American Express Interview Questions, Process, and Tips

Many Mcq,s.Similar to cat exam

Ml case study . Eg loan default prediction

Basic reasoning, aptitude, English

Q1. Who is ceo of your company
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Q2. Who founded your company
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Q1. Huw much increased salary
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Q2. Why want to join us
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It was a take home OA

Build a chess board using react

Q1. Difference between query and path param in spring boot
Ans. 
Query param is used to pass parameters in the URL query string, while path param is used to define parameters in the URL path itself.
• Query param is specified after the '?' in the URL, like '?param=value'

• Path param is specified in the URL path itself, like '/{param}'

• Query params are optional and can be used for filtering or sorting data

• Path params are used to define variables in the URL path, like IDs or names
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Q2. Difference between array and array list
Ans. 
Arrays have fixed size, while ArrayLists can dynamically resize. ArrayLists are part of Java Collections framework.
• Arrays have a fixed size, while ArrayLists can dynamically resize.

• Arrays can hold primitive data types and objects, while ArrayLists can only hold objects.

• Arrays use square brackets [] for declaration, while ArrayLists use angle brackets <>.

• Arrays are faster than ArrayLists for accessing elements directly ...read more
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Q3. Difference between abstract and interface
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructors, fields, and methods, while interface cannot have any of these.

• A class can extend only one abstract class, but can implement multiple interfaces.

• Abstract classes are used to provide a common base for subclasses, while interfaces are used to define a contract for classes to ...read more
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IT Java questions and also K8 question related to DevOps.

Q1. Related to Android and resume
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Q2. 1 easy leetcode problem was given.
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This round included technical questions related to Android + 1 machine coding problem.