20+ Bacancy Technology Interview Questions and Answers

Testing is the process of evaluating a system or application to identify defects or errors before it is released to users.

• Testing helps ensure that the software meets the requirements and functions correctly.

• It helps in identifying and fixing bugs or issues early in the development process.

• Testing improves the quality of the software and increases customer satisfaction.

• It helps in reducing the risk of software failures and costly rework.

• Types of testing include unit testing, ...read more

Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.

• Types of life cycles: Singleton, Transient, Scoped

• Singleton: One instance per application

• Transient: New instance every time it is requested

• Scoped: One instance per request

Virtual function allows dynamic binding by enabling a function to be overridden in a derived class.

• Virtual functions are declared in a base class and can be overridden in a derived class.

• Dynamic binding is achieved by using a pointer or reference to the base class that can call the overridden function in the derived class.

• Virtual functions are identified by the keyword 'virtual' in the function declaration.

• Dynamic binding allows for polymorphism, where a single function call ...read more

Inheritance is a mechanism in OOP where a new class is derived from an existing class.

• The derived class inherits the properties and methods of the base class.

• It allows code reusability and saves time.

• Example: A class 'Animal' can be a base class and 'Dog' can be a derived class inheriting properties and methods from 'Animal'.

Regression testing is testing the entire application after a change, while retesting is testing a specific bug fix.

• Regression testing involves testing the entire application to ensure that new code changes have not adversely affected existing functionality.

• Retesting is testing a specific bug fix to ensure that the issue has been resolved.

• Regression testing is typically done after every code change, while retesting is done specifically for bug fixes.

• Example: After fixing a log...read more

SPI is faster, full-duplex, and uses separate data lines, while I2C is slower, half-duplex, and uses a shared data line.

• SPI is faster than I2C

• SPI is full-duplex, allowing data to be sent and received simultaneously

• SPI uses separate data lines for communication

• I2C is slower than SPI

• I2C is half-duplex, meaning data can only be sent or received at a time

• I2C uses a shared data line for communication

Smoke testing is a quick test to check if the basic functionalities of the software are working, while sanity testing is a more thorough test to check specific areas of the software after changes.

• Smoke testing is a high-level test to ensure the software build is stable and can proceed with further testing.

• Sanity testing is a focused test to check specific functionalities or areas of the software after changes.

• Smoke testing is usually done before sanity testing.

• Smoke testing i...read more

Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

• Inheritance allows for code reuse and promotes a hierarchical organization of code.

• The existing class is called the superclass or parent class, while the new class is called the subclass or child class.

• The subclass inherits all the properties and methods of the superclass, and can also add new properties and methods or override existing ones.

• For...read more

Use React table library like react-table or material-table for easy implementation of pagination, sorting, and searching functionality.

• Use a React table library like react-table or material-table for easy implementation

• Implement pagination by setting the number of rows per page and current page number

• Add sorting functionality by clicking on column headers to sort data in ascending or descending order

• Include a search bar to filter data based on user input

Encapsulation is the practice of keeping related data and functions together in a single unit.

• Encapsulation helps to hide the implementation details of an object from the outside world.

• It allows for better control over the data and functions, preventing unwanted access or modification.

• Examples of encapsulation include classes in object-oriented programming and modules in JavaScript.

Yes, basic SEO practices include keyword research, on-page optimization, link building, and content creation.

• Keyword research involves identifying relevant keywords for your website or content.

• On-page optimization includes optimizing meta tags, headings, and content for search engines.

• Link building involves acquiring backlinks from other websites to improve your site's authority.

• Content creation focuses on creating high-quality, relevant content that attracts and engages user...read more

Track team's work progress by setting clear goals, using project management tools, regular check-ins, and tracking key metrics.

• Set clear goals and milestones for the team to achieve

• Utilize project management tools like Trello, Asana, or Jira to track tasks and progress

• Have regular check-ins with team members to discuss progress and address any roadblocks

• Track key metrics such as completed tasks, hours worked, and project milestones

Types of testing include functional, non-functional, manual, automated, regression, performance, and security 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 QA engineers.

• Automated testing: Testing performed using automated tools and scripts.

• Regression testing: Testing to ensure that new code changes do ...read more

Abstraction is the process of simplifying complex systems by focusing on the essential details.

• Abstraction hides unnecessary details and exposes only the relevant information.

• It allows developers to work at a higher level of abstraction, increasing productivity and code reusability.

• For example, in object-oriented programming, classes are used to abstract away the implementation details and provide a simplified interface for interacting with objects.

OOPS concepts are fundamental principles in object-oriented programming that help in designing and implementing software solutions.

• Encapsulation: Bundling data and methods together in a class to hide implementation details.

• Inheritance: Creating new classes by inheriting properties and behaviors from existing classes.

• Polymorphism: Ability of objects to take on many forms and perform different actions based on the context.

• Abstraction: Simplifying complex systems by breaking the...read more

SOLID principles are design principles for writing maintainable and scalable software in .NET.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Subtypes must be substitutable for their base types.

• I - Interface Segregation Principle: Clients should not be forced to depend on interfaces they do not use.

• D - Depe...read more

Async is a keyword used to define a function that returns a promise. Promises are objects representing the eventual completion or failure of an asynchronous operation.

• Async functions always return a promise, while promises represent the eventual result of an asynchronous operation.

• Async functions make it easier to write asynchronous code in a synchronous manner, using the 'await' keyword to pause execution until the promise is resolved.

• Promises have a 'then' method that allow...read more

Fetch is a built-in web API in JavaScript for making HTTP requests, while Axios is a third-party library for the same purpose.

• Fetch is built into the browser, while Axios is a standalone library that needs to be installed separately.

• Axios has built-in support for handling request and response interceptors, while Fetch does not.

• Axios automatically transforms JSON data, while with Fetch you need to manually call the .json() method on the response.

• Fetch uses Promises for handlin...read more

API testing using Postman involves sending requests to an API and validating the response.

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

• Select the appropriate HTTP method (GET, POST, PUT, DELETE, etc.)

• Add headers, parameters, and body if necessary

• Send the request and check the response for correctness

• Use assertions to validate the response data

My area of interest lies in talent acquisition and employee development.

• I have a passion for finding the right candidates for the job.

• I enjoy creating training programs to help employees grow and succeed.

• I stay updated on industry trends and best practices in HR.

• I have experience in conducting interviews and assessments.

• I believe in fostering a positive work culture and employee engagement.

Implemented various employee wellness programs and training initiatives to improve team productivity and morale.

• Introduced weekly yoga sessions for stress relief

• Organized team-building workshops to enhance communication skills

• Implemented leadership training programs for career development

• Launched mental health awareness campaigns

• Introduced flexible work hours for better work-life balance