The Complete React Developer Course (with Hooks and Redux) - ES6 Aside: const and let

The Complete React Developer Course (with Hooks and Redux) - ES6 Aside: const and let

Assessment

Interactive Video

Information Technology (IT), Architecture, Health Sciences, Performing Arts, Other, Biology

University

Hard

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The video tutorial explores ES6 let and const variables as alternatives to var in JavaScript. It explains the quirks of var, such as reassigning and redefining variables, and introduces let and const for better scoping and immutability. The tutorial covers the creation, usage, and scoping differences of these variables, emphasizing best practices for using let and const in programming.

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10 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What are the main differences between VAR, LET, and CONST in JavaScript?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

Why is it recommended to avoid using VAR in modern JavaScript development?

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

Explain the concept of scoping in relation to VAR, LET, and CONST.

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4.

OPEN ENDED QUESTION

3 mins • 1 pt

What happens if you try to redefine a variable declared with LET or CONST?

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5.

OPEN ENDED QUESTION

3 mins • 1 pt

How can you create a variable that is block-scoped in JavaScript?

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6.

OPEN ENDED QUESTION

3 mins • 1 pt

Describe a situation where using CONST would be more appropriate than using LET.

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7.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the significance of using the playground folder mentioned in the text?

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