Walmart Senior Procurement Analyst Interview Questions and Answers

Q1. Explain about past projects.
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Q2. Technology on which you worked.
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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. Question on trie
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Q2. Question on intervals
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Traverse through a matrix of uppercase english alphabets to find a given word. you are allowed to make up to k jumps, and same position can be repeated too.

Q1. Compression of 0-1 matrix of particular size.
Ans. 
Compression of 0-1 matrix involves reducing the size of the matrix by storing only the necessary information.
• Use run-length encoding to compress the matrix by storing consecutive repeated values as a single value and count.

• Identify patterns in the matrix that can be represented more efficiently.

• Consider using sparse matrix representation if the matrix has a lot of zeros.

• Implement efficient algorithms to compress and de...read more
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Basic aptitude on java application and framework

Q1. Experience on AWS and spring boot
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Q2. Principles to be followed while designing microservices application
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Design microservices with loose coupling, high cohesion, and fault tolerance.
• Decompose the application into small, independent services

• Use API gateways for service discovery and routing

• Implement fault tolerance with circuit breakers and retries

• Ensure each service has a single responsibility and is highly cohesive

• Use asynchronous communication between services

• Implement security and authentication at the API gateway leve...read more
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Q1. What is mutable type
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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
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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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