Ultramain Systems Java Software Engineer Interview Questions and Answers

Find peak in array in less than O(n) time

• Use binary search to find peak element

• Compare middle element with its neighbors to determine direction

• Repeat search in direction of larger neighbor until peak is found

Find the next largest in the right side for every array element.

• Iterate through the array from right to left

• Use a stack to keep track of elements

• Pop elements from stack until a greater element is found

• If no greater element is found, assign -1

Find shortest path in 0,1 matrix from (0,0) to (n-1,n-1)

• Use Breadth First Search (BFS) algorithm to find shortest path

• Create a visited matrix to keep track of visited nodes

• Create a distance matrix to keep track of distance from source node

• Start BFS from (0,0) and keep updating visited and distance matrices

• Return distance value at (n-1,n-1) in distance matrix

Finding the shortest super common string among an array of strings.

• Create a set of all substrings of the first string

• Iterate through the remaining strings and remove substrings not present in them

• Return the shortest remaining substring

A user microservice to retrieve data from h2DB

• Create a REST API endpoint to handle user requests

• Use JDBC to connect to the h2DB and retrieve data

• Implement caching to improve performance

• Ensure proper error handling and logging

• Secure the API with authentication and authorization

To create thread singleton, use double-checked locking or enum.

• Use double-checked locking to ensure only one instance is created

• Alternatively, use enum to create a singleton with thread safety

• Ensure proper synchronization to avoid race conditions

Spring Boot Starter POM is a parent POM that provides a set of dependencies for Spring Boot applications.

• It includes commonly used dependencies such as Spring Framework, Spring Boot, and Spring Data.

• It simplifies the process of configuring and deploying Spring Boot applications.

• Developers can add additional dependencies to the POM file as needed.

• Examples of Spring Boot Starter POMs include spring-boot-starter-web, spri...read more

Yes, Infosys is listed on the Indian stock exchanges as well as on the NYSE.

• Infosys is listed on the Bombay Stock Exchange (BSE) and National Stock Exchange of India (NSE)

• It is also listed on the New York Stock Exchange (NYSE)

• Infosys has a market capitalization of over $80 billion as of 2021

I'm seeking new challenges and opportunities for growth that align with my career goals and aspirations.

• Desire for professional growth: I'm looking to expand my skill set and take on more leadership responsibilities.

• Seeking a better cultural fit: My current company has a different work culture than what I thrive in; I value collaboration and innovation.

• Interest in new technologies: I'm excited about working with cuttin...read more