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About the test:

后端工程师在线测试使用基于方案的MCQ来评估候选人的后端开发知识,其中涉及设计和实施服务器端逻辑,数据库和API来支持Web和移动应用程序。该测试评估了候选人在设计可扩展和健壮体系结构的熟练程度,以Java,Python或Ruby等语言编写有效的代码,并与数据库进行构建并集成,并实现RESTFULE API,并调试和优化服务器端代码。

Covered skills:

  • 后端发展
  • API设计
  • 面向对象的编程
  • 性能优化
  • 数据库设计
  • 软件体系结构
  • 系统设计

9 reasons why
9 reasons why

Adaface Backend Engineer Test is the most accurate way to shortlist 后端工程师s



Reason #1

Tests for on-the-job skills

The Backend Engineer Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • 熟练使用各种编程语言来熟练的后端开发
  • 对数据库设计和管理的强烈了解
  • 能够设计和开发遵守行业最佳实践的API
  • 知识渊博的软件体系结构原理和模式
  • 熟练于面向对象的编程概念和实施
  • 在系统设计和构建可扩展应用程序方面经验丰富
  • 能够进行性能优化技术和策略
  • 精通故障排除和调试复杂的后端问题
  • 与第三方API合作和整合的能力
  • 了解安全最佳实践的后端开发实践
  • 熟悉缓存机制和策略
  • 在后端上下文中了解数据结构和算法
Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface
Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

这些只是我们库中有10,000多个问题的一个小样本。关于此的实际问题 后端工程师测试 将是不可行的.

🧐 Question

Medium

Broker Replication
System Design
Solve
You are working on a large-scale, distributed, and fault-tolerant message processing system designed to handle high throughput and low latency requirements. The system is based on the publish-subscribe pattern and uses multiple brokers to distribute messages across various topics and partitions. In this architecture, both publishers and subscribers are considered clients. The brokers are responsible for replicating messages among themselves to ensure fault tolerance and data durability.
 image
A client reports successfully publishing a message on a specific topic. However, one of the subscribers has not received the message. To investigate the issue, you have gathered detailed logs and system design data, as shown below:
 image
Based on the information provided, which of the following is the most likely reason for the issue?

A: The message was not published on the topic
B: Client C is not subscribed to the correct topic
C: There is a replication lag between brokers B1 and B2
D: Client C is consuming from the wrong broker
E: The message processing system failed to acknowledge the message

Medium

Load Balancer Latency
Debugging
Solve
A backend service is experiencing intermittent latency spikes while processing incoming requests. The service is deployed in a multi-node environment with a load balancer in front. You suspect that the issue might be related to resource contention. You collect the following performance metrics from the affected nodes during a spike:
 image
Which of the following is the most probable cause of the latency spikes?
A: High memory usage on the affected nodes.
B: Disk I/O bottlenecks on the affected nodes.
C: Insufficient CPU resources on the affected nodes.
D: Uneven distribution of incoming requests by the load balancer.
E: Network latency between the load balancer and the backend nodes.

Medium

Decryptor
Strings
Solve
What does the following pseudo code print?
 image

Hard

Fibonacci codes
Time Complexity
Pseudo Code
Solve
Here are three pseudocodes for calculating the Nth Fibonacci number. Which of the following statements about these codes are true?
 image
A: Time complexity/efficiency of CODE 1, CODE 2, CODE 3 is the same.
B: CODE 2 is more space-efficient than CODE 3.
C: CODE 3 is more space-efficient than CODE 2.
D: CODE 2 is more time-efficient than CODE 1.
E: CODE 3 is more time-efficient than CODE 1.

Hard

Palindrome Test cases
Strings
Solve
Go through the following faulty palindrome detection pseudocode and test cases. For which of the test cases would the code return true?
 image
Testcases
A: a
B: aba
C: aaa
D: aac

Medium

Rewards Activities Order
Database Connection
Solve
A new popular app tracks the activities performed by its users and grants them rewards based on each individual's total activities performed in a year. This data is maintained in a database table (activitesinfo), with the following columns: userid, totalactivities, reward. This year, due to fundraising activity, the company has decided to further reward its users by enhancing the reward as per the following formula: If reward < = 4000, increase it by 2%, If 4000 < reward <= 8000, increase it by 4%, If reward > 8000, increase it by 6%.
The tech team has written three different scripts to calculate increment for each slab, each script is to run as a separate transaction. Here are the three scripts:
Script 1:
For users with reward <= 4000, set reward = reward * 1.02

