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

Java Developer
Back-End Developer
Web Developer

Sample Candidate Report


Sample Free Questions

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());

Folders

20min
  -  
Hard  
  -  
CODE

Java Serialization Public

Implement a function folderNames, which accepts a string containing an XML file that specifies folder structure and returns all folder names that start with startingLetter. The XML format is given in the example below.

For example, for the letter 'u' and an XML file:

<?xml version="1.0" encoding="UTF-8"?>
<folder name="c">
    <folder name="program files">
        <folder name="uninstall information" />
    </folder>
    <folder name="users" />
</folder>

the function should return a collection with items "uninstall information" and "users" (in any order).

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