UL Solutions Senior Software Engineer Interview Questions and Answers

Q1. Basic questions from your previous job profile.
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Q1. Advance level data structures and algorithms questions.
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Q1. Basic HR questions and hobbies.
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Q1. Introduction about yourself.
Ans. 
I am a software engineer with 5 years of experience in developing web applications.
• I have a strong proficiency in programming languages like Java, Python, and JavaScript.

• I have experience in working with frameworks like Spring Boot and Django.

• I am skilled in front-end development using HTML, CSS, and JavaScript.

• I have worked on database management systems like MySQL and MongoDB.

• I have knowledge of version control syste...read more
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Q2. Hashmap internal working
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Q1. Role check
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Q2. Tech stackP
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Q1. Project based questions
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Q2. AWS related questions
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Q1. Topics related react, typescript, OOPs
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Q2. Topics related optimizations
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Q1. Project related questions
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Q2. Question about certain libraries I have used previously.
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It was a test to create a login page and connect to database

Q1. What is difference between interface and abstract class
Ans. 
Interface is a contract with no implementation, while abstract class can have some implementation.
• Interface cannot have any implementation, only method signatures

• Abstract class can have both abstract methods and concrete methods

• A class can implement multiple interfaces but can only inherit from one abstract class

• Interfaces are used to achieve multiple inheritance in Java
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Q2. What are main concepts of oops
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Main concepts of OOP include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the nec
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Q1. Sort the array with duplicate values
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Use sorting algorithm like quicksort or mergesort to sort the array with duplicate values.
• Use a sorting algorithm like quicksort or mergesort to sort the array efficiently.

• Handle duplicate values by ensuring they are placed in the correct order during sorting.

• Consider using a hashmap to count the frequency of each element before sorting.
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Q1. Array question's, string basic, oops java, exception handling, collection, multi threading, hash map, system design, spring boot, singletons, seralisation and deserialisation in java ,synchronous
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Q1. Spring boot, database querying, indexing, rest API
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Q1. Palindrome program, why you want to join, about last company
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