HTC Global Services SQL Developer Interview Questions and Answers

Q1. Questions on core java, Collections, Oops concepts
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Q1. Explain singleton design pattern
Ans. 
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Ensures a class has only one instance by providing a global access point to it

• Uses a private constructor to restrict instantiation of the class

• Provides a static method to access the single instance

• Commonly used in scenarios where only one instance of a class is needed, such as database connections or configuration
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Q1. Technical interview is depend on client
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Q1. Architecture of software
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Software architecture refers to the high-level structures of a software system and the discipline of creating such structures.
• Software architecture defines the components, relationships, and interactions of a system.

• It involves making decisions about the organization of a system to meet specific requirements.

• Common architectural styles include client-server, layered, and microservices.

• Architectural patterns like MVC an...read more
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Q1. Basic Java Question
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Q2. Spring Boot related questions
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Q1. Design a rest API and code it.
Ans. 
Design and code a REST API for a software developer interview.
• Define the endpoints and HTTP methods for the API (e.g. GET /users, POST /users)

• Implement authentication and authorization mechanisms (e.g. JWT tokens)

• Use proper status codes for responses (e.g. 200 OK, 401 Unauthorized)

• Include error handling and validation for input data

• Document the API using tools like Swagger or OpenAPI
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Q2. Questions related to JPA HIBERNATE SQL
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Q1. Discussion related to Last company Project and architecture level questions
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Q2. Write code to calculate frequency of a word using Stream API and lambda expressions
Ans. 
Calculate word frequency using Stream API and lambda expressions
• Use Stream API to convert array of strings to stream

• Use Collectors.groupingBy to group words by their frequency

• Use Collectors.counting to count the occurrences of each word
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Q1. Basic CSS, Event Loop, Callback, promises, js programming, tricky questions
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Q1. Callback, clouser,
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Q1. Related to DBMS, CPP, C,HTML, CSS
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Normal maths question and programming mcq

2 coding question of java

Q1. Normal conversation of your resume and achievements
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