American Express Software Engineer II Interview Questions and Answers

Q1. Wht is tuple and how it is dif from list
Ans. 
A tuple is an immutable collection of elements, while a list is a mutable collection in Python.
• Tuples are created using parentheses (), while lists are created using square brackets []

• Tuples are immutable, meaning their elements cannot be changed once defined

• Lists are mutable, allowing for elements to be added, removed, or modified

• Tuples are typically used for fixed collections of items, while lists are used for dynami
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Q1. Explain Project Architecture
Ans. 
Project architecture refers to the high-level structure of a software system, including components, relationships, and interactions.
• Project architecture defines how different components of a software system interact with each other.

• It includes the design decisions related to the organization of code, data, and resources.

• Common architectural patterns include MVC, microservices, and serverless.

• Architectural diagrams like...read more
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Q2. Springboot components
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Q3. Angular Lifecycle
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Q1. How do you define clean code?
Ans. 
Clean code is well-organized, easy to read, and maintainable code that follows best practices.
• Clean code is easy to read and understand by other developers.

• It follows consistent naming conventions for variables, functions, and classes.

• Clean code is well-organized with proper indentation and spacing.

• It avoids unnecessary complexity and duplication.

• Clean code is modular and follows the single responsibility principle.

• Exa...read more
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Q2. How to better test your code?
Ans. 
To better test your code, use a combination of unit tests, integration tests, regression tests, and automated testing.
• Write unit tests to test individual components or functions in isolation.

• Perform integration tests to test how different components work together.

• Implement regression tests to ensure that new code changes do not break existing functionality.

• Utilize automated testing tools to run tests quickly and effici...read more
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Q1. Questions related to the previour project.
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Q1. Questions related to skill. For PEGA its all concepts that we used in project
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Q1. Questions were shooted related to all the skills present in the resume.
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Q1. Compensation related to job. Why are want another job?
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Q2. Why you are suitable for this job? Why we need to hire you?
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Q1. Java 8 features and benefits
Ans. 
Java 8 introduced new features like lambda expressions, streams, and default methods, improving code readability and performance.
• Lambda expressions allow for more concise code and easier parallel programming.

• Streams provide a way to work with collections in a functional style, enabling easier processing of large data sets.

• Default methods allow interfaces to have method implementations, reducing the need for abstract cl...read more
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General apti questions

Work-life balance and career progression

Q1. Full Java deep knowledge including oops concepts then rest APIs then have some basic knowledge of microservices then spring boot all the things have mastery
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Q1. What is fast wrto performance?hashmap or treemap and why
Ans. 
HashMap is faster than TreeMap wrto performance due to its constant time complexity for most operations.
• HashMap has O(1) time complexity for most operations while TreeMap has O(log n) time complexity.

• HashMap is implemented using an array of buckets while TreeMap is implemented using a Red-Black Tree.

• HashMap is preferred for frequent read operations while TreeMap is preferred for frequent write operations.

• HashMap is uno...read more
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Q2. Can I write a try catch block inside a catch Block
Ans. 
Yes, it is possible to write a try catch block inside a catch block.
• This is called nested try-catch block.

• It is useful when we want to handle different types of exceptions in different ways.

• Example: try { //code } catch (ExceptionType1 e1) { try { //code } catch (ExceptionType2 e2) { //code } } }

• It is important to avoid excessive nesting as it can make the code difficult to read and maintain.
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Q3. Are exceptions can be written in a catch block seperated by commas,?
Ans. 
Yes, multiple exceptions can be caught in a single catch block separated by commas.
• Multiple exceptions can be caught in a single catch block separated by commas.

• This can be useful when handling different types of exceptions in a similar way.

• For example: catch (IOException | SQLException ex) { // handle exception }
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Q4. Hashmap internal working
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Q1. Why this and what all offers you are having It was a normal telephone call
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