Which technique is commonly used in JavaScript to dynamically create and add elements to the DOM?

What is the primary purpose of DOM manipulation in JavaScript?

A). Modifying the structure and content of HTML elements dynamically

B). Validating user input

C). Handling server-side operations

D). Creating external references

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

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

How can JavaScript be utilized to create responsive web applications?

A). By handling external references

B). By defining CSS stylesheets

C). By implementing error handling

D). By utilizing event-driven programming

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 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 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

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

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