JS quiz

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JavaScript Mastery Quiz

Test your knowledge of JavaScript with our engaging quiz designed for developers of all skill levels! Whether you're a beginner or an expert, this quiz will challenge your understanding of important JavaScript concepts.

11 challenging questions
Multiple choice format
Instant results

11 Questions3 MinutesCreated by CodingWizard57

What will this code log to the console?

Null undefined undefined

Undefined undefined f b() {}

It will throw an exception

Undefined f b() {} undefined

What will this code log to the console?

Undefined

It will throw an exception

None of the other options

What will this code log to the console?

None of the other options

Local

Global

Undefined

What will this code log to the console?

Undefined

It will throw an exception

What will the following code log to the console?

'false true' on the first line and 'true false' on the first line

'false false' on the first line and 'true false' on the first line

Nothing, the processor will catch fire trying to figure it out.

Fill in the blanks in the following statement: The ______ in a function is determined by the way the function is invoked, while the ______ is determined by where the function was lexically declared.

1st blank - scope 2nd blank - value of 'this'

1st blank - value of 'this' 2nd blank - scope

Is the following statement true or false: "In JavaScript, the name of the function needs to start with an uppercase letter (eg. Foo) in order to be invoked as a constructor (eg. new Foo())" ?

True

False

Is the following statement true or false: "When invoked as a constructor, a function will return an object, even if the function has no return statement at all"?

True

False

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