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SQL Server Online Test

The SQL Server Online test uses scenario-based MCQs to evaluate candidates on their knowledge of SQL Server, including their proficiency in writing complex SQL queries, administering SQL Server instances, and managing data. Additionally, the test assesses a candidate's understanding of SQL Server security, performance optimization, and disaster recovery. The test aims to evaluate a candidate's ability to work with SQL Server effectively and efficiently in various real-world scenarios.

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Screen candidates with a 40 mins test

Test duration:  40 mins
Difficulty level:  Moderate
Availability:  Ready to use
Questions:
  • 8 SQL Server MCQs
  • 7 SQL MCQs
Covered skills:
Transactional and relational Database
Configurations
Database & Database Objects
Installation
Synchronization
Transaction Logs
Database Monitoring & Maintenance
Backup & Recovery
SQL Server Database Security & Troubleshooting
Storage Area Network (SAN)
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Use the SQL Server Test to shortlist qualified candidates

The SQL Server 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:

  • Ability to design and implement transactional and relational databases
  • Ability to configure SQL server settings and optimizations
  • Ability to create and manage database objects
  • Ability to install SQL server and perform necessary configurations
  • Ability to synchronize data between multiple databases
  • Ability to manage transaction logs effectively
  • Ability to monitor and maintain databases
  • Ability to backup and recover databases
  • Ability to troubleshoot SQL server database security issues
  • Ability to work with Storage Area Network (SAN)
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Screen candidates with the highest quality 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

These are just a small sample from our library of 15,000+ questions. The actual questions on this SQL Server Test will be non-googleable.

🧐 Question

Medium

Backup Strategy
Backups
Troubleshooting
Solve
As a DBA, you receive an alert notifying you that the production database has gone offline due to a severe issue. Fortunately, you have a proper backup strategy in place. The backups are performed as follows:

1. Full database backup every Sunday at 2:00 AM.
2. Differential backup every day at 2:00 AM, except Sunday.
3. Transaction log backup every hour.
Today is Wednesday, and the failure occurred at 10:15 AM. You have the following backup files available:

1. Full backup: Full_Backup_Sun.bak taken on Sunday 2:00 AM.
2. Differential backups: Diff_Backup_Mon.bak, Diff_Backup_Tue.bak, Diff_Backup_Wed.bak taken at 2:00 AM on their respective days.
3. Transaction log backups: Hourly backups from Sunday 3:00 AM until Wednesday 10:00 AM, like TLog_Backup_Wed_09.bak, TLog_Backup_Wed_10.bak.
Given the RPO (Recovery Point Objective) of 15 minutes, which of the following sequences of restore operations would ensure minimal data loss?
A: Full_Backup_Sun.bak, Diff_Backup_Wed.bak, then all Transaction Log backups from Wednesday.

B: Full_Backup_Sun.bak, Diff_Backup_Tue.bak, then all Transaction Log backups from Tuesday and Wednesday.

C: Full_Backup_Sun.bak, Diff_Backup_Wed.bak, then Transaction Log backups from Wednesday 2:00 AM to 10:00 AM.

D: Full_Backup_Sun.bak, then all Transaction Log backups from Sunday to Wednesday 10:00 AM.

E: Full_Backup_Sun.bak, Diff_Backup_Mon.bak, Diff_Backup_Tue.bak, Diff_Backup_Wed.bak, then Transaction Log backups from Wednesday 2:00 AM to 10:00 AM.

Medium

Optimizing Query Performance
Indexing
Join Optimization
Execution Plans
Solve
You are managing a SQL Server database for a large e-commerce platform. The database contains the following tables:
 image
Users often run a query to retrieve all orders from a specific date along with customer details and a breakdown of each order. Lately, this query has been performing poorly, especially on days with a high volume of orders.

