Scala在线测试

Q: What topics are covered in the Scala在线测试?

Scala编程语言 功能编程 面向对象的编程 收藏 模式匹配 并发和并行性 错误处理 类型推理 特质和混合物 高阶功能 不变的数据结构 Scala测试框架

About the test:

Scala Online测试使用基于方案的MCQ来评估候选人在使用Scala编程语言方面的知识和熟练程度上，包括核心概念，语法和功能编程原则。该测试评估了候选人使用Scala设计和开发高效且可扩展应用程序的能力。该测试包括一个编码问题，以评估动手的Scala编程技能。

Covered skills:

Scala编程语言
面向对象的编程
模式匹配
错误处理
特质和混合物
不变的数据结构

功能编程
收藏
并发和并行性
类型推理
高阶功能
Scala测试框架

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9 reasons why

Adaface Scala在线测试 is the most accurate way to shortlist Scala开发人员s

Reason #1

Tests for on-the-job skills

The Scala在线测试 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:

精通Scala编程语言
对功能编程的强烈了解
面向对象的编程方面的专业知识
Scala中收藏的知识
有效使用模式匹配的能力
Scala中的并发和并行性的经验
熟练处理错误
熟悉Scala中的类型推理
能够在Scala中利用特征和混合物
精通高阶功能
了解Scala中不变的数据结构
熟悉Scala测试框架

Reason #2

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

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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 Scala在线测试将是不可行的.

🧐 Question
Medium placeholder method	Solve
Review the following Scala code. “placeholder” is a placeholder function to be replaced with an actual Scala in-built method. What should ‘placeholder’ be so that the a, b, c in the code evaluate to true?
Medium Compilation Errors	Solve
Which lines in the following Scala code will lead to compilation errors?
Easy take and reduceLeft List String	Solve
What will the following Scala code print?
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 placeholder method	2 mins Scala	Solve
Review the following Scala code. “placeholder” is a placeholder function to be replaced with an actual Scala in-built method. What should ‘placeholder’ be so that the a, b, c in the code evaluate to true?
	Medium Compilation Errors	2 mins Scala	Solve
Which lines in the following Scala code will lead to compilation errors?
	Easy take and reduceLeft List String	2 mins Scala	Solve
What will the following Scala code print?
	Easy Registration Queue Logic Queues	30 mins Coding	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	30 mins Coding	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	💪 Difficulty	⌛ Time
	placeholder method	Scala	Medium	2 mins	Solve
Review the following Scala code. “placeholder” is a placeholder function to be replaced with an actual Scala in-built method. What should ‘placeholder’ be so that the a, b, c in the code evaluate to true?
	Compilation Errors	Scala	Medium	2 mins	Solve
Which lines in the following Scala code will lead to compilation errors?
	take and reduceLeft List String	Scala	Easy	2 mins	Solve
What will the following Scala code print?
	Registration Queue Logic Queues	Coding	Easy	30 mins	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
	Visitors Count Strings Logic	Coding	Medium	30 mins	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.

Reason #4

1200+ customers in 75 countries

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

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Scala在线测试 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 Scala在线测试 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.

Reason #7

Detailed scorecards & benchmarks

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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.

Reason #9

Advanced Proctoring

Learn more

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About the Scala在线测试

Why you should use Scala在线测试?

The Scala在线测试 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:

能够编写干净有效的Scala代码的能力
能够熟练功能编程概念，例如不变性，高阶功能和模式匹配
对面向对象的编程原则的强烈了解及其在Scala中的应用
使用Scala收藏及其相关方法的专业知识
有错误处理和写入强大的代码的经验
Scala中的并发和并行性知识
熟悉类型推理和类型在Scala中的检查
了解Scala中特征和混合物的理解
能够使用适当框架使用和测试Scala代码的能力
了解不变的数据结构及其在Scala中的优势

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 Scala在线测试?

