McKinsey & Company Senior Engineer Interview Questions and Answers

Q1. Explain about past projects.
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Q2. Technology on which you worked.
Ans. 
I have worked on various technologies including Java, Python, AWS, and Docker.
• Developed RESTful APIs using Java and Spring framework

• Implemented machine learning models using Python and scikit-learn library

• Deployed applications on AWS using EC2, S3, and RDS

• Containerized applications using Docker for easy deployment and scaling
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Q3. C language basic but important concepts related to Data type, pointer, etc.
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Q4. Python knowledge check.
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Q1. SQL databse,oops
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Dsa questions like search sort

Basic aptitude on java application and framework

Q1. What is mutable type
Ans. 
A mutable type is a data type whose values can be changed after they are created.
• Mutable types include lists, dictionaries, and sets in Python.

• Changes to mutable objects affect all references to that object.

• Example: list1 = [1, 2, 3], list1[0] = 4 will change the value of list1 to [4, 2, 3].
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Q2. What is functional interface
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A functional interface is an interface that contains only one abstract method.
• Functional interfaces can have multiple default or static methods.

• Examples include Runnable, Callable, and ActionListener interfaces.

• Functional interfaces can be implemented using lambda expressions.
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Q3. Updates in java 17
Ans. 
Java 17 introduces new features like sealed classes, pattern matching for switch statements, and more.
• Sealed classes restrict which classes can be subclasses

• Pattern matching for switch statements simplifies code by combining declaration and assignment

• New APIs like JEP 356: Enhanced Pseudo-Random Number Generators
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Q1. Oops, microservices, core java, spring boot?
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Q2. Data base design, performance related, coding
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Q1. Tell me something about your self?
Ans. 
I am a dedicated and experienced Senior Engineer with a strong background in project management and problem-solving.
• Over 10 years of experience in engineering field

• Expertise in project management and team leadership

• Strong problem-solving skills and attention to detail

• Proficient in various engineering software and tools

• Excellent communication and interpersonal skills
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Q2. Why deloitte? and Us
Ans. 
Deloitte is a global leader in consulting and technology services, offering exciting opportunities for growth and innovation.
• Deloitte is a prestigious global consulting firm known for its innovative solutions and industry expertise

• Deloitte offers a wide range of opportunities for career growth and development

• Deloitte values diversity and inclusion, creating a supportive and collaborative work environment

• Deloitte's focu...read more
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