Given this schema, which of the following changes would MOST LIKELY enhance the performance of this query?
A: Create a non-clustered index on Orders(OrderDate, OrderID) and a clustered index on OrderDetails(OrderID).
B: Create a clustered index on Orders(CustomerID, OrderDate) and a non-clustered index on OrderDetails(ProductName).
C: Increase the size of the OrderDetails(ProductName) column and add more RAM to the SQL Server machine.
D: Create a clustered index on Orders(OrderDate) and a non-clustered index on OrderDetails(OrderID, Quantity).
E: Partition the Orders table on OrderDate and create a non-clustered index on OrderDetails(DetailID, Price).

Medium

Transaction Isolation
Transaction Isolation Levels
Snapshot Isolation
Solve
You are managing a SQL Server instance that is experiencing performance degradation. After some analysis, you realize that the TempDB is under heavy stress due to numerous long-running transactions. Users have reported that some SELECT queries on a large table, named SalesData, are slower than expected.

You consider implementing Snapshot Isolation to mitigate blocking issues. You're aware that Snapshot Isolation uses TempDB to store row versions.

Given the situation, which combination of actions will help alleviate the stress on TempDB and enhance the performance of SELECT queries on SalesData?
A: Move TempDB to a faster storage subsystem and enable Snapshot Isolation for SalesData.
B: Increase the number of TempDB data files, shrink TempDB size, and enable Snapshot Isolation for the database.
C: Implement Read Committed Snapshot Isolation (RCSI) for the database and partition the SalesData table.
D: Reduce the TempDB size, implement table partitioning on SalesData, and enable Read Uncommitted isolation level for the SELECT queries.
E: Create a non-clustered index on frequently queried columns of SalesData and enable row versioning for the entire database.

Medium

Transaction Log Management
Performance Tuning
Log Management
Solve
You are a DBA at a large company managing an SQL Server database which is crucial for daily operations. The database is configured with the Full recovery model. The database is experiencing considerable transaction log growth during business hours, which is impacting the disk space and performance.

The following operations are performed on this database:

1. A large ETL process that runs every night, which transforms and loads data into several tables.
2. A data archiving job that runs every night, which removes old data from several tables.
3. Frequent read/write operations during the day as part of normal business operations.

Given this scenario, which of the following strategies could help manage the transaction log growth effectively?
A: Switch to the Simple recovery model.
B: Schedule frequent log backup and cleanups during business hours.
C: Shrink the transaction log file size during business hours.
D: Increase the database file size.

Medium

Multi Select
JOIN
GROUP BY
Solve
Consider the following SQL table:
 image
How many rows does the following SQL query return?
 image

Medium

nth highest sales
Nested queries
User Defined Functions
Solve
Consider the following SQL table:
 image
Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
 image

Medium

Select & IN
Nested queries
Solve
Consider the following SQL table:
 image
Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
 image

Medium

Sorting Ubers
Nested queries
Join
Comparison operators
Solve
Consider the following SQL table:
 image
What will be the first two tuples resulting from the following SQL command?
 image

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions
Solve
Consider the following SQL table:
 image
How many tuples does the following query return?
 image
🧐 Question🔧 Skill

Medium

Backup Strategy
Backups
Troubleshooting

3 mins

SQL Server
Solve

Medium

Optimizing Query Performance
Indexing
Join Optimization
Execution Plans

3 mins

SQL Server
Solve

Medium

Transaction Isolation
Transaction Isolation Levels
Snapshot Isolation

3 mins

SQL Server
Solve

Medium

Transaction Log Management
Performance Tuning
Log Management

3 mins

SQL Server
Solve

Medium

Multi Select
JOIN
GROUP BY

2 mins

SQL
Solve

Medium

nth highest sales
Nested queries
User Defined Functions

3 mins

SQL
Solve

Medium

Select & IN
Nested queries

3 mins

SQL
Solve

Medium

Sorting Ubers
Nested queries
Join
Comparison operators

3 mins

SQL
Solve

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions

2 mins

SQL
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Backup Strategy
Backups
Troubleshooting
SQL Server
Medium3 mins
Solve
Optimizing Query Performance
Indexing
Join Optimization
Execution Plans
SQL Server
Medium3 mins
Solve
Transaction Isolation
Transaction Isolation Levels
Snapshot Isolation
SQL Server
Medium3 mins
Solve
Transaction Log Management
Performance Tuning
Log Management
SQL Server
Medium3 mins
Solve
Multi Select
JOIN
GROUP BY
SQL
Medium2 mins
Solve
nth highest sales
Nested queries
User Defined Functions
SQL
Medium3 mins
Solve
Select & IN
Nested queries
SQL
Medium3 mins
Solve
Sorting Ubers
Nested queries
Join
Comparison operators
SQL
Medium3 mins
Solve
With, AVG & SUM
MAX() MIN()
Aggregate functions
SQL
Hard2 mins
Solve

