QuizApplication

Quizzy is a web Application built using NodeJs and React. The database used for storing the questions and user scores is NOSQL(MongoDB).

Model for Question

{
  "question" : "<Question, string>",
  "options" : "<options, Array>"
}

Model for option

{
  "label" : "<Label, string>",
  "value" : "<Option Value, string>"
  "isCorrect" : "<boolean>"

}

Sample Question from database

{
  "question":
      "At what age can someone first attend an R-rated movie without an accompanying adult?",
"options": [
      {"label": "A", "value": "15", "isCorrect": false },
      {"label": "B", "value": "17", "isCorrect": false },
      {"label": "C", "value": "18", "isCorrect": true },
      {"label": "D", "value": "21", "isCorrect": false }
    ]

}

Features

Backend

The API is able to do the following

• Get Random Question from database and present to user.
• Check if the slected option is correct
• Save the user name and score
• Get all scores of quizes played before
• Scores are arranged in descending order
• Seeding data from js file to database

Running API Only

1. Run the command npm install to install all the dependencies
2. Run : npm run prod or npm run dev
3. API can be access on localhost:5000/api

Routes

API is tested using postman and data sent in post request is in json format

Getting Random Question

GET Request to http://localhost:5000/api as example :

{
    "_id": "618233d62dd2b8ebd567a1ce",
    "question": "In what decade did Israel become an independent state?",
    "options": [
        {
            "label": "A",
            "value": "1920s",
            "_id": "618233d62dd2b8ebd567a1cf"
        },
        {
            "label": "B",
            "value": "1940s",
            "_id": "618233d62dd2b8ebd567a1d0"
        },
        {
            "label": "C",
            "value": "1950s",
            "_id": "618233d62dd2b8ebd567a1d1"
        },
        {
            "label": "D",
            "value": "1960s",
            "_id": "618233d62dd2b8ebd567a1d2"
        }
    ],
    "__v": 0
}

As Validation at this time user the isCorrect is hidden in option object from response

Checking Answer for a Question

POST Request to http://localhost:5000/api as example :

{
    "id" : "618233d62dd2b8ebd567a1ce",
    "answer" : "1920s"
}

{
    "success": false
}

Saving User Score

POST Request to http://localhost:5000/api/score as example :

{
    "name":"Vihaan",
    "score" : "45"
}

{
    "name": "Vihaan",
    "score": 45,
    "_id": "6182d9f1e71ed10011812112",
    "__v": 0
}

Get top 10 high scores

GET Request to http://localhost:5000/api/score as example :

{
    [
    {
        "_id": "6182d9f1e71ed10011812112",
        "name": "Vihaan",
        "score": 45,
        "__v": 0
    },
    {
        "_id": "6182c4bd819538b8aa37a4f2",
        "name": "Saini",
        "score": 0,
        "__v": 0
    },
    {
        "_id": "6182c50a819538b8aa37a4fa",
        "name": "Test",
        "score": 0,
        "__v": 0
    },
    
]
}

Seeding data from js file to database

• Data folder in the backend directory holds the question data in Question.js file.
• To add this data to database follow steps below
• Navigate to main folder(Quiz App)
• Run Command npm seed

Frontend is built using React

• Redux is used for state management throughout application
• Axios is used for communicating with backend
• React Router for routing the components

Running Frontend Only

1. Navigate to frontend directory
2. Run the command npm install to install all the dependencies
3. Run : npm start
4. API can be access on localhost:3000/
5. No External Styling libaray is used

HomeScreen

• Home Screen can be accessed on http://localhost:3000
• Home screen promps user to enter name
• As a validation form don't get submitted unless any name is not entered

QuestionScreen

• Question Screen can be accessed on http://localhost:3000/question
• Question Screen can only be accessed only when the user name is entered on homescreen
• User can leave quiz anytime, the current score will be saved

Wrong Answer Screen

• Wrong answer screen is not accessible to user directly
• It will appear only when user choose the wrong option out of 4 options

Scores Table Screen

• Scores Table Screen can be accessed on http://localhost:3000/scoretable
• Table of Highest scores will be presented to user

Running both frontend and backend together

• Make sure dependencies for both frontend and backend is installed
• Navigate to Quiz APP folder
• Run command npm start
• This script make use of concurrently package manager