American Express
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I applied via Referral and was interviewed in May 2024. There were 2 interview rounds.
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I applied via Naukri.com and was interviewed in Aug 2024. There was 1 interview round.
Concatenate in SQL is done using the CONCAT function or the + operator.
Use the CONCAT function to concatenate strings in SQL, for example: SELECT CONCAT(first_name, ' ', last_name) AS full_name FROM employees;
Alternatively, you can use the + operator to concatenate strings, for example: SELECT first_name + ' ' + last_name AS full_name FROM employees;
American Express interview questions for popular designations
Optimizing SQL Joins involves using proper indexing, limiting the result set, and avoiding unnecessary joins.
Use indexes on columns involved in join conditions to improve performance
Limit the result set by using WHERE clause to filter out unnecessary rows before joining
Avoid unnecessary joins by only joining the tables that are needed for the query
Optimizing performance involves setting clear goals, providing feedback, offering training and development opportunities, and fostering a positive work environment.
Set clear goals and expectations for employees
Provide regular feedback and recognition for good performance
Offer training and development opportunities to help employees improve their skills
Create a positive work environment that promotes collaboration and c...
Get interview-ready with Top American Express Interview Questions
2 medium dsa que - one is of binary search, one is from graph
OOPs principles are the fundamental concepts of object-oriented programming that help in designing and implementing software solutions.
Encapsulation: Bundling data and methods that operate on the data into a single unit (class).
Inheritance: Allowing a class to inherit properties and behavior from another class.
Polymorphism: The ability of different classes to be treated as instances of a common superclass.
Abstraction: ...
OS concepts refer to fundamental principles and components of operating systems.
Process management - handling processes, scheduling, and resource allocation
Memory management - managing memory allocation, virtual memory, and paging
File system - organizing and accessing files on storage devices
Device management - controlling and communicating with hardware devices
Security and protection - ensuring system and data securit...
I applied via campus placement at Indian Institute of Technology (IIT), Guwahati and was interviewed in Jul 2024. There was 1 interview round.
I was interviewed in Jan 2025.
I was interviewed in May 2024.
Java 8 introduced new features for working with threads, such as CompletableFuture and parallel streams.
Java 8 introduced CompletableFuture class for asynchronous programming.
Parallel streams in Java 8 allow for easy parallelization of operations on collections.
New methods like `join()` and `thenApply()` were added to the Thread class in Java 8.
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The duration of American Express interview process can vary, but typically it takes about less than 2 weeks to complete.
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