Tiktok的这道题目是一个关于实现一个预约系统的编程问题，具体来说，是为一家汽车经销商设计一个预约调度器。系统需要满足几个关键约束：每个预约由一个开始时间和持续时间的整数对表示；顾客被随机分配给两名员工中的一位，不能自选；每位员工同时只能处理一位顾客的预约。设计的调度器类 DealershipScheduler 需要实现一个方法 bool book(int startTime, int duration)，这个方法在可以安排预约时返回 true，如果预约会导致任一员工双重预约则返回 false。

This interview question is about designing an appointment scheduling system for a car dealership. Specifically, it involves creating a DealershipScheduler class that handles the scheduling constraints: each appointment is represented by a pair of integers indicating the start time and duration; customers are randomly assigned to one of the two employees and cannot choose their preferred employee; each employee can only handle one customer at a time. The key method to be implemented is bool book(int startTime, int duration), which returns true if the appointment can be scheduled without causing a double booking for any employee, and false otherwise.

Problem Description

You are running a car dealership and currently have 2 employees. We are going to be building a basic function to deal with customers booking appointments with your employees.

You have the following constraints:

1. An appointment is represented by a pair of integers [start time, duration]
2. Customers get assigned to either of your employees and they don’t get to

choose who they get.

3. Your 2 employees can only handle one customer at a time.
   Implement a DealershipScheduler class that has the following method:
   bool book(int startTime, int duration)

returning true if you can book an appointment for these times and false if it would result in your employees being double booked.

Sample bookings:

[10, 10], [50, 10], [10, 30], [5, 10], [5, 5], [25, 30]

Problem Description

Implement a DealershipScheduler class with the following method:

• bool book(int startTime, int duration): returns true if the appointment can be booked at the specified start time and duration without causing any employee to be double booked. Otherwise, it returns false.

Example booking requests include:

• [10, 10]
• [50, 10]
• [10, 30]
• [5, 10]
• [5, 5]
• [25, 30]

题目评价

这个面试题目从不同角度来看，具有一定的优点也有潜在的挑战。

优点

1. 实践性：题目设计紧贴实际场景，考察候选人是否能够理解和处理现实生活中的问题。这有助于评估候选人将理论知识应用于实际问题的能力。
2. 算法和数据结构：要求候选人使用有效的数据结构来存储预约信息，并运用算法来判断预约是否冲突，检验了候选人在算法和数据结构方面的知识和能力。
3. 代码组织能力：通过设计类和方法，考察候选人的代码组织和封装能力，这对于编写可维护和可扩展代码非常重要。

挑战

1. 复杂度管理：随着预约数量的增加，如何有效管理和查询预约成为挑战。需要候选人有较好的算法优化能力，以及在时间复杂度和空间复杂度之间做出合理的权衡。
2. 边界条件处理：题目涉及时间的管理，包括预约的开始时间和持续时间，候选人需要仔细考虑和处理边界条件，这测试了候选人对细节的关注程度。
3. 公平性考量：由于顾客不能选择服务员工，如何设计算法以确保员工的工作负载相对均衡，也是一个考虑因素，这涉及到算法设计的公平性和效率。

结论

总的来说，这个题目是对候选人编程能力的全面测试，从理解问题、设计解决方案到编写高效、可维护代码都有所涉及。它对候选人是一个挑战，但同时也是展示其技能的机会。对于招聘方来说，通过这个题目可以较好地评估候选人的编程能力、问题解决能力以及代码的组织能力。然而，也需要注意，这种类型的题目可能需要较多的时间来完成，并且对于不熟悉特定算法或数据结构的候选人可能相对不利。因此，面试官应该结合其他类型的问题，以全面评估候选人的能力。

Assessment of the Question

From different perspectives, this interview question has its merits as well as potential challenges.

Merits

1. Practicality: The problem is closely related to real-life scenarios, testing the candidate's ability to understand and address practical issues. This helps assess how well a candidate can apply theoretical knowledge to solve real-world problems.
2. Algorithm and Data Structures: It requires candidates to use efficient data structures to store appointment information and apply algorithms to check for booking conflicts, evaluating their knowledge and skills in algorithms and data structures.
3. Code Organization Skills: By designing a class and methods, it examines candidates' abilities to organize and encapsulate code, crucial for writing maintainable and scalable code.

Challenges

1. Complexity Management: As the number of appointments increases, efficiently managing and querying appointments becomes challenging. It demands good optimization skills from candidates, as well as making reasonable trade-offs between time complexity and space complexity.
2. Boundary Condition Handling: The problem involves managing time, including start times and durations of appointments, requiring candidates to carefully consider and handle boundary conditions, testing their attention to detail.
3. Fairness Consideration: Since customers cannot choose their employee, designing an algorithm to ensure a relatively balanced workload among employees is also a factor. This involves considerations of fairness and efficiency in algorithm design.

Conclusion

Overall, this question is a comprehensive test of a candidate's programming abilities, ranging from understanding the problem, designing a solution, to writing efficient, maintainable code. It poses a challenge to candidates but also offers them an opportunity to showcase their skills. For recruiters, this question can effectively assess candidates' programming capabilities, problem-solving abilities, and code organization skills. However, it is also important to note that such problems might require more time to complete and could be disadvantageous for candidates unfamiliar with specific algorithms or data structures. Therefore, interviewers should balance this with other types of questions to fully assess a candidate's abilities.

The above is an overview of some Tiktok interview questions. These questions demonstrate the algorithmic and programming challenges that may be encountered during the interview. For job seekers preparing for interviews, understanding these real questions and practicing problem-solving skills is very helpful.

If you want to prepare more in-depth for interviews with Tiktok or other technology companies, we provide professional interview coaching services. Our tutoring services include one-on-one programming exercises, interview skill explanations, practice exercises, interview assistance, and proxy interviews. These will help improve your interview skills and increase the chances of obtaining your ideal job.

以上是部分Tiktok面试真题的概览。这些问题展现了面试中可能遇到的算法和编程挑战。对于准备面试的求职者来说，了解这些真题并练习解题技巧是非常有帮助的。

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