Standard Library & Idioms interview questions

1. A.the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index
2. B.the statement that schedules a function call to run when the surrounding function returns, in last-in-first-out order
3. C.the standard carrier of deadlines, cancellation signals and request-scoped values across API boundaries
4. D.the synchronization helper guaranteeing a given function runs exactly one time across all goroutines

Answer + AI explanation with Pro

1. A.defer
2. B.sync.Mutex
3. C.slices package
4. D.context.Context

Answer + AI explanation with Pro

1. A.defer — the statement that schedules a function call to run when the surrounding function returns, in last-in-first-out order
2. B.defer — the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index
3. C.defer — the synchronization helper guaranteeing a given function runs exactly one time across all goroutines
4. D.defer — the standard carrier of deadlines, cancellation signals and request-scoped values across API boundaries

Answer + AI explanation with Pro

1. A.the statement that schedules a function call to run when the surrounding function returns, in last-in-first-out order
2. B.the mutual-exclusion lock whose Lock and Unlock methods guard a critical section against concurrent access
3. C.the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index
4. D.the standard carrier of deadlines, cancellation signals and request-scoped values across API boundaries

Answer + AI explanation with Pro

1. A.defer
2. B.context.Context
3. C.sync.Mutex
4. D.sync.Once

Answer + AI explanation with Pro

1. A.context.Context — the statement that schedules a function call to run when the surrounding function returns, in last-in-first-out order
2. B.context.Context — the standard carrier of deadlines, cancellation signals and request-scoped values across API boundaries
3. C.context.Context — the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index
4. D.context.Context — the synchronization helper guaranteeing a given function runs exactly one time across all goroutines

Answer + AI explanation with Pro

1. A.the mutual-exclusion lock whose Lock and Unlock methods guard a critical section against concurrent access
2. B.the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index
3. C.the statement that schedules a function call to run when the surrounding function returns, in last-in-first-out order
4. D.the synchronization helper guaranteeing a given function runs exactly one time across all goroutines

Answer + AI explanation with Pro

1. A.context.Context
2. B.sync.Mutex
3. C.slices package
4. D.defer

Answer + AI explanation with Pro

1. A.sync.Mutex — the statement that schedules a function call to run when the surrounding function returns, in last-in-first-out order
2. B.sync.Mutex — the synchronization helper guaranteeing a given function runs exactly one time across all goroutines
3. C.sync.Mutex — the mutual-exclusion lock whose Lock and Unlock methods guard a critical section against concurrent access
4. D.sync.Mutex — the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index

Answer + AI explanation with Pro

1. A.the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index
2. B.the mutual-exclusion lock whose Lock and Unlock methods guard a critical section against concurrent access
3. C.the standard carrier of deadlines, cancellation signals and request-scoped values across API boundaries
4. D.the synchronization helper guaranteeing a given function runs exactly one time across all goroutines

Answer + AI explanation with Pro

1. A.context.Context
2. B.sync.Once
3. C.sync.Mutex
4. D.slices package

Answer + AI explanation with Pro

1. A.sync.Once — the standard carrier of deadlines, cancellation signals and request-scoped values across API boundaries
2. B.sync.Once — the mutual-exclusion lock whose Lock and Unlock methods guard a critical section against concurrent access
3. C.sync.Once — the synchronization helper guaranteeing a given function runs exactly one time across all goroutines
4. D.sync.Once — the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index

Answer + AI explanation with Pro

1. A.the synchronization helper guaranteeing a given function runs exactly one time across all goroutines
2. B.the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index
3. C.the standard carrier of deadlines, cancellation signals and request-scoped values across API boundaries
4. D.the statement that schedules a function call to run when the surrounding function returns, in last-in-first-out order

Answer + AI explanation with Pro

1. A.slices package
2. B.context.Context
3. C.defer
4. D.sync.Mutex

Answer + AI explanation with Pro

1. A.slices package — the standard carrier of deadlines, cancellation signals and request-scoped values across API boundaries
2. B.slices package — the generic standard library collection added in 1.21 providing helpers like Sort, Contains and Index
3. C.slices package — the synchronization helper guaranteeing a given function runs exactly one time across all goroutines
4. D.slices package — the statement that schedules a function call to run when the surrounding function returns, in last-in-first-out order

Answer + AI explanation with Pro