Polariz Interview Questions and Answers

Create Amazon Cart APIs in Java for Rest API

• Use Spring Boot framework for creating Rest APIs

• Implement CRUD operations for managing cart items

• Secure APIs using authentication and authorization mechanisms

• Handle error responses and exceptions gracefully

• Test APIs using tools like Postman or JUnit

Java 1.8 introduced improvements in memory management with features like Metaspace and G1 garbage collector.

• Metaspace replaces the permanent generation (PermGen) for class metadata storage.

• G1 garbage collector is designed for better performance and predictability by dividing the heap into regions.

• These improvements help in reducing memory leaks and optimizing garbage collection.

• Example: Use of Metaspace allows for dynamic memory allocation for class metadata, avoiding PermGen...read more

I will provide a detailed overview of my project, including its objectives, features, technologies used, and the overall architecture.

• Outline the project objectives and goals

• Describe the features and functionalities of the project

• Explain the technologies and tools used in the project

• Discuss the overall architecture and design of the project

Reverse words in a string using Java program.

• Split the string into an array of words using split() method

• Iterate through the array in reverse order and append each word to a new string

• Return the reversed string

Find duplicates in an array of strings and sort them.

• Iterate through the array and use a HashMap to keep track of duplicate strings.

• After finding duplicates, sort the array using a sorting algorithm like quicksort or mergesort.

• Return the sorted array with duplicates removed.