American Express Customer Executive Interview Questions and Answers

Yes, the string class can be extended in most programming languages.

• Inheritance can be used to extend the functionality of the string class.

• By creating a new class that inherits from the string class, additional methods and properties can be added.

• Extending the string class allows for customization and adding specific functionality to strings.

• Example: In Python, the string class can be extended by creating a new class

Implicit objects in JSP are predefined objects that are available for use without any declaration or initialization.

• Implicit objects in JSP include request, response, session, application, out, config, pageContext, page, exception, and others.

• These objects provide access to various aspects of the JSP environment and can be used to perform common tasks.

• For example, the request object allows access to HTTP request parame...read more

A hash map is a data structure that uses a hash function to map keys to values.

• Hash map stores key-value pairs

• It uses a hash function to compute an index for each key

• Collisions can occur when two keys hash to the same index

• Hash maps provide fast access to values based on their keys

StringBuffer and StringBuilder are both used to manipulate strings, but StringBuffer is thread-safe while StringBuilder is not.

• StringBuffer is synchronized, making it safe for use in multi-threaded environments.

• StringBuilder is not synchronized, making it faster but not thread-safe.

• StringBuffer is preferred when multiple threads are involved, while StringBuilder is preferred for single-threaded scenarios.

• Both classes p...read more

MVC is a software architectural pattern that separates an application into three main components: Model, View, and Controller.

• Model represents the data and business logic of the application.

• View is responsible for displaying the user interface.

• Controller handles user input, updates the model, and interacts with the view.

• MVC promotes separation of concerns and modularity in software development.

• Example: In a web applica...read more

Annotations used in RESTful web services

• 1. @Path - Specifies the URI path for the resource

• 2. @GET - Specifies that the method handles HTTP GET requests

• 3. @POST - Specifies that the method handles HTTP POST requests

• 4. @PUT - Specifies that the method handles HTTP PUT requests

• 5. @DELETE - Specifies that the method handles HTTP DELETE requests

• 6. @PathParam - Binds the value of a URI template parameter to a method paramete...read more

I want to join Citi because of its global presence, strong reputation, and opportunities for growth.

• Citi is a global company with a presence in over 100 countries, which provides an opportunity to work with diverse teams and gain international exposure.

• Citi has a strong reputation in the financial industry, known for its expertise and innovative solutions.

• Citi offers excellent career development opportunities, includin...read more

I am interested in a career in banking because of the opportunities for growth, the dynamic nature of the industry, and my passion for financial analysis.

• Opportunities for growth: Banking offers a wide range of career paths and opportunities for advancement. I am excited about the potential to develop my skills and progress within the industry.

• Dynamic nature of the industry: Banking is constantly evolving, with new tec...read more

The Indian economy has experienced mixed performance in the past 2 years.

• GDP growth rate has fluctuated

• Demonetization and GST implementation impacted the economy

• Unemployment rate has been a concern

• Inflation has remained relatively low

• Foreign direct investment has increased

• Agricultural sector faced challenges due to weather conditions