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About the test:

The Java, Spring & SQL Online Test uses scenario-based MCQs to evaluate candidates on their understanding and application of Java programming language, Spring framework, and SQL database. The test assesses candidates' knowledge of topics such as object-oriented programming, Spring MVC, Spring Boot, relational database management systems, SQL queries, and database design principles. Candidates are evaluated on their ability to solve real-world programming problems using Java and Spring, as well as their proficiency in writing efficient and effective SQL queries.

Covered skills:

  • Java syntax and basics
  • Working with Databases in Java
  • Basics of Spring framework
  • Securing web applications with Spring Security
  • SQL Joins and Indexes
  • Java OOPs
  • Java data structures
  • Spring bean lifecycle
  • SQL CRUD Operations
  • Java Programming

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9 reasons why
9 reasons why

Adaface Java, Spring & SQL Test is the most accurate way to shortlist Java Developers



Reason #1

Tests for on-the-job skills

The Java, Spring & SQL 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:

  • Proficient in Java syntax and basics
  • Strong understanding of Java Object-Oriented Programming (OOPs) concepts
  • Ability to work with databases in Java
  • Deep knowledge of Java data structures
  • Familiarity with the basics of the Spring framework
  • Understanding of Spring bean lifecycle
  • Expertise in securing web applications with Spring Security
  • Ability to perform CRUD operations in SQL
  • Proficiency in SQL Joins and Indexes
  • Competence in Java programming
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
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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

These are just a small sample from our library of 10,000+ questions. The actual questions on this Java, Spring & SQL Test will be non-googleable.

🧐 Question

Easy

Custom Exception
Exception Handling
Custom Exceptions
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What does the following code output?
 image

Hard

Holding References
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What does the following Java code output?
 image

Medium

Abstract Interface
OOPs
Interfaces
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Given following interface:
 image
Which of these are correct classes?
 image

Medium

Garbage Collection
Garbage Collection
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After which line is "bs" object, created on Line 4, eligible for garbage collection?
 image

Hard

Static Init Blocks
OOPs
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What does the following code output?
 image
1) G A B E D H
2) G B A D E H
3) G B A D E H C F
4) C F G A B E D H
5) C F G B A D E H
6) G C F A B E D H
7) G C F B A D E H

Medium

Autowiring Service
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Review the following two Spring components- SampleA and SampleB:
 image
 image
Notice @Autowired line added to SampleService in SampleB (rest of the code is same for both components). What happens when the components are run as a @SpringBootApplication?
A: SampleA prints true null
B: SampleA prints true class package.SampleService
C: SampleA throws a null pointer exception
D: SampleA prints false null

E: SampleB prints true null
F: SampleB prints true class package.SampleService
G: SampleB throws a null pointer exception
H: SampleB prints false null

Medium

Bean init and afterPropertiesSet
Beans
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Spring allows specific operations to be performed after the bean is initialized and before the bean is destroyed. Review the following sample Bean that implements init method and overrides afterPropertiesSet. 
 image
Here’s the bean definition added to the configuration file:
 image
What does the code print when the Spring container is started?

Medium

Boot Autowiring
Spring Boot
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Review the following Spring Boot application code:
 image
Here are two possible SampleConfig class definitions:
 image
When the code is run as @SpringBootApplication, what would happen?

A: Using X as SampleConfig will print- true SimpleDateFormat
B: Using X as SampleConfig will print - true class java.text.SimpleDateFormat
C: Using X as SampleConfig will print a NullPointerException stacktrace
D: Using X as SampleConfig will print a BeanDefinitionParsingException stacktrace

E: Using Y as SampleConfig will print- true SimpleDateFormat
F: Using Y as SampleConfig will print - true class java.text.SimpleDateFormat
G: Using Y as SampleConfig will print a NullPointerException stacktrace
H: Using Y as SampleConfig will print a BeanDefinitionParsingException stacktrace

Medium

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

nth highest sales
Nested queries
User Defined Functions
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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
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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
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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
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Consider the following SQL table:
 image
How many tuples does the following query return?
 image

