Oracle 1Z0-829 Practice Exam Questions & Answers

Use primitives and wrapper classes including Math API, parentheses, type promotion, and casting to evaluate arithmetic and boolean expressions. Manipulate text including text blocks using String and StringBuilder classes, and manipulate date, time, duration, period, instant and time-zone objects using Date-Time API.

Sample question from this domain above: Q3

Create program flow control constructs including if/else, switch statements and expressions, loops, and break and continue statements.

Sample question from this domain above: Q1

Declare and instantiate Java objects including nested class objects and explain the object life-cycle. Create classes and records with instance and static fields, methods, constructors, and initializers. Implement inheritance, polymorphism, abstract and sealed classes, and use interfaces with private static and default methods.

Sample question from this domain above: Q4

Handle exceptions using try/catch/finally, try-with-resources, and multi-catch blocks including custom exceptions.

Sample questions from this domain above: Q2Q5

Create Java arrays, List, Set, Map, and Deque collections and add, remove, update, retrieve and sort their elements.

Use Java object and primitive streams including lambda expressions implementing functional interfaces to supply, filter, map, consume, and sort data. Perform decomposition, concatenation, reduction, grouping and partitioning on sequential and parallel streams.

Define modules and their dependencies exposing module content including for reflection. Define services, producers, and consumers. Compile Java code and produce modular and non-modular jars, runtime images, and implement migration using unnamed and automatic modules.

Create worker threads using Runnable and Callable and manage thread lifecycle including automations provided by different Executor services and concurrent API. Develop thread-safe code using different locking mechanisms and concurrent API. Process Java collections concurrently including parallel streams.

Read and write console and file data using I/O Streams. Serialize and de-serialize Java objects. Create, traverse, read, and write Path objects and their properties using java.nio.file API.

Create connections, create and execute basic, prepared and callable statements, process query results and control transactions using JDBC API.

Implement localization using locales, resource bundles, parse and format messages, dates, times, and numbers including currency and percentage values.