Costco Wholesale Full Stack Developer interview questions

Review the EmployeeManager class. Identify and explain the bad practices in the code. Find the bugs that could cause errors during execution. Provide suggestions for improving the code quality and functionality. Consider the following aspects: Code structure and readability. Proper use of data structures. Error handling and edge case considerations. Java coding standards and best practices. Write your review and improvement suggestions. Explain why certain parts of the code are problematic. Suggest specific changes and improvements. import java.util.List; import java.util.ArrayList; public class EmployeeManager { private List employees; public EmployeeManager() { employees = new ArrayList<>(); } // Adds an employee to the list public void addEmployee(String name) { if(name != null || !name.isEmpty()) { employees.add(name); } } // Removes an employee from the list public void removeEmployee(String name) { if(employees.contains(name)) { employees.remove(name); } } // Prints all employees public void printEmployees() { for(int i = 0; i <= employees.size(); i++) { //index out of bounds will throw here System.out.println(employees.get(i)); } } // Finds an employee by name public boolean findEmployee(String name) { for(String employee : employees) { if(employee == name) {// .equals() for string comparision return true; } } return false; } // Adds an employee to a database public void addEmployeeToDatabase(String name, Connection conn) { PreparedStatement stmt = null; try { if (name != null && !name.isEmpty()) { String sql = "INSERT INTO employees (name) VALUES (?)"; stmt = conn.prepareStatement(sql); stmt.setString(1, name); stmt.executeUpdate(); stmt.close(); } } catch (SQLException e) { e.printStackTrace(); } } } }

Given a list of daily flight prices to Maui, return a list such that, for each day in the input, tells you how many days you would have to wait until a cheaper flight is available. If there is no future day for which this is possible, put 0 instead. Example: given the list of flights [350, 349, 348, 225, 415, 300, 500, 200], your output should be [1, 1, 1, 4, 1, 2, 1, 0] For $350, wait 1 day for next lower price of $349 For $349, wait 1 day for next lower price of $348 For $348, wait 1 day for next lower price of $225 For $225, need to wait 4 days for next lower price of $200

You own a small online store, consisting of its own site and a bunch of products presented on it. Your task is to retrieve all the products that are currently contained in the store using the provided REST API. The current site contains the products represented by the following fields: id?- the unique identifier of the product (integer); name?- the name of the product (string); updated_at?- timestamp of the last product update (integer); price?- the price of the product (positive integer); manufacturer?(optional) - the name of the manufacturer. This field is optional, and if it is not presented, then the product is considered to be produced locally, by yourself. To obtain information about the current products from the site, you are given an?API endpoint. Use HTTP requests to obtain information about the current products from this endpoint. API information The API is served at?http://127.0.0.1:8081?and supports the only endpoint: A GET request of the form?http://127.0.0.1:8081/products This endpoint returns a JSON array, containing a list of JSON objects representing the information about the product with the fields described above. For example, the response for this endpoint may look like: [ { "id": 1, "name": "ProductName", "updated_at": 150000000, "price": 100, "manufacturer": "ManufacturerCompanyName" }, { "id": 3, "name": "ProductName 2", "updated_at": 150000230, "price": 90 } ] Your task is to request an API endpoint and print the information of all the products in the following format: Product has price and no manufacturer if product has no manufacturer field, and Product has price and manufacturer otherwise. The information about the products should be returned in the same order as the products were returned in response.

Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k, and nums[i] + nums[j] + nums[k] == 0. Note: the solution set must not contain duplicate triplets. Input: nums = [-1,0,1,2,-1,-4] Output: [[-1,-1,2],[-1,0,1]] Explanation: nums[0] + nums[1] + nums[2] = (-1) + 0 + 1 = 0. nums[1] + nums[2] + nums[4] = 0 + 1 + (-1) = 0. nums[0] + nums[3] + nums[4] = (-1) + 2 + (-1) = 0. The distinct triplets are [-1,0,1] and [-1,-1,2].