10+ Software Developer II Interview Questions and Answers

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.

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

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

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.

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.

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)

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

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.

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

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.

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

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'].

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.