10+ JPMorgan Chase & Co. Full Stack Developer Interview Questions and Answers

Clustered index determines the physical order of data in a table, while non-clustered index has a separate structure.

• Clustered index determines the physical order of data in a table

• Non-clustered index has a separate structure that includes a copy of the indexed columns and a pointer to the actual data

• A table can have only one clustered index, but multiple non-clustered indexes

• Clustered index is faster for retrieving large ranges of data, while non-clustered index is faster fo...read more

Git pull combines git fetch and git merge, while git fetch only downloads new data from a remote repository.

• Git pull is used to update the local branch with the latest changes from the remote repository.

• Git fetch only downloads new data from the remote repository, but does not integrate it into the local branch.

• Git pull is a combination of git fetch and git merge commands.

• Git fetch is useful to see what changes have been made in the remote repository before merging them into ...read more

Different methods of session management in Servlet

• Cookies

• URL Rewriting

• Hidden Form Fields

• Session Tracking API

• HTTP Session

Optimize website assets loading by minimizing file sizes, leveraging caching, and using asynchronous loading.

• Minimize file sizes by compressing images, minifying CSS and JavaScript files

• Leverage caching by setting appropriate cache headers and using a content delivery network (CDN)

• Use asynchronous loading techniques such as lazy loading, deferred loading, and async/defer attributes

• Combine and bundle multiple files to reduce the number of requests

• Optimize the order of loading ...read more

New tags in Media Elements in HTML5 include <audio> and <video>.

• <audio> tag for audio content

• <video> tag for video content

• Attributes like controls, autoplay, loop, etc. can be used with these tags

Spring Boot is a framework that simplifies the development of Java applications by providing default configurations and dependencies.

• Spring Boot eliminates the need for manual configuration by providing sensible defaults.

• It uses an embedded server, such as Tomcat or Jetty, to run the application.

• Spring Boot automatically configures the application based on the dependencies added to the project.

• It promotes convention over configuration, reducing boilerplate code.

• Spring Boot su...read more

CORS in MVC is Cross-Origin Resource Sharing, a mechanism that allows restricted resources on a web page to be requested from another domain.

• CORS is a security feature implemented in web browsers to prevent cross-origin requests by default.

• It works by adding specific HTTP headers to the server's response, indicating which origins are allowed to access the resources.

• In MVC, CORS can be configured using the 'EnableCors' attribute on controllers or by configuring it in the 'Web....read more

Web services offer advantages such as interoperability, scalability, reusability, and platform independence.

• Interoperability: Web services allow different applications to communicate and share data regardless of the programming languages or platforms they are built on.

• Scalability: Web services can handle a large number of requests and can be easily scaled up or down to meet changing demands.

• Reusability: Web services promote code reuse as they can be accessed by multiple appli...read more

A Java 8 program to iterate a Stream using the forEach method.

• Create a Stream object from a collection or array

• Use the forEach method to perform an action on each element of the Stream

• The action can be a lambda expression or a method reference

Dependency Injection is a design pattern where the dependencies of a class are provided externally rather than being created within the class itself.

• Dependency Injection helps in achieving loose coupling between classes.

• It allows for easier testing and maintenance of code.

• In Spring Boot, dependencies are injected using annotations like @Autowired.

• Example: In a Spring Boot application, if a class requires a database connection, the connection object can be injected into the cl...read more

Java 8 streams are a sequence of elements that can be processed in parallel or sequentially.

• Streams provide a functional programming approach to process collections in Java.

• They allow for concise and expressive code.

• Streams can be used to filter, map, reduce, and perform other operations on data.

• Example: List numbers = Arrays.asList(1, 2, 3, 4, 5); numbers.stream().filter(n -> n % 2 == 0).forEach(System.out::println);

• This example filters even numbers from the list and prints ...read more

SQL injection is a web security vulnerability that allows an attacker to manipulate a database query to execute unauthorized actions.

• SQL injection occurs when user-supplied data is not properly validated or sanitized before being used in an SQL query.

• Attackers can exploit this vulnerability to bypass authentication, retrieve sensitive data, modify or delete data, or even execute arbitrary commands.

• To prevent SQL injection, use parameterized queries or prepared statements, inp...read more

MVC components include Model, View, and Controller. Model represents data and business logic, View displays the data, and Controller handles user input and updates the Model and View.

• Model: Represents data and business logic

• View: Displays the data to the user

• Controller: Handles user input and updates the Model and View

The @RestController annotation in Spring Boot is used to mark a class as a RESTful controller.

• It combines the @Controller and @ResponseBody annotations.

• It eliminates the need for annotating each method with @ResponseBody.

• It automatically serializes the return value of the methods into JSON/XML response.

• It is commonly used to build RESTful web services in Spring Boot.