Amazon Web Services Engineer Trainee Interview Questions and Answers

Q1. Explain about past projects.
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Q2. Technology on which you worked.
Ans. 
I have worked on various technologies including Java, Python, AWS, and Docker.
• Developed RESTful APIs using Java and Spring framework

• Implemented machine learning models using Python and scikit-learn library

• Deployed applications on AWS using EC2, S3, and RDS

• Containerized applications using Docker for easy deployment and scaling
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Q3. C language basic but important concepts related to Data type, pointer, etc.
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Q4. Python knowledge check.
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Sort the arr, fetch element from array

Q1. Linklist search
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Q2. Sort in link List
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Sorting in a linked list involves rearranging the elements in ascending or descending order based on a certain criteria.
• Use a sorting algorithm like bubble sort, selection sort, or merge sort to rearrange the elements in the linked list.

• Traverse the linked list and compare each element with the next one to determine the order in which they should be sorted.

• Update the pointers of the nodes in the linked list to reflect ...read more
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Q1. General SOM and FEA questions Hypermesh related questions
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Basic aptitude on java application and framework

Q1. What is mutable type
Ans. 
A mutable type is a data type whose values can be changed after they are created.
• Mutable types include lists, dictionaries, and sets in Python.

• Changes to mutable objects affect all references to that object.

• Example: list1 = [1, 2, 3], list1[0] = 4 will change the value of list1 to [4, 2, 3].
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Q2. What is functional interface
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A functional interface is an interface that contains only one abstract method.
• Functional interfaces can have multiple default or static methods.

• Examples include Runnable, Callable, and ActionListener interfaces.

• Functional interfaces can be implemented using lambda expressions.
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Q3. Updates in java 17
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Java 17 introduces new features like sealed classes, pattern matching for switch statements, and more.
• Sealed classes restrict which classes can be subclasses

• Pattern matching for switch statements simplifies code by combining declaration and assignment

• New APIs like JEP 356: Enhanced Pseudo-Random Number Generators
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