Q
What is the purpose of parameters in a JavaScript function?

Answer & Solution

Answer: Option D
Solution:
Parameters in a JavaScript function are used to accept inputs or values into the function. They act as placeholders that store the values passed to the function when it is called, allowing the function to work with dynamic data and perform operations based on the provided inputs.
Related Questions on Average

Which event is triggered when a web page finishes loading?

A). A. onload

B). B. onsubmit

C). C. onmouseover

D). D. onclick

Which of the following correctly defines a JavaScript function?

A). A. function addNumbers(num1, num2) { return num1 + num2; }

B). B. function = addNumbers(num1, num2) { return num1 + num2; }

C). C. function addNumbers(num1 + num2) { return num1 + num2; }

D). D. function addNumbers(num1, num2) => { return num1 + num2; }

What is the purpose of the onmouseover event in HTML?

A). A. To detect when an element is hovered over

B). B. To track changes in form inputs

C). C. To determine when an element is loaded

D). D. To handle form submissions

Which method is used to attach an event listener to an HTML element in JavaScript?

A). A. appendEvent()

B). B. addEventListener()

C). C. attachEvent()

D). D. bindEvent()

What does the preventDefault() method do in JavaScript event handling?

A). A. Stops event propagation to parent elements

B). B. Prevents the default behavior associated with an event

C). C. Detaches event listeners from elements

D). D. Clears the event queue

What is the purpose of the onclick attribute in HTML elements?

A). A. To define styles for HTML elements

B). B. To attach event listeners for mouse clicks

C). C. To insert JavaScript code directly into HTML

D). D. To create animations for HTML elements

What is the purpose of an event in JavaScript?

A). A. To add styles to HTML elements

B). B. To handle user interactions and browser actions

C). C. To define function names

D). D. To create animations on web pages

What is the purpose of the removeEventListener() method in JavaScript?

A). A. To add event listeners to HTML elements

B). B. To detach event listeners from HTML elements

C). C. To prevent event propagation in event handling

D). D. To modify HTML content dynamically

Which event occurs when a user submits an HTML form?

A). A. onsubmit

B). B. onmouseover

C). C. onkeydown

D). D. onclick

Consider the following HTML code: Which JavaScript code adds a click event listener to the button?

A). A. document.getElementById('myButton').onclick = function() { alert('Button clicked'); };

B). B. document.getElementById('myButton').addEventListener('click', function() { alert('Button clicked'); });

C). C. document.getElementById('myButton').click(function() { alert('Button clicked'); });

D). D. document.getElementById('myButton').on('click', function() { alert('Button clicked'); });