Web development technologies
Databases (SQL or NoSQL)
Git or Other Version Control Systems
Experience with Agile Methodologies
Unit/integration testing experience
A good answer to this question would be; let, const, and var are used to declare variables. The main difference between them is the scope and mutability of the variable. Var is function-scoped and can be redeclared within the same range, while let and const are block-scoped and cannot be redeclared within the same scope. Const is also immutable, meaning its value cannot be reassigned once initialized, while let is mutable and can be reassigned. The developer knowing when to choose between let, const, and var depends on the use case and the desired behavior of the variable.
How would you optimize the performance of a slow-loading web page?
Optimizing the performance of a slow-loading web page can involve several techniques. First, minimizing the page size by compressing images, minifying code, and reducing the number of HTTP requests is essential. Second, optimizing the loading order of resources can improve perceived performance. Critical resources should be loaded first, while non-critical resources can be loaded later or in the background. Finally, caching and browser storage can be used to reduce server requests and improve loading times for returning users.