PostgreSQL在线测试

About the test:

PostgreSQL Online测试使用基于方案的MCQ来评估候选者对PostgreSQL的了解，包括他们在SQL查询，数据库设计，索引，交易和存储过程中的熟练程度。该测试旨在评估候选人有效地使用PostgreSQL数据库并开发有效利用PostgreSQL的应用程序的能力。

Covered skills:

SQL基础知识
数据库设计
数据建模
交易
性能调整

数据库管理
数据操纵
索引
查询优化

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9 reasons why

Adaface PostgreSQL在线测试 is the most accurate way to shortlist PostgreSQL数据库管理员s

Reason #1

Tests for on-the-job skills

The PostgreSQL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:

能够编写复杂的SQL查询
精通数据库管理和优化
擅长数据操纵和建模
在查询优化和性能调整方面知识渊博
能够设计有效的数据库
处理交易经验
熟悉基本的SQL语法和操作
有能力实施索引以提高数据库性能

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 PostgreSQL在线测试将是不可行的.

🧐 Question
Easy DROP SUM bar	Try practice test
What will the following PostgresSQL snippet below output?
Medium SCHEMA car far	Try practice test
What will the following PostgreSQL snippet output?
Medium Multi Select JOIN GROUP BY	Try practice test
Consider the following SQL table: How many rows does the following SQL query return?
Medium nth highest sales Nested queries User Defined Functions	Try practice test
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
Medium Select & IN Nested queries	Try practice test
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
Medium Sorting Ubers Nested queries Join Comparison operators	Try practice test
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
Hard With, AVG & SUM MAX() MIN() Aggregate functions	Try practice test
Consider the following SQL table: How many tuples does the following query return?

	🧐 Question	🔧 Skill
	Easy DROP SUM bar	2 mins PostgreSQL	Try practice test
What will the following PostgresSQL snippet below output?
	Medium SCHEMA car far	2 mins PostgreSQL	Try practice test
What will the following PostgreSQL snippet output?
	Medium Multi Select JOIN GROUP BY	2 mins SQL	Try practice test
Consider the following SQL table: How many rows does the following SQL query return?
	Medium nth highest sales Nested queries User Defined Functions	3 mins SQL	Try practice test
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
	Medium Select & IN Nested queries	3 mins SQL	Try practice test
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
	Medium Sorting Ubers Nested queries Join Comparison operators	3 mins SQL	Try practice test
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
	Hard With, AVG & SUM MAX() MIN() Aggregate functions	2 mins SQL	Try practice test
Consider the following SQL table: How many tuples does the following query return?

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	DROP SUM bar	PostgreSQL	Easy	2 mins	Try practice test
What will the following PostgresSQL snippet below output?
	SCHEMA car far	PostgreSQL	Medium	2 mins	Try practice test
What will the following PostgreSQL snippet output?
	Multi Select JOIN GROUP BY	SQL	Medium	2 mins	Try practice test
Consider the following SQL table: How many rows does the following SQL query return?
	nth highest sales Nested queries User Defined Functions	SQL	Medium	3 mins	Try practice test
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
	Select & IN Nested queries	SQL	Medium	3 mins	Try practice test
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
	Sorting Ubers Nested queries Join Comparison operators	SQL	Medium	3 mins	Try practice test
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
	With, AVG & SUM MAX() MIN() Aggregate functions	SQL	Hard	2 mins	Try practice test
Consider the following SQL table: How many tuples does the following query return?

Reason #4

1200+ customers in 75 countries

借助 Adaface，我们能够将初步筛选流程优化达 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 PostgreSQL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 PostgreSQL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

查看样本记分卡

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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 PostgreSQL在线测试

Why you should use PostgreSQL在线测试?

The PostgreSQL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:

能够编写复杂的SQL查询并执行高级数据操作的能力
使用PostgreSQL设计和管理数据库的经验
了解数据建模概念和创建高效数据库模式的能力
了解数据库索引技术及其对查询性能的影响
优化查询以提高性能和查询执行时间的技能
熟悉交易管理和确保数据完整性的能力
在PostgreSQL数据库的查询优化和性能调整方面的经验
能够解决数据库性能问题并优化数据库配置的能力
SQL基础知识以及编写和执行基本SQL语句的能力
了解数据库管理原则和实践

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 PostgreSQL在线测试?

数据库管理
数据库管理涉及管理和维护数据库系统，包括用户管理，安全性，性能监控以及备份和恢复等任务。衡量此技能有助于评估候选人有效管理和组织大量数据的能力，同时确保数据完整性和安全性。
数据库设计
数据库设计是指创建结构化的过程满足应用程序要求的高效数据库模式。该技能很重要，因为设计良好的数据库架构可确保最佳数据检索并降低数据操作任务的复杂性。
数据操作
数据操作涉及对数据库中的数据进行操作，例如插入，更新和删除记录。衡量此技能有助于评估候选人有效执行数据操作任务的能力并确保他们对数据修改操作有良好的了解。
数据建模
数据建模是创建一个过程数据在数据库中如何构建数据的概念表示。该技能是必不可少的，因为它有助于设计和理解不同实体和属性之间的关系，从而实现有效的数据检索和分析。
索引
索引是提高性能的数据结构通过允许更快的数据访问来查询数据库查询。衡量此技能有助于评估候选人通过基于查询模式和数据分配来选择和创建适当索引来优化查询性能的能力。
交易
交易确保通过通过确保通过通过确保数据完整性和一致性。提供一种将多个数据库操作分组为单个逻辑单元分组的机制。衡量此技能有助于评估候选人对交易管理的理解及其在多用户环境中确保数据完整性的能力。
查询优化
查询优化涉及选择最有效的过程给定查询的执行计划，将查询执行所需的时间和资源最小化。衡量此技能有助于评估候选人通过了解数据库查询执行，索引使用和查询重写技术来优化查询性能的能力。
绩效调整
性能调整涉及识别和解决绩效问题在数据库系统中，以改善查询响应时间，吞吐量和整体系统效率。衡量此技能有助于评估候选人分析数据库性能指标，识别瓶颈并应用优化技术来增强系统性能的能力。
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 PostgreSQL在线测试 to be based on.
SQL基础知识
数据库管理
数据库设计
数据操纵
数据建模
索引
交易
查询优化
性能调整
表创建
数据类型
约束
SQL操作员
聚合功能
加入
子征服
视图
存储程序
触发器
正常化
数据的完整性
实体关系图
数据库正常形式
查询执行计划
索引策略
锁定
酸性
数据库索引
优化查询
查询调整
查询重写
数据库碎片
复制
数据库备份和恢复
数据库架构设计
表分区
并发控制
僵局检测
数据复制
数据压缩
查询分析
数据库监视
数据库缓存
数据库安全性
备份和还原策略
数据库部署
数据库迁移
数据备份
数据恢复
数据库交易
数据库锁定
数据库并发
数据库隔离水平
数据库性能监视
数据库连接池
查询执行时间优化
数据库连接管理
数据库复制
SQL注入
数据库群集

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

PostgreSQL数据库管理员
PostgreSQL数据库开发人员
后端开发人员
PostgreSQL数据分析师

How is the PostgreSQL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