Interfaces interview questions

1. A.the gotcha where an interface holding a nil pointer is itself non-nil because it still carries type information
2. B.a type defined purely by a set of method signatures that any value implementing them can satisfy
3. C.the x.(T) expression that extracts the underlying concrete value from an interface, optionally returning an ok boolean
4. D.the any alias that places no method requirements and can therefore hold a value of every type

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1. A.Empty interface
2. B.Interface
3. C.Type switch
4. D.Type assertion

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1. A.Interface — the gotcha where an interface holding a nil pointer is itself non-nil because it still carries type information
2. B.Interface — a type defined purely by a set of method signatures that any value implementing them can satisfy
3. C.Interface — the any alias that places no method requirements and can therefore hold a value of every type
4. D.Interface — a switch statement on x.(type) used to branch on the dynamic concrete type stored inside an interface value

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1. A.the x.(T) expression that extracts the underlying concrete value from an interface, optionally returning an ok boolean
2. B.the any alias that places no method requirements and can therefore hold a value of every type
3. C.a switch statement on x.(type) used to branch on the dynamic concrete type stored inside an interface value
4. D.the gotcha where an interface holding a nil pointer is itself non-nil because it still carries type information

Answer + AI explanation with Pro

1. A.Empty interface
2. B.Type switch
3. C.Nil interface trap
4. D.Interface

Answer + AI explanation with Pro

1. A.Empty interface — the any alias that places no method requirements and can therefore hold a value of every type
2. B.Empty interface — a switch statement on x.(type) used to branch on the dynamic concrete type stored inside an interface value
3. C.Empty interface — a type defined purely by a set of method signatures that any value implementing them can satisfy
4. D.Empty interface — the gotcha where an interface holding a nil pointer is itself non-nil because it still carries type information

Answer + AI explanation with Pro

1. A.a switch statement on x.(type) used to branch on the dynamic concrete type stored inside an interface value
2. B.the x.(T) expression that extracts the underlying concrete value from an interface, optionally returning an ok boolean
3. C.the any alias that places no method requirements and can therefore hold a value of every type
4. D.a type defined purely by a set of method signatures that any value implementing them can satisfy

Answer + AI explanation with Pro

1. A.Empty interface
2. B.Type switch
3. C.Interface
4. D.Type assertion

Answer + AI explanation with Pro

1. A.Type assertion — a type defined purely by a set of method signatures that any value implementing them can satisfy
2. B.Type assertion — a switch statement on x.(type) used to branch on the dynamic concrete type stored inside an interface value
3. C.Type assertion — the x.(T) expression that extracts the underlying concrete value from an interface, optionally returning an ok boolean
4. D.Type assertion — the any alias that places no method requirements and can therefore hold a value of every type

Answer + AI explanation with Pro

1. A.the gotcha where an interface holding a nil pointer is itself non-nil because it still carries type information
2. B.a type defined purely by a set of method signatures that any value implementing them can satisfy
3. C.a switch statement on x.(type) used to branch on the dynamic concrete type stored inside an interface value
4. D.the any alias that places no method requirements and can therefore hold a value of every type

Answer + AI explanation with Pro

1. A.Type switch
2. B.Empty interface
3. C.Interface
4. D.Type assertion

Answer + AI explanation with Pro

1. A.Type switch — the gotcha where an interface holding a nil pointer is itself non-nil because it still carries type information
2. B.Type switch — a switch statement on x.(type) used to branch on the dynamic concrete type stored inside an interface value
3. C.Type switch — the any alias that places no method requirements and can therefore hold a value of every type
4. D.Type switch — the x.(T) expression that extracts the underlying concrete value from an interface, optionally returning an ok boolean

Answer + AI explanation with Pro

1. A.a type defined purely by a set of method signatures that any value implementing them can satisfy
2. B.the any alias that places no method requirements and can therefore hold a value of every type
3. C.the gotcha where an interface holding a nil pointer is itself non-nil because it still carries type information
4. D.the x.(T) expression that extracts the underlying concrete value from an interface, optionally returning an ok boolean

Answer + AI explanation with Pro

1. A.Type switch
2. B.Nil interface trap
3. C.Empty interface
4. D.Type assertion

Answer + AI explanation with Pro

1. A.Nil interface trap — a type defined purely by a set of method signatures that any value implementing them can satisfy
2. B.Nil interface trap — a switch statement on x.(type) used to branch on the dynamic concrete type stored inside an interface value
3. C.Nil interface trap — the gotcha where an interface holding a nil pointer is itself non-nil because it still carries type information
4. D.Nil interface trap — the x.(T) expression that extracts the underlying concrete value from an interface, optionally returning an ok boolean

Answer + AI explanation with Pro