this & Functions interview questions

1. A.calling a function with new sets this to a newly created object that is returned by default
2. B.an arrow function has no own this; it captures this from the enclosing lexical scope
3. C.when called as obj.method(), this is the object to the left of the dot
4. D.returns a new function whose this is permanently bound to a given object

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1. A.call vs apply
2. B.Method invocation this
3. C.Arrow function this
4. D.new binding

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1. A.Arrow function this — returns a new function whose this is permanently bound to a given object
2. B.Arrow function this — an arrow function has no own this; it captures this from the enclosing lexical scope
3. C.Arrow function this — calling a function with new sets this to a newly created object that is returned by default
4. D.Arrow function this — a plain function call leaves this as undefined in strict mode (the global object otherwise)

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1. A.an arrow function has no own this; it captures this from the enclosing lexical scope
2. B.returns a new function whose this is permanently bound to a given object
3. C.both invoke a function with an explicit this; call passes arguments individually, apply passes them as an array
4. D.calling a function with new sets this to a newly created object that is returned by default

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1. A.Default this in strict mode
2. B.new binding
3. C.call vs apply
4. D.Function.prototype.bind

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1. A.Function.prototype.bind — both invoke a function with an explicit this; call passes arguments individually, apply passes them as an array
2. B.Function.prototype.bind — calling a function with new sets this to a newly created object that is returned by default
3. C.Function.prototype.bind — when called as obj.method(), this is the object to the left of the dot
4. D.Function.prototype.bind — returns a new function whose this is permanently bound to a given object

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1. A.a plain function call leaves this as undefined in strict mode (the global object otherwise)
2. B.both invoke a function with an explicit this; call passes arguments individually, apply passes them as an array
3. C.when called as obj.method(), this is the object to the left of the dot
4. D.an arrow function has no own this; it captures this from the enclosing lexical scope

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1. A.Method invocation this
2. B.new binding
3. C.call vs apply
4. D.Function.prototype.bind

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1. A.call vs apply — both invoke a function with an explicit this; call passes arguments individually, apply passes them as an array
2. B.call vs apply — when called as obj.method(), this is the object to the left of the dot
3. C.call vs apply — a plain function call leaves this as undefined in strict mode (the global object otherwise)
4. D.call vs apply — calling a function with new sets this to a newly created object that is returned by default

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1. A.both invoke a function with an explicit this; call passes arguments individually, apply passes them as an array
2. B.an arrow function has no own this; it captures this from the enclosing lexical scope
3. C.calling a function with new sets this to a newly created object that is returned by default
4. D.when called as obj.method(), this is the object to the left of the dot

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1. A.Default this in strict mode
2. B.Arrow function this
3. C.Method invocation this
4. D.new binding

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1. A.Method invocation this — both invoke a function with an explicit this; call passes arguments individually, apply passes them as an array
2. B.Method invocation this — calling a function with new sets this to a newly created object that is returned by default
3. C.Method invocation this — a plain function call leaves this as undefined in strict mode (the global object otherwise)
4. D.Method invocation this — when called as obj.method(), this is the object to the left of the dot

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1. A.both invoke a function with an explicit this; call passes arguments individually, apply passes them as an array
2. B.an arrow function has no own this; it captures this from the enclosing lexical scope
3. C.calling a function with new sets this to a newly created object that is returned by default
4. D.a plain function call leaves this as undefined in strict mode (the global object otherwise)

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1. A.Default this in strict mode
2. B.Method invocation this
3. C.Function.prototype.bind
4. D.new binding

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1. A.new binding — a plain function call leaves this as undefined in strict mode (the global object otherwise)
2. B.new binding — calling a function with new sets this to a newly created object that is returned by default
3. C.new binding — when called as obj.method(), this is the object to the left of the dot
4. D.new binding — an arrow function has no own this; it captures this from the enclosing lexical scope

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1. A.when called as obj.method(), this is the object to the left of the dot
2. B.calling a function with new sets this to a newly created object that is returned by default
3. C.an arrow function has no own this; it captures this from the enclosing lexical scope
4. D.a plain function call leaves this as undefined in strict mode (the global object otherwise)

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1. A.call vs apply
2. B.Arrow function this
3. C.Method invocation this
4. D.Default this in strict mode

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1. A.Default this in strict mode — calling a function with new sets this to a newly created object that is returned by default
2. B.Default this in strict mode — a plain function call leaves this as undefined in strict mode (the global object otherwise)
3. C.Default this in strict mode — an arrow function has no own this; it captures this from the enclosing lexical scope
4. D.Default this in strict mode — when called as obj.method(), this is the object to the left of the dot

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