BlockScoped

Explain what a closure is in Javascript and provide an example.

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List examples of falsy javascript values.

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Name two programming paradigms important for JavaScript developers.

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What is the difference between == and === ?

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Name 5 different type of for loops in Javascript, how they are different, and which one(s) may have the worst performance when iterating over an array?

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Explain the differences between var, let, and const

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Given an array of integers, how do you add a value to the beginning of the array?

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What is the output of the following?

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How do you break from an Array.prototype.forEach()?

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What is the difference between x++ and ++x?

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What are some differences between null and undefined?

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What are some ways to empty an array that will also update any variables that reference it?

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What is the output of the following lines?

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What is a pitfall of the following:

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What is the output of the following?

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What is the output of the following?

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What does DOM stand for?

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What will load faster on a web page: 1 external 100 kilobyte file or 4 external 25 kilobyte files?

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What does the defer attribute on a script tag do?

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What does the async attribute on a script tag do?

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What are two ways to load an external script asynchronously on a web page?

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Why might you want to load .js scripts at the bottom of the ?

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What is a literal value?

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What is a scope chain in Javascript?

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What is the output of the following line?

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What is the output of the following?

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Define Lexical Scoping

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Describe the use case for Promise.all?

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What is a Promise?

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What are the properties of a pure function?

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What is the difference between a function declaration and a function expression?

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What is a Javascript primitive?

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What is the difference between Object.create and Object.assign?

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Name the six Javascript primitive types

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What is the difference between a function and a method

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What is a setter? Provide an example.

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What is a getter? Provide an example.

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