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

What does the == operator check in JavaScript?

• A) Both value and data type
• B) Reference equality
• C) Only the data type
• D) Only the value

What is meant by DOM traversing in jQuery?

• A) Select on element and move upwards or downwards to reach the required elements
• B) Select child, parent, ancestor, current, descendant and sibling
• C) Find the desired elements on the basis of their relationship with other elements
• D) All of the given options

What does the === operator check in JavaScript?

• A) Both value and data type
• B) Reference equality
• C) Only the data type
• D) Only the value

In JavaScript, the Window object represents:

• A) The browser’s main window or tab environment
• B) The file system
• C) A database connection
• D) The server environment

AJAX allows:

• A) Page reload always
• B) No server communication
• C) Only HTML rendering
• D) Partial page updates

When should you use objects instead of arrays in JavaScript?

• A) When you want to avoid using new Array()
• B) When you want the element names to be numbers
• C) When you want the element names to be strings (text)
• D) When you want to create a hash array

The setInterval() function is used to:

• A) Execute code repeatedly at fixed time intervals
• B) Stop all timers
• C) Execute code once after delay
• D) Execute code only on errors

Which object is the keystone of AJAX?

• A) DOM
• B) JSON
• C) XMLHttpRequest
• D) Fetch API only

What is the purpose of the throw statement in JavaScript?

• A) It creates a custom error message
• B) It ignores the error
• C) It stops a loop
• D) It declares a variable

Why should we avoid reserved words for variables?

• A) Reduce memory
• B) Improve speed
• C) Avoid syntax errors
• D) Increase loops

What is the result of Number(true)?

• A) true
• B) 1
• C) false
• D) 0

What is the result of typeof "Hello"?

• A) string
• B) number
• C) boolean
• D) object

What does else do?

• A) Executes when condition is true
• B) Loops code
• C) Executes when condition is false
• D) Ends program