Decorators are often used for logging, access control, memoization, and other cross-cutting concerns. Without context managers, resource leaks in long-running pipelines cause connection pool exhaustion. Retry, logging, and timing decorators are common in production ETL code. For large data, vectorised pandas/numpy operations beat all three.
This list of 100+ Selenium Interview questions help you to crack your interview. Once you become confident include your automation skills in your resume and if possible showcase your automation skills to your managers. Learn Selenium online and practice it until you feel confident. Usually, certifications are provided by companies that have developed a proprietary tool like QTP, AWS, Salesforce, etc., Selenium is an open-source software testing https://uvik.io/ tool. Here are some video tutorials which contain real-time selenium interview questions.
For candidates applying to Citi, the Karat interview is usually the first technical hurdle for software engineering roles. You’ve put in the work, you know your stuff, and now it’s just time to show them what you can do. If it’s a security or privacy risk for our users, I’d suggest a safer alternative. You’ll be asked to weigh trade-offs, manage your time, and show that you understand the business impact of the technical decisions you make every day. It speeds up “reading” data, but it can slightly slow down “writing” data because the index has to be updated too. Instead of the database checking every single row (a full table scan), it looks at the index to find exactly where the data is.
Selenium 2.0 streamlined creating automated tests for web applications by combining the original Selenium project with the WebDriver project. Selenese is the set of commands used in Selenium IDE to create and execute automated test cases. Automated Testing is the process of using software tools and scripts to automatically execute test cases, validate results, and perform repetitive testing tasks.
Explain what metaclasses are and provide a practical use case.
The server stores that key and ensures it only processes the operation once. You include a client-generated idempotency key in a header or payload. Companies ask this question because handling big files safely is key for robust API clients. Companies ask this question because GraphQL is common now, and they need you to handle its quirks correctly.
- Here, candidates should share a specific