Virtusa Consulting Services Technical Lead Interview Questions and Answers

SOA focuses on large, monolithic services while Microservices are small, independent services.

• SOA is a centralized architecture with shared services, while Microservices are decentralized with each service having its own database.

• SOA is typically implemented using ESB (Enterprise Service Bus), while Microservices communicate via lightweight protocols like HTTP or messaging queues.

• SOA is more suitable for large enterpri...read more

Yes

• LiveData is lifecycle aware and can be used to observe changes in data.

• ViewModel provides a way to store and manage UI-related data across configuration changes.

• ViewModel can hold LiveData objects to provide data to the UI.

• LiveData and ViewModel work together to ensure data consistency and prevent memory leaks.

The ViewModel survives configuration changes by being retained by the system.

• ViewModels are designed to survive configuration changes like screen rotations or language changes.

• When an activity is destroyed and recreated, the ViewModel is not destroyed and retains its data.

• The ViewModel is associated with the activity's lifecycle and is retained until the activity is finished.

• The retained ViewModel instance can be acces...read more

MVP offers better separation of concerns and easier unit testing compared to MVC.

• MVP separates the presentation layer from the business logic, making it easier to maintain and modify the codebase.

• MVP allows for easier unit testing as the presenter can be tested independently from the view.

• MVP provides better decoupling between components, enabling easier code reuse and scalability.

• MVP promotes a clear separation of con...read more

SSL pinning is a security technique that ensures a client only communicates with a server using a pre-defined public key.

• SSL pinning involves hardcoding the server's public key in the client's code or configuration.

• During the SSL handshake, the client checks if the server's public key matches the pinned key.

• If the keys match, the connection is established; otherwise, it is rejected.

• Pinning prevents man-in-the-middle at

Data security can be achieved through encryption, access controls, backups, and regular security audits.

• Encrypt sensitive data using strong encryption algorithms.

• Implement access controls to restrict unauthorized access to the data.

• Regularly backup the data to prevent data loss.

• Conduct regular security audits to identify and fix vulnerabilities.

• Use secure protocols and communication channels for data transfer.

• Implement...read more

Encryption keys should be securely stored in a separate key management system.

• Encryption keys should not be stored alongside the encrypted data.

• Use a dedicated key management system (KMS) to store and manage encryption keys.

• Implement strong access controls and authentication mechanisms for the KMS.

• Consider using hardware security modules (HSMs) for added security.

• Regularly rotate encryption keys to minimize the impact

A cartridge is a container holding a consumable material, such as ink or toner, used in printers or electronic devices.

• Cartridges are commonly used in printers to hold ink or toner for printing documents.

• They can also be used in electronic devices like gaming consoles to hold game data or memory.

• Cartridges are easily replaceable and come in various sizes and types depending on the device they are used in.

Laserjet printers use laser technology to print documents.

• Laser technology is used to create an image on a drum which is then transferred to paper

• Toner is used to create the image on the drum

• Common brands include HP LaserJet, Canon imageCLASS, and Brother HL-L2320D

An inkjet printer is a type of printer that sprays tiny droplets of ink onto paper to create text and images.

• Uses liquid ink cartridges

• Produces high-quality color prints

• Commonly used for home and office printing

• Can be used for printing photos

Going all-in on a printer means investing heavily in a high-quality printer setup.

• Investing in top-of-the-line printer hardware and accessories

• Opting for professional-grade printing software

• Committing to regular maintenance and upgrades

• Utilizing advanced printing techniques like color calibration and high-resolution printing

• Ensuring proper training for users to maximize printer capabilities

Inkjet printers use liquid ink sprayed through tiny nozzles onto paper to create images or text.

• Inkjet printers use liquid ink cartridges to create images or text on paper

• The ink is sprayed onto the paper through tiny nozzles in the print head

• Inkjet printers are commonly used for home or small office printing tasks

It seems like the question is not clear or may contain a typo.

• Ask for clarification on the question to ensure understanding.

• Request the interviewer to provide more context or rephrase the question.

• Avoid making assumptions and seek clarity before responding.

A cartridge is a small container holding a specific type of material, such as ink or ammunition, designed to be easily inserted into a larger device.

• Cartridges are commonly used in printers to hold ink for printing documents.

• Ammunition cartridges are used in firearms to hold bullets and gunpowder for firing.

• Video game consoles use cartridges to store and play games.

Inkjet cartridges differ in terms of compatibility, capacity, quality, and price.

• Compatibility with specific printer models

• Capacity of ink (standard, high yield, XL)

• Quality of ink (original vs. remanufactured)

• Price range based on brand and features

Different types of laser jet printers use various technologies to print documents.

• Different laser jet printers use different types of laser technology such as LED, solid-state, and gas lasers.

• Some laser jet printers use toner cartridges while others use liquid ink.

• Laser jet printers can vary in print speed, resolution, and connectivity options.

• Examples include HP LaserJet Pro M15w (LED technology), Brother HL-L2395DW (...read more

Working in lane port involves coordinating with team members to ensure smooth workflow and timely completion of tasks.

• Communicate effectively with team members to assign tasks and track progress

• Prioritize tasks based on deadlines and importance

• Collaborate with other departments to gather necessary information or resources

• Regularly review and adjust project timelines to meet goals

• Provide support and guidance to team mem

IP addresses are used to uniquely identify devices on a network.

• Used for identifying devices on a network

• Helps in routing data packets to the correct destination

• Can be static or dynamic depending on the network configuration