Virtusa Consulting Services Lead Consultant Interview Questions and Answers

Best practices, issues faced, and their mitigation in the role of Lead Consultant

• Implementing regular communication channels to ensure effective collaboration among team members

• Establishing clear project goals and objectives to guide the team's efforts

• Identifying and addressing potential risks and challenges proactively

• Leveraging industry best practices and lessons learned from previous projects

• Encouraging continuous learning and professional development within the team

• Buildi...read more

I approach performance tuning of a stored procedure by analyzing query execution plans, optimizing indexes, and rewriting inefficient code.

• Analyze query execution plans to identify bottlenecks

• Optimize indexes to improve data retrieval speed

• Rewrite inefficient code to reduce unnecessary processing

• Consider parameter sniffing and data distribution for optimal performance

UNION combines the result sets of two or more SELECT statements, while UNION ALL does the same but includes duplicate rows.

• UNION removes duplicate rows from the result set, while UNION ALL includes all rows

• UNION is slower than UNION ALL because it has to perform a distinct operation

• UNION requires that all SELECT statements have the same number of columns with compatible data types

Yes, I am proficient in coding in Java 8.

• Lambda expressions

• Functional interfaces

• Streams API

• Optional class

• Method references

A recursive CTE (Common Table Expression) is a query that references itself within the query definition.

• Allows for hierarchical data querying

• Uses a base case and recursive member in the query

• Example: querying a table with parent-child relationship using recursive CTE

Solid principles are a set of design principles for writing clean, maintainable code.

• Single Responsibility Principle - A class should have only one reason to change. Example: A class that handles user authentication should not also handle database operations.

• Open/Closed Principle - Classes should be open for extension but closed for modification. Example: Using interfaces to allow for different implementations without changing existing code.

• Liskov Substitution Principle - Obj...read more

I have extensive project management experience and have successfully led multiple projects from initiation to closure.

• Experience in creating project plans, timelines, and budgets

• Ability to identify and mitigate project risks

• Strong communication and stakeholder management skills

• Experience in leading cross-functional teams

• Proficient in project management tools such as Microsoft Project and JIRA

Design patterns are reusable solutions to common problems in software design.

• Design patterns help in creating flexible, maintainable, and scalable software.

• Examples of design patterns include Singleton, Factory, Observer, and Strategy.

• They provide a common language for developers to communicate and understand each other's code.

• Design patterns can be categorized into creational, structural, and behavioral patterns.