Amazon Web Services Senior Application Architect Interview Questions and Answers

Developed a web-based inventory management system for a retail company

• Utilized Java for backend development

• Implemented responsive design using HTML, CSS, and JavaScript

• Integrated barcode scanning functionality for efficient inventory tracking

I was responsible for providing technical support to end users and troubleshooting application issues within the team.

• Providing technical support to end users

• Troubleshooting application issues

• Collaborating with team members to resolve issues

• Documenting solutions and best practices

Check if a string is Palindrome or not.

• Create a function to compare the original string with its reverse

• Ignore spaces and punctuation when checking for palindrome

• Examples: 'racecar' is a palindrome, 'hello' is not

HashMap in Java is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.

• HashMap uses hashing to store and retrieve key-value pairs

• It uses an array of linked lists to handle collisions

• The key's hash code is used to determine the index in the array where the key-value pair is stored

• HashMap allows one null key and multiple null values

• Example: HashMap<String, Integer> map = new

String builder is not synchronized, faster but not thread-safe. String buffer is synchronized, slower but thread-safe.

• String builder is faster due to lack of synchronization, suitable for single-threaded environments.

• String buffer is slower due to synchronization, suitable for multi-threaded environments.

• Example: StringBuilder sb = new StringBuilder(); StringBuffer sbf = new StringBuffer();

I am passionate about developing innovative applications and believe in the mission of your company.

• Excited about the opportunity to work on cutting-edge technologies

• Aligned with the company's values and goals

• Seeking a challenging and dynamic work environment

• Impressed by the company's reputation and success stories