Front End Developer Mock Interview
Practice 30 Front End Developer interview questions covering HTML, CSS, JavaScript, frameworks, and performance optimization.
Question 4 of 30
How do you use a closure when you are writing front end code?
How to Answer
Example Answer
Community Answers
William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.
While the use of closure within JavaScript seems straightforward, it can be confusing. Being able to describe how it is used accurately will differentiate you from many other front-end developers. This is a question you are likely to be asked later in the interview due to its complexity. It will indicate that the interviewer is gaining confidence in your ability and is interested in exploring your qualifications in more detail. Even though it's late in the interview, continue to provide answers directly to the point.
William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.
"A closure is a JavaScript function that can access an outer function scope's variables and functions even after the function has finished. It can be used to implement encapsulation, iterators, and singleton in JavaScript. The closure also enables callbacks, event handlers, and higher-order functions to access outer variables. Finally, a closure will allow you to write functions that can capture data from a site at a specific moment in time."
Write Your Answer
0 - Character Count
Unlock All 30 Front End Developer Questions
Prepare for technical screens and live coding challenges with professional interviewer insights.
Get StartedJump to Question