Oracle Java Certification Exams

There are 800,000 Java developers and 30,000 java developer get Oracle Java Certification Exams every year. This clearly indicates that  how popular this programming language is. The java community is using the knowledge, skills and recognition learned through Oracle Java Certification Exams to improve their job prospects, earn more money and become more valuable employees for their employer. Ultimately, … read the rest

OCJP Practice Papers – Java Concurrency

OCJP Practice Papers –Java Concurrency include following topics

  • Create worker threads using Runnable, Callable and use an ExecutorService to concurrently execute tasks
  • Identify potential threading problems among deadlock, starvation, livelock, and race conditions
  • Use synchronized keyword and java.util.concurrent.atomic package to control the order of thread execution
  •  Use java.util.concurrent collections and classes including CyclicBarrier and CopyOnWriteArrayList
  • Use parallel Fork/Join Framework
  • Use
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OCJP Practice Papers – Selected Classes from Java API

OCJP Practice Papers –Selected Classes from Java API include following topics

  • Manipulate data using the StringBuilder class and its methods
  • Create and manipulate Strings
  • Create and manipulate calendar data using classes from java.time.LocalDateTime, java.time.LocalDate, java.time.LocalTime, java.time.format.DateTimeFormatter, java.time.Period
  • Declare and use an ArrayList of a given type
  • Write a simple Lambda expression that consumes a Lambda Predicate expression

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OCJP Practice Papers – Handling Exceptions

OCJP Practice Papers –Java Handling Exceptions include following topics

  • Differentiate among checked exceptions, unchecked exceptions, and Errors
  • Create a try-catch block and determine how exceptions alter normal program flow
  • Describe the advantages of Exception handling
  • Create and invoke a method that throws an exception
  • Recognize common exception classes (such as NullPointerException, ArithmeticException, ArrayIndexOutOfBoundsException, ClassCastException)

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OCJP Practice Papers – Working with Inheritance

OCJP Practice Papers –Java Stream API include following topics

  • Describe inheritance and its benefits
  • Develop code that makes use of polymorphism; develop code that overrides
  • methods; differentiate between the type of a reference and the type of an object
  • Determine when casting is necessary
  • Use super and this to access objects and constructors
  • Use abstract classes and interfaces

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OCJP Practice Papers – Working with Methods and Encapsulation

OCJP Practice Papers –Java Stream API include following topics

  • Create methods with arguments and return values; including overloaded methods
  • Apply the static keyword to methods and fields
  • Create and overload constructors; differentiate between default and user defined constructors
  • Apply access modifiers
  • Apply encapsulation principles to a class
  • Determine the effect upon object references and primitive values when they are passed
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OCJP Practice Papers – Java I/O Fundamentals

OCJP Practice Papers –Java I/O Fundamentals include following topics

  • Read and write data from the console
  • Use BufferedReader, BufferedWriter, File, FileReader, FileWriter,
    FileInputStream, FileOutputStream, ObjectOutputStream, ObjectInputStream, and PrintWriter in the java.io package

See the complete syllabus for OCJP here

 

1. Fill in the blanks: Writer is__________ that related stream classes__________ .
A. a concrete class, extend
B. an abstract … read the rest