12 Questions
What is ES6?
The 6th version of ECMA Script programming language
When was ECMAScript 2015 published?
2015
What is a major enhancement brought by ES6 to JavaScript?
Easier large-scale software development
What does block scope refer to in JavaScript?
The concept of variable visibility within a block of code
Why might a developer from Java find JavaScript's scope behavior confusing?
JavaScript only has global and function scopes
How can ES6 code be made compatible with browsers that do not fully support it?
By converting ES6 code to ES5 using a transpiler
What is the behavior of variable scoping in ES5 JavaScript?
Global scope and function scope only
In ES6+, where are variables declared inside a block visible?
Inside the block and any nested blocks inside that block
What is a common workaround to address the lack of block-level scope in JavaScript?
Immediately Invoked Function Expression (IIFE)
Where does a variable declared using var exist in ES5 JavaScript?
Global scope
What would be the output of the following code snippet in ES5 JavaScript? console.log(a); var a = 'global';
ReferenceError: a is not defined
What is one misconception that developers from Java or C++ backgrounds might have when dealing with variable scoping in JavaScript?
Variables cannot be used outside of the block they are declared in
Test your knowledge about ECMAScript 6 (ES6), the significant upgrade to the JavaScript language released in 2015. Learn about the new features introduced to facilitate large-scale software development.
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