Walmart Interview Questions, Process, and Tips

Q1. What do you know about catalog analyst role?
Ans. 
Catalog Analyst role involves managing product data, ensuring accuracy and consistency in catalogs.
• Responsible for creating, updating, and maintaining product catalogs

• Ensuring accuracy and consistency of product data

• Analyzing catalog performance and making recommendations for improvements

• Collaborating with cross-functional teams such as marketing, sales, and product development

• Knowledge of data management systems and t
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Q2. Any 5 excel shortcuts
Ans. 
Five useful Excel shortcuts for efficient data analysis.
• Ctrl + C: Copy selected cells

• Ctrl + V: Paste copied cells

• Ctrl + Z: Undo previous action

• Ctrl + Shift + Arrow Key: Select entire data range in a direction

• Ctrl + Home: Move to cell A1
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Q3. When do you use pivot table, vlookup, hlookup, xlookup?
Ans. 
Pivot table for summarizing data, vlookup for finding values in a table, hlookup for horizontal lookup, xlookup for advanced lookup.
• Pivot table is used to summarize and analyze large datasets.

• VLOOKUP is used to find a value in a table by row.

• HLOOKUP is used to find a value in a table by column.

• XLOOKUP is a more advanced version of VLOOKUP and HLOOKUP, allowing for more flexibility in searching for data.

• Example: Use piv...read more
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Q4. Questions from resume
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Q1. Print even and odd numbers using two threads simultaneously so it should print in sequence
Ans. 
Use two threads to print even and odd numbers in sequence
• Create two threads, one for printing even numbers and one for printing odd numbers

• Use synchronization mechanisms like mutex or semaphore to ensure numbers are printed in sequence

• Start both threads simultaneously and let them print numbers alternately
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Q1. Core java questions and project discussion
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Q1. Cycle in linked list and behavioral
Ans. 
Detecting cycle in a linked list and discussing behavioral aspects
• Explain how to use Floyd's Tortoise and Hare algorithm to detect a cycle in a linked list

• Discuss the importance of understanding memory management in linked lists to prevent cycles

• Explain the impact of cycles in linked lists on time complexity and space complexity of algorithms
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1.Sum numbers in linked list
2. Maximum sum subarray

Q1. Design and code hashmap.
Ans. 
Implement a hashmap data structure in code.
• Use an array to store key-value pairs

• Implement a hash function to map keys to indices in the array

• Handle collisions using techniques like chaining or open addressing
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Q2. Questions on kafka
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Q1. Design linked in
Ans. 
Design a platform similar to LinkedIn for professional networking.
• Create user profiles with work experience, education, skills, and endorsements.

• Allow users to connect with others, join groups, and follow companies.

• Include features like job postings, messaging, news feed, and recommendations.

• Implement algorithms for personalized content and job suggestions.

• Ensure data privacy and security measures are in place.
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Q1. Few DSA related questions
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Q2. Mid level SQL questions
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SQL, python, PySpark basic to mid level questions.

Q1. Basic project related questions
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Q2. Some prior experience questions
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Q1. Linked list implementation with second largest and second smallest
Ans. 
Implement a linked list with methods to find the second largest and second smallest elements.
• Create a linked list class with methods to insert elements, find second largest, and find second smallest.

• Traverse the linked list to find the largest and smallest elements, then find the second largest and second smallest.

• Handle edge cases such as empty list or lists with less than 2 elements.

• Consider using a priority queue to...read more
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Q2. Max Frequency Character in a string
Ans. 
Find the character with the highest frequency in a given string.
• Iterate through the string and count the frequency of each character using a hashmap.

• Track the character with the highest frequency as you iterate.

• Return the character with the highest frequency at the end.
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Q3. Longest common subsequence print
Ans. 
Find and print the longest common subsequence in an array of strings
• Use dynamic programming to find the longest common subsequence

• Iterate through the array of strings to find common characters

• Print the longest common subsequence found
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Q1. Solid design principles
Ans. 
Solid design principles are fundamental guidelines for designing software that is maintainable, scalable, and efficient.
• Follow the SOLID principles (Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion)

• Use design patterns like Factory, Singleton, Observer, etc. to solve common design problems

• Keep code modular, reusable, and easy to understand

• Separate concerns and avoid ti
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Q2. Snake and Ladder LLD
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Q3. Executor Service
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