Cognizant Technical Lead Interview Questions, Process, and Tips

OSI layers refer to the seven layers of networking protocols that define how data is transmitted over a network.

• The seven OSI layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has its own specific functions and protocols that help in the transmission of data.

• Examples of protocols at different OSI layers include Ethernet at the Data Link layer, IP at the Network layer...read more

Interfaces are used for multiple inheritance and loose coupling, while abstract classes are used for code reuse and common functionality.

• Use interfaces when you want to define a contract that multiple classes can implement.

• Use abstract classes when you want to provide a base implementation for derived classes.

• Interfaces promote loose coupling and allow for easy swapping of implementations.

• Abstract classes allow for cod...read more

Design patterns are reusable solutions to common problems in software design.

• Design patterns provide proven solutions to recurring design problems.

• They help in creating flexible, maintainable, and scalable software.

• Design patterns can be categorized into three types: creational, structural, and behavioral.

• Examples of design patterns include Singleton, Factory Method, Observer, and Strategy.

SOLID principles are a set of design principles that help in creating maintainable and scalable software.

• SOLID stands for Single Responsibility Principle, Open-Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle.

• These principles guide developers to write code that is modular, flexible, and easy to understand and maintain.

• For example, the Single Responsibi...read more

I have learned various technologies in my previous organization.

• I have experience in working with Java, Python, and C++ programming languages.

• I have worked with various frameworks such as Spring, Hibernate, and Django.

• I have experience in working with databases like MySQL, Oracle, and MongoDB.

• I have worked with cloud platforms like AWS and Azure.

• I have experience in working with DevOps tools like Jenkins, Docker, and K

I am an experienced Tech Lead with a strong background in software development and team management.

• Over 10 years of experience in leading software development teams

• Proficient in various programming languages such as Java, C++, and Python

• Expertise in Agile methodologies and project management

• Proven track record of delivering high-quality software solutions on time and within budget

• Strong communication and leadership ski...read more

Patching is the process of applying updates or fixes to software or systems to address vulnerabilities or improve functionality.

• Patching involves applying updates or fixes to software or systems.

• It is done to address vulnerabilities, security issues, or bugs.

• Patches can be released by software vendors or developers.

• Patching can be done manually or automatically.

• Examples of patching include installing operating system u...read more