Spring Online Test

The Spring test will assess candidates' ability to develop RESTful web services with Spring Boot and Sprint MVC, aspect-oriented programming with Spring AOP, data access with Spring JPA data modelling and authentication with Spring Security. The test will also have MCQ questions to evaluate Java fundamentals and coding questions to evaluate hands-on Java programming knowledge.

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Screen candidates with a 40 mins test

Test duration: ~ 40 mins

Difficulty level: Moderate

Availability: Available as custom test

Questions:

5 Java MCQs
5 Spring MCQs
1 Java Coding Question

Covered skills:

Basics of Spring framework

Spring bean lifecycle

Spring annotations

Building a Spring Boot web app

CRUD operations

Developing Spring REST API

Using MySQL with Spring Boot

JPA Data Modeling with Spring

Aspect-Oriented-Programming AOP

Troubleshooting Spring

Securing web applications with Spring Security

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Use the Spring Test to shortlist qualified candidates

The Spring 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:

Understanding the basics of the Spring framework
Managing Spring bean lifecycle
Utilizing Spring annotations effectively
Building a Spring Boot web application
Performing CRUD operations with Spring
Developing Spring REST APIs
Using MySQL with Spring Boot
Modeling JPA Data with Spring
Implementing Aspect-Oriented Programming (AOP) with Spring
Troubleshooting Spring applications
Securing web applications with Spring Security

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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 Spring Online Test will be non-googleable.

🧐 Question
Easy Custom Exception Exception Handling Custom Exceptions	Solve
What does the following code output?
Hard Holding References	Solve
What does the following Java code output?
Medium Abstract Interface OOPs Interfaces	Solve
Given following interface: Which of these are correct classes?
Medium Garbage Collection Garbage Collection	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
Hard Static Init Blocks OOPs	Solve
What does the following code output? 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: 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. Here’s the bean definition added to the configuration file: What does the code print when the Spring container is started?
Medium Boot Autowiring Spring Boot	Solve
Review the following Spring Boot application code: Here are two possible SampleConfig class definitions: 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
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
What does the following code output?
	Hard Holding References	2 mins Java	Solve
What does the following Java code output?
	Medium Abstract Interface OOPs Interfaces	2 mins Java	Solve
Given following interface: Which of these are correct classes?
	Medium Garbage Collection Garbage Collection	2 mins Java	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
	Hard Static Init Blocks OOPs	2 mins Java	Solve
What does the following code output? 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	3 mins Spring	Solve
Review the following two Spring components- SampleA and SampleB: 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	2 mins Spring	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. Here’s the bean definition added to the configuration file: What does the code print when the Spring container is started?
	Medium Boot Autowiring Spring Boot	3 mins Spring	Solve
Review the following Spring Boot application code: Here are two possible SampleConfig class definitions: 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
	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
	Custom Exception Exception Handling Custom Exceptions	Java	Easy	2 mins	Solve
What does the following code output?
	Holding References	Java	Hard	2 mins	Solve
What does the following Java code output?
	Abstract Interface OOPs Interfaces	Java	Medium	2 mins	Solve
Given following interface: Which of these are correct classes?
	Garbage Collection Garbage Collection	Java	Medium	2 mins	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
	Static Init Blocks OOPs	Java	Hard	2 mins	Solve
What does the following code output? 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
	Autowiring Service	Spring	Medium	3 mins	Solve
Review the following two Spring components- SampleA and SampleB: 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
	Bean init and afterPropertiesSet Beans	Spring	Medium	2 mins	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. Here’s the bean definition added to the configuration file: What does the code print when the Spring container is started?
	Boot Autowiring Spring Boot	Spring	Medium	3 mins	Solve
Review the following Spring Boot application code: Here are two possible SampleConfig class definitions: 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
	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.

Test candidates on core Spring Hiring Test topics

Basics of Spring framework: The basics of Spring framework includes understanding the core concepts of Spring such as Inversion of Control, Dependency Injection, and Aspect-Oriented Programming. It also involves knowledge of Spring container, bean configuration, and the various modules available in Spring ecosystem. This skill is measured in the test to assess the candidate's foundational knowledge of Spring and their ability to work with its key components.

