GCP PCD study guide · 2026

The 4 GCP PCD domains, explained

4 domains and 11 official objectives. Designing highly scalable, secure, and reliable cloud-native applications carries the most weight at ~32%. Each guide explains what the domain covers, how its questions are framed and where candidates lose marks.

Start with Domain 1 See all domains
Questions
50–60 (multiple choice)
Time
2 hours
Passing score
Not published by Google
Outline
Professional Cloud Developer exam guide (current April 2026 edition, file 042426; 4 sections, adds AI coding assistants, MCP servers and AI-assisted observability)

Exam blueprint

Bar widths follow the official weights. Weight ranges are drawn at their midpoint.

  1. 1 32%
  2. 2 23%
  3. 3 24%
  4. 4 21%
  1. 1 Designing highly scalable, secure, and reliable cloud-native applications
  2. 2 Building and testing applications
  3. 3 Configuring cloud-native applications for deployment
  4. 4 Integrating applications with Google Cloud services

All 4 domains

11 official objectives 60–78 hrs suggested study

  1. Domain 01 ~32%

    Designing highly scalable, secure, and reliable cloud-native applications

    The largest section of the Professional Cloud Developer exam covers how you design an application before writing it: compute platform, APIs and events, security controls for code and identities, and the right database for each access pattern.

    Inside this domain

    • Designing high-performing applications and APIs
    • Designing secure applications
    • Storing and accessing data

    Watch for Exported service account keys

    Objectives
    3
    Questions est.
    ~16–19
    Study time est.
    20–26 hrs
  2. Domain 02 ~23%

    Building and testing applications

    Section 2 tests the inner and outer development loop: a productive local setup with emulators and AI assistants, container builds in Cloud Build stored in Artifact Registry with provenance, and automated unit and integration tests.

    Inside this domain

    • Setting up your development environment
    • Building
    • Testing

    Watch for Shared test project for unit tests

    Objectives
    3
    Questions est.
    ~11–14
    Study time est.
    12–16 hrs
  3. Domain 03 ~24%

    Configuring cloud-native applications for deployment

    Section 3 checks that you can ship an application onto Google's two main container platforms: deploying Cloud Run services from source and wiring their event triggers and APIs, then running containers on GKE with health checks and autoscaling.

    Inside this domain

    • Deploying applications to Cloud Run
    • Deploying containers to GKE

    Watch for Public service for event delivery

    Objectives
    2
    Questions est.
    ~12–14
    Study time est.
    14–18 hrs
  4. Domain 04 ~21%

    Integrating applications with Google Cloud services

    Section 4 is where application code meets Google Cloud: connecting to datastores and messaging, calling Google APIs efficiently and safely, and instrumenting code so issues can be found with Google Cloud Observability, Error Reporting and AI assistance.

    Inside this domain

    • Integrating applications with data and storage services
    • Consuming Google Cloud APIs
    • Troubleshooting and observability

    Watch for Public IP allowlisting for Cloud SQL

    Objectives
    3
    Questions est.
    ~10–13
    Study time est.
    14–18 hrs

Study the heaviest domains first

Marks follow weight. This order puts the most marks behind you first, across about 60–78 hrs of study.

  1. 1 Designing highly scalable, secure, and reliable cloud-native applications ~32% · 20–26 hrs
  2. 3 Configuring cloud-native applications for deployment ~24% · 14–18 hrs
  3. 2 Building and testing applications ~23% · 12–16 hrs
  4. 4 Integrating applications with Google Cloud services ~21% · 14–18 hrs

Try one

Practice questionDomain 1: Designing highly scalable, secure, and reliable cloud-native applications

A retailer's mobile app needs a database for user shopping lists. Lists change offline on phones and must sync to other devices in near real time when connectivity returns. Traffic is unpredictable and the team wants no servers to manage. Which database should the developer choose?

One trap from every domain

The answer that looks right, and the clue that gives it away.

  • Domain 1

    Exported service account keys

    Clue The workload runs on another cloud, on premises or in a CI system.

  • Domain 2

    Shared test project for unit tests

    Clue Tests interfere with each other or must run offline.

  • Domain 3

    Public service for event delivery

    Clue Eventarc or Pub/Sub deliveries fail with permission errors.

  • Domain 4

    Public IP allowlisting for Cloud SQL

    Clue Cloud Run or GKE must reach Cloud SQL securely.

Other Cloud Computing certifications

Study guides for exams that overlap with GCP PCD.

Practise what you read

GCP PCD domains: common questions

How many domains are in the GCP PCD exam?

GCP PCD has 4 domains with 11 official objectives between them: Designing highly scalable, secure, and reliable cloud-native applications, Building and testing applications, Configuring cloud-native applications for deployment and Integrating applications with Google Cloud services.

Which GCP PCD domain carries the most weight?

Designing highly scalable, secure, and reliable cloud-native applications is the heaviest at ~32%, followed by Configuring cloud-native applications for deployment (~24%). The lightest is Integrating applications with Google Cloud services (~21%). Weights come from Google Cloud's official outline.

What is the GCP PCD exam format?

Questions: 50–60 (multiple choice). Time allowed: 2 hours. Passing score: Not published by Google.

How long should I study for GCP PCD?

Our planning estimate is 60–78 hrs across all domains, split by weight. It is an editorial estimate, not an official figure, so adjust it to your experience and to how you score on practice questions.

Where should I start?

Start with Designing highly scalable, secure, and reliable cloud-native applications, because it carries the most marks, then work down by weight. Use the checklist on each domain page to confirm you can do what the domain asks before moving on.

Which outline is this guide based on?

This guide follows Professional Cloud Developer exam guide (current April 2026 edition, file 042426; 4 sections, adds AI coding assistants, MCP servers and AI-assisted observability), published by Google Cloud. It was last reviewed in October 2026.

Domain names, weights and objectives come from Google Cloud's official outline (Professional Cloud Developer exam guide (current April 2026 edition, file 042426; 4 sections, adds AI coding assistants, MCP servers and AI-assisted observability)). Question counts and study hours are editorial planning estimates, not official figures. Last reviewed October 2026.