Cognizant Product Specialist Technical Interview Questions and Answers

Q1. Tell me about your framework
Ans. 
My framework is a comprehensive set of tools, libraries, and best practices that I use to streamline the development process and ensure high-quality deliverables.
• Utilizes design patterns such as MVC for structuring code

• Includes libraries for common tasks like data manipulation and networking

• Emphasizes unit testing and continuous integration for code quality

• Integrates with popular tools like Git for version control

• Suppo...read more
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Q2. Type of selenium waits
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Types of Selenium waits include implicit, explicit, and fluent waits.
• Implicit wait: Waits for a certain amount of time before throwing a NoSuchElementException.

• Explicit wait: Waits for a certain condition to occur before proceeding further.

• Fluent wait: Waits for a condition to be true with a defined polling frequency.

• Example: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
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Q3. Xpath and CSS difference
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XPath is used to navigate through XML documents, while CSS is used to style HTML elements.
• XPath is more powerful and flexible for navigating XML documents

• CSS is more commonly used for styling HTML elements

• XPath uses path expressions to select nodes in an XML document

• CSS uses selectors to target specific HTML elements
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Q4. Coding to check list
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Q1. All questions about the current technology
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Q1. Salary discussion
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This was a assessment round where questions were asked from Aptitude ,DSA and Computer Science Fundamentals

The Group was divided into 10 people in each group and there was a common topic -"Is AI based Decision Making-Boon and Bane" and everyone was given 1 minute to speak on.

Q1. Questions from Resume were asked, Skills Projects(Which Libraries Tech Stacks you used) and Past Internship experience (What was the work , did you worked in any team what Tech Stacks you used) . What were...read more
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Q1. Java micro services hibernate jpa angular
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Q1. Java spring boot spring batch docker kubernetes
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Q1. What and why IOC Container in spring
Ans. 
IOC Container is a core feature of Spring Framework that manages the dependencies between objects.
• IOC stands for Inversion of Control

• It is used to achieve loose coupling between objects

• It allows objects to be created and wired together by an external framework

• It reduces the amount of code needed for configuration and maintenance

• Examples of IOC Containers in Spring are ApplicationContext and BeanFactory
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Q2. Why we use @Value in spring boot
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We use @Value in Spring Boot to inject values from properties files or environment variables.
• Allows for external configuration of application properties

• Values can be injected from properties files or environment variables

• Can be used to inject values into fields, constructors, or methods

• Example: @Value("${my.property}") private String myProperty;
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Q3. Difference between SQL and Non-SQL database
Ans. 
SQL databases are relational and use structured data, while NoSQL databases are non-relational and use unstructured data.
• SQL databases use tables with predefined schema, while NoSQL databases use documents, key-value pairs, or graphs.

• SQL databases are better for complex queries and data analysis, while NoSQL databases are better for scalability and flexibility.

• Examples of SQL databases include MySQL, Oracle, and Postgr...read more
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Q4. Give real time scenario where have you used abstract class and interface
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Abstract classes and interfaces are used to achieve abstraction and provide a blueprint for classes to implement.
• Used abstract class to create a base class for different types of vehicles, with common properties and methods.

• Used interface to define a contract for different payment methods, with each method implementing its own logic.

• Abstract classes are used when we want to provide a default implementation for some met...read more
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Q5. How did you handle authentication and authorization in project
Ans. 
Authentication and authorization were handled using a combination of technologies and protocols.
• Used OAuth 2.0 for authentication

• Implemented role-based access control for authorization

• Stored user credentials securely using bcrypt hashing algorithm

• Used JSON Web Tokens (JWT) for session management

• Implemented two-factor authentication for sensitive operations
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Q6. How will you encrypt customer information including SSN and others
Ans. 
Customer information will be encrypted using industry-standard encryption algorithms and stored securely.
• Use industry-standard encryption algorithms such as AES or RSA

• Ensure that encryption keys are securely stored and managed

• Implement secure storage mechanisms such as hashing and salting

• Regularly review and update encryption protocols to ensure they remain secure
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Q7. Why Serialization used
Ans. 
Serialization is used to convert complex data structures into a format that can be easily transmitted or stored.
• Serialization allows data to be sent over a network or saved to a file.

• It enables objects to be stored in a database or memory.

• Serialization is used in web services, messaging systems, and distributed computing.

• Examples include JSON, XML, and binary formats like Protocol Buffers and Apache Avro.
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Q8. Do you have any experience with Jenkins and Cloud Deployement
Ans. 
Yes, I have experience with Jenkins and Cloud Deployment.
• I have used Jenkins for continuous integration and continuous deployment.

• I have experience with setting up Jenkins pipelines for automated deployment.

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

• I have used tools like Ansible and Terraform for infrastructure automation.

• I have experience with containerization using Docker and Ku...read more
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Q9. Have you used Logging mechanism
Ans. 
Yes, logging is an essential part of software development.
• Logging helps in debugging and troubleshooting issues.

• It provides a record of events and actions taken by the system.

• It helps in monitoring system performance and identifying bottlenecks.

• Examples of logging mechanisms include log4j, syslog, and ELK stack.
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