Standard Library & Idioms interview questions

1. A.an optional annotation declaring the expected type of a variable, parameter, or return value, unenforced at runtime
2. B.an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__
3. C.a string literal prefixed with f that interpolates embedded expressions inside braces at runtime
4. D.the match statement, added in 3.10, that branches by destructuring a value against case patterns

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1. A.type hint
2. B.f-string
3. C.context manager
4. D.structural pattern matching

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1. A.context manager — the match statement, added in 3.10, that branches by destructuring a value against case patterns
2. B.context manager — an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__
3. C.context manager — an optional annotation declaring the expected type of a variable, parameter, or return value, unenforced at runtime
4. D.context manager — a decorator that auto-generates init, repr, and equality methods from annotated class attributes

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1. A.a decorator that auto-generates init, repr, and equality methods from annotated class attributes
2. B.an optional annotation declaring the expected type of a variable, parameter, or return value, unenforced at runtime
3. C.an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__
4. D.a string literal prefixed with f that interpolates embedded expressions inside braces at runtime

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1. A.type hint
2. B.dataclass
3. C.structural pattern matching
4. D.context manager

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1. A.dataclass — a decorator that auto-generates init, repr, and equality methods from annotated class attributes
2. B.dataclass — an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__
3. C.dataclass — a string literal prefixed with f that interpolates embedded expressions inside braces at runtime
4. D.dataclass — the match statement, added in 3.10, that branches by destructuring a value against case patterns

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1. A.the match statement, added in 3.10, that branches by destructuring a value against case patterns
2. B.an optional annotation declaring the expected type of a variable, parameter, or return value, unenforced at runtime
3. C.a string literal prefixed with f that interpolates embedded expressions inside braces at runtime
4. D.an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__

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1. A.context manager
2. B.dataclass
3. C.type hint
4. D.f-string

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1. A.type hint — an optional annotation declaring the expected type of a variable, parameter, or return value, unenforced at runtime
2. B.type hint — a decorator that auto-generates init, repr, and equality methods from annotated class attributes
3. C.type hint — an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__
4. D.type hint — the match statement, added in 3.10, that branches by destructuring a value against case patterns

Answer + AI explanation with Pro

1. A.the match statement, added in 3.10, that branches by destructuring a value against case patterns
2. B.a decorator that auto-generates init, repr, and equality methods from annotated class attributes
3. C.an optional annotation declaring the expected type of a variable, parameter, or return value, unenforced at runtime
4. D.a string literal prefixed with f that interpolates embedded expressions inside braces at runtime

Answer + AI explanation with Pro

1. A.f-string
2. B.context manager
3. C.structural pattern matching
4. D.dataclass

Answer + AI explanation with Pro

1. A.f-string — a string literal prefixed with f that interpolates embedded expressions inside braces at runtime
2. B.f-string — a decorator that auto-generates init, repr, and equality methods from annotated class attributes
3. C.f-string — an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__
4. D.f-string — the match statement, added in 3.10, that branches by destructuring a value against case patterns

Answer + AI explanation with Pro

1. A.the match statement, added in 3.10, that branches by destructuring a value against case patterns
2. B.an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__
3. C.a decorator that auto-generates init, repr, and equality methods from annotated class attributes
4. D.a string literal prefixed with f that interpolates embedded expressions inside braces at runtime

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1. A.f-string
2. B.structural pattern matching
3. C.context manager
4. D.type hint

Answer + AI explanation with Pro

1. A.structural pattern matching — an optional annotation declaring the expected type of a variable, parameter, or return value, unenforced at runtime
2. B.structural pattern matching — a decorator that auto-generates init, repr, and equality methods from annotated class attributes
3. C.structural pattern matching — the match statement, added in 3.10, that branches by destructuring a value against case patterns
4. D.structural pattern matching — an object used with a with statement that guarantees setup and cleanup around a block via __enter__ and __exit__

Answer + AI explanation with Pro