Euler Motors Software Engineer Interview Questions and Answers

Q1. Difference between IOC and DI?
Ans. 
IOC is a design pattern where control is inverted, while DI is a technique to achieve IOC by injecting dependencies into a class.
• IOC stands for Inversion of Control, where the control of flow is inverted from the traditional top-down approach.

• DI stands for Dependency Injection, a technique used to implement IOC by injecting dependencies into a class from an external source.

• IOC is a design principle, while DI is a techn...read more
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Q2. Exception handling in the spiring Boot?
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Exception handling in Spring Boot allows developers to gracefully handle errors and provide meaningful responses to users.
• Use @ControllerAdvice to handle exceptions globally

• Use @ExceptionHandler to handle specific exceptions

• Return custom error messages or responses to users
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Q3. @RequestBody annotation?
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Annotation used in Spring framework to bind the HTTP request body to a method parameter.
• Used in Spring MVC to indicate that a method parameter should be bound to the body of the web request.

• Can be used with various data types like JSON, XML, etc.

• Helps in simplifying the process of handling request data in Spring applications.
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Q4. Function and BiFunction?
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Q5. Equals and Hashcode ?
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Q6. Type casting in the Java?
Ans. 
Type casting in Java is the process of converting one data type into another.
• Type casting can be done implicitly or explicitly in Java.

• Implicit type casting is done when a smaller data type is converted to a larger data type, while explicit type casting is done when a larger data type is converted to a smaller data type.

• Example of implicit type casting: int num = 10; double result = num;

• Example of explicit type casting
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Q7. Intermediate and terminal operators in Java?
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Intermediate and terminal operators are used in Java streams to perform intermediate and terminal operations on elements.
• Intermediate operators are used to transform, filter, or manipulate elements in a stream before passing them to the next operation. Examples include map(), filter(), and sorted().

• Terminal operators are used to trigger the processing of elements in a stream and produce a result. Examples include forEa
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Q8. Functional interface in java?
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Functional interface in Java is an interface with only one abstract method. It can have multiple default or static methods.
• Functional interfaces can be annotated with @FunctionalInterface to ensure they have only one abstract method.

• Examples of functional interfaces in Java include Runnable, Callable, and ActionListener.

• Lambda expressions can be used to implement functional interfaces concisely.
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Q9. Various methods in the RestApi?
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Various methods in RestApi include GET, POST, PUT, DELETE.
• GET - Used to retrieve data from the server. Example: GET /users

• POST - Used to send data to the server to create a new resource. Example: POST /users

• PUT - Used to update an existing resource on the server. Example: PUT /users/1

• DELETE - Used to delete a resource on the server. Example: DELETE /users/1
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Q10. Coding question find the first non repeting char in the string using java 8.
Ans. 
Using Java 8, find the first non-repeating character in a string.
• Use Java 8 streams to convert the string to a character array.

• Use Collectors.groupingBy to group characters by count.

• Filter out characters with count > 1 and find the first character with count 1.
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Q11. Find the sum of all even numbers without using inbuild methods using stream api.
Ans. 
Sum of all even numbers without using inbuild methods using stream api
• Create an array of numbers

• Use stream to filter out even numbers

• Use stream to sum up the filtered even numbers
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Q1. How hard to do code
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Coding can be challenging but rewarding with practice and experience.
• Coding requires problem-solving skills and attention to detail.

• Practice and experience can make coding easier over time.

• Collaborating with others and seeking help when needed can make coding less difficult.

• Using tools and resources effectively can also help in coding efficiently.

• Examples: debugging a complex algorithm, optimizing code for performance,...read more
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Q2. How to acheive deaign patterns
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Design patterns can be achieved by understanding common software design problems and implementing reusable solutions.
• Understand common design problems and solutions

• Implement reusable solutions in code

• Use design patterns like Singleton, Factory, Observer, etc.

• Follow best practices and principles like SOLID
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Q3. How ti keep agile
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To keep agile, focus on communication, adaptability, collaboration, and continuous improvement.
• Communicate regularly with team members and stakeholders to stay aligned on goals and progress.

• Be willing to adapt to changing requirements and priorities.

• Collaborate closely with team members to share knowledge and expertise.

• Continuously seek feedback and look for ways to improve processes and workflows.
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Q4. How to make redis cache
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Redis cache can be created by setting up a Redis server and using Redis commands to store and retrieve data.
• Set up a Redis server on your machine or use a cloud-based Redis service.

• Use Redis commands like SET and GET to store and retrieve data in the cache.

• Set expiration times for keys to control cache eviction policies.

• Monitor cache performance and usage to optimize for efficiency.

• Consider using Redis data structures ...read more
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Q5. How to relive an existing offer
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To relive an existing offer, negotiate with the employer for better terms or consider accepting a counteroffer.
• Negotiate with the employer for better salary, benefits, or work conditions

• Consider accepting a counteroffer if it meets your expectations

• Communicate openly and professionally with the employer
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Normal questions was average

Q1. Very good f2f interview
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Q1. Coding ques were asked and i was given a code to write and questions from resume
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Q1. Telling about your self
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Q2. Why are you switch company
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First round include both aptitude and technical MCQ and one coding questions

They split the shortlisted candidates into two multiple groups each group consist of 10 members and interviewer give one topic and we have speak about it

Q1. Asked questions related to project
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Q2. Then asked questions related to OOPs
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GOOD, SOLVABLE CAN MAKE IT

CAN MAKE IT , BUT THJE PROBLEM STATEMENTS ARE QUITE TRICKY TO UNDERSTAND