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Oracle 1Z0-830 Study Plan (30 / 60 / 90 Days)

30/60/90-day study plan for Java SE 21 Developer Professional (1Z0-830): recommended hours, weekly schedules, and practice integration.

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Oracle 1Z0-830 Study Plan (30 / 60 / 90 Days)

Java certs improve quickly with daily code practice. Most candidates pass with 60–120 focused hours.

Your time Recommended timeline
18–22 hrs/week 30 days (intensive)
10–14 hrs/week 60 days (balanced)
6–9 hrs/week 90 days (part‑time)

30‑Day Intensive Plan (4 weeks)

Week Focus Output
1 Core syntax + OOP + records/sealed awareness Topics 1–2 + drills
2 Generics + collections + streams Topics 3–4 + drills
3 Exceptions + I/O + functional interfaces Topic 5 + mixed sets
4 Concurrency + review + readiness mixed sets + revision

Open practice: /app/cloud/#/topic-selection/oracle_1z0-830

Overview
Syllabus