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Java: language and application decisions

Learn Java SE 25 through types, objects, collections, streams, concurrency and modules. Practice code interpretation and diagnosis through selection questions.

BigSavantAvailable10 lessons545 estimated study minutes
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BigSavant10 lessons
YOUR LEARNING PLAN

Modules and lessons

Open a lesson to begin. Follow the sequence or revisit any concept.

0 / 10
01

Types, conversions and validation

Follow a value from text input to an operation: distinguish absence, conversion, precision and domain bounds.

45 min
Open lesson02

References, identity and text

Distinguish equality, sharing and copying to prevent unexpected changes across components.

45 min
Open lesson03

Methods, contracts and control flow

Select the right operation and trace paths that can produce effects, end a search or return a result.

45 min
Open lesson04

Objects, interfaces and records

Define contracts, protect state and choose representations that preserve validation, access and equality.

45 min
Open lesson05

Collections, generics and keys

Choose structures, copies and signatures that preserve order, identity, data ownership and duplicate rules.

45 min
Open lesson06

Exceptions, resources and files

Preserve useful failures, manage resources and distinguish paths, reads and publication guarantees.

45 min
Open lesson07

Streams, lambdas and absence

Interpret pipelines and optional results, distinguishing transformations, effects and aggregation policies.

45 min
Open lesson08

Decimals, time and boundaries

Define precision, rounding and temporal boundaries without losing information in conversions.

45 min
Open lesson09

Concurrency, state and cancellation

Protect shared invariants and distinguish waiting, completion, interruption and task effects.

50 min
Open lesson10

Modules, delivery and diagnosis

Relate APIs, modules, versions and artifacts to interpret compilation and deployment failures.

45 min
Open lesson
UNDERSTAND THE PATH

Objectives and progression

Learn Java SE 25 through types, objects, collections, streams, concurrency and modules. Practice code interpretation and diagnosis through selection questions.

Audience

Java learners, developers and support teams needing to interpret code and justify decisions.

Prerequisites

Basic familiarity with variables, conditions and functions. No JDK installation is required to answer assessments.

What you will learn

  • Distinguish conversions, identity, equality and object contracts.
  • Interpret collections, resources and pipelines without losing data or hiding failures.
  • Define precision, temporal boundaries and concurrency rules.
  • Diagnose mismatches between modules, artifacts and runtime.

What is available

10 lessons · 100 regular questions · 20 cases

Internal final assessment: 40 exercises in 90 minutes. Full mock exams are not yet available.

Assessments and mock exams reuse path exercises. They do not award certifications or guarantee passing an external exam.

Scope, review and limitations

Ten lessons with 100 regular questions and 20 original cases. Learn to interpret contracts, predict outcomes and diagnose type, collection, file, time, concurrency and deployment failures. Every assessment uses single or multiple selection; code and scenarios may appear without program execution. The final assessment reuses 40 course items in 90 minutes. Scope covers the Java language and standard library; Spring Boot is a separate path. The reference is Java SE 25 without preview features.

Internal 40-question assessment in 90 minutes, reusing course items, with single or multiple selection and no code execution. It is not an official exam and awards no external certification.

Independent education and assessment with original questions and scenarios. No Oracle affiliation, sponsorship or endorsement, and no official certification award. Java is a registered trademark of Oracle and/or its affiliates.

CONTEXT AND TRANSPARENCY

References and version

Find the sources, content version and scope of this path.

Path content version

Java SE 25; no preview features

Content reviewed on 13 Oct 2026

Learning sources

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Independent preparation. Check the objectives, available content and coverage limits when planning your study.

Independent education and assessment with original questions and scenarios. No Oracle affiliation, sponsorship or endorsement, and no official certification award. Java is a registered trademark of Oracle and/or its affiliates.

Java is a registered trademark of Oracle and/or its affiliates. This independent path is not sponsored or endorsed by Oracle.