Infoblox Software Engineer Intern Interview Questions and Answers

Coding on oops multiple choice questions

Q1. Find leaf node of binary tree
Ans. 
To find leaf node of binary tree, traverse the tree and check if node has no children.
• Traverse the binary tree using depth-first search or breadth-first search

• Check if a node has no left or right child, then it is a leaf node

• Repeat the process for all nodes until all leaf nodes are found
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Q2. How to get left view right view top view of binary tree
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To get left view, right view, and top view of a binary tree, perform level order traversal and keep track of the first node encountered at each level.
• Perform level order traversal of the binary tree

• Keep track of the first node encountered at each level for left view

• Keep track of the last node encountered at each level for right view

• For top view, use a map to store horizontal distance and node pairs
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Q3. Some of the puzzle questions
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Q1. Tell us about your experience.
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Q2. In english, give me a feedback you received lately.
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Q1. Brief explanation of SOLID principles
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Q2. Ref vs out arguments
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Q1. How pagination work in jpa
Ans. 
Pagination in JPA allows for retrieving a subset of results from a query by specifying a limit and offset.
• Use the setFirstResult() method to specify the starting index of the results to retrieve

• Use the setMaxResults() method to specify the maximum number of results to retrieve

• Combine setFirstResult() and setMaxResults() to implement pagination in JPA queries
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Q2. How to create restful api
Ans. 
To create a RESTful API, define endpoints, use HTTP methods, handle requests and responses, and follow REST principles.
• Define endpoints for different resources (e.g. /users, /products)

• Use HTTP methods like GET, POST, PUT, DELETE for CRUD operations

• Handle requests and responses in JSON format

• Follow REST principles like statelessness, uniform interface, and client-server architecture
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