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Java, Spring & SQL Online 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.

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Screen candidates with a 50 mins test

Test duration:  50 mins
Difficulty level:  Moderate
Availability:  Ready to use
Questions:
  • 5 Java MCQs
  • 4 Spring MCQs
  • 4 SQL MCQs
  • 1 Java Coding Question
Covered skills:
Java syntax and basics
Java OOPs
Working with Databases in Java
Java data structures
Basics of Spring framework
Spring bean lifecycle
Securing web applications with Spring Security
SQL CRUD Operations
SQL Joins and Indexes
Java Programming
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Use the Java, Spring & SQL Test to shortlist qualified candidates

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
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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 Java, Spring & SQL Test will be non-googleable.

🧐 Question

Easy

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

Hard

Holding References
Solve
What does the following Java code output?
 image

Medium

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

Medium

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

Hard

Static Init Blocks
OOPs
Solve
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
Solve
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
Solve
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
Solve
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
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

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
Solve

Hard

Holding References

2 mins

Java
Solve

Medium

Abstract Interface
OOPs
Interfaces

2 mins

Java
Solve

Medium

Garbage Collection
Garbage Collection

2 mins

Java
Solve

Hard

Static Init Blocks
OOPs

2 mins

Java
Solve

Medium

Autowiring Service

3 mins

Spring
Solve

Medium

Bean init and afterPropertiesSet
Beans

2 mins

Spring
Solve

Medium

Boot Autowiring
Spring Boot

3 mins

Spring
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

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
Solve
Holding References
Java
Hard2 mins
Solve
Abstract Interface
OOPs
Interfaces
Java
Medium2 mins
Solve
Garbage Collection
Garbage Collection
Java
Medium2 mins
Solve
Static Init Blocks
OOPs
Java
Hard2 mins
Solve
Autowiring Service
Spring
Medium3 mins
Solve
Bean init and afterPropertiesSet
Beans
Spring
Medium2 mins
Solve
Boot Autowiring
Spring Boot
Spring
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
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve

Test candidates on core Java, Spring & SQL Hiring Test topics

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.

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Have questions about the Java, Spring & SQL 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 Java, Spring & SQL Test for?

Here are few roles for which we recommend this test:

  • Java Developer
  • Spring Developer
  • Backend 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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