Java 11 Certification Exam Questions

Preparing for Java SE 11 Developer Certification Exam 1Z0-819?

Here you can find practice questions for each objective. We will be adding more questions to each objective in the coming weeks. So please continue visiting us to check out the new questions being added. If you find any errors/misses, please let us know by posting a message here. Happy Learning!

Topic: Working with Java data types

  • Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
  • Handle text using String and StringBuilder classes
  • Use local variable type inference, including as lambda parameters

For practice questions on this objective, visit the following links

http://talks.skilltoz.com/how-to-use-var-keyword-in-java/

http://talks.skilltoz.com/how-do-we-join-strings-in-java/

http://talks.skilltoz.com/how-do-we-use-stringbuilder-in-java/

Topic: Java Object-Oriented Approach

  • Declare and instantiate Java objects including nested class objects, and explain objects’ lifecycles (including creation, dereferencing by reassignment, and garbage collection)
  • Define and use fields and methods, including instance, static and overloaded methods
  • Initialize objects and their members using instance and static initialiser statements and constructors
  • Understand variable scopes, apply encapsulation and make objects immutable
  • Create and use subclasses and superclasses, including abstract classes
  • Utilize polymorphism and casting to call methods, differentiate object type versus reference type
  • Create and use interfaces, identify functional interfaces, and utilize private, static, and default methods
  • Create and use enumerations

For practice questions on this objective, visit

http://talks.skilltoz.com/how-to-use-classes-interfaces-in-java/

http://talks.skilltoz.com/how-to-use-enum-in-java/

http://talks.skilltoz.com/garbage-collection-questions/

Topic: Working with Arrays and Collections

  • Use generics, including wildcards
  • Use a Java array and List, Set, Map and Deque collections, including convenience methods
  • Sort collections and arrays using Comparator and Comparable interfaces

For practice questions on this objective, visit

http://talks.skilltoz.com/varargs-java-quiz/

http://talks.skilltoz.com/how-to-use-arrays-and-collections/

Topic: Java Platform Module System

  • Deploy and execute modular applications, including automatic modules
  • Declare, use, and expose modules, including the use of services

For practice questions on this objective, please visit

http://talks.skilltoz.com/how-to-use-modules-in-java/

Topic: Java I/O API

  • Read and write console and file data using I/O Streams
  • Implement serialization and deserialization techniques on Java objects
  • Handle file system objects using java.nio.file API

For practice questions on this objective, visit

http://talks.skilltoz.com/how-to-handle-files-in-java/

http://talks.skilltoz.com/serialization-and-deserialization-in-java/

Topic: Database Applications with JDBC

  • Connect to and perform database SQL operations, process query results using JDBC API

For practice questions on this objective, visit

http://talks.skilltoz.com/how-do-we-execute-a-preparedstatement/

Topic: Annotations

  • Create, apply, and process annotations

For practice questions on this objective, visit

http://talks.skilltoz.com/annotations-in-java/

Topic: Controlling Program Flow

  • Create and use loops, if/else, and switch statements

For practice questions on this objective, please visit these links

http://talks.skilltoz.com/how-do-we-use-the-for-loop-in-java/

http://talks.skilltoz.com/java-quiz-foreach-construct/

http://talks.skilltoz.com/how-do-we-use-the-switch-statement-in-java/

http://talks.skilltoz.com/how-do-we-use-the-if-else-statement-in-java/

Topic: Exception Handling

  • Handle exceptions using try/catch/finally clauses, try-with-resource, and multi-catch statements
  • Create and use custom exceptions

For practice questions on this objective, please visit

http://talks.skilltoz.com/how-to-handle-exceptions-in-java/

Topic: Working with Streams and Lambda expressions

  • Implement functional interfaces using lambda expressions, including interfaces from the java.util.function package
  • Use Java Streams to filter, transform and process data
  • Perform decomposition and reduction, including grouping and partitioning on sequential and parallel streams

For practice questions on this objective, please visit

http://talks.skilltoz.com/functional-interfaces-and-lambda-expressions/

http://talks.skilltoz.com/how-to-use-java-streams/

http://talks.skilltoz.com/how-to-use-optional-in-java-quiz/

Topic: Concurrency

  • Create worker threads using Runnable and Callable, and manage concurrency using an ExecutorService and java.util.concurrent API
  • Develop thread-safe code, using different locking mechanisms and java.util.concurrent API

For practice questions on this objective, please visit

http://talks.skilltoz.com/how-to-use-threads-in-java/

Topic: Secure Coding in Java SE Application

  • Develop code that mitigates security threats such as denial of service, code injection, input validation and ensure data integrity
  • Secure resource access including filesystems, manage policies and execute privileged code

For practice questions on this objective, please visit

http://talks.skilltoz.com/how-to-code-securely-in-java/

Topic: Localization

  • Implement Localization using Locale, resource bundles, and Java APIs to parse and format messages, dates, and numbers

For practice questions on this objective, please visit

http://talks.skilltoz.com/localization-in-java/

Leave a Reply

Your email address will not be published. Required fields are marked *