功能编程
功能编程是一种编程范式，专注于不变性，纯函数和高阶功能。它允许开发人员通过避免共享状态和副作用来编写简洁，模块化和可维护的代码。评估候选人在功能编程方面的熟练程度对于确保他们可以利用Scala的功能功能来编写高效且健壮的代码。
面向对象的编程
面向对象的编程是一种编程范式集中于包含数据和行为的对象。它促进了封装，继承和多态性，以实现模块化和可重复使用的代码。评估候选人对Scala中面向对象的原则的理解至关重要，因为它使他们能够设计和实施可扩展和可扩展的解决方案。
collections
集合是Scala提供的基本数据结构用于操纵和处理元素序列的广泛操作。熟练使用收集对于编写高效和表达代码至关重要。评估候选人对Scala集合的知识确保他们可以在程序中有效利用这些强大的结构。
模式匹配
模式匹配是Scala中的一个强大功能，可以使开发人员匹配复杂的数据基于预定义模式的结构和提取值。它简化了代码，并为各种问题提供了优雅的解决方案。评估候选人使用模式匹配的能力有效地确保他们可以编写简洁而可读的代码。
并发和并行性
并发和并行性和并行性是现代软件开发中的重要概念，以利用能力利用的力量。多核处理器并提高应用程序的性能。评估候选人对Scala中的并发和并行性的理解确保他们可以设计和实施并发和高效的解决方案，从而有效利用系统资源。
错误处理
错误处理是关键的方面编写坚固且可维护的软件。 Scala提供了处理异常和错误的各种机制，例如尝试/捕获块以及选项以及任何一种类型。评估候选人在Scala中的错误处理知识确保他们可以有效地处理和传达代码中的错误。
type type type penperion
键入type type type type type type type type conperive是Scala中的功能，可以自动编译器自动推断表达式和变量的类型。它降低了代码的冗长性，并促进了更多简洁，可读的程序。测量候选人对类型推理的理解可确保他们可以利用此功能来编写干净和表达的代码。
特质和混合素
特征和混合物是Scala中有力的机制，可允许代码再利用和组成。特征可以创建可重复使用的行为单位，而Mixins则提供了一种将多个特征组合为单个类的方法。评估候选人对性状和混合物的知识确保他们可以在Scala中设计和实现模块化和可重复使用的组件。
高阶功能
高阶功能是采用一个或多个功能用作参数或返回函数作为结果。它们促进代码模块化，并启用更具表现力和可重复使用的代码的创建。评估候选人在高阶功能方面的熟练程度可确保他们可以在其Scala程序中有效利用这种强大的功能编程概念。
不可变的数据结构
不可能的数据结构是状态无法的数据结构创建后进行修改。他们通过消除复杂的突变和共享状态问题来简化代码。评估候选人对Scala中不变数据结构的理解确保他们可以编写更容易推理，测试和维护的代码。
Scala测试框架
Scala测试框架是库，是库，提供一组工具和实用程序来为Scala应用程序编写和执行测试。它们使开发人员能够创建全面的测试套件并自动化其代码的验证。评估候选人对Scala测试框架的熟悉确保他们可以编写可靠且可靠的测试以确保其Scala代码的正确性。
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 Scala在线测试 to be based on.
基本语法
功能
数据类型
变量
课程
对象
遗产
多态性
封装
高阶功能
模式匹配
收藏
不变的数据结构
错误处理
并发
并行性
仿制药
类型推理
特质
混合物
高阶类型
部分功能
经过理解
隐含
价值类
案例类
懒惰评估
基本的IO操作
处理XML和JSON
并发工具（期货，承诺等）
使用Scala测试框架进行测试
与Akka分布式编程
功能库（例如猫，Scalaz）
类型类
平行收集
功能错误处理
流处理
与Scala平行编程
使用Scala处理大数据处理
Scala中的反应性编程
使用Scala访问数据库
Scala和Java Interop
并发模式
类型级编程
关闭
不变的收藏
了解Scala编译器
读写文件
常用表达
类型安全配置管理
与期货合作
异步编程
软件设计原理
功能测试
调试技术

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What roles can I use the Scala在线测试 for?

Scala开发人员
大数据开发人员
高级Scala软件工程师
高级大数据工程师-Scala

How is the Scala在线测试 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