Certification prep

Practice for your certification.

Full-length, exam-style mock tests plus an adaptive Gap Engine that keeps drilling the domains you keep missing. Buy the book, scan the printed code, and the full online practice bank unlocks free — kept current as the exam changes.

210 exams live now

Amazon Web Services

Microsoft

Google Cloud

Anthropic · Claude

NVIDIA

Kubernetes & Cloud Native (CNCF)

Cisco

CompTIA

Palo Alto Networks

ISC2

ISACA

IAPP · Privacy

Network & Security Vendors

HashiCorp

GitHub

Databricks

Snowflake

Salesforce

UiPath

Data, Linux & Developer

Confluent · Apache Kafka

dbt Labs

Project, Service & Quality Management

Finance, Audit & Compliance

Human Resources

Healthcare

Insurance & Real Estate

CertNexus

More certifications

Buy the book. The practice comes free.

Every exam ships as a Kindle and paperback study guide with full-length mock tests. The printed code inside unlocks the online Gap Engine free — every question, the timed mock, and your readiness score — and it stays unlocked through every attempt.

Unlock with your book code →How it works