MongoDB Architecture & The BSON Format

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Understand the document model, Collections, and why MongoDB stores data in high-performance Binary JSON (BSON).

Documents & Collections

In MongoDB, records are stored as flexible documents that map directly to native objects in modern programming languages. Collections are groups of documents, analogous to tables in SQL.

Sample MongoDB Document Structure

Try It Yourself »

db.users.insertOne({
  username: "sam_dev",
  email: "sam@example.com",
  skills: ["React", "Node.js", "MongoDB"],
  profile: {
    title: "Senior Full-Stack Engineer",
    level: 7
  },
  createdAt: new Date()
});

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Test Yourself With Exercise

+15 XP

What binary format does MongoDB use internally to store document data on disk?

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