Java Online Test

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The Java online test assesses candidates' knowledge of programming in the Java language and their ability to leverage commonly used parts of the Java Class Library.

It's an ideal test for pre-employment screening. A good Java developer needs to be able not only to solve problems using Java but also recognize when to leverage the functionality provided by the Java Class Library to write robust and maintainable code.

This online test requires candidates to solve coding problems in Java and find and fix bugs in a Java program.

Recommended Job Roles
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Java Developer
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Sample Free Questions

Merge Names

10min
  -  
Easy  
  -  
CODE

Java Arrays Public

Implement the uniqueNames method. When passed two arrays of names, it will return an array containing the names that appear in either or both arrays. The returned array should have no duplicates.

For example, calling MergeNames.uniqueNames(new String[]{'Ava', 'Emma', 'Olivia'}, new String[]{'Olivia', 'Sophia', 'Emma'}) should return an array containing Ava, Emma, Olivia, and Sophia in any order.

Palindrome

10min
  -  
Easy  
  -  
CODE

Java Strings Public

A palindrome is a word that reads the same backward or forward.

Write a function that checks if a given word is a palindrome. Character case should be ignored.

For example, isPalindrome("Deleveled") should return true as character case should be ignored, resulting in "deleveled", which is a palindrome since it reads the same backward and forward.

User Input

15min
  -  
Easy  
  -  
CODE

Java OOP Public

User interface contains two types of user input controls: TextInput, which accepts all characters and NumericInput, which accepts only digits.

Implement the class TextInput that contains:

  • Public method void add(char c) - adds the given character to the current value
  • Public method String getValue() - returns the current value

Implement the class NumericInput that:

  • Inherits from TextInput
  • Overrides the add method so that each non-numeric character is ignored

For example, the following code should output "10":

TextInput input = new NumericInput();
input.add('1');
input.add('a');
input.add('0');
System.out.println(input.getValue());
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