Client-side validation is performed by:

• A) Browser
• B) Firewall
• C) Database
• D) Server

To traverse sideways in the DOM Tree, ___________ is not a function.

• A) siblings()
• B) nextUntil()
• C) next()
• D) nexts()

What is the purpose of the debugger keyword in JavaScript?

• A) It makes the code run faster
• B) It compiles the code into HTML
• C) It removes all errors automatically
• D) It pauses code execution for debugging purposes

What is the primary use of the splice() method?

• A) Adds and/or removes elements from the array
• B) Only deletes elements from the array
• C) Sorts the elements of the array
• D) Only adds elements to the array

Which condition confirms that an AJAX request was successfully completed?

• A) readyState == 0 and status == 200
• B) readyState == 4 and status == 200
• C) readyState == 1 and status == 500
• D) readyState == 2 and status == 404

What happens if you use a variable before declaring it (with var)?

• A) The program stops immediately
• B) It may return undefined
• C) It gives a syntax error
• D) It always gives a runtime error

In AJAX, which event is used to check the status of a server response?

• A) onreadystatechange
• B) onsubmit
• C) onclick
• D) onload

Why should we avoid global variables?

• A) They run faster
• B) They can be changed from anywhere in the program
• C) They are always required
• D) They increase security

The JQuery code: $("p").hide() will hide _________.

• A) all <p> elements
• B) None of the given options
• C) only last <p> element
• D) only first <p> element

What does the typeof operator return for arrays in JavaScript?

• A) string
• B) array
• C) index
• D) object

The statement window.alert() is equivalent to:

• A) print()
• B) console.log()
• C) document.write()
• D) alert()

Which is a floating point issue?

• A) 2 * 2 = 4
• B) 1 + 1 = 2
• C) 5 + 5 = 10
• D) 0.1 + 0.2 is not exactly 0.3

The third statement in a for loop is responsible for:

• A) Initialization
• B) Displaying output
• C) Condition checking
• D) Incrementing or decrementing the loop variable

A while loop executes:

• A) A fixed number of times
• B) Infinite number of times
• C) As long as the condition remains true
• D) Only once

Which of the following property(ies) of XMLHttpRequest object is/are used to get a response from the server?

• A) None of the given options
• B) Both responseText & responseXML
• C) responseXML
• D) responseText

What is the syntax for selecting HTML elements and performing some action on them in jQuery?

• A) $(selector)
• B) (selector).action()
• C) None of the given options
• D) $(selector).action()

The siblings() method selects:

• A) Elements at the same level
• B) Root element
• C) Parent element
• D) Child elements

Which JavaScript method is used to find the position (index) of a match in a string?

• A) replace()
• B) test()
• C) search()
• D) matchAll()

AJAX is based on internet standards, and uses

• A) Combination of both (A) & (B)
• B) (A). XMLHttpRequest object (to retrieve data from a web server)
• C) None of the above
• D) (B). JavaScript/DOM (to display/use the data)

Best practice for DOM access is:

• A) Access repeatedly
• B) Store it in a variable
• C) Avoid DOM
• D) Delete DOM