1. Which data type is used for true/false values in JavaScript?

• String
• Number
• Boolean
• Undefined

2. What does the term 'concatenation' mean in JavaScript?

• Joining two or more strings together
• Performing arithmetic addition
• Creating an array
• Defining a function

3. How do you display output in the browser console in JavaScript?

• console.display()
• log.console()
• print()
• console.log()

4. What is the purpose of the 'alert()' function in JavaScript?

• Displaying a message in the console
• Showing a popup alert to the user
• Executing a loop
• Handling errors

5. What is the purpose of variables in JavaScript?

• To store and manage data
• To perform mathematical calculations
• To control the flow of the program
• To define HTML elements

6. Which keyword is used to declare a variable in JavaScript?

• var
• let
• const
• variable

7. Which symbol is used for comments that span multiple lines in JavaScript?

• /* */
• //
• #
• <!-- -->

8. What is the result of the expression: 10 + '5' in JavaScript?

• 15
• 105
• TypeError
• 50

9. How can you prompt the user for input in JavaScript?

• prompt()
• input()
• userPrompt()
• getInput()

10. What is the correct way to comment a single-line in JavaScript?

• // This is a comment
• # This is a comment
• <!-- This is a comment -->
• /** This is a comment */