ITC Infotech SAP SD Developer Interview Questions, Process, and Tips

It's walkin, so they conducted 1 technical mcqs round.

Q1. Multi threading
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Q2. Internal working of hashmap
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HashMap in Java is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values based on keys.
• HashMap uses an array of buckets to store key-value pairs.

• Keys are hashed to determine the index in the array where the key-value pair will be stored.

• In case of hash collisions, a linked list or a balanced tree is used to store multiple key-value pairs in the same bucket.

• HashMap allows null keys...read more
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Q3. Spring batch related
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Q4. Non repeating characters in a array
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Function to find and return all non-repeating characters in an array of strings.
• Iterate through the array and count the occurrences of each character using a HashMap.

• Then iterate through the array again and check if the count of each character is 1, if so add it to the result list.

• Return the list of non-repeating characters.
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Q5. 3rd highest salary
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To find the 3rd highest salary in a database, we can use a SQL query with the 'LIMIT' and 'OFFSET' keywords.
• Use a SQL query with 'ORDER BY salary DESC' to sort the salaries in descending order.

• Use 'LIMIT 1 OFFSET 2' to skip the first two highest salaries and retrieve the third highest salary.

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 2;
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Q6. Qualifier vs primary
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A qualifier in Java is used to specify additional information about a primary, which is the main data type or variable.
• A primary in Java is the main data type or variable, while a qualifier provides additional information about the primary.

• Qualifiers can be used to modify the behavior or characteristics of a primary.

• For example, in Java, 'final' is a qualifier that can be used to make a variable constant.
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Q7. Controller vs restcontroller
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The main difference is that @RestController is a specialized version of @Controller that is used for RESTful web services.
• Both @Controller and @RestController are used in Spring MVC to handle HTTP requests, but @RestController is specifically used for RESTful web services.

• @Controller is used to create web pages, while @RestController is used to return data in JSON or XML format.

• @RestController is a convenience annotati...read more
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Q8. Spring boot annotataions
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Q9. Oops concepts with examples
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OOP concepts include inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class. Example: class Dog extends Animal.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: private variables with public getter and setter methods.

• Polymorphism: Ability for objects to be treated as instances of their paren...read more
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Q10. Spring batch configuration
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Q11. They covered all java, spring and Microservices
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Q1. Microservices architecture
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Q2. How do Microservices communicate
Ans. 
Microservices communicate with each other through various communication protocols like HTTP, messaging queues, and gRPC.
• Microservices can communicate over HTTP using RESTful APIs.

• Messaging queues like RabbitMQ or Kafka can be used for asynchronous communication between microservices.

• gRPC is a high-performance, open-source RPC framework that can be used for communication between microservices.

• Service discovery mechanism...read more
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Q3. How to access the Microservice end point
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Microservice endpoints can be accessed using HTTP requests with the appropriate URL
• Use HTTP methods like GET, POST, PUT, DELETE to interact with the microservice

• Construct the URL with the base URL of the microservice and the specific endpoint path

• Include any necessary headers or parameters in the request for authentication or data filtering
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Q4. Why we use microservices
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Microservices allow for modular, scalable, and flexible software development by breaking down applications into smaller, independent services.
• Microservices enable easier maintenance and updates as each service can be developed, deployed, and scaled independently.

• They improve fault isolation, as failures in one service do not necessarily affect the entire application.

• Microservices promote agility and faster time-to-mark...read more
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Q1. Kth stair problem
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The Kth stair problem involves finding the number of ways to reach the Kth stair by taking 1 or 2 steps at a time.
• Use dynamic programming to solve this problem efficiently.

• The number of ways to reach the Kth stair is equal to the sum of ways to reach (K-1)th stair and (K-2)th stair.

• Base cases: For K=1, there is only 1 way. For K=2, there are 2 ways.

• Example: For K=4, there are 5 ways to reach the 4th stair - [1,1,1,1],
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Q2. Asteroid Collision
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Q1. Dbms questions On normalization , concurrency control and SQL queries
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Q2. Project related questions build and uploaded on my GitHub
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2 coding question (1st reverse a string without changing position of special character. 2nd remove elements before '#') + 20 mcqs

How to Improve software development process

Q1. Rearrange string
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Q2. Create form using react.js
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Q3. Longest prefix of strings in array
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Q1. Introduce your self
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Q2. Basic hr question
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Q1. Stream API related questions , methods etc.
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Q2. What is Qualifier and Primary
Ans. 
Qualifier and Primary are annotations used in Spring framework for dependency injection.
• Qualifier annotation is used to specify which bean should be autowired when multiple beans of the same type are present

• Primary annotation is used to specify the primary bean to be autowired when multiple beans of the same type are present

• Qualifier can be used in combination with Autowired annotation to specify the bean name to be in...read more
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Q3. Spring boot annotations
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Q4. Sort Array of 0 and 1
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Sort an array of 0s and 1s in linear time complexity.
• Use two pointers approach - one from the start and one from the end.

• Swap 0s to the left and 1s to the right until the pointers meet.

• Time complexity: O(n), Space complexity: O(1).
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Q5. How do you handle code reviews
Ans. 
I actively participate in code reviews to ensure code quality and learn from others.
• I actively participate in code reviews by providing constructive feedback on others' code.

• I also seek feedback on my own code to improve its quality and learn from others.

• I follow coding standards and best practices during code reviews to maintain consistency and quality.

• I use code review tools like GitHub pull requests or Bitbucket to
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Q1. Multithreading, Collection list
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Q2. Java Program on Strings, Threads
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Q1. Project Explanation
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Q2. Git Commands, Linux Commands
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I just need to speak fluently on a specific topic.

The online assessment consists of basic aptitude questions, three coding questions, and a section on pseudocode.

Q1. What are the differences and similarities between Java and Python, and which one is considered the best?
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Q2. Can you provide details about your project?
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Q3. What is testing, and what do you know about it?
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Q4. Write SQL joins queries
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Q1. What are the reasons you have not been placed in any company until now?
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Q2. Can you tell me about yourself?
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Q3. Can you describe a cooking disaster you experienced?
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Q1. How can you reverse a string that is stored in an array?
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Q2. Oops
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Q1. How do you feel about policies and location constraints?
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Q2. Okay with joining mphasis?
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Q1. Intro your self in detail
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I am a software developer with 5 years of experience in Java, Python, and SQL.
• 5 years of experience in Java, Python, and SQL

• Strong problem-solving skills

• Experience working in Agile development environment

• Bachelor's degree in Computer Science from XYZ University
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Q2. Explain about your projects
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