JPMorgan Chase & Co. Software Development Engineer Intern Interview Questions and Answers

API round to build rest API

Q1. Problems with mongo DB
Ans. 
Common problems with MongoDB include performance issues, data consistency concerns, and lack of transactions support.
• Performance issues due to lack of proper indexing or inefficient queries

• Data consistency concerns due to eventual consistency model

• Lack of transactions support can lead to data integrity issues
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Q2. Express jS app coding
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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. Pagination in SQL
Ans. 
Pagination in SQL allows for displaying a subset of query results at a time.
• Use LIMIT and OFFSET clauses in SQL queries to implement pagination.

• LIMIT specifies the maximum number of rows to return.

• OFFSET specifies the number of rows to skip before starting to return rows.
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Q2. OOPS concepts.. SOILD design principles
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Q3. Thread vs task in multiprocessing.. explain with examples
Ans. 
Threads and tasks are both used in multiprocessing, but have different characteristics and use cases.
• Threads are lightweight processes within a single process, sharing memory space. They are managed by the operating system.

• Tasks are units of work that can be executed asynchronously. They are typically managed by a task scheduler.

• Threads are suitable for parallel processing and improving performance, while tasks are use...read more
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Q4. ViewBag vs Tempdata in MVC
Ans. 
ViewBag is used to pass data from controller to view, while TempData is used to pass data between controller actions.
• ViewBag is a dynamic property that allows you to pass data from controller to view

• TempData is a dictionary object that allows you to pass data between controller actions

• ViewBag is not type-safe and requires typecasting, while TempData is type-safe

• ViewBag data is lost if redirection occurs, while TempData
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Q5. Abstract vs Interface
Ans. 
Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.
• Abstract classes can have constructors, fields, and non-abstract methods.

• Interfaces can only have abstract methods and constants.

• A class can implement multiple interfaces but can only inherit from one abstract class.
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Logical,quants,coding

Q1. Java,sql,testing,sdlc
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Q2. What is method overriding?
Ans. 
Method overriding is a feature in object-oriented programming where a subclass provides a specific implementation of a method that is already provided by its parent class.
• In method overriding, the method in the subclass has the same name, return type, and parameters as the method in the parent class.

• The purpose of method overriding is to provide a specific implementation of a method in the subclass that is different fr...read more
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Q3. What is exception handling in java?
Ans. 
Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.
• Exceptions are objects that represent errors or unexpected events during program execution.

• Java provides try, catch, and finally blocks to handle exceptions.

• try block contains the code that may throw an exception, catch block handles the exception, and finally block is executed regardless of an exception.

• Example: try { // cod...read more
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Q1. Normal questions
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Q2. Why you want to join our company?
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Q1. RestAPIs and Webservices
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Q2. Microservices and Spring boot
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90 minutes
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Q1. What is data structure ?
Ans. 
Data structure is a way of organizing and storing data in a computer so that it can be accessed and used efficiently.
• Data structures are used to manage large amounts of data efficiently.

• They provide a way to organize data in a way that makes it easy to access and manipulate.

• Examples of data structures include arrays, linked lists, stacks, queues, trees, and graphs.
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Q2. What is linked list?
Ans. 
A linked list is a linear data structure where each element is a separate object with a pointer to the next element.
• Consists of nodes that contain data and a pointer to the next node

• Can be singly or doubly linked

• Used for dynamic memory allocation, implementing stacks and queues

• Example: Singly linked list - 1 -> 2 -> 3 -> null

• Example: Doubly linked list - null <- 1 <-> 2 <-> 3 -> null
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Q1. Tell me about yourself
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Q2. Tell me about your project
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