Script 2:
For users with reward > 4000 and reward <= 8000, set reward = reward * 1.04

Script 3:
For users with reward > 8000, set reward = reward * 1.06
Each script is to be executed separately. Which of the following options will update the rewards as expected:
A: Execute Script 1 followed by Script 2 followed by Script 3
B: Execute Script 2 followed by Script 3; Script 1 running concurrently throughout
C: Execute Script 3 followed by Script 2; Script 1 running concurrently throughout
D: Execute Script 3 followed by Script 2 followed by Script 1
E: Execute Script 2 followed by Script 3 followed by Script 1

Easy

Registration Queue
Logic
Queues
Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.
For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.
⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

Medium

Visitors Count
Strings
Logic
Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 
Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 
⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.
🧐 Question🔧 Skill

Medium

Broker Replication
System Design

3 mins

Backend
Solve

Medium

Load Balancer Latency
Debugging

3 mins

Backend
Solve

Medium

Decryptor
Strings

2 mins

Technical Aptitude
Solve

Hard

Fibonacci codes
Time Complexity
Pseudo Code

2 mins

Technical Aptitude
Solve

Hard

Palindrome Test cases
Strings

2 mins

Technical Aptitude
Solve

Medium

Rewards Activities Order
Database Connection

3 mins

Technical Aptitude
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Broker Replication
System Design
Backend
Medium3 mins
Solve
Load Balancer Latency
Debugging
Backend
Medium3 mins
Solve
Decryptor
Strings
Technical Aptitude
Medium2 mins
Solve
Fibonacci codes
Time Complexity
Pseudo Code
Technical Aptitude
Hard2 mins
Solve
Palindrome Test cases
Strings
Technical Aptitude
Hard2 mins
Solve
Rewards Activities Order
Database Connection
Technical Aptitude
Medium3 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

借助 Adaface,我们能够将初步筛选流程优化高达 75% 以上,为招聘经理和我们的人才招聘团队节省了宝贵的时间!


Brandon Lee, 人事主管, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment 后端工程师测试 in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests
Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the 后端工程师测试 from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

查看样本记分卡
Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring


Learn more

About the Backend Engineer Assessment Test

Why you should use Pre-employment Backend Engineer Online Test?

The 后端工程师测试 makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

  • 使用各种编程语言和框架的后端开发
  • 具有流行数据库系统的数据库设计和管理
  • 不同软件组件之间无缝通信的API设计和开发
  • 软件架构设计和实施可扩展和可维护系统
  • 面向对象的编程原则和最佳实践
  • 系统设计以确保高效可靠的性能
  • 性能优化技术,以提高应用速度和响应能力
  • 故障排除和调试技能以识别和解决问题
  • 使用git或其他类似工具的版本控制
  • 单位测试和测试框架知识

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the Backend Engineer Online Test?

  • 数据库设计

    数据库设计涉及将数据库的结构和组织组织设计为有效存储和检索数据。它包括诸如定义表,在它们之间建立关系以及优化查询之类的任务。衡量此技能有助于衡量候选人创建可扩展且组织良好的数据库的能力,这对于构建可靠且性能的应用程序至关重要。

  • API Design

    API设计专注于创建良好的设计了应用程序编程界面(API),可以在不同的软件组件之间进行通信。它涉及确定适当的终点,请求/响应格式和身份验证机制。衡量此技能确保候选人可以创建直观且对开发人员友好的API,从而促进集成和有效的协作。

  • 软件体系结构

    软件体系结构包括高级设计和组织软件系统。它涉及对系统的结构,组件和相互作用做出决策,以满足功能和非功能性要求。衡量此技能有助于评估候选人创建可扩展,可维护和适应能力的软件体系结构的能力,从而促进灵活且可靠的应用程序开发。

  • 面向对象的编程

    面向对象的编程(OOP)(OOP) )是一个编程范式,围绕封装数据和行为的对象组织软件设计。它涉及定义类,创建对象以及使用继承和多态性。衡量此技能可以评估候选人在利用OOP原则和技术方面的熟练程度,使他们能够编写模块化,可重复使用和可扩展的代码。

  • 系统设计

    系统设计着重于设计建筑和设计和设计建筑和大规模系统的组件。它涉及确定系统要求,指定模块和接口,并考虑可扩展性,容错性和性能。衡量此技能可确保候选人可以设计能够处理大量数据和用户的强大而有效的系统。

  • 性能优化

    性能优化涉及提高速度,效率和资源利用率软件系统。它包括诸如代码分析,识别瓶颈和实施优化之类的任务。衡量此技能有助于确定了解优化软件性能的重要性,使他们能够创建高度响应且可扩展的应用程序的候选人。

  • Full list of covered topics

    The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for 后端工程师测试 to be based on.

