a function call is performed later in a program's execution, usually for purposes such as cleanup or releasing resources.
问题 18. How does Go support testing?
Go has a built-in testing package ('testing') that provides a testing framework. Tests are written in separate files with the '_test.go' suffix, and the 'go test' command is used to run tests.
问题 19. Explain the difference between 'map' and 'slice' in Go.
A 'map' in Go is an unordered collection of key-value pairs, while a 'slice' is an ordered sequence of elements. Maps are used for lookups based on keys, while slices are used for ordered data.
问题 20. What is the purpose of the 'sync' package in Go?
The 'sync' package in Go provides a set of primitives for managing synchronization between goroutines. It includes Mutexes, WaitGroups, and other constructs for safe concurrent programming.
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