Java certification

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Our Java test will help you understand your proficiency with programming in Java 8. This test covers the following topics: Class Definition, Core Libraries, Integration Libraries, Practical Software Engineering, Support Libraries, Syntax, Tools, and Virtual Machine. This test covers J2SE 1.2 through Java 8. Difficulty level: for experienced programmers.

Number of questions: 100
Time limit for question: 60 seconds

Given - A and E are classes - B and D are interfaces - C is an abstract class Which is correct?

Choose one:
  • `class F implements B, C { }`
  • `class F implements B { }`
  • `class F extends E { }`
  • `class F extends A, E { }`
  • `class F implements B, D { }`

What is the use of `final` keyword in Java?

Choose one:
  • When a class is made final, a sublcass of it can not be created.
  • When a method is final, it can not be overridden.
  • When a variable is final, it can be assigned value only once.
  • All of the above

Which of the following is a thread safe?

Choose one:
  • StringBuilder
  • StringBuffer
  • Both of the above
  • None of the above

Our certificates

Getting your career started and need to impress a potential employer? We can conduct any of our tests in a manner that will allow us to verify your identity and check that the test result is indeed your own work. If you pass the test, we will issue a certificate just like the one pictured. You will be then able to obtain both an electronic certificate suitable for sharing on Facebook and Linkedin, a corresponding badge on your personal page, and a downloadable PDF version for printing.

Certificate authencity can be verified with a special tool. Simply enter the certificate ID to verify claims of completion.

PDF version:
Online competence badge:
Certified in Java
2017-11-18 #xxxx-xxx-xxx-xxx

Price: $5

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