10+ Interview Questions and Answers

Use Selenium WebDriver to automate launching an ecomm website, searching for a product, performing pagination, and finding a particular product.

• Use Selenium WebDriver to automate browser actions

• Navigate to the ecomm website URL

• Locate the search bar and enter the particular product name

• Handle pagination by clicking on next page buttons or using page numbers

• Identify the particular product by its unique identifier or attributes

Bias-variance tradeoff is a key concept in tree-based algorithms, balancing model complexity and generalization ability.

• Bias-variance tradeoff refers to the tradeoff between bias (underfitting) and variance (overfitting) in machine learning models.

• Decision trees have high variance and low bias, while ensemble methods like Random Forest have lower variance and higher bias.

• Regularization techniques like pruning can help reduce variance in decision trees.

• Increasing the depth of ...read more

I am familiar with a wide range of technologies including programming languages, databases, cloud services, and development tools.

• Programming languages (e.g. Java, Python, C++)

• Databases (e.g. MySQL, MongoDB, Oracle)

• Cloud services (e.g. AWS, Azure, Google Cloud)

• Development tools (e.g. Git, Jenkins, Docker)

Time series methods involve analyzing data points collected at regular intervals over time to identify patterns and trends.

• Time series analysis involves studying the past behavior of a variable to forecast its future values.

• Common methods include moving averages, exponential smoothing, and autoregressive integrated moving average (ARIMA) models.

• Time series data can be used in various fields such as finance, economics, and weather forecasting.

HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.

• HashMap uses hashing to map keys to their corresponding values, allowing for fast retrieval.

• It stores key-value pairs in buckets based on the hash code of the key.

• If two keys have the same hash code, they are stored in the same bucket and a linked list is used to handle collisions.

• Example: HashMap map = new HashMap<>(); map.put("apple", 5); int value = map.get("ap...read more

Microservices are small, independent services that work together to form a larger application.

• Decentralized architecture

• Loosely coupled services

• Independent deployment

• Resilience

• Scalability

• Flexibility

• Composability

• Autonomy

• Continuous delivery

• Domain-driven design

• API-based communication

• Containerization

Page object model is a design pattern used in test automation to create an object repository for web UI elements.

• Separates test scripts from web elements

• Improves code reusability and maintainability

• Enhances test readability and reduces duplication

• Each web page is represented as a class

Cypress is a modern testing tool with built-in features, while Selenium is a widely-used open-source tool with a larger community.

• Cypress is known for its fast test execution and easy setup compared to Selenium.

• Selenium supports multiple programming languages, while Cypress uses JavaScript.

• Cypress has a built-in dashboard for easier test management, whereas Selenium requires additional tools for reporting.

• Cypress has automatic waiting for elements to appear, while Selenium re...read more