Kangaro Industries Teacher Educator Interview Questions and Answers

2 coding problems.

One is on Hasmap

second one is on Tree

Q1. Pair programming Round
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Q2. One problem step by step solving with unit test cases maintaining time complexity and space complexity.
Ans. 
Step-by-step problem-solving with unit tests, focusing on time and space complexity.
• Identify the problem clearly, e.g., finding the maximum number in an array.

• Choose an efficient algorithm, e.g., O(n) time complexity for a linear search.

• Implement the solution in code, ensuring clarity and maintainability.

• Write unit tests to cover edge cases, e.g., empty array, single element.

• Analyze space complexity, ensuring minimal a...read more
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Q1. High level Design
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Q1. Techno - Managerial
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Q1. Normal discussion benefits and salary
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Q1. Write design for URL sortner
Ans. 
Design a URL shortener system
• Use a unique identifier for each long URL to generate a short URL

• Store the mapping of short URL to long URL in a database

• Implement a redirect mechanism to redirect short URLs to their corresponding long URLs

• Consider scalability and performance while designing the system
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Q2. Program to detect cycle on linked list
Ans. 
Use Floyd's Tortoise and Hare algorithm to detect cycle in a linked list.
• Initialize two pointers, slow and fast, at the head of the linked list.

• Move slow pointer by one step and fast pointer by two steps.

• If they meet at any point, there is a cycle in the linked list.
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Mostly dynamic programming and tree based programs

Q1. Coding Coordinate geometry problem
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Q2. Coding on trees
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Q1. HLD / LLD , Java technical questions
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Q2. Pair programming
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Q1. Asked about resume and then some questions on Linkedlist, Stack
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Q2. Java garbage collection
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Q3. What is Bean in Spring
Ans. 
A bean in Spring is a Java object that is instantiated, assembled, and managed by the Spring IoC container.
• Beans are defined in the Spring configuration file using XML or annotations.

• Beans are singleton by default but can be configured as prototype.

• Beans can have dependencies injected by the container.

• Example: @Component annotation in Spring creates a bean.

• Example:
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Q1. Binary search and tree
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Q2. Discussion on project
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Java-based coding, streams and lambda, design patterns

It was basically two leetcode Questions Mainly from array with some algorithm required to apply and other from LinkedList.

Q1. First the discussion was mainly on Projects you have worked on for first 20 minutes.
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Q2. Then was given to Design a chat application basically a High Level. Interviewer was friendly and prompt listener.
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Q1. Very Detailed Project Discussion and Scenario based Questions basically your achievements in detail.
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Q2. Then some Implementation questions related to designing and Java based and Kafka based.
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Q1. CTC Discussion and Expectations plus Notice period and other documents.
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Q1. Design principles for Low Level Architecture
Ans. 
Low level architecture design principles focus on optimizing performance, efficiency, and resource utilization.
• Optimize for performance by minimizing latency and maximizing throughput

• Efficiently utilize resources such as memory, CPU, and network bandwidth

• Design for scalability and flexibility to accommodate future growth

• Use modular and reusable components to promote maintainability and code reusability

• Consider security...read more
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Q2. Mvcc architecture
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Q3. Kafka Architecture
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