Hitachi Digital Services Interview Questions, Process, and Tips

It contains quant, logical and pseudo code

It contains 2 coding questions

Q1. About java and general questions
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Q1. Basic Questions
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Includes coding questions, aptitude mcqs and technical mcqs

Q1. Basic questions about technical knowledge topics includes oops, dsa, dbms.
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Q2. Tell me about inheritance, polymorphism.
Ans. 
Inheritance allows a class to inherit attributes and methods from another class, while polymorphism allows objects of different classes to be treated as objects of a common superclass.
• Inheritance is a mechanism in OOP where a new class inherits properties and behaviors from an existing class.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Example of inheritance: class Ca...read more
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Q1. Tell me about yourself?
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Q2. Your hobbies, about family
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Included questions from Database, basic quant, 2 coding questions, cloud, operating systems.

Q1. Asked me to code a Fibonacci sequence.
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Q1. Asked me basic questions about why do I wanna join the company, my strengths and weaknesses etc.
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Q2. Gave me certain logical puzzles to understand problem solving.
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Q1. Current Role in Team
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Q2. Describe Application Architecture
Ans. 
Application architecture refers to the design and organization of software applications.
• It includes the selection of technologies, frameworks, and patterns.

• It defines the components, modules, and layers of the application.

• It determines the communication and interaction between different parts of the application.

• It considers factors such as scalability, security, and maintainability.

• Examples include client-server archit...read more
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Q3. How will you implement microservice architecture for your app, design patterns to use
Ans. 
I will implement microservice architecture using containerization and API gateway pattern.
• Identify the bounded contexts and break down the monolith into smaller services

• Use containerization tools like Docker and Kubernetes for deployment and scaling

• Implement API gateway pattern to manage the communication between services

• Use service discovery tools like Consul or Eureka for service registration and discovery

• Implement f...read more
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Q4. AWS Basic Question,One Code question on java pattern
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Q1. Leadership Role question,agile framework questions how will you estimate a feature,how will you split etc.
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Q2. Microservice design patterns
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Q3. Describe which service of AWS used
Ans. 
AWS offers a wide range of services, including compute, storage, databases, analytics, machine learning, and more.
• EC2 for compute

• S3 for storage

• RDS for databases

• Redshift for analytics

• SageMaker for machine learning

• Lambda for serverless computing
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