Hierarchical data with parent & child relationships are very common, and Java collection does not have a Tree data structure, hence it is a popular interview question. Further questions include tree data structure processing using recursiion &
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800+ Java & Big Data Interview Questions
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Home › Java & Big Data Interview FAQs › 150+ Java coding interview Q&As › Archive for Coding – Data Structures
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01: Tree flattening example in Java with Generics
Q. Traverse the tree in depth and return a list of all passed nodes. It should handle different data types as Double, String, etc. The interface for the tree node...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs02: Tree structure – calculate average recursively & iteratively in Java
Q. Complete the following “TreeProcessingImpl” class ….. so that the unit tests shown below pass? Skeleton Code Unit Tests A. … Read more ›...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs03: Tree traversal algorithms in Java
Q1. What are the different binary tree traversal mechanisms? A1. Traversing a tree means visiting all the nodes of a tree in order. … Read more ›...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs03: Understanding Big O notations with Java
Q1. Have you seen job advertisements requiring Java candidates to work in real-time or high volume transaction processing systems? A1. If you are applying for such jobs, … Read more ›...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs04: Tree – Get root to leaf max sum in Java example
Q. Write code to traverse a tree and get the largest “root-to-leaf sum”? A “root-to-leaf sum” is a sum of the node values in a root-to-leaf path. … Read more...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs05: Is it a valid binary search tree (BST) ?
Q. Write code test if a given tree is a binary search tree (i.e. BST)? A. A binary search tree (BST) is a binary tree where each node satisfies the...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs06: Binary Tree – Sum Levels Java Example
Q. Write code to traverse a tree and return the sum of the values (Node.getValue()) of all nodes at the level N in the binary tree? … Read more ›...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs06: Binary Tree – Get root to leaf max sum in Java example
Q. Write code to traverse a binary tree and get the largest “root-to-leaf sum”? A “root-to-leaf sum” is a sum of the node values in a root-to-leaf path. … Read...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs07: Tree – Sum Levels Java example
Q. Write code to traverse a tree and return the sum of the values (Node.getValue()) of all nodes at the level N in the tree? A. … Read more ›...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs08: Part-1: Basic Java Tree structure interview questions and coding questions
Java does not have a Tree class but you can define one. In my 10+ years as a Java developer, I have rarely used a Tree structure, … Read more...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs09: Part 2: Java Tree structure interview questions and coding questions
In the previous post entitled Java Tree structure interview questions and coding questions — Part 1, we looked at a very simple Tree structure. In this example, … Read more...
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Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs09: When to use which Java data structure? and why?
List, Set, Map, and Queue(access the ends FIFO or LIFO) are the basic Java data structure interfaces for which there are different implementations to cater for different usage patterns. …...
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