Infosys Interview Questions, Process, and Tips

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Q1. Code explaining recursions
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Q2. Functions how does they work
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Q3. Projects and their explanation howdidtgey work
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Q1. SQL operationg systems
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Q2. Tools and their usages
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Q1. Olap oltp difference
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Q2. How many tables in project
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General Aptitude , Grammar MCQ and Essay Writing

Q1. Tell me about yourself?
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Q2. Which Language are you Familiar ?
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Q3. Basic Questions from oops and dbms
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Q4. Why did you choose Infosys ?
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Q5. Questions from my project
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Q1. How to create the IP sec tunnel?
Ans. 
To create an IPsec tunnel, configure the necessary parameters on both ends of the connection.
• Configure the IPsec parameters such as encryption algorithms, authentication methods, and key exchange protocols on both the source and destination devices.

• Establish a secure communication channel by setting up the IPsec tunnel between the two endpoints.

• Ensure that the IPsec tunnel is properly configured and tested for secure d...read more
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Q2. How to troubleshoot the IP sec tunnel?
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To troubleshoot an IPsec tunnel, check configurations, verify connectivity, monitor logs, and use packet capture tools.
• Check the IPsec configuration on both ends to ensure they match

• Verify that the tunnel endpoints can reach each other

• Monitor logs on both devices for any error messages related to the tunnel

• Use packet capture tools like Wireshark to analyze traffic going through the tunnel
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Q1. How ssl vpn it will be working for the remote location?
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SSL VPN allows remote users to securely access the network from any location.
• SSL VPN uses encryption to secure the connection between the remote user and the network.

• It authenticates users before granting access to resources.

• SSL VPN can be set up using a web browser or a client application.

• It provides a secure way for remote employees to access company resources.

• SSL VPN can be configured to restrict access based on use
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Q2. How to configure the IP sec tunnel for 3 different location and explain the traffic traffic flow and how it will be work?
Ans. 
Configuring IPsec tunnel for 3 different locations and explaining traffic flow
• Configure IPsec tunnel on routers/firewalls at each location

• Set up IPsec policies for encryption and authentication

• Define IPsec tunnel endpoints and establish secure communication

• Ensure proper routing between locations for traffic flow

• Monitor and troubleshoot the IPsec tunnel for any issues
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Q1. How to upgrade to the palaalto firewall and fortigate?
Ans. 
To upgrade to Palo Alto firewall and Fortigate, follow these steps: plan the upgrade, backup configurations, test the upgrade in a lab environment, schedule downtime, perform the upgrade, test functionality post-upgrade.
• Plan the upgrade by determining the current firewall configurations and requirements for the new firewalls.

• Backup configurations of the existing firewalls to ensure data safety in case of any issues dur...read more
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Q2. The both locations IP sec tunnel are down. How to troubleshoot the issue.
Ans. 
To troubleshoot both locations IPsec tunnel being down, check configurations, network connectivity, and security policies.
• Check the IPsec configurations on both ends to ensure they match

• Verify network connectivity between the two locations

• Check firewall and security policies to ensure they are not blocking the IPsec traffic

• Review logs on both ends for any error messages or indications of the issue

• Restart the IPsec serv
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Q1. What is functional predicate and its need
Ans. 
A functional predicate is a function that returns a boolean value based on input parameters.
• Functional predicates are commonly used in programming to filter or sort data based on specific criteria.

• They are often used in higher-order functions like filter, map, and reduce.

• For example, a functional predicate could be used to check if a number is even or odd.

• Another example could be a predicate that checks if a string con
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Q2. What is optional and would you implement it in code
Ans. 
Implementing logging functionality is optional in code
• Implementing logging can help in debugging and monitoring the application

• Use logging frameworks like Log4j or SLF4J to easily add logging to code

• Example: Adding log statements before and after critical operations
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Q3. What is delete, drop and truncate? Which deletes all data from table and can be rollbacked?
Ans. 
Delete, drop, and truncate are SQL commands used to remove data from a table. Truncate can't be rollbacked.
• DELETE command is used to remove specific rows from a table

• DROP command is used to remove an entire table from the database

• TRUNCATE command is used to remove all rows from a table

• DELETE can be rollbacked using a transaction, while TRUNCATE cannot be rollbacked
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Q4. How to print something on browser using springboot?
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To print something on browser using Spring Boot, you can create a controller method that returns a view or a response entity.
• Create a controller class with a method that returns a view or a response entity

• Use Thymeleaf or other template engine to render HTML views

• Return a response entity with the content type set to text/html for plain text output
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Q1. What development model is followed in your project?
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Q2. What are agile ceremonies?
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Agile ceremonies are regular meetings or events held within an agile framework to facilitate communication, collaboration, and alignment among team members.
• Sprint Planning: Meeting at the start of a sprint to plan the work to be done.

• Daily Stand-up: Short daily meeting for team members to discuss progress and plan for the day.

• Sprint Review: Meeting at the end of a sprint to review and demonstrate the completed work.

• Spr...read more
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Q3. Do you have experience with frontend and cloud technologies?
Ans. 
Yes, I have experience with frontend technologies such as HTML, CSS, and JavaScript, as well as cloud technologies like AWS and Azure.
• Proficient in HTML, CSS, and JavaScript for frontend development

• Experience with cloud technologies such as AWS and Azure

• Familiarity with frontend frameworks like React and Angular

• Knowledge of cloud services like EC2, S3, and Azure Functions
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Q1. Project related questions, architecture, exception handling, Kafka use case.
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Q2. Oops question functional interface, marker interface.
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Q3. Memory leaks and how to avoid the same.
Ans. 
Memory leaks occur when a program allocates memory but does not release it, leading to inefficient memory usage.
• Use tools like profilers to identify memory leaks in Java applications.

• Avoid creating unnecessary objects and ensure proper garbage collection.

• Avoid static references to objects that can prevent them from being garbage collected.

• Close resources like files, database connections, and streams after use to preven
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Q4. Multi threading question
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Q1. Pom related questions how many scope available.
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Q2. Agile related questions
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Q3. Comparable vs comparator
Ans. 
Comparable is an interface used for natural ordering, while Comparator is an interface used for custom ordering.
• Comparable is implemented by the class itself to define the natural ordering of objects.

• Comparator is implemented by a separate class to define custom ordering of objects.

• Example: String class implements Comparable interface for natural ordering, while Collections class uses Comparator for custom sorting.
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