Which JavaScript feature is commonly used to optimize code performance and reduce load times on web pages?
A). Event handling
B). Asynchronous functions
C). External references
D). Code optimization techniques
What is the primary purpose of animation and effects in JavaScript?
A). To enhance user experience
B). To improve code performance
C). To handle database queries
D). To compress and minify code
How does JavaScript contribute to creating visually appealing web interfaces?
A). By handling server-side operations
B). By utilizing CSS for styling
C). By compressing and minifying code
D). By optimizing database queries
What is the primary advantage of using event listeners in JavaScript?
A). Improved code readability
B). Reduced code complexity
C). Better performance
D). Responsive and interactive web applications
How can JavaScript be used to handle user interactions on web pages?
A). By defining external references
B). By using event listeners
C). By including CSS stylesheets
D). By executing server-side code
How can data display and formatting be achieved using JavaScript?
A). By handling database queries
B). By utilizing regular expressions
C). By formatting strings, dates, and numbers
D). By creating external APIs
How can JavaScript be utilized to format data such as dates and numbers?
A). By using external references
B). By manipulating the DOM
C). By defining regular expressions
D). By using built-in methods and functions
How can JavaScript be used to handle user input validation on web forms?
A). By utilizing external APIs
B). By defining regular expressions
C). By executing server-side code
D). By creating event listeners
How does JavaScript contribute to improving the user interface of web applications?
A). By reducing server load
B). By enhancing code organization
C). By optimizing database queries
D). By compressing and minifying code
How can event handling be utilized in JavaScript?
A). To modify CSS styles
B). To validate form data
C). To respond to user interactions
D). To connect to a database