EXAM: Java Spring

Getting Started

• Fork this repository under your own account
• Clone the forked repository to your computer
• Please commit frequently, but push only ONCE at the end of the exam
• Go through the whole description before starting it

What can I use?

• You can use any resource online, but please work individually
• Instead of copy-pasting your answers and solutions, write them in your own words
• Don't push your work to GitHub until your mentor announces that the time is up

Tasks

Setup a new project

• Create a new Spring Boot project inside your cloned repository
• Setup .gitignore file to exclude the IDE's generated files
  • the src directory should be committed (containing all java and resource files)
  • the gradle related files should be committed
  • the resource folder should be committed
  • the gitignore should be committed
• Create a package called com.greenfox.exam.spring and work under that

Green Fox Quiz API

Description

Your task is to create a RESTful quiz application with full of greenfox questions hence giving the possibility to make it reachable and reuseable by any other services.

Get 5 random questions

• Create a GET /questions endpoint
• Get 5 random questions in JSON object from an SQL database that you create
• the JSON object should be:

{
  "id": 1,
  "questions":[
    {"id": 1, "question": "What is the color code of Green Fox?"},
    {"id": 2, "question": "When was Green Fox founded?(yyyy.mm.)"},
    ...
   ]
}

• Below you can find some more question and answer example, please add them all to the database, to one table:
  • When did your course start? (yyyy.mm.dd)(2017.03.13)
  • What type of dog Barbi has? (Whippet)
  • What is HerrNorbert's favourite color? (Green)
  • How many classes are learning at Green Fox Academy at this moment? (4)
  • How many mentors teach at Green Fox at this moment? (16)
  • What was the name of the first Green Fox class? (Vulpes)
  • How many likes do we have on facebook? (~3300)
  • What is Tojas's horoscope? (Libra)
• Feel free to add some new, if you have the time

Give the answer

• Create a POST /answers endpoint
• Post the answers to the 5 random questions
• Make sure that the user answers to exactly the 5 random questions that he/she got
• This endpoint should receive the following input

{
  "id": 1,
  "answers":[
  {"id": 1, "answer": "#3CB879"},
  {"id": 2, "answer": "2015.09."},
  ...
  ]
}

• Regarding the response, continue reading

Response of POST endpoint

• In the case that all of the given answers are CORRECT you should get a list of projects in this endpoint
• In case some of the answers are not correct you should get back an empty list
• The list of projects will be the highly awaited titles of the actual projects you will work on in the project phase :)
• The response format should be the following:

{
  "projectList":[
    {"id":1,"nameOfProject":"Porject 1"},
    {"id":2,"nameOfProject":"Project 2"},
     ...
   ]
}

• You should send an HTTP request to this endpoint "https://springexamserver.herokuapp.com/projects/className" and make it as the response of the POST endpoint
• Instead of "className" goes the name of your class
• If you got to this point you probably noticed that the project names are encrypted
• Use Base64 to decode the names http://www.rgagnon.com/javadetails/java-0598.html

Endpoint TESTing

• Create 2 endpoint tests all together or per endpoint.

Question time!

In what cases would you choose to use an abstract class over an interface?

Please define it with your own words. We are expecting at least 3 distinct ideas that you write here:

Their common thing is that neither of them can be instantiated. But while abstract classes are groupings of things (with actual properties and behaviors) which we want to specify more before talking about a specific individual (instance), interfaces are only groups of behaviors which are not even implemented yet.

A class can extend only one other class (abstract or not), but it can implement multiple interfaces, IOW it cannot be the child of different parents (which are not in a parent-child relationship) but it can have the behaviors of different interfaces.

Analyzing URL

Please name the parts of the URL below.

1. • protocol / scheme
2. • sub-domain
3. • domain name
4. • port
5. • (file) path
6. • ? marking the start of the query string
7. • query string: parameter names and (after '=') values