LEARN JAVASCRIPT
QUIZ Questions
🎓🚀 Challenge Time: Test Your JavaScript Knowledge! 💡🖥️
Calling all coding enthusiasts and JavaScript gurus! It’s time to put your skills to the test with our latest JavaScript quiz. From basic syntax to complex functions, this quiz covers it all. Are you ready to flex your coding muscles? 💪
🔍 What’s Your JavaScript IQ?
- Do you know the right way to link an external script in your HTML?
- Can you determine the result of a boolean expression like
Boolean(10 > 9)? - Ever wondered how to dynamically change content in an HTML element using JavaScript?
- Where should you ideally insert your JavaScript code in an HTML file?
- Alert boxes are common, but can you script a simple “Hello World” popup?
And that’s just the beginning! Dive deeper into creating objects, comparing values, working with arrays, and much more. This quiz is not just a test; it’s a journey through the fascinating world of JavaScript.
👨💻 Why Take the Quiz?
- Sharpen your JavaScript skills.
- Discover areas you excel in and ones you might need to brush up on.
- Stay sharp and relevant in the ever-evolving world of web development.
- Plus, it’s fun!
🌟 Join Us on This Coding Adventure! Whether you’re a seasoned developer or just starting out, there’s something for everyone. Share your scores, challenge your friends, and let’s ignite some friendly competition in the tech community!
Don’t forget to share your thoughts and experiences in the comments. Let’s get quizzical with JavaScript!
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1. What is the correct syntax for referring to an external script called script.js?
A. <script name=”script.js”>
B. <script href=”script.js”>
C. <script src=”script.js”>
D. <script link=”script.js”>
Answer: C
2. How do you create a function in JavaScript?
A. function:myFunction()
B. function = myFunction()
C. function myFunction()
D. function => myFunction()
Answer: C
3. How to write an if statement in JavaScript?
A. if (i == 5)
B. if i = 5
C. if i == 5 then
D. if i = 5 then
Answer: A
4. How does a while loop start?
A. while (i <= 10; i++)
B. while i = 1 to 10
C. while (i <= 10)
D. while (i++)
Answer: C
5. How can you add a comment in JavaScript?
A. <!–This is a comment–>
B. //This is a comment
C. /* This is a comment */
D. Both B and C
Answer: D
6. What is the correct way to write a JavaScript array?
A. var colors = (1:”red”, 2:”green”, 3:”blue”)
B. var colors = “red”, “green”, “blue”
C. var colors = [“red”, “green”, “blue”]
D. var colors = 1 = (“red”), 2 = (“green”), 3 = (“blue”)
Answer: C
7. Which event occurs when the user clicks on an HTML element?
A. onmouseclick
B. onchange
C. onclick
D. onmouseover
Answer: C
8. How do you declare a JavaScript variable?
A. v variableName;
B. variable variableName;
C. var variableName;
D. let variableName;
Answer: C
9. Which operator is used to assign a value to a variable?
A. *
B. –
C. =
D. x
Answer: C
10. What will the following code return: Boolean(10 > 9)
A. NaN
B. false
C. true
D. undefined
Answer: C
11. What is the correct JavaScript syntax to change the content of the HTML element below?
html
Copy code
<p id=”demo”>This is a demonstration.</p>
A. document.getElement(“p”).innerHTML = “Hello World!”;
B. document.getElementById(“demo”).innerHTML = “Hello World!”;
C. #demo.innerHTML = “Hello World!”;
D. document.getElementByName(“p”).innerHTML = “Hello World!”;
Answer: B
12. Where is the correct place to insert a JavaScript?
A. Both the <head> section and the <body> section are correct
B. The <body> section
C. The <head> section
D. The <footer> section
Answer: A
13. How do you write “Hello World” in an alert box?
A. msgBox(“Hello World”);
B. alert(“Hello World”);
C. msg(“Hello World”);
D. alertBox(“Hello World”);
Answer: B
14. How do you create an object in JavaScript?
A. var person = {firstName:”John”, lastName:”Doe”};
B. var person = Object(“John”, “Doe”);
C. var person = new Object(“John”, “Doe”);
D. var person = (firstName:”John”, lastName:”Doe”);
Answer: A
15. Which operator is used to check if two values are equal and of the same type?
A. =
B. ==
C. ===
D. !=
Answer: C
16. How do you find the number with the highest value of x and y?
A. top(x, y)
B. Math.max(x, y)
C. Math.ceil(x, y)
D. ceil(x, y)
Answer: B