Complex Data Mockest | JavaScript

11.

How do you call a function in JavaScript?

A). Using the execute() method B). Using the call() method C). Using the run() method D). By using the function name followed by parentheses

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12.

What is the return statement used for in a function?

A). To stop the execution of the function B). To specify the function's name C). To return a value from the function D). To define object properties

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13.

What is the purpose of using functions as values in JavaScript?

A). To define object properties B). To store strings and numbers C). To perform a specific task or operation D). To represent complex data structures

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14.

How do you access an array element at a specific index in JavaScript?

A). Using square brackets notation (arrayName[index]) B). Using dot notation (arrayName.elementName) C). Using parentheses notation (arrayName(index)) D). Using curly braces notation (arrayName{index})

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15.

Which of the following statements accurately describes an object in JavaScript?

A). Objects are ordered collections of elements. B). Objects are collections of key-value pairs. C). Objects are sequences of characters. D). Objects are single values.

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16.

What is the result of typeof [] in JavaScript?

A). object B). array C). list D). string

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17.

What does the push() method do when used with an array in JavaScript?

A). Removes the last element from the array. B). Adds elements to the end of the array. C). Adds elements to the beginning of the array. D). Sorts the elements in the array.

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18.

How can you remove the last element from an array in JavaScript?

A). Using the pop() method. B). Using the shift() method. C). Using the unshift() method. D). Using the removeLast() method.

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19.

What is the purpose of using the length property with arrays in JavaScript?

A). To access the last element of the array. B). To add elements to the array. C). To determine the number of elements in the array. D). To access the first element of the array.

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20.

How do you define a method within an object in JavaScript?

A). By using the function keyword followed by the method name and code block. B). By using the method keyword followed by the method name and code block. C). By using the define keyword followed by the method name and code block. D). By using the process keyword followed by the method name and code block.

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