Javascript,hoisting,closure,let,vat.const
Quiz by RAHUL KUMAR SINGH
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5 questions
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- Q1Which keyword in JavaScript allows variables to be block scoped?blockconstdynamicletvar30s
- Q2What does the term 'hoisting' refer to in JavaScript?Resizing images dynamicallyAnimating elements on a webpageVariable and function declarations are moved to the top of their containing scope during the compile phaseHandling user input in real-time30s
- Q3What is a closure in JavaScript?A type of loop structureA way to lock data in a JavaScript applicationAn error handling mechanismA closure is the combination of a function and the lexical environment within which that function was declared30s
- Q4Which keyword in JavaScript is used to declare constants?finalletvarconststatic30s
- Q5How does the 'let' keyword differ from the 'var' keyword in JavaScript?'let' is declared globally by default'var' allows block-scoping in ES6'let' is block-scoped while 'var' is function-scoped'let' allows variable re-declaration within the same block'var' can be used inside for loops only30s