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Modern ES6+ Features Mastery Hub: The Industry Foundation Pr

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Q1Domain Verified
In ES6+, what is the primary advantage of using `let` and `const` over `var` in terms of variable scope and hoisting?
`let` and `const` variables are hoisted to the top of their block scope, making them accessible within loops but not in conditional statements.
`let` and `const` variables are not hoisted and exist in a "temporal dead zone" until their declaration, preventing accidental use before initialization.
`var` provides block-level scope, while `let` and `const` are limited to function scope, offering more granular control.
`let` and `const` variables are hoisted to the top of their function scope and can be accessed before declaration, similar to `var`.
Q2Domain Verified
Consider the following arrow function: `const greet = (name) => `Hello, ${name}!`;`. What is the key difference in behavior between this arrow function and a traditional `function` declaration for `greet` when used as a method within an object?
The arrow function will inherit its `this` context from the surrounding scope in which it was defined, while a traditional function will have its `this` context dynamically bound to the object it's called on.
Both the arrow function and the traditional function will have their `this` context bound to the object they are called on, with no discernible difference in this scenario.
The arrow function will correctly bind its `this` context to the object it's called on, whereas a traditional function would inherit `this` from the surrounding scope.
The arrow function will throw a `TypeError` if `this` is accessed within it, while a traditional function will correctly resolve `this`.
Q3Domain Verified
Which of the following ES6+ features provides a concise syntax for creating arrays with elements from an iterable or for adding individual elements to an array, and can also be used with objects to create new objects with overridden or added properties?
Default Parameters
Destructuring Assignment
Template Literals
Spread Syntax (`...`)

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