Ngân hàng câu hỏi

Lazy loading is a design pattern that delays loading of non-critical resources at page load time, reducing initial load time and page weight.

A load balancer distributes network or application traffic across multiple servers to enhance responsiveness and availability of applications.

Indexing speeds up data retrieval operations by effectively creating a smaller, faster version of the database table.

Event delegation refers to the practice of using a single event listener to manage all events of a specific type for child elements.

A closure is a function that remembers its outer variables and can access them.

Docker allows for packaging applications in containers, facilitating consistent deployment across different environments.

A race condition occurs when the system's behavior depends on the sequence or timing of other uncontrollable events.

Optimizations can include minimizing HTTP requests, using CDNs, compressing files, caching, etc.

SQL databases are structured, use SQL, and are better for complex queries. NoSQL databases are flexible, scale well, and are good for hierarchical data storage.

State in React is an object that holds some information that may change over the lifecycle of the component.