Wipro Technical Lead Interview Questions, Process, and Tips

Configuring DNS sinkhole for malicious domains on Palo Alto

• Create a security policy to block traffic to malicious domains

• Configure DNS sinkhole profile with the list of malicious domains

• Enable DNS sinkhole in the security policy

• Monitor the logs for any blocked traffic

• Update the list of malicious domains regularly

To implement anti-malware profile, call EDL with domains and send to sinkhole IPs via security ACL.

• Create an anti-malware profile with appropriate settings

• Create an EDL with domains to be blocked

• Create a security ACL and call the anti-malware profile in it

• Add the EDL to the security ACL and send traffic to sinkhole IPs

• Regularly update the EDL with new domains

Singleton design pattern was used in the project.

• Singleton pattern ensures that only one instance of a class is created and provides a global point of access to it.

• It is useful when there is a need for a single instance of a class that can be accessed globally.

• Example: A Logger class that needs to be accessed from multiple parts of the project.

Adapter pattern converts the interface of a class into another interface that clients expect.

• Adapter pattern is used to make incompatible interfaces work together.

• It is used when we want to reuse an existing class that doesn't have the interface we need.

• It involves creating a wrapper class that translates the interface of one class into another interface.

• An example is using a USB to Ethernet adapter to connect a comput...read more

Legacy monolithic applications can be replaced with microservices by breaking down the application into smaller, independent services.

• Identify the different functionalities of the monolithic application

• Break down the application into smaller, independent services

• Use APIs to communicate between the services

• Implement containerization and orchestration for scalability and reliability

• Gradually migrate functionality to micr...read more

EC2 is a web service that provides resizable compute capacity in the cloud.

• EC2 stands for Elastic Compute Cloud

• It allows users to rent virtual computers on which to run their own applications

• EC2 instances can be easily scaled up or down based on demand

• To build and deploy on AWS, one can use services like AWS CodeDeploy, AWS CodePipeline, and AWS Elastic Beanstalk

S3 is a cloud storage service provided by AWS. IAM is used to manage access to AWS resources.

• S3 is an object storage service that allows you to store and retrieve data from anywhere on the web.

• S3 provides durability, availability, and scalability for your data.

• IAM is used to manage access to AWS resources by creating and managing users, groups, and roles.

• IAM allows you to control who can access your AWS resources and w

Finding an integer not present in a given array.

• Iterate through the array and mark the presence of each integer in a hash table.

• Then iterate through the hash table to find the missing integer.

• Alternatively, sort the array and iterate through to find the first missing integer.

Chaining comparing using java 8 for object

• Java 8 introduced the Comparator interface with default and static methods for chaining comparisons

• The thenComparing() method is used to chain multiple comparisons

• Example: Comparator.comparing(Object::getName).thenComparing(Object::getAge)

Hashing is a technique to map data to a fixed size array. Hash Map is a data structure that uses hashing to store key-value pairs.

• Hashing is used to quickly retrieve data from a large dataset

• Hash function maps data to a fixed size array index

• Collisions can occur when multiple data points map to the same index

• Hash Map uses key-value pairs to store and retrieve data

• Balanced tree is an alternative to Hash Map for efficien