Software Developer II

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10+ Software Developer II Interview Questions and Answers

Updated 17 Feb 2025

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Q1. What all type of exceptions in Mule 4 & 3 and what is difference in both?

Ans.

Mule 3 and 4 have different types of exceptions.

  • Mule 3 has 4 types of exceptions: Messaging, Expression, Security, and Connector.

  • Mule 4 has 3 types of exceptions: Mule, Application, and System.

  • The main difference is that Mule 4 has a new type of exception called Mule, which is used for all Mule-specific errors.

Q2. What is scaling in Mule , if know then why and when we do different type of scaling

Ans.

Scaling in Mule refers to the ability to handle increased traffic and workload by adding more resources.

  • Scaling can be done horizontally by adding more instances of the application or vertically by increasing the resources of the existing instance.

  • Horizontal scaling is useful when the workload is distributed across multiple instances, while vertical scaling is useful when a single instance needs more resources.

  • Scaling can be done manually or automatically based on predefined ...read more

Q3. Dataweave functions ? How to write custom function?

Ans.

Dataweave functions and writing custom functions

  • Dataweave functions are built-in functions in MuleSoft's Dataweave language

  • Custom functions can be written using the 'fun' keyword and specifying input and output types

  • Functions can be defined in a separate module and imported into the main Dataweave script

  • Functions can also be defined inline within the Dataweave script

  • Examples of custom functions include string manipulation, date formatting, and mathematical operations

Q4. how two arrays represented as trees are identical trees

Ans.

Two arrays represented as trees are identical if they have the same structure and values at each node.

  • Check if the arrays have the same length.

  • Compare the root nodes of both trees.

  • Recursively compare the left and right subtrees of both trees.

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Q5. How to deploy mule apis? On Prim ? Cloudhub?

Ans.

Mule APIs can be deployed on both Prim and Cloudhub platforms.

  • For Prim deployment, create a deployment package and deploy it on the server.

  • For Cloudhub deployment, create an application in Anypoint Platform and deploy it on Cloudhub.

  • Both platforms support different deployment strategies like blue-green deployment, canary deployment, etc.

  • Prim deployment requires manual configuration of servers, while Cloudhub provides automatic scaling and load balancing.

  • Cloudhub also provides...read more

Q6. Design a trading system that works end-to-end with algos to process buy and sell orders quickly. (few open source APIs provided by hackathon organizers)

Ans.

Design a trading system with algos for quick buy and sell orders processing.

  • Utilize open source APIs for market data and order execution.

  • Implement algorithms for analyzing market trends and making trading decisions.

  • Include risk management features to prevent large losses.

  • Optimize system for low latency to ensure quick order processing.

  • Implement backtesting functionality to evaluate algorithm performance.

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Q7. Performance improvement techniques utilized in project

Ans.

Various techniques were used to improve performance including caching, optimizing database queries, and using asynchronous programming.

  • Caching was implemented to reduce the number of requests to the server.

  • Database queries were optimized by using indexes and reducing the number of joins.

  • Asynchronous programming was used to improve responsiveness and reduce blocking.

  • Code profiling was done to identify bottlenecks and optimize them.

  • Load testing was performed to identify perform...read more

Q8. How to use Java in dataweave?

Ans.

Java can be used in DataWeave by calling Java methods and classes from within DataWeave code.

  • Use the Java module to import Java classes and methods

  • Use the invoke method to call Java methods

  • Use the new keyword to create new Java objects

  • Example: Java::java.lang.String::valueOf(payload.age)

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Q9. Java performance management techniques

Ans.

Java performance management techniques involve optimizing code, memory usage, and resource allocation.

  • Use efficient data structures and algorithms to improve performance.

  • Optimize code by reducing unnecessary loops, avoiding excessive object creation, and minimizing memory usage.

  • Utilize profiling tools like JVisualVM or YourKit to identify performance bottlenecks.

  • Implement caching mechanisms to reduce redundant computations and database queries.

  • Consider using multithreading an...read more

Q10. Find local minima in an array in optimised way

Ans.

Find local minima in an array in an optimized way.

  • Iterate through the array and compare each element with its neighbors.

  • If an element is smaller than both its neighbors, it is a local minima.

  • Handle edge cases where the first and last elements have only one neighbor.

  • Optimize the algorithm by using binary search instead of linear search.

Q11. LLD design of order collection service

Ans.

LLD design of order collection service involves designing the detailed architecture of the service for collecting orders.

  • Define the components of the order collection service such as order processing, validation, storage, and retrieval.

  • Design the data flow between these components and how they interact with each other.

  • Consider scalability, fault tolerance, and performance optimization in the design.

  • Use appropriate design patterns and technologies to implement the service.

  • Incl...read more

Q12. Java program to do the validations.

Ans.

Java program to perform validations on input data.

  • Use regular expressions to validate input data.

  • Implement custom validation logic for specific requirements.

  • Utilize Java libraries like Apache Commons Validator for common validation tasks.

Q13. Do the cred operations

Ans.

The cred operations refer to the actions related to credentials in a software system.

  • Cred operations typically involve tasks such as creating, updating, deleting, and verifying user credentials.

  • Examples of cred operations include user registration, password reset, and authentication processes.

  • These operations are crucial for ensuring secure access to the software system and protecting user data.

Q14. substrings with unique characters count

Ans.

Count substrings with unique characters in an array of strings.

  • Iterate through each string in the array

  • For each string, iterate through all possible substrings and check for unique characters

  • Keep count of substrings with unique characters

Q15. Inverted array problem

Ans.

Inverted array problem involves reversing the order of elements in an array of strings.

  • Iterate through the array from both ends and swap the elements until reaching the middle.

  • Use a temporary variable to store the element being swapped.

  • Example: Input array ['apple', 'banana', 'cherry'] should be inverted to ['cherry', 'banana', 'apple'].

Q16. Design a Movie Booking System

Ans.

A movie booking system allows users to browse movies, select showtimes, choose seats, and make payments online.

  • Users can search for movies by title, genre, or release date.

  • Users can view showtimes, select seats, and add to cart.

  • Users can make payments securely using various payment methods.

  • Admin can manage movie listings, showtimes, and seating arrangements.

  • System should send confirmation emails and tickets to users.

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