Protobuf Practice

Edit the schema, wait for the descriptor checks, and continue when everything passes.

Progress

Exercise 1: Field Numbers

1. Field Numbers

Context

Every protobuf field needs a numeric tag. The tag is what appears in the binary payload; the field name is for generated code and JSON. A valid field declaration looks like this:

message Example {
  string some_field = 1;
}

This schema defines `UserProfile`, but its fields are missing tag numbers.

Task

Assign unique field numbers to id, name, and email so the schema compiles.

Basics > Field Numbers

schema.proto

Valid Schema

syntax = "proto3";

package practice;

message UserProfile {
  string id;
  string name;
  string email;
}

EVALUATION_CHECKS

The Protobuf schema compiles successfully.

Message 'UserProfile' is defined.

All fields (id, name, email) are assigned unique numbers.

Exercise Incomplete

Please satisfy all checks above

Basics

Write practical schemas with messages, fields, and types.

Advanced

Evolve messages without breaking deployed systems.

Binary

Decode wire-format bytes one field at a time.