JavaScript implements answer scoring

With the rapid development of the Internet, learning is no longer limited to learning in the classroom with the traditional education model. Online education has become the choice of more and more people. However, a problem in online education is how to implement answer scoring, especially in large-scale examinations.

As a front-end development language, JavaScript is widely used in answering questions and scoring. This article will introduce an implementation method of an online question answering scoring system based on JavaScript.

1. Problems and requirements

The online question answering and scoring system needs to solve the following problems:

1. Storage of questions and answers: questions and answers need to be stored in the system .
2. User answering questions: Users need to be able to answer questions in the system and submit answers.
3. Rating of answers: The system needs to rate the answers submitted by users and return the scoring results.
4. Front-end display: The scoring results need to be displayed on the front-end page.

2. Core Technology

The implementation of the online question answering and scoring system requires the following core technologies:

1. HTML/CSS: used to build the front-end page.
2. JavaScript: used to implement the logic and functions of the system.
3. jQuery plug-in: used to conveniently operate HTML elements and handle events.
4. PHP: used for data interaction and storage with the backend.
5. MySQL database: used to store questions and answers.

3. Implementation steps

1. Design database

Design question table and answer table based on demand analysis. The question table contains fields such as question ID, question content, options, and answers, and the answer table contains fields such as answer ID, question ID, user ID, and user answer.

2. Write back-end code

Use PHP to write code to interact with the database and store data. Code functions such as question query, answer storage, user answer submission and query.

3. Write the front-end page

Use HTML and CSS to design the front-end page, and use the jQuery plug-in to conveniently operate HTML elements and handle events. Display the questions and options on the front-end page, and add a click event to the answer button so that users can select answers. After the user submits the answer, the front-end page displays the scoring results.

4. Write JavaScript logic code

Use JavaScript code to implement the logic and functions of the front-end page. After the user submits the answer, the back-end PHP script file is called to store and calculate the data. Data interaction with the backend is achieved through AJAX technology. After the scoring results are returned, the results are displayed on the front-end page.

5. Code Example

The following is an example of JavaScript code implementation:

// 给答案按钮添加单击事件 $('.answer-btn').click(function() { // 获取答案 var answer = $(this).attr('data-answer'); // 获取问题ID和用户ID var question_id = $(this).attr('data-question-id'); var user_id = $(this).attr('data-user-id'); // 发送AJAX请求计算评分 $.ajax({ type: "POST", url: "calc_score.php", data: { question_id: question_id, user_id: user_id, answer: answer }, success: function(response) { // 显示评分结果 $('.score').text(response); } }) });

6. Summary

Implementing an online question answering scoring system through JavaScript can be convenient Easily realize the answer scoring function in large-scale examinations. This system is a lightweight answer scoring system based on front-end language. It can be customized and developed according to actual needs to improve the efficiency and quality of education and training.

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