10+ Znifa Technologies Interview Questions and Answers

Emulator replicates both hardware and software of the original device, while simulator only replicates the software.

• Emulator replicates both hardware and software of the original device

• Simulator only replicates the software

• Emulator is slower but more accurate, simulator is faster but less accurate

• Examples: Android Emulator for testing mobile apps, Flight Simulator for pilot training

Method overloading is when multiple methods have the same name but different parameters, while method overriding is when a subclass provides a specific implementation of a method that is already provided by its superclass.

• Method overloading involves creating multiple methods in the same class with the same name but different parameters.

• Method overriding occurs when a subclass provides a specific implementation of a method that is already provided by its superclass.

• Method over...read more

APIs can be categorized into different types such as REST, SOAP, GraphQL, and RPC.

• RESTful APIs: Representational State Transfer APIs use standard HTTP methods like GET, POST, PUT, DELETE for communication.

• SOAP APIs: Simple Object Access Protocol APIs use XML for message exchange over a network.

• GraphQL APIs: Query language for APIs that allows clients to request only the data they need.

• RPC APIs: Remote Procedure Call APIs allow a program to execute code on a remote server.

Different types of testing include functional testing, non-functional testing, manual testing, automated testing, regression testing, and performance testing.

• Functional testing: Testing the functionality of the software against the requirements.

• Non-functional testing: Testing aspects like performance, usability, and security.

• Manual testing: Testing performed manually by testers.

• Automated testing: Testing performed using automation tools.

• Regression testing: Testing to ensure t...read more

Validating API through Postman involves sending requests, receiving responses, and verifying data.

• Create a new request in Postman and enter the API endpoint

• Add any required headers, parameters, or body data

• Send the request and check the response status code

• Verify the response body for expected data or values

• Use assertions in Postman to validate response data

• Save the request in a collection for future testing

Java program to print patterns using loops

• Use nested loops to print the desired pattern

• Patterns can be created using characters or numbers

• Patterns can be simple shapes or more complex designs

Java program to reverse a string using StringBuilder

• Create a StringBuilder object with the input string

• Use the reverse() method of StringBuilder to reverse the string

• Convert the reversed StringBuilder object back to a string using toString()

I am familiar with Jenkins, GitLab CI/CD, and CircleCI.

• Jenkins is a popular open-source CI/CD tool with a large plugin ecosystem.

• GitLab CI/CD is tightly integrated with GitLab for seamless automation.

• CircleCI is a cloud-based CI/CD tool known for its simplicity and scalability.

We have implemented Jira for reporting and tracking project progress.

• Implemented Jira for creating and tracking project tasks

• Utilized Jira's reporting features to generate progress reports

• Customized Jira dashboards for team visibility

Yes, I built a framework for my project to ensure consistency and efficiency in testing.

• Yes, I built a custom automation framework using Selenium and TestNG for web application testing.

• I also integrated the framework with Jenkins for continuous integration.

• The framework included reusable functions, page object model, and data-driven testing capabilities.

• Regular maintenance and updates were done to keep the framework up-to-date with the project requirements.

Yes, I have used docker images in previous projects for containerization.

• Used docker images to package applications and their dependencies

• Utilized docker-compose for managing multi-container applications

• Deployed docker images to production environments for scalability and consistency