J. C. Penney PQC Auditor Interview Questions and Answers

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

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
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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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Q1. Find top 3 students in a class
Ans. 
Identify the top 3 students based on their grades in a class.
• Calculate the average grade for each student

• Sort the students based on their average grades in descending order

• Select the top 3 students
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Guesstimate questions

Q1. Directors ask behavioural questions
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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. Questions around spring boot. Rotate and array k times. Merge two sorted lists.
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Q1. Flood fill algorithm, other problems and technical questions
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Q2. Flood fill algorithm Other rech questions
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Water bill management system
Flood fill algo