Amazon Web Services Senior Application Architect Interview Questions and Answers

It was Easy to medium . overall good

It was Medium to tough level

Q1. What is fifo lifo
Ans. 
FIFO (First In, First Out) and LIFO (Last In, First Out) are inventory management methods.
• FIFO: Items that are added first are the first to be removed. Like a queue.

• LIFO: Items that are added last are the first to be removed. Like a stack.
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Q2. Whole data structure concepts
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Q1. What do you want to change in this country if you get a chance
Ans. 
I would focus on improving access to quality education for all citizens.
• Implementing policies to ensure equal opportunities for education

• Investing in infrastructure and resources for schools in underserved areas

• Providing scholarships and financial aid for students from low-income families

• Promoting vocational training programs to address skills gaps in the workforce
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Q2. I don't remember
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Q1. Mostly asked java 8 update and distinct number in given array and Multithreading
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Q2. 2 program based on java 8, array reverse
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Q1. About yourself and Recent project
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Q2. Why you are shifting
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Q1. What are the differences between a procedure and a function?
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Q2. Write a query to find 3rd highest salary from each department
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Q3. What is synonym.
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Q4. What are the indexes you used ? Diff between bitmap and btree index
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Q1. What is bussniess rule ?
Ans. 
A business rule is a specific guideline or constraint that dictates how a business operates or makes decisions.
• Business rules are typically defined by stakeholders or subject matter experts.

• They help ensure consistency, compliance, and efficiency in business processes.

• Examples include age restrictions for purchasing alcohol, pricing strategies, and approval processes for expenses.
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Q2. What is update set?
Ans. 
An update set is a group of changes that can be moved from one instance to another in ServiceNow.
• Update sets are used to transport customizations, such as new fields, tables, or scripts, between instances.

• They help in organizing changes and tracking what customizations are being moved.

• Update sets can be previewed, committed, and rolled back if needed.

• Example: Creating a new field in a development instance and moving it
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Q1. About splunk topics. Thry asked sbout alerts, reports snd dashboards
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Q2. Unix commands and shell scripting and few scenarios
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Q1. Package discussion and about the shift
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Q1. Oops related questions
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Q2. MVC related questions
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Q1. Managerial questions
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Q2. About expectations
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Q1. Internal working of Hashmap
Ans. 
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
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Q2. Difference between string builder and string buffer
Ans. 
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();
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Q1. Why would you like to join us
Ans. 
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
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Q2. Expected CTC and current CTC
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