Morgan Stanley Java Software Developer Interview Questions, Process, and Tips

Q1. Spring cloud gateway
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Q2. JWT Token structure and details
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JWT token is a JSON web token used for authentication and contains three parts: header, payload, and signature.
• JWT token consists of three parts: header, payload, and signature.

• Header contains the type of token and the signing algorithm used.

• Payload contains claims about the user and additional data.

• Signature is used to verify that the sender of the JWT is who it says it is.

• JWT tokens are encoded and can be easily deco...read more
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Q3. Java 11 features
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Q4. Stream related problems
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Q1. Stringbuilder and string buffer diff
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Q2. Where we store the object of string
Ans. 
Objects of String are stored in the String Pool in Java.
• String objects are stored in the String Pool, a special memory area in Java heap memory.

• String literals are automatically stored in the String Pool.

• String objects created using the new keyword are not stored in the String Pool.

• String.intern() method can be used to store a String object in the String Pool.
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Q3. What is bean in springboot
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A bean in Spring Boot is a Java object that is instantiated, assembled, and managed by the Spring IoC container.
• Beans are defined in the Spring configuration file or using annotations like @Component, @Service, @Repository, etc.

• Beans are singleton by default but can be scoped as prototype, request, session, etc.

• Beans are injected into other beans using dependency injection.

• Example: @Component annotation is used to defi
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Q4. What is query parameters and path param
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Query parameters are used to pass data to a web server through the URL, while path parameters are part of the URL itself.
• Query parameters are key-value pairs added to the end of a URL after a '?'

• Path parameters are variables within the URL path itself, denoted by curly braces {}

• Example of query parameter: www.example.com/api/users?id=123

• Example of path parameter: www.example.com/api/users/{userId}
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Q5. Code snippet related to exception
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Q6. Diff between exception and error
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Exceptions are recoverable errors that can be handled in code, while errors are unrecoverable issues that usually result in program termination.
• Exceptions are checked at compile time, while errors are unchecked.

• Exceptions are subclasses of Throwable, while errors are subclasses of Error.

• Examples of exceptions include FileNotFoundException, NullPointerException, while examples of errors include OutOfMemoryError, StackOv
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MCQ test consisting of 70 mcqs in 75 minutes from aptitude english and cs fundamentals. If cleared next paper 2 coding qs medium level

Q1. Two sum leetcode problem
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Q2. What problems you faced in your project
Ans. 
I faced challenges with integrating third-party APIs and debugging complex logic.
• Difficulty in understanding and implementing third-party APIs

• Issues with data synchronization between different systems

• Troubleshooting complex logic errors

• Managing dependencies and version conflicts

• Time constraints affecting problem-solving
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Q1. How is transaction managed in microservices architecture?
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Transactions in microservices are managed using distributed transactions or compensating transactions.
• Distributed transactions involve multiple microservices coordinating with a transaction manager to ensure data consistency across services.

• Compensating transactions involve each microservice having a compensating action to rollback changes if a transaction fails.

• Saga pattern is commonly used in microservices to manage ...read more
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Q2. Questions about java garbage collection
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Q1. Functional interface
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Q2. Find if array of numbers, which are prime, using streams
Ans. 
Use streams to find prime numbers in an array
• Use Java streams to filter out non-prime numbers from the array

• Check if a number is prime by dividing it by all numbers less than its square root

• Create a method to check if a number is prime
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DP graphs strings it was good

Q1. Reverse a linkded list
Ans. 
Reverse a linked list by changing the direction of pointers
• Start with three pointers: current, previous, and next

• Iterate through the list, updating pointers to reverse the direction

• Return the new head of the reversed list
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Q2. Print fibonacci series
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The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.
• Start with two variables initialized to 0 and 1

• Loop through desired number of iterations, adding the previous two numbers to get the next number

• Print or store each number in the series
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Q1. What are checked and unchecked exceptions?
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Checked exceptions are exceptions that must be either caught or declared in the method signature, while unchecked exceptions do not need to be caught or declared.
• Checked exceptions are subclasses of Exception class, excluding RuntimeException and Error.

• Checked exceptions are checked at compile time, so the compiler forces the programmer to handle them.

• Unchecked exceptions are subclasses of RuntimeException and Error cl...read more
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Q2. What is the difference between Spring and SpringBoot?
Ans. 
Spring is a framework for building Java applications, while SpringBoot is a tool that simplifies the setup and configuration of Spring applications.
• Spring is a comprehensive framework that provides various modules for different functionalities like dependency injection, aspect-oriented programming, etc.

• SpringBoot is an opinionated tool that simplifies the setup and configuration of Spring applications by providing defa...read more
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Easy medium and hard questions

Q1. DBMS OS STACKS QUEUES
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Q2. NORMALISATION IN DBMS
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Normalization in DBMS is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down a database into smaller, more manageable tables and defining relationships between them.

• It helps in reducing data redundancy by storing data in a structured and organized manner.

• Normalization also helps in improving data integrity by ensuring that data is consistent ...read more
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Q3. OUTPUT QUESTION IN JAVASCRIPT
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Q1. GENERIC HR STUFF
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