Spring bean lifecycle: Understanding the Spring bean lifecycle is essential for managing the creation and destruction of beans in a Spring application. This includes knowing the different lifecycle stages, the methods that can be implemented at each stage, and how to customize the lifecycle behavior through interfaces such as InitializingBean and DisposableBean. This skill is measured in the test to evaluate the candidate's proficiency in managing bean lifecycle and ensuring proper bean initialization and destruction.

Spring annotations: Spring annotations provide a concise and declarative way to configure Spring components and simplify the configuration process. They include annotations like @Component, @Autowired, @Controller, and @RequestMapping. Familiarity with these annotations is crucial for efficiently configuring Spring beans and enabling the various Spring features. This skill is measured in the test to assess the candidate's understanding of annotations and their ability to leverage them for effective Spring configuration.

Building a Spring Boot web app: Building a Spring Boot web application involves creating a web application using the Spring Boot framework. This includes configuring the application, defining controllers, implementing RESTful endpoints, and handling requests and responses. A solid understanding of building a Spring Boot web app is important in order to develop scalable and maintainable web applications using Spring. This skill is measured in the test to evaluate the candidate's ability to develop web applications using Spring Boot and understand its key components.

CRUD operations: CRUD operations refer to Create, Read, Update, and Delete operations performed on data. In the context of Spring, it involves implementing these operations using Spring Data JPA or Spring JDBC. Understanding CRUD operations is essential for building data-driven applications and manipulating data in a persistent storage. This skill is measured in the test to assess the candidate's proficiency in performing CRUD operations efficiently using Spring.

Developing Spring REST API: Developing Spring REST APIs involves designing and implementing RESTful endpoints using Spring MVC or Spring WebFlux. This includes handling HTTP methods, request and response bodies, and implementing features like content negotiation and error handling. Proven experience in developing Spring REST APIs is crucial for building scalable and interoperable web services. This skill is measured in the test to evaluate the candidate's ability to design and develop RESTful APIs using Spring.

Using MySQL with Spring Boot: Using MySQL with Spring Boot involves integrating a MySQL database with a Spring Boot application. This includes configuring data source, performing database operations using Spring Data JPA, and managing transactions. Familiarity with using MySQL with Spring Boot is important for developing data-centric applications that leverage the power of relational databases. This skill is measured in the test to assess the candidate's ability to effectively work with MySQL in a Spring Boot environment.

JPA Data Modeling with Spring: JPA data modeling with Spring involves designing and implementing a data model using JPA (Java Persistence API) and Spring. This includes entity mapping, defining relationships between entities, and utilizing features like lazy loading and eager fetching. Proficiency in JPA data modeling with Spring is essential for implementing scalable and efficient data access layers. This skill is measured in the test to evaluate the candidate's ability to design and implement sophisticated data models using JPA and Spring.

Aspect-Oriented-Programming AOP: Aspect-Oriented Programming (AOP) is a programming paradigm that aims to modularize cross-cutting concerns in an application. In the context of Spring, it involves using AOP to separate concerns such as logging, transaction management, and security from the core business logic. Understanding AOP and its integration with Spring is crucial for developing modular and maintainable applications. This skill is measured in the test to assess the candidate's understanding of AOP concepts and their ability to apply AOP principles in Spring applications.

Troubleshooting Spring: Troubleshooting Spring involves identifying and resolving issues in Spring applications. This requires knowledge of common errors, debugging techniques, and familiarity with tools like Spring Boot Actuator. Strong troubleshooting skills in Spring are essential for maintaining robust and reliable applications. This skill is measured in the test to evaluate the candidate's ability to diagnose and resolve issues in Spring-based systems.

Securing web applications with Spring Security: Securing web applications with Spring Security involves implementing authentication and authorization mechanisms to protect application resources. This includes configuring security rules, integrating with authentication providers, and implementing access control mechanisms. Sound knowledge of Spring Security is important for developing secure and protected web applications. This skill is measured in the test to assess the candidate's ability to implement security features using Spring Security and ensure the safety of web applications.

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