What is a session in web apps?

What is a session in web apps?

• A. A mechanism that lets the website store variables specific for a given visit on the server side
• B. A client-side storage on the browser
• C. A type of cookie
• D. A cryptographic token stored in local storage

Answer: (A)

A session is the server-side mechanism that remembers data for a user’s visit across multiple requests. When you start a session, the server creates a storage area tied to a unique session ID and keeps state like login status, preferences, or items in a cart there. The client only holds the session ID (typically in a cookie), while the actual data lives on the server, so each request can be associated with the correct session. This is why the best answer describes per-visit variables stored on the server. While cookies can carry the session ID, and tokens in local storage are used in other patterns, the session itself is fundamentally a server-side store, not client-side storage, a type of cookie, or a cryptographic token stored locally.

A session is the server-side mechanism that remembers data for a user’s visit across multiple requests. When you start a session, the server creates a storage area tied to a unique session ID and keeps state like login status, preferences, or items in a cart there. The client only holds the session ID (typically in a cookie), while the actual data lives on the server, so each request can be associated with the correct session. This is why the best answer describes per-visit variables stored on the server. While cookies can carry the session ID, and tokens in local storage are used in other patterns, the session itself is fundamentally a server-side store, not client-side storage, a type of cookie, or a cryptographic token stored locally.