Deloitte Java Consultant Interview Questions and Answers

Q1. They basically asked questions related to your project.
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Q2. Then asked design patters and related questions to it.
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Q3. Asked SOLID principal of software development.
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Q4. Gave some coding questions related to Java array where I had to return the index of values whos total is 10.
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Q5. How you would connect springboot project with data base.
Ans. 
Use Spring Data JPA to connect Spring Boot project with database.
• Add database configuration in application.properties or application.yml file

• Create entity classes annotated with @Entity and @Table

• Create repository interfaces extending JpaRepository

• Use @Autowired annotation to inject repository in services or controllers
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Q1. 1. Diff between static keyword and final keyword 2. Different ways of creating thread and which approach is better 3. Pgm to find min word and max word in a sentence
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The questions are related to Java programming and do not involve the medical field or puzzles.
• The static keyword is used to declare a variable or method that belongs to the class itself, rather than an instance of the class.

• The final keyword is used to declare a constant value or to prevent a variable, method, or class from being modified or extended.

• Different ways of creating threads in Java include extending the Thre...read more
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Q1. 1, What are the purposes of api gateway other then authentication 2. how circut breaker works 3. What is saga design pattern 4. What is primary and secondary caching
Ans. 
API gateway serves as a central entry point for all client requests, providing various functionalities beyond authentication.
• API gateway acts as a reverse proxy, routing requests to appropriate microservices.

• It can handle request/response transformation, protocol translation, and payload encryption/decryption.

• API gateway can implement rate limiting, throttling, and caching to improve performance.

• It enables service disc...read more
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Q1. Sort list of employee using stream concept and comparator based on employee number.
Ans. 
Sort list of employees by employee number using streams and comparator.
• Use Stream API to convert list to stream

• Use Comparator to compare employee numbers

• Use sorted() method to sort the stream based on comparator
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Q2. Thread life cycle
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Aptitude test with Java MCQ questions

Basic programs in Java

Q1. Salary discussion
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Q1. DSA Collection Spring boot Java 8
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Q1. Oops, Multithreading,DSA,Design Pattern
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There were 2 questions and I was supposed to write the code inside the function but the input to the function is not given correctly. Instead of giving a list to sort, I was given a single value for a function to sort.