Are you preparing for an interview in JavaScript? If yes, attempt this JavaScript MCQ quiz questions with answers created for freshers and experienced. JavaScript, abbreviated as JS, is one of the world's most popular programming languages that is used both on the client-side and server-side to make web pages interactive and dynamic. If you think you know this language very See morewell, why don't you give this quiz a try? Play the quiz below and evaluate your knowledge. Good luck!
The variable is only accessible inside the block(if-else/for block) inside which it is declared
The variables can be used globally.
The variables can be used globally.
None of the above
Both and c
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Var
Let
Const
Both b and c
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Functions are basically a statement which returns a constant value.
Functions are basically a set of statements that perform some task
Functions are one of the data types in JavaScript.
All of these
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Map
Filter
Reduce
All of these
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Functions
Class
Array
Object
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Through destructuring, we can unpack values from arrays or object properties into separate variables.
Destructuring allows us to restructure object properties
Destructuring allows us to restructure array elements.
All of these.
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Abc 1
Throws error
Null null
Undefined undefined
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It is the process of combining two or more functions to create a new function.
The function declaration is termed as function composition in JavaScript
Both a and b
None of these
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#This is a comment.
##This is a comment .
/This is a comment.
//This is a comment
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Func = func.bind(this)
Let func = () => {}
Both a and b
None of these
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Function abc() {}
Var abc = () => {}
Both a and b
None of these
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Null
Undefined
Throws error
True
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Map
Filter
Reduce
ForEach
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True
False
1,3,5,7
2,4,6,8
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Function sum(...theArgs) {}
Function sum(theArgs...) {}
Function sum(theArgs) {}
Function sum([theArgs]) {}
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Element.addListener(event => {})
AddListener(element, event => {})
AddEventListener(element, event => {})
Element.addEventListener(event => {})
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Data Object Model
Document or Model
Document Object Model
Document Object Meduim
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JSON.parse(string)
JSON.convertToObject(string)
JSON.object(string)
None of these
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Object.keys(obj)
Object.values(obj)
Object.entries(obj)
All of these
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