Can you list the main types of synchronous methods used in programming?

The main types of synchronous methods in programming usually include:

• Pure functions — return results immediately without side effects or delays.
• File or data read/write methods — block execution until the operation completes.
• Computational functions — perform calculations and return results without asynchrony.

In the context of Node.js, synchronous methods often have a Sync suffix, e.g., fs.readFileSync(), which blocks the thread until the operation finishes. Such methods are convenient for simple scripts but are not recommended for server applications due to event loop blocking.