Western Digital Senior Software Engineer Interview Questions and Answers

Graph algorithm questions

Q1. Networking graph sql
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3 hrs test with 50 test cases to run

Q1. Basic Trees and Project Quesions
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Q1. Normal HR questions and one technical question
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Trees, Arrays, DP, Graphs, Leetcode Questions

Q1. Personal Projects
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Q2. System design interview, HP Products
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Q1. Core Java and Spring boot questions
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Q2. Hibernate, Spring, Junit, Mockito and Micro service questions
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Q3. Difference between String and StringBuffer
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String is immutable while StringBuffer is mutable.
• StringBuffer is faster for concatenation operations.

• StringBuffer has methods to modify the string.

• StringBuffer is thread-safe while String is not.

• StringBuffer has a larger memory footprint than String.
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Q1. Internal Structure of hashmap and hashing algorithm
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Explanation of internal structure of hashmap and hashing algorithm
• Hashmap is a data structure that stores key-value pairs using a hash function

• Hashing algorithm converts the key into an index in the array

• Collisions can occur when two keys map to the same index

• Chaining and open addressing are two methods to handle collisions

• Load factor determines when to resize the hashmap
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Q2. Difference between predicate and supplier
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Predicate is a functional interface that takes an argument and returns a boolean value. Supplier is a functional interface that takes no argument and returns a value.
• Predicate is used for filtering or testing a condition on an object.

• Supplier is used for providing a value or generating a value.

• Predicate takes an argument and returns a boolean value based on the condition.

• Supplier takes no argument and returns a value.

• E...read more
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Q1. What is pep and why its important
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Q1. Cursor and refcursor
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Q1. Oracle database developer related questions
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Q1. Previous role related technical questions
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Q1. Same as round 1 from onsite team
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Q1. General HR questions
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