Biken Singh submission

Answers to technical questions.md

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+# Answers to Technical Questions
+
+## 1. How long did you spend on the coding test? What would you add if you had more time?
+
+I spent approximately a few hours working on the coding test, focusing mainly on implementing the core functionality and ensuring that the application works correctly.
+
+If I had more time, I would improve the following areas:
+- Refactor the code for better readability and maintainability
+- Add proper error handling and validation
+- Improve UI responsiveness and accessibility
+- Optimize performance, especially for dynamic rendering and API calls
+- Add unit and integration tests to ensure reliability
+- Enhance mobile and cross-browser compatibility
+
+---
+
+## 2. How would you track down a performance issue in production? Have you ever had to do this?
+
+To track down a performance issue in production, I would follow a structured approach:
+
+1. **Identify the issue**
+   - Use monitoring tools (e.g., logs, APM tools like New Relic, Datadog, or application logs)
+   - Check metrics like response time, CPU usage, memory usage, and database latency
+
+2. **Reproduce the issue**
+   - Try to replicate it in a staging environment using similar data and traffic patterns
+
+3. **Analyze bottlenecks**
+   - Inspect slow API calls, database queries, or frontend rendering issues
+   - Use profiling tools (Chrome DevTools, backend profilers, query analyzers)
+
+4. **Fix and validate**
+   - Optimize the problematic code/query
+   - Deploy fixes in a controlled manner and monitor impact
+
+5. **Prevent recurrence**
+   - Add alerts, logging, and performance benchmarks
+
+Yes, I have worked on debugging performance-related issues where I analyzed slow API responses and optimized database queries and frontend rendering logic to improve load times.
+
+---
+
+## 3. Please describe yourself using JSON
+
+```json
+{
+  "name": "Biken Singh",
+  "role": "Full Stack Developer",
+  "skills": [
+    "JavaScript",
+    "React",
+    "Node.js",
+    "PHP",
+    "MySQL",
+    "HTML",
+    "CSS"
+  ],
+  "interests": [
+    "Web Development",
+    "Performance Optimization",
+    "UI/UX Design",
+    "Learning new technologies"
+  ],
+  "strengths": [
+    "Problem solving",
+    "Clean code practices",
+    "Quick learner",
+    "Debugging and optimization"
+  ],
+  "goals": "To become a highly skilled full stack engineer building scalable and efficient web applications"
+}

controllers/SliderController.php

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+<?php
+require_once "../models/Database.php";
+require_once "../models/item.php";
+
+class SliderController {
+
+    private $item;
+
+    public function __construct() {
+        $db = (new Database())->connect();
+        $this->item = new Item($db);
+    }
+
+    public function getData() {
+
+        $result = $this->item->getAll();
+
+        $data = [];
+
+        while ($row = $result->fetch_assoc()) {
+            $data[] = $row;
+        }
+
+        echo json_encode($data);
+    }
+}
+?>

items.sql

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+-- phpMyAdmin SQL Dump
+-- version 5.2.1
+-- https://www.phpmyadmin.net/
+--
+-- Host: 127.0.0.1
+-- Generation Time: Apr 15, 2026 at 12:56 AM
+-- Server version: 10.4.28-MariaDB
+-- PHP Version: 8.2.4
+
+SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
+START TRANSACTION;
+SET time_zone = "+00:00";
+
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8mb4 */;
+
+--
+-- Database: `wpoets_test`
+--
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table `items`
+--
+
+CREATE TABLE `items` (
+  `id` int(11) NOT NULL,
+  `title` varchar(255) NOT NULL,
+  `description` text DEFAULT NULL,
+  `image` varchar(255) DEFAULT NULL,
+  `tab_name` varchar(100) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+
+--
+-- Dumping data for table `items`
+--
+
+INSERT INTO `items` (`id`, `title`, `description`, `image`, `tab_name`) VALUES
+(1, 'E-learning Solutions', 'Interactive learning platforms for education and training', 'public/images/DL-Learning.jpg', 'Learning'),
+(2, 'Training Modules', 'Custom training modules for corporate learning', 'public/images/DL-Communication.jpg', 'Learning'),
+(3, 'Software Development', 'End-to-end software solutions for enterprises', 'public/images/DL-Technology.jpg', 'Technology'),
+(4, 'Cloud Services', 'Scalable cloud infrastructure and deployment services', 'public/images/DL-Technology.jpg', 'Technology'),
+(7, 'Corporate Communication', 'Effective internal and external communication strategies', 'public/images/DL-Communication.jpg', 'Communication'),
+(8, 'Digital Communication', 'Modern digital communication solutions for businesses', 'public/images/DL-Technology.jpg', 'Communication');
+
+--
+-- Indexes for dumped tables
+--
+
+--
+-- Indexes for table `items`
+--
+ALTER TABLE `items`
+  ADD PRIMARY KEY (`id`);
+
+--
+-- AUTO_INCREMENT for dumped tables
+--
+
+--
+-- AUTO_INCREMENT for table `items`
+--
+ALTER TABLE `items`
+  MODIFY `id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=13;
+COMMIT;
+
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

models/Database.php

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+<?php
+
+class Database {
+
+    private $host = "localhost";
+    private $username = "root";
+    private $password = "";
+    private $dbname = "wpoets_test";
+
+    public $conn;
+
+    public function connect() {
+
+        $this->conn = new mysqli(
+            $this->host,
+            $this->username,
+            $this->password,
+            $this->dbname
+        );
+
+        if ($this->conn->connect_error) {
+            die("Database Connection Failed: " . $this->conn->connect_error);
+        }
+
+        return $this->conn;
+    }
+}

models/item.php

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+<?php
+
+class Item {
+
+    private $conn;
+    private $table = "items";
+
+    public function __construct($db) {
+        $this->conn = $db;
+    }
+
+    public function getAll() {
+
+        $query = "SELECT * FROM " . $this->table;
+        $result = $this->conn->query($query);
+
+        return $result;
+    }
+}