This exam is to gauge your proficiency in writing code in Javascript. It is administered in two parts and should take you 1 to 2 hours to complete.

You will need to set up development environment for running the enclosed files.

• Install Node.js version 10+
• Install the node package manager version 6+ (npm)

You can find instructions for your operating system at: https://nodejs.org/en/download/

After you have installed nodejs and npm, open your command line and navigate to the location you have cloned this project; Run:

npm install

This will add the test runner, mocha, and assertion library, chai. You can now run the tests in test.js with the command npm test. At this point all tests will fail.

• Create a new branch, your-name, and push your changed files there. When you are finished create a pull request with your solutions.
• We have tried to make the expectations straight forward; there are no trick questions or brain teasers.
• Neatness counts.

Running npm test will revel 6 failing tests. Open the file ./src.js and update the bodies of findUniqueNumbers, sortArray, and isPalindrome until all the tests pass.

Create a new file with a function: primeFactors(). Write a series of tests and implementation that takes a number and returns an array of the prime factors of the that input. To run your new test file you will need to update the scripts section of the package.json file. See the online documentation for mocha if you need more information.

Example tests:

• primeFactors(1): []
• primeFactors(2): [2]
• primeFactors(4): [2, 2]