### Q1: What are the three keywords used to declare variables in JavaScript, and which one is used for constants?  
### Q2: How does the use of functions improve code efficiency in JavaScript, compared to writing repetitive code for similar tasks?  
### Q3: Can you provide an example of a web application where event handling significantly enhances user interactivity, and explain how it does so?  
### Q4: What is the function of the `addEventListener` method in JavaScript, and how is it used in the provided example?  
### Q5: When creating a web application, why is it important to understand the different data types supported by JavaScript?  
### Q6: How does JavaScript facilitate the manipulation of the Document Object Model (DOM) and what advantages does this offer for web applications?  
### Q7: How would you explain the concept of JavaScript to someone with no programming background?  
### Q8: What strategies can you use to effectively communicate technical concepts related to JavaScript to non-technical stakeholders?  
### Q9: In your opinion, what are the key elements of effective communication when discussing programming issues in a team setting?