Scope & Closures interview questions

1. A.var declarations are moved to the top of their function scope and initialized to undefined
2. B.a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned
3. C.the region a let or const binding is visible in — the nearest enclosing curly-brace block
4. D.the span in which a let/const binding exists but throws if accessed before its declaration runs

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1. A.Temporal dead zone
2. B.Closure
3. C.Lexical scoping
4. D.Block scope

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1. A.Closure — the region a let or const binding is visible in — the nearest enclosing curly-brace block
2. B.Closure — a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned
3. C.Closure — an immediately invoked function expression used to create a private scope without leaking globals
4. D.Closure — var declarations are moved to the top of their function scope and initialized to undefined

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1. A.an immediately invoked function expression used to create a private scope without leaking globals
2. B.a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned
3. C.the region a let or const binding is visible in — the nearest enclosing curly-brace block
4. D.scope determined by where code is written in the source, not by where a function is called from

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1. A.Lexical scoping
2. B.Block scope
3. C.var hoisting
4. D.Temporal dead zone

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1. A.Lexical scoping — the span in which a let/const binding exists but throws if accessed before its declaration runs
2. B.Lexical scoping — an immediately invoked function expression used to create a private scope without leaking globals
3. C.Lexical scoping — a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned
4. D.Lexical scoping — scope determined by where code is written in the source, not by where a function is called from

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1. A.scope determined by where code is written in the source, not by where a function is called from
2. B.a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned
3. C.an immediately invoked function expression used to create a private scope without leaking globals
4. D.var declarations are moved to the top of their function scope and initialized to undefined

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1. A.Temporal dead zone
2. B.IIFE
3. C.Block scope
4. D.var hoisting

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1. A.var hoisting — the span in which a let/const binding exists but throws if accessed before its declaration runs
2. B.var hoisting — a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned
3. C.var hoisting — var declarations are moved to the top of their function scope and initialized to undefined
4. D.var hoisting — the region a let or const binding is visible in — the nearest enclosing curly-brace block

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1. A.the region a let or const binding is visible in — the nearest enclosing curly-brace block
2. B.an immediately invoked function expression used to create a private scope without leaking globals
3. C.a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned
4. D.the span in which a let/const binding exists but throws if accessed before its declaration runs

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1. A.Temporal dead zone
2. B.var hoisting
3. C.Block scope
4. D.Closure

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1. A.Temporal dead zone — the span in which a let/const binding exists but throws if accessed before its declaration runs
2. B.Temporal dead zone — var declarations are moved to the top of their function scope and initialized to undefined
3. C.Temporal dead zone — the region a let or const binding is visible in — the nearest enclosing curly-brace block
4. D.Temporal dead zone — a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned

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1. A.the region a let or const binding is visible in — the nearest enclosing curly-brace block
2. B.a function together with references to its surrounding lexical scope, so it can use outer variables after the outer function has returned
3. C.var declarations are moved to the top of their function scope and initialized to undefined
4. D.the span in which a let/const binding exists but throws if accessed before its declaration runs

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1. A.Block scope
2. B.var hoisting
3. C.Closure
4. D.Temporal dead zone

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1. A.Block scope — var declarations are moved to the top of their function scope and initialized to undefined
2. B.Block scope — the region a let or const binding is visible in — the nearest enclosing curly-brace block
3. C.Block scope — an immediately invoked function expression used to create a private scope without leaking globals
4. D.Block scope — scope determined by where code is written in the source, not by where a function is called from

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1. A.an immediately invoked function expression used to create a private scope without leaking globals
2. B.scope determined by where code is written in the source, not by where a function is called from
3. C.var declarations are moved to the top of their function scope and initialized to undefined
4. D.the span in which a let/const binding exists but throws if accessed before its declaration runs

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1. A.Temporal dead zone
2. B.IIFE
3. C.var hoisting
4. D.Lexical scoping

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1. A.IIFE — the span in which a let/const binding exists but throws if accessed before its declaration runs
2. B.IIFE — an immediately invoked function expression used to create a private scope without leaking globals
3. C.IIFE — scope determined by where code is written in the source, not by where a function is called from
4. D.IIFE — var declarations are moved to the top of their function scope and initialized to undefined

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