Angel One Software Development Engineer Interview Questions and Answers

To find the maximum water pond formed between buildings.

• Identify the lowest point between the buildings.

• Calculate the area of the pond using the distance between the buildings and the depth of the pond.

• Consider any obstacles or uneven ground that may affect the pond's shape.

• Use a surveying tool or satellite imagery to get accurate measurements.

• Take into account any drainage systems or natural water flow that may affect

Design a dictionary using trie with insert, update and delete operations.

• Implement a Trie data structure with nodes containing a character and a boolean flag to indicate end of word

• For insert operation, traverse the trie and add nodes for each character in the word

• For update operation, delete the existing word and insert the updated word

• For delete operation, mark the end of word flag as false and delete the node if it ...read more

Find the odd repeating element from an array of strings

• Use a hash table to count the frequency of each element

• Iterate through the hash table to find the element with an odd count

Finding an element in a sorted 2D matrix

• Start from the top right corner or bottom left corner

• Compare the target element with the current element

• Move left or down if the target is smaller, else move right or up

• Repeat until the target is found or all elements are checked

SQL query to find Nth highest salary from table

• Use ORDER BY and LIMIT clauses

• Use subquery to get the Nth highest salary

• Handle cases where there are less than N distinct salaries

Function to swap '3' and '4' without using if-else

• Use XOR operator to swap the values

• Convert the input to ASCII code and perform the swap

• Use a lookup table to map the values

I am a software developer with experience in Java and Python.

• Proficient in Java and Python programming languages

• Experience in developing web applications using Spring framework

• Familiarity with database management systems like MySQL and MongoDB

PAYTM is a leading digital payment platform in India with a wide range of services.

• PAYTM has a user-friendly interface and offers a seamless payment experience.

• It provides a variety of services like mobile recharges, bill payments, and online shopping.

• PAYTM has a strong focus on security and fraud prevention measures.

• It has a large user base and is widely accepted by merchants across India.

• PAYTM is constantly innovatin...read more

Yes, I am open to pursuing further studies in the future.

• I believe in continuous learning and staying updated with the latest technologies.

• Further studies can help me specialize in a particular field and enhance my skills.

• I may consider pursuing a master's degree in computer science or a related field.

• However, my immediate focus is on gaining practical experience and contributing to the organization.

PAYTM grew fast due to its innovative approach and early adoption of digital payments.

• Early adoption of digital payments in India

• Innovative approach with features like mobile recharges, bill payments, and cashback offers

• Expansion into e-commerce and financial services

• Strategic partnerships with major companies like Uber and Alibaba

Race condition is a situation where multiple threads/processes access and manipulate shared data simultaneously.

• It can be eliminated by using synchronization techniques like locks, semaphores, and mutexes.

• Another way is to use atomic operations that ensure the data is accessed and modified atomically.

• Using thread-safe data structures can also prevent race conditions.

• Example: Two threads trying to increment a shared var...read more

JCube is a Java library for creating and manipulating Rubik's Cube puzzles.

• JCube provides classes for representing Rubik's Cube puzzles and algorithms for solving them.

• It supports various cube sizes and can generate random scrambles.

• JCube can be used in Java applications or as a standalone command-line tool.

• It is open source and available on GitHub.

Regression testing is the process of testing changes made to a software application to ensure that existing functionality still works.

• It is performed after making changes to the software

• It ensures that existing functionality is not affected by the changes

• It helps to catch any defects or bugs that may have been introduced

• It can be automated using testing tools

• Examples include retesting after bug fixes, testing after new

Software engineering principles are the best practices and guidelines for developing high-quality software.

• Software should be designed with modularity and scalability in mind.

• Code should be well-documented and easy to read.

• Testing and debugging should be an integral part of the development process.

• Version control should be used to manage code changes.

• Security and privacy should be considered throughout the development

A Singleton class is a class that can only have one instance at a time.

• It restricts the instantiation of a class to a single object.

• It provides a global point of access to that instance.

• It is often used in situations where a single object is required to coordinate actions across a system.

• Example: Database connection manager, Configuration manager, Logger manager.

Testing principles ensure software quality, while design principles guide software development.

• Testing principles include unit testing, integration testing, and acceptance testing.

• Design principles include SOLID, DRY, and KISS.

• Testing principles ensure that software meets requirements and is free of defects.

• Design principles guide software development to be modular, maintainable, and scalable.

I have the necessary skills, experience, and passion to contribute to VISA's success.

• I have a strong background in software development and have worked on projects similar to those at VISA.

• I am a quick learner and can adapt to new technologies and programming languages easily.

• I am passionate about creating high-quality software that meets the needs of users and exceeds their expectations.

• I am a team player and can work...read more

A profile that challenges me to learn and grow while allowing me to contribute to a team.

• A position that encourages continuous learning and development

• A role that allows me to collaborate with a team and contribute to projects

• A company culture that aligns with my values and work ethic

I am interested in exploring new opportunities and challenges that this company can offer.

• I am impressed with the company's reputation and growth potential.

• I am excited about the projects and technologies this company is working on.

• I believe this company can provide me with a better work-life balance and career growth opportunities.

• I am looking for a company culture that aligns with my values and goals.

• I am open to exp...read more