If you've been eagerly preparing for the Uber online coding assessment, the wait is almost over. On Thursday, June 27, 2024, at midnight Pacific Time, the link to the CodeSignal test will be open. Remember, you'll have four days to complete it from the time you receive the invitation. Make sure you use the same email address you used for your Uber application to create your CodeSignal account, ensuring proper tracking.

如果你一直在为Uber的OA做准备，那么你的等待即将结束。2024年6月27日星期四午夜（太平洋时间），CodeSignal测试链接将会开放。请记住，从收到邀请之时起，你将有四天时间来完成测试。请确保使用你在Uber申请中使用的相同电子邮件地址来创建你的CodeSignal账户，以确保正确跟踪。

Analyzing a Previous Uber Interview Question

While the exact questions for the upcoming assessment are unknown, reviewing past questions can provide a good practice opportunity. Let's take a look at a previous Uber interview question focused on verifying a Sudoku solution.

虽然即将到来的评估题目尚不清楚，但回顾过去的题目可以提供很好的练习机会。让我们看看一道过去的Uber面试题，重点在于验证一个数独解决方案。

Codewriting

Sudoku is a number-placement puzzle. The objective is to fill a 9 x 9 grid with digits so that each column, each row, and each of the nine 3 x 3 sub-grids that compose the grid contain all of the digits from 1 to 9.

This algorithm should check if the given grid of numbers represents a correct solution to Sudoku.

Example

For the first example below, the output should be true. For the other grid, the output should be false: each of the nine 3 x 3 sub-grids should contain all of the digits from 1 to 9.

Constraints

• [execution time limit] 3 seconds (java)
• [memory limit] 1 GB
• [input] array.array.integer grid
  • A matrix representing a 9 x 9 grid already filled with numbers from 1 to 9.
• [output] boolean
  • true if the given grid represents a correct solution to Sudoku, false otherwise.

Solution Analysis

To solve this problem, you can iterate through the grid to check each row, column, and 3x3 sub-grid for duplicate values. Here's a brief algorithm outline:

1. Rows Check: Iterate through each row and use a set to track numbers. If a duplicate is found, return false.
2. Columns Check: Do the same for columns.
3. 3x3 Sub-grids Check: Iterate through each 3x3 sub-grid and check for duplicates.

By breaking down the problem into these smaller checks, you can efficiently verify the Sudoku grid's validity.

Good luck on your upcoming Uber online assessment! Preparing by practicing these types of problems will definitely help you perform better.

解决方案分析

为了解决这个问题，可以遍历网格来检查每一行、每一列和每一个3x3的子网格是否有重复的值。以下是算法的大致轮廓：

1. 行检查：遍历每一行并使用一个集合来跟踪数字。如果发现重复，则返回false。
2. 列检查：对列执行相同的操作。
3. 3x3子网格检查：遍历每一个3x3的子网格并检查是否有重复。

通过将问题分解为这些较小的检查，可以有效地验证数独网格的有效性。

祝你在即将到来的Uber在线评估中好运！通过练习这些类型的问题，你肯定会表现得更好。

经过我们的强力面试辅助，OA代写，候选人通过这些面试题的解析和沟通，面试官不仅了解了候选人的编程能力，也看到了我在解决问题过程中清晰的思路和有效的沟通技巧。这些不仅有助于应对 Meta 的面试，同时也能提升我们解决实际编程问题的能力。祝大家面试顺利！

如果你也需要我们的面试辅助服务，请立即联系我们。