Infosys Senior Associate Consultant Interview Questions, Process, and Tips

Q1. API Led connectivity explanation in Mulesoft
Ans. 
API Led connectivity in Mulesoft is an approach to connecting and exposing APIs in a reusable and scalable manner.
• API Led connectivity involves organizing APIs into layers based on their functionality such as experience, process, and system APIs.

• It promotes reusability, flexibility, and scalability by allowing different APIs to be easily connected and reused in various applications.

• For example, a company may have an AP...read more
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Q2. Error Handling way in Mule4
Ans. 
Error handling in Mule4 involves using Try scope, Error handler, and On Error Continue
• Use Try scope to encapsulate the code that might throw an error

• Use Error handler to catch and handle specific errors

• Use On Error Continue to continue processing even if an error occurs
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Q3. How to handle error in subflow.
Ans. 
Error handling in subflows is crucial for maintaining the flow of the main process.
• Use error handling nodes like Try/Catch or Error Boundary in the subflow.

• Log the error message or send it to a monitoring system for further analysis.

• Consider retrying the subflow or notifying the main process about the error.

• Implement fallback mechanisms to ensure the main process can continue despite errors.
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Q4. Batch Processing in mule 4
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Batch processing in Mule 4 allows for processing large amounts of data in chunks.
• Batch processing in Mule 4 is achieved using the Batch Job component.

• It allows for processing large amounts of data in chunks, improving performance and efficiency.

• You can configure batch jobs to read data from a variety of sources, process it, and then write the results to a target system.

• Batch processing in Mule 4 also supports error han...read more
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Q5. For Each Loop vs Batch processing diff
Ans. 
For Each Loop processes elements one by one, while Batch processing groups elements together for processing.
• For Each Loop is used to iterate over each element in a collection individually.

• Batch processing involves processing a group of elements together in a single operation.

• For Each Loop is more suitable for small collections, while Batch processing is efficient for large datasets.

• Example: For Each Loop can be used to...read more
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Q6. How to implement retry mechanism for external system connection.
Ans. 
Implement retry mechanism for external system connection
• Use a loop to attempt connection multiple times

• Include a delay between each retry to avoid overwhelming the external system

• Set a maximum number of retry attempts to prevent infinite loops

• Consider implementing exponential backoff for retries to gradually increase the time between attempts
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Q7. How to handle System API error handling in Experience API.
Ans. 
Handle System API errors in Experience API by implementing proper error handling techniques.
• Implement try-catch blocks to catch and handle exceptions thrown by System APIs.

• Use status codes and error messages to communicate errors to the user.

• Log detailed error information for troubleshooting purposes.

• Provide user-friendly error messages to guide users on how to resolve the issue.

• Consider implementing retry mechanisms f
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Q8. Can we use same API Id in two different applications.
Ans. 
No, API Id should be unique to avoid conflicts and ensure proper functioning of applications.
• API Id should be unique to avoid conflicts in data retrieval and processing.

• Using the same API Id in two different applications can lead to errors and unexpected behavior.

• Each application should have its own unique API Id to maintain clarity and organization.

• For example, Application A should have API Id '123' and Application B
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Q9. How to consume SOAP web services in mule and implement security header for WSDL.
Ans. 
To consume SOAP web services in Mule and implement security header for WSDL, you can use the MuleSoft Secure Configuration Properties.
• Use MuleSoft Secure Configuration Properties to configure security headers in the Mule flow.

• Add a security header to the SOAP request using the element in the Mule configuration file.

• Configure the security header properties such as username, password, encryption, etc.,...read more
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Q10. What is SLA Based policy, explanation
Ans. 
SLA Based policy is a service level agreement that defines the level of service a customer can expect from a provider.
• SLA Based policy outlines the agreed upon level of service between a service provider and a customer.

• It includes details such as response time, resolution time, availability, and performance metrics.

• Failure to meet the SLA can result in penalties or compensation for the customer.

• For example, an SLA may ...read more
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Q11. How to configure and manage mule application application log.
Ans. 
To configure and manage Mule application logs, you can use log4j configuration in the Mule project.
• Use log4j configuration file to define log levels, appenders, and log format.

• Add log4j configuration file to src/main/resources folder in Mule project.

• Configure log4j properties like log level, log file location, and log format.

• Use Mule properties to dynamically change log levels in different environments.
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Q12. How to handle error for Scatter Gatter component.
Ans. 
Handle errors in Scatter Gatter component by using try-catch blocks and displaying error messages to the user.
• Use try-catch blocks to catch errors in the Scatter Gatter component.

• Display informative error messages to the user when an error occurs.

• Handle different types of errors such as data loading errors or rendering errors.

• Implement error logging to track and troubleshoot errors in the Scatter Gatter component.
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Q13. Scenario: Call Database connector and get database response. we have input payload also. How to use input payload in next component after DB connector.
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Q14. Can we use resource type in trait in RAML
Ans. 
Yes, resource types can be used in traits in RAML.
• Resource types can be defined and reused in traits to avoid duplication of code.

• By using resource types in traits, you can define common characteristics and behaviors that can be applied to multiple resources.

• Example: defining a resource type for authentication and then using it in multiple resources.
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Q15. What is fragment
Ans. 
A fragment is a small piece or part of something larger.
• Fragments can refer to broken pieces of objects or materials.

• In programming, a fragment is a reusable portion of code that can be included in multiple parts of a program.

• In literature, a fragment can refer to an incomplete or unfinished work.

• Fragments can also be used in art to create a sense of incompleteness or ambiguity.
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Q1. Java 8a features
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Asked about technical programming questions

Q1. Asked about past experience
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Q1. Internal working of HashSet, HashMap vs HashTable, Tell the output for a code snippet based on Arraylist, what is an IoC container, questions on Spring boot annotations, Current project details
Ans. 
The question covers topics like internal working of HashSet, HashMap vs HashTable, IoC container, Spring boot annotations, and current project details.
• HashSet is implemented using a hash table, HashMap is implemented using a hash table with key-value pairs, and HashTable is a synchronized version of HashMap.

• ArrayList is a dynamic array that can grow or shrink in size, and the output of a code snippet depends on the spe...read more
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Q1. Questions on SDLC processes, Microservice Architecture and design patterns used, write code to sort Employee list based on a field using Lambda expression, Database related questions, question on session ...read more
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