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

Easy

Custom Exception
Exception Handling
Custom Exceptions

2 mins

Java
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Hard

Holding References

2 mins

Java
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Medium

Abstract Interface
OOPs
Interfaces

2 mins

Java
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Medium

Garbage Collection
Garbage Collection

2 mins

Java
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Hard

Static Init Blocks
OOPs

2 mins

Java
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Medium

Autowiring Service

3 mins

Spring
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Medium

Bean init and afterPropertiesSet
Beans

2 mins

Spring
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Medium

Boot Autowiring
Spring Boot

3 mins

Spring
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Medium

Multi Select
JOIN
GROUP BY

2 mins

SQL
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Medium

nth highest sales
Nested queries
User Defined Functions

3 mins

SQL
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Medium

Select & IN
Nested queries

3 mins

SQL
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Medium

Sorting Ubers
Nested queries
Join
Comparison operators

3 mins

SQL
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Hard

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

2 mins

SQL
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Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Custom Exception
Exception Handling
Custom Exceptions
Java
Easy2 mins
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Holding References
Java
Hard2 mins
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Abstract Interface
OOPs
Interfaces
Java
Medium2 mins
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Garbage Collection
Garbage Collection
Java
Medium2 mins
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Static Init Blocks
OOPs
Java
Hard2 mins
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Autowiring Service
Spring
Medium3 mins
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Bean init and afterPropertiesSet
Beans
Spring
Medium2 mins
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Boot Autowiring
Spring Boot
Spring
Medium3 mins
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Multi Select
JOIN
GROUP BY
SQL
Medium2 mins
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nth highest sales
Nested queries
User Defined Functions
SQL
Medium3 mins
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Select & IN
Nested queries
SQL
Medium3 mins
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Sorting Ubers
Nested queries
Join
Comparison operators
SQL
Medium3 mins
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With, AVG & SUM
MAX() MIN()
Aggregate functions
SQL
Hard2 mins
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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

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!


Brandon Lee, Head of People, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Java, Spring & SQL Test 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 Java, Spring & SQL Test 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

Reason #7

Detailed scorecards & benchmarks

Along with scorecards that report the performance of the candidate in detail, you also receive a comparative analysis against the company average and industry standards.

View sample scorecard
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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.

test completion rate
Reason #9

Advanced Proctoring


Learn more

About the Java, Spring & SQL Assessment Test

Why you should use Pre-employment Java, Spring & SQL Online Test?

The Java, Spring & SQL Test 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:

  • Java syntax and basics
  • Java OOPs concepts and principles
  • Working with Databases in Java
  • Java data structures
  • Java exception handling
  • Understanding Java memory management
  • Basics of Spring framework
  • Spring bean lifecycle
  • Securing web applications with Spring Security
  • SQL CRUD Operations

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 Java, Spring & SQL Online Test?

  • Java syntax and basics

    Java syntax and basics refers to the fundamental rules and conventions that govern the structure and usage of the Java programming language. It includes understanding data types, variables, control flow statements, and basic operations. This skill is measured in the test to assess the candidate's understanding of the core concepts of Java programming.

  • Java OOPs

    Java OOPs (Object-Oriented Programming) is a programming paradigm that uses objects and classes to organize code. It includes concepts such as encapsulation, inheritance, polymorphism, and abstraction. This skill is measured in the test to evaluate the candidate's ability to apply object-oriented principles in Java programming.

  • Working with Databases in Java

    Working with Databases in Java refers to the ability to connect, interact, and manipulate data stored in relational databases using Java. It involves knowledge of JDBC (Java Database Connectivity) API, SQL queries, and data access patterns. This skill is measured in the test to assess the candidate's competence in working with databases and integrating them into Java applications.

  • Java data structures

    Java data structures involve the implementation and usage of various data structures such as arrays, lists, queues, stacks, trees, and graphs in Java programming. It includes understanding the functionality, efficiency, and appropriate usage of these data structures. This skill is measured in the test to evaluate the candidate's proficiency in data manipulation and problem-solving using Java data structures.

