Test your Javascript

A vibrant illustration depicting JavaScript concepts such as fun<wbr>ctions, objects, and coding elements, with a quiz theme

Test Your JavaScript Knowledge

Welcome to the interactive JavaScript quiz designed to challenge your understanding of this essential programming language. Test your skills with 10 carefully curated questions covering various aspects of JavaScript, including functions, objects, and variable naming conventions.

Whether you're a beginner or an experienced developer, this quiz is a great way to solidify your knowledge and discover areas for improvement:

Challenge yourself with multiple-choice questions
Receive immediate feedback on your answers
Sharpen your JavaScript skills

10 Questions2 MinutesCreated by CodingNinja557

Which of the following is true about variable naming conventions in JavaScript?

JavaScript variable names must begin with a letter or the underscore character.

JavaScript variable names are case sensitive.

Both of the above.

None of the above.

Which of the following is correct about callbacks?

A callback is a plain JavaScript function passed to some method as an argument or option.

Some callbacks are just events, called to give the user a chance to react when a certain state is triggered.

Both of the above.

None of the above.

Which of the following function of Number object formats a number with a specific number of digits to the right of the decimal?

ToExponential()

ToFixed()

ToPrecision()

ToLocaleString()

Which of the following function of Boolean object returns the primitive value of the Boolean object?

ToSource()

ValueOf()

ToString()

None of the above.

Which of the following function of String object returns the index within the calling String object of the last occurrence of the specified value?

Search()

Substr()

LastIndexOf()

IndexOf()

Which of the following function of String object returns the primitive value of the specified object.

ToLocaleUpperCase()

ToUpperCase()

ToString()

ValueOf()

Which of the following function of String object causes a string to be displayed as struck-out text, as if it were in a ~~tag?~~

~~Sup()~~

~~Small()~~

~~Strike()~~

~~Sub()~~

~~Which of the following function of Array object returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found?~~

~~IndexOf()~~

~~LastIndexOf()~~

~~Join()~~

~~Map()~~

~~Which of the following function of Array object removes the first element from an array and returns that element?~~

~~Reverse()~~

~~Shift()~~

~~Slice()~~

~~Some()~~

Test your Javascript

Test Your JavaScript Knowledge

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