Sensea Marine Services Interview Questions and Answers

Q1. What is endianness and wrote c program for endianness
Ans. 
Endianness refers to the order in which bytes are stored in memory. There are two types: big-endian and little-endian.
• Big-endian systems store the most significant byte first, while little-endian systems store the least significant byte first.

• Endianness can affect how data is interpreted and manipulated in a computer system.

• Example: In a big-endian system, the number 0x12345678 would be stored as 12 34 56 78 in memory.

• ...read more
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Q2. Basic sring programs
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Round 1 was both technical and aptitude round

Designing round task is given for around 10 days

Q1. Introduce yourself
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Q2. Questions around technical
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Consists of both technical and aptitude

Q1. Problem statement are given
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Q2. We have to crack this round to enter in 3rd round
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Q1. Both Technical and HR round happened
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English Grammar, Vocabulary, Logical thinking, Mathematics

Q1. Your speed will be tested and minimum speed of 30 words per minute is required
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Q1. Myself, Shipping Knowledge, Communication skills, excel knowledge, powerpoint,etc.
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Had the coding round and we have to solve the find nth largest element.

Q1. Java 8 concepts and oops concepts
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Q1. What are the various mechanisms, apart from synchronized locks, to restrict multiple threads from making modifications in Java?
Ans. 
Java provides several mechanisms beyond synchronized locks to manage thread safety and restrict concurrent modifications.
• 1. ReentrantLock: A more flexible locking mechanism that allows for timed and interruptible locks. Example: ReentrantLock lock = new ReentrantLock();

• 2. ReadWriteLock: Allows multiple threads to read but only one to write, improving performance for read-heavy scenarios. Example: ReadWriteLock rwLock =...read more
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Q2. What are the methods for implementing Interprocess Communication in a Microservice Architecture?
Ans. 
Interprocess Communication in microservices can be achieved through various methods like REST, messaging queues, and gRPC.
• RESTful APIs: Services communicate over HTTP using JSON or XML. Example: A user service fetching data from an order service.

• Message Queues: Asynchronous communication using tools like RabbitMQ or Kafka. Example: Order service sending messages to a payment service.

• gRPC: High-performance RPC framework...read more
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Q3. How can multiple requests to modify specific rows be restricted using the DataJPA interface in Spring Data JPA?
Ans. 
Use optimistic locking and transaction management to restrict concurrent modifications in Spring Data JPA.
• Implement optimistic locking using @Version annotation in your entity class.

• Use @Transactional annotation to manage transactions effectively.

• Handle OptimisticLockingFailureException to manage conflicts gracefully.

• Consider using pessimistic locking with EntityManager for critical sections.
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Q4. What are the different types of JVM memory and their uses?
Ans. 
JVM memory is divided into several areas, each serving specific purposes for efficient memory management in Java applications.
• Heap Memory: Used for dynamic memory allocation for Java objects. Example: Objects created using 'new'.

• Stack Memory: Stores method call frames, local variables, and references. Example: Primitive data types and object references.

• Method Area: Contains class-level data such as class structures, me...read more
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Q5. What is the purpose of the String Constant Pool in Java?
Ans. 
The String Constant Pool optimizes memory usage by storing unique string literals in Java.
• Strings are immutable in Java, meaning once created, they cannot be changed.

• The String Constant Pool is a special memory area in the Java heap.

• When a string literal is created, Java checks the pool first to see if it already exists.

• If it exists, the reference to the existing string is returned; if not, a new string is created.

• Exam...read more
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Q1. Why youre looking for this position
Ans. 
I'm excited about this position to leverage my skills in software development and contribute to innovative projects in a dynamic team.
• I admire the company's commitment to cutting-edge technology, like their recent advancements in AI and machine learning.

• I am eager to work in a collaborative environment where I can learn from experienced engineers and share my knowledge.

• This role aligns perfectly with my career goals, a...read more
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Q2. What was the biggest challange you came across and how you dealt with it
Ans. 
Faced a critical deadline with a complex project; implemented agile practices to enhance team collaboration and deliver on time.
• Identified the challenge: A major project was falling behind schedule due to unclear requirements and team miscommunication.

• Implemented daily stand-ups to improve communication and ensure everyone was aligned on tasks and priorities.

• Utilized agile methodologies, breaking the project into small...read more
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Q1. Two online questions to know your personality traits.
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Q1. Team handling situation based questions.
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Q2. Certification related questions
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Q3. Past experiences based
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Q1. Lean based questions
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Q2. Team handling situations
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Q3. Past experience based
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Basics of Mechanical Engineering

Q1. Tolerance Stack Up
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