    后端发展
    前端开发
    数据库设计
    关系数据库
    NOSQL数据库
    API设计
    宁静的API
    GraphQl
    微服务
    软件体系结构
    MVC架构
    分层体系结构
    事件驱动的架构
    面向对象的编程
    遗产
    多态性
    封装
    抽象
    系统设计
    可伸缩性
    高可用性
    负载均衡
    数据划分
    性能优化
    缓存
    查询优化
    并发
    故障排除
    调试
    异常处理
    安全最佳实践
    验证
    授权
    加密
    第三方API集成
    Oauth
    Webhooks
    记录
    错误处理
    缓存策略
    数据结构
    数组
    链接列表
    堆栈
    队列
    哈希表
    二进制树
    算法
    排序
    搜索
    动态编程
    递归
    常用表达

What roles can I use the Backend Engineer Online Test for?

  • 后端工程师
  • 完整的堆栈开发人员
  • 软件工程师
  • API开发人员
  • 软件架构师

How is the Backend Engineer Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

  • 微服务体系结构的经验
  • 了解云计算和部署
  • 了解缓存机制和技术的知识
  • 设计模式及其在软件开发中的应用
  • 诸如Docker之类的容器化技术的经验
  • 设计和维持静止API的技能
  • 了解软件开发中安全最佳实践
  • 具有消息队列和事件驱动的体系结构的经验
  • 了解分布式系统及其挑战
  • 精通SQL和查询优化
  • 通过缓存机制优化应用程序性能和可伸缩性的能力

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

Singapore government logo

招聘经理认为,通过小组面试中提出的技术问题,他们能够判断哪些候选人得分更高,并与得分较差的候选人区分开来。他们是 非常满意 通过 Adaface 筛选入围的候选人的质量。


85%
减少筛查时间

Backend Engineer Hiring Test 常见问题解答

我可以将多个技能结合在一起,为一个自定义评估吗?

是的,一点没错。自定义评估是根据您的职位描述进行的,并将包括有关您指定的所有必备技能的问题。

您是否有任何反交换或策略功能?

我们具有以下反交易功能:

  • 不可解决的问题
  • IP策略
  • Web Protoring
  • 网络摄像头Proctoring
  • 窃检测
  • 安全浏览器

阅读有关[Proctoring功能](https://www.adaface.com/proctoring)的更多信息。

如何解释考试成绩?

要记住的主要问题是评估是消除工具,而不是选择工具。优化了技能评估,以帮助您消除在技术上没有资格担任该角色的候选人,它没有进行优化以帮助您找到该角色的最佳候选人。因此,使用评估的理想方法是确定阈值分数(通常为55%,我们为您提供基准测试),并邀请所有在下一轮面试中得分高于门槛的候选人。

我可以使用该测试的经验水平?

每个ADAFACE评估都是为您的职位描述/理想候选角色定制的(我们的主题专家将从我们的10000多个问题的图书馆中选择正确的问题)。可以为任何经验级别定制此评估。

每个候选人都会得到同样的问题吗?

是的,这使您比较候选人变得容易得多。 MCQ问题的选项和问题顺序是随机的。我们有[抗欺骗/策略](https://www.adaface.com/proctoring)功能。在我们的企业计划中,我们还可以选择使用类似难度级别的问题创建多个版本的相同评估。

我是候选人。我可以尝试练习测试吗?

不,不幸的是,我们目前不支持实践测试。但是,您可以使用我们的[示例问题](https://www.adaface.com/questions)进行练习。

使用此测试的成本是多少?

您可以查看我们的[定价计划](https://www.adaface.com/pricing/)。

我可以免费试用吗?

我刚刚搬到了一个付费计划。我如何要求自定义评估?

Ready to use the Adaface 后端工程师测试?
Ready to use the Adaface 后端工程师测试?
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40 min tests.
No trick questions.
Accurate shortlisting.
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