HCLTech Technical Lead Interview Questions and Answers

A filter is a function or process that selectively allows certain data to pass through while blocking others.

• Filters are commonly used in programming to process collections, such as arrays or lists.

• In JavaScript, the `filter()` method creates a new array with elements that pass a test: e.g., `array.filter(num => num > 10)`.

• In data processing, filters can be used to clean datasets by removing outliers or irre...read more

Middleware is software that connects different applications or services, enabling them to communicate and manage data exchange.

• Acts as a bridge between different software applications.

• Facilitates communication and data management in distributed systems.

• Examples include message brokers (e.g., RabbitMQ), API gateways, and database middleware.

• Enhances scalability and flexibility by decoupling services.

• Commonly used i...read more

Selenium is a powerful framework for automating web applications, primarily used with Java for testing purposes.

• Selenium supports multiple programming languages, including Java, Python, and C#.

• It allows for browser automation, enabling tests to simulate user interactions.

• Selenium WebDriver is the core component that interacts with web browsers.

• Example: Using WebDriver to open a browser and navigate to a URL: 'WebD...read more

The Page Object Model is a design pattern for creating object-oriented representations of web pages in automated testing.

• Encapsulates page elements and actions in a class, promoting reusability.

• Each page of the application has a corresponding Page Object class.

• Example: A LoginPage class with methods like enterUsername() and clickLogin().

• Improves maintainability by separating test logic from page structure.

• Facilita...read more

Migrating SQL Database to Cosmos DB involves schema mapping, data transformation, and leveraging Cosmos DB features.

• Assess the existing SQL schema and identify data types and relationships.

• Map SQL data types to Cosmos DB types (e.g., INT to Number, VARCHAR to String).

• Use Azure Data Factory or custom scripts for data extraction and transformation.

• Consider partitioning strategies in Cosmos DB for scalability and per...read more

Azure API Management (APIM) is a cloud service for managing APIs, enabling secure access, monitoring, and analytics.

• Provides a unified interface for managing APIs across different environments.

• Enables security features like authentication, authorization, and rate limiting.

• Supports API versioning and transformation, allowing seamless updates.

• Offers analytics and monitoring tools to track API usage and performance.

• I...read more

Integrate Azure Logic Apps with PowerShell to automate script execution.

• Create a Logic App in Azure Portal to define the workflow.

• Use the 'Run PowerShell Script' action to execute the script.

• Authenticate with Azure credentials to allow script execution.

• Example: Use a HTTP trigger to start the Logic App and run a script that retrieves Azure resources.

To print a string in reverse, we can use various methods like loops, recursion, or built-in functions in programming languages.

• Using a loop: Iterate through the string from the end to the beginning.

• Example: For 'hello', loop from index 4 to 0 to get 'olleh'.

• Using recursion: Define a function that calls itself with a substring.

• Example: reverse('hello') returns 'o' + reverse('hell') until base case.

• Using built-in fu...read more