NTT Data Senior Developer Interview Questions and Answers

Q1. Difference between custom setting and custom metadata
Ans. 
Custom settings are org-specific, while custom metadata can be deployed across orgs.
• Custom settings are hierarchical and can be accessed using a hierarchy custom setting type

• Custom metadata is deployable and can be used in managed packages

• Custom settings are stored in the application cache, while custom metadata is stored in the metadata cache
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Q2. Difference between profile and role
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Profile is a summary of a person's skills and experience, while role is the specific job or position they hold within an organization.
• Profile is a broader overview of a person's qualifications and background.

• Role is a specific set of responsibilities and tasks assigned to an individual within a company.

• Profiles can include education, work experience, skills, and achievements.

• Roles can be defined by job titles such as S...read more
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Sample code round to implement the weather API

Q1. Discussion about salary package
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Q1. Explain oops concepts
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Object-oriented programming concepts 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 details and showing only the ne
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Q2. Explain solid principles
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SOLID principles are a set of five design principles that help developers create more maintainable and scalable software.
• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with objects of its subcla...read more
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Q1. Explain java 8 features
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Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to write code in a more concise way.

• Functional interfaces are interfaces with a single abstract method, used for lambda expressions.

• Streams provide a way to work with sequences of elements.

• Default methods allow interfaces to have method implementations.

• Example: Lambda exp...read more
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Q2. Spring boot architecture
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Q1. In kafka how multiple consumer can access same messages?
Ans. 
Multiple consumers can access the same messages in Kafka by using consumer groups.
• Consumers can be grouped together to share the workload of processing messages.

• Each consumer in a group will receive a subset of the messages from the same topic.

• Consumers in the same group will coordinate to ensure that each message is processed only once.

• Consumer offsets are used to track the progress of each consumer in the group.
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Q2. Any Design patterns if used in the current project
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Yes, we have used the Factory Method and Singleton design patterns in the current project.
• Factory Method pattern was used to create objects without specifying the exact class of object that will be created.

• Singleton pattern was used to ensure a class has only one instance and provide a global point of access to it.
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Q1. Techical interview on itsm process
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