VRIZE Interview Questions and Answers

It was general aptitude test with quants

Q1. About Object Oriented programming
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Q2. Java collections, fundamentals of programming
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General aptitude round with quantitative, logic, reasoning questions

Q1. Explain about OOPs concepts
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OOPs concepts refer to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation detail
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Q2. Explain various data types
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Data types in programming define the type of data that can be stored and manipulated.
• Primitive data types: int, float, char, boolean

• Composite data types: array, struct, class

• Derived data types: pointer, function, reference

• Enumerated data types: enum
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Q1. General behavioural and fit check questions
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Q1. Difference between fail-fast and fail-safe iterators
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Fail-fast iterators throw ConcurrentModificationException if the collection is modified while iterating. Fail-safe iterators do not throw exceptions.
• Fail-fast iterators fail immediately if the collection is modified during iteration.

• Fail-safe iterators do not throw exceptions if the collection is modified during iteration.

• Fail-fast iterators are used in Java collections like ArrayList, HashMap.

• Fail-safe iterators are u...read more
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Q2. What is Zookeeper in Kafka
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Zookeeper in Kafka is a distributed coordination service used for managing and maintaining configuration information, naming, providing distributed synchronization, and group services.
• Zookeeper is used by Kafka to manage broker metadata, topic configurations, and consumer group coordination.

• It helps in leader election, maintaining cluster membership, and detecting failures.

• Zookeeper ensures consistency and reliability ...read more
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Q3. How do you change a monolith to microservices architecture
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Breaking down a monolith into microservices involves identifying bounded contexts, decoupling components, and implementing communication mechanisms.
• Identify bounded contexts within the monolith to define the boundaries of microservices.

• Decouple components by extracting them into separate services with well-defined interfaces.

• Implement communication mechanisms such as RESTful APIs or message queues to enable interaction...read more
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Q4. 1 Java coding question using streams
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Q5. Multiple questions on Spring
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Q1. Questions were based on work experience, like project responsibilities, how did you troubleshoot, how did you learn and apply in your work and in my case personal project also
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Q1. Typical HR round, questions were based on behavioural and psychological
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