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

What does validateForm() function return on invalid input?

• A) undefined
• B) null
• C) false
• D) true

What does the i modifier (flag) do in a regular expression?

• A) Matches exact text only
• B) Searches multiple lines
• C) Ignores case (case-insensitive search)
• D) Searches the whole text globally

What is the purpose of compare function in sort()?

• A) To define custom sorting order
• B) To reverse array
• C) To delete elements
• D) To join arrays

What is the role of the default case in a switch statement?

• A) It executes when no matching case is found
• B) It executes first in all cases
• C) It is a mandatory case
• D) It must always be written at the end

How can we access a form using JavaScript?

• A) document.forms["formName"]
• B) window.form()
• C) document.getElementByClass()
• D) getForm()

What is the result of typeof null?

• A) object
• B) undefined
• C) string
• D) null

What is a breakpoint in debugging?

• A) A loop inside a program
• B) A variable used in JavaScript
• C) A point where code execution temporarily stops for checking values
• D) A type of error in code