EPAM Systems Interview Questions, Process, and Tips

A situational based question

Q1. Print the count of words in a list
Ans. 
Count the number of words in a list of strings
• Iterate through the list of strings

• Split each string by spaces to get individual words

• Increment a counter for each word encountered
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Q2. Check if strings are anagrams
Ans. 
Check if strings are anagrams by sorting characters and comparing
• Sort characters in each string and compare if they are equal

• Use a hashmap to count characters in each string and compare the counts

• Example: 'listen' and 'silent' are anagrams
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Q1. Family details were asked
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Q2. Situational based questions were asked
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Q1. Scrum ceremonies and agile processes
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On financial solution creation

Q1. Architecture pattern used
Ans. 
The architecture pattern used is Model-View-Controller (MVC)
• Separates the application into three main components: Model (data), View (UI), and Controller (logic)

• Promotes code reusability, modularity, and easier maintenance

• Commonly used in web development frameworks like Ruby on Rails and Laravel
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Q1. Project mangement questions
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Q1. General questions based on resume
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Q1. Questions related to core java like hashmap working, etc. SpringBoot annotations.
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Q2. Coding question on hashmap and stream api.
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Q1. Design patterns scenario based questions.
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Q2. Min heap, max heap
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Q1. Explain difference between comparator vs comparable
Ans. 
Comparator is used to compare two objects for sorting while Comparable is implemented by a class to define natural ordering.
• Comparator is an interface in Java used to sort objects based on custom criteria

• Comparable is an interface in Java implemented by a class to define natural ordering

• Comparator can be used to sort objects of different classes, while Comparable is used for objects of the same class
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Q2. Selenium architecture
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Q1. Explain about Event Loop
Ans. 
Event Loop is a mechanism in JavaScript that allows asynchronous operations to be executed in a non-blocking way.
• Event Loop is responsible for handling the execution of code, callbacks, and I/O operations in JavaScript.

• It continuously checks the call stack for any pending tasks and executes them in a sequential manner.

• Event Loop ensures that the JavaScript engine is not blocked by long-running tasks, allowing for a smo...read more
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Q2. Explain about Promises in Javascript
Ans. 
Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.

• Example: const myPromise = new Promise((resolve, reject) => { ... });
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Coding questions given to clear min required score

Q1. Intermeditae level java spring boot questions
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