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A four-week plan for a system design interview. Learn seven concepts in order, then run timed designs on new prompts and review each one against what Meta and Amazon say they assess.

Design a notification system for push, email and SMS in an interview, with the scale and campaign arithmetic and the provider rules behind retries, duplicates and expiry.

SAA-C03 scores 50 of its 65 questions across four weighted domains. Split 50 study hours by those weights, then keep a sixth week for one fresh timed run of AWS's official practice exam.

The AWS Certified AI Practitioner exam costs 100 USD per attempt, and a retake costs the same. If you have passed another AWS exam, the 50% voucher in your AWS Certification Account halves it, as long as you use it before it expires.

Microsoft weights the four AZ-305 domains from 15-20% to 30-35%. Split your study hours by those weights and practice each domain on Microsoft's free case studies.

AI-900 retired on June 30, 2026, and AI-901 now earns the Azure AI Fundamentals certification. Existing holders keep it, and AI-900 notes on responsible AI, workloads, text, speech and generative AI still match AI-901 objectives.

AI-901 is 40-45% AI concepts and 55-60% building with Microsoft Foundry. Give the concepts one week, give Microsoft's Foundry labs two, and write the Python client for each lab yourself.

Exam AI-901 costs $99 USD in the United States, before tax. Retakes are paid again, a late booking change forfeits the fee, and the certification does not expire.

Book SAA-C03 when two fresh timed practice results sit around 80% or better and the wrong answers trace to scattered details, with 720 as the passing score.

The ServiceNow CSA exam has 60 questions in 90 minutes across six domains, and this study plan works them in weight order over six weeks.

The CSA blueprint lists no fee, and the price is shown at registration in ServiceNow University. A retake costs the full fee again.