Test candidates on core SQL Server Hiring Test topics

Transactional and Relational Database: This skill involves understanding and working with databases that support transactions and relationships between data. It is essential to measure this skill in the test as it ensures the candidate's ability to design and manage databases efficiently.

Configurations: This skill encompasses the knowledge of configuring SQL Server settings, such as memory allocation, network protocols, and server options. Measuring this skill is important as it evaluates the candidate's capability to optimize the performance and security of a SQL Server installation.

Database & Database Objects: This skill evaluates the candidate's proficiency in creating, modifying, and managing databases and database objects like tables, views, and stored procedures. Assessing this skill is crucial as it reflects the candidate's ability to organize and manipulate data effectively in a SQL Server environment.

Installation: This skill involves the process of installing SQL Server, including the selection of appropriate installation options and configuring the necessary components. It is important to measure this skill as it assesses the candidate's understanding of the installation process to ensure a successful and reliable deployment of SQL Server.

Synchronization: This skill encompasses the ability to synchronize data across multiple servers or databases using techniques such as replication or mirroring. Measuring this skill is crucial as it demonstrates the candidate's capability to maintain consistent and up-to-date data in a distributed database environment.

Transaction Logs: This skill pertains to managing and analyzing transaction logs in a SQL Server database. Assessing this skill is important as it ensures the candidate's proficiency in troubleshooting and recovering from system failures, as well as maintaining data integrity through proper log management.

Database Monitoring & Maintenance: This skill involves monitoring the performance, availability, and health of SQL Server databases using various tools and techniques. It is essential to measure this skill as it reflects the candidate's ability to proactively identify and resolve performance issues, ensuring optimal database performance and availability.

Backup & Recovery: This skill encompasses creating and executing backup and recovery strategies to safeguard SQL Server databases against data loss and to restore them in the event of failures. Assessing this skill is important as it evaluates the candidate's knowledge and proficiency in protecting critical data and minimizing downtime.

SQL Server Database Security & Troubleshooting: This skill involves implementing and maintaining robust security measures to protect SQL Server databases from unauthorized access and ensuring data confidentiality. Measuring this skill is crucial as it assesses the candidate's capability to identify and resolve security vulnerabilities and troubleshoot issues effectively.

Storage Area Network (SAN): This skill pertains to working with SQL Server databases that utilize a Storage Area Network (SAN) for storage provisioning. Assessing this skill is important as it reflects the candidate's understanding of SAN technologies, ensuring efficient and reliable storage management for SQL Server environments.

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Have questions about the SQL Server Hiring Test?

How does pricing work?

You can check out our pricing plans.

Can I customize the test?

Yes, absolutely. Custom assessments are set up within 48 hours based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test. You can also customize a test by uploading your own questions.

Can I combine multiple skills into one test?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

What roles can I use the SQL Server Test for?

Here are few roles for which we recommend this test:

  • Database Administrator
  • SQL Developer
  • PostgreSQL Developer
  • Data Analyst
  • Software Engineer
  • Business Intelligence Analyst
  • Data Engineer
  • Data Architect
  • Data Warehouse Developer
  • ETL Developer
Can I see a sample test, or do you have a free trial?

Yes!

The free trial includes one sample technical test (Java/ JavaScript) and one sample aptitude test that you will find in your dashboard when you sign up. You can use it to review the quality of questions and the candidate experience of giving a test on Adaface.

You can preview any of the 500+ tests and see the sample questions to decide if it would be a good fit for your requirements.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

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