  • Basics of Spring framework

    Basics of Spring framework refers to understanding the core concepts and features of the Spring framework, which is a popular Java framework used for building enterprise applications. It includes knowledge of dependency injection, inversion of control, and the Spring container. This skill is measured in the test to assess the candidate's familiarity with the foundational concepts of the Spring framework.

  • Spring bean lifecycle

    Spring bean lifecycle refers to the series of steps and events that occur during the creation, initialization, and destruction of Spring beans. It involves understanding bean scopes, bean initialization and destruction callbacks, and bean post-processing. This skill is measured in the test to evaluate the candidate's understanding of the lifecycle management of Spring beans.

  • Securing web applications with Spring Security

    Securing web applications with Spring Security involves implementing security measures such as authentication, authorization, and access control in Spring-based web applications. It includes knowledge of Spring Security configuration, authentication providers, authorization rules, and securing RESTful APIs. This skill is measured in the test to assess the candidate's ability to ensure the security of web applications using the Spring Security framework.

  • SQL CRUD Operations

    SQL CRUD Operations refers to the basic create, read, update, and delete operations performed on a database using SQL (Structured Query Language). It includes writing SQL statements to manipulate data in tables, inserting new records, retrieving existing records, updating records, and deleting records. This skill is measured in the test to evaluate the candidate's proficiency in performing basic database operations using SQL.

  • SQL Joins and Indexes

    SQL Joins and Indexes involve combining data from multiple tables using join operations in SQL. It includes understanding different types of joins (e.g., inner join, outer join) and their usage, as well as creating and utilizing indexes for efficient data retrieval. This skill is measured in the test to assess the candidate's ability to work with complex SQL queries involving joins and optimize query performance using indexes.

  • Java Programming

    Java Programming refers to the overall ability to write, debug, and execute Java code to solve programming problems. It includes knowledge of syntax, control flow, data structures, algorithms, and best practices in Java development. This skill is measured in the test to evaluate the candidate's proficiency in general Java programming and problem-solving.

  • 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 Java, Spring & SQL Test to be based on.

    Variables
    Data Types
    Conditional Statements
    Loops
    Arrays
    Classes
    Inheritance
    Polymorphism
    Encapsulation
    Interfaces
    Exception Handling
    File Handling
    Collections
    Generics
    Multithreading
    Networking
    Input/Output (I/O)
    JDBC
    Hibernate
    JPA
    Spring Core
    Dependency Injection
    AOP (Aspect-Oriented Programming)
    DAO (Data Access Object)
    Spring MVC
    Spring ORM
    Spring Security
    Testing with JUnit
    RESTful Web Services
    JSON Processing
    XML Processing
    Transaction Management
    SQL Basics
    CRUD Operations
    SQL Joins
    SQL Indexes
    Database Normalization
    Query Optimization
    Entity-Relationship (ER) Modeling
    Concurrency Control
    Database Transactions
    ACID Properties
    Java Memory Management
    Design Patterns
    Maven
    Git
    Jenkins
    Continuous Integration (CI)
    Unit Testing
    Code Quality
    Debugging
    Logging
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What roles can I use the Java, Spring & SQL Online Test for?

  • Java Developer
  • Spring Developer
  • Backend Developer

How is the Java, Spring & SQL 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

  • SQL Joins and Indexes
  • Debugging and troubleshooting Java applications
  • Implementing RESTful web services with Spring
  • Unit testing Java code with JUnit
  • Design patterns in Java
  • Performance optimization of Java applications
  • Java multithreading and concurrency
  • Implementing caching strategies in Java
  • Optimizing database queries in Java
  • Working with Java collections and streams

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

Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.


85%
reduction in screening time

Java, Spring & SQL Hiring Test FAQs

Can I combine multiple skills into one custom assessment?

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.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Non-googleable questions
  • IP proctoring
  • Screen proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser
  • Copy paste protection

Read more about the proctoring features.

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.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

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.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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40 min tests.
No trick questions.
Accurate shortlisting.
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