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

How can you prevent the default behavior of an event in JavaScript?

A). A. By using the event.preventDefault() method inside the event handler function

B). B. By using the event.stopPropogation() method inside the event handler function

C). C. By using the event.stopPropagation() method inside the event handler function

D). D. By using the event.defaultPrevented property inside the event handler function

How can you attach multiple event listeners to the same HTML element in JavaScript without overwriting existing ones?

A). A. By using the attachEvent() method

B). B. By using the addEventListener() method with the replace parameter

C). C. By assigning multiple functions directly to the element's event attributes (e.g., onclick, onmouseover)

D). D. By using the addEventListener() method multiple times for the same event

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

Which event occurs when a user submits an HTML form?

A). A. onsubmit

B). B. onmouseover

C). C. onkeydown

D). D. onclick

Which event is triggered when a user clicks on an HTML element?

A). A. onhover

B). B. onsubmit

C). C. onload

D). D. onclick

Which type of JavaScript function is defined without a name?

A). A. Named function

B). B. Anonymous function

C). C. Arrow function

D). D. Generator function

What is the primary purpose of JavaScript functions?

A). A. To style web pages

B). B. To provide structure to HTML elements

C). C. To create reusable code blocks

D). D. To define CSS styles for HTML

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'); });

Consider the following JavaScript code: document.addEventListener('keypress', function(event) { console.log('Key pressed:', event.key); }); What does this code do?

A). A. Adds a click event listener to the document

B). B. Adds a keypress event listener to the document

C). C. Removes a keypress event listener from the document

D). D. Checks if a key is pressed while hovering over an element

Which event is triggered when a web page finishes loading?

A). A. onload

B). B. onsubmit

C). C. onmouseover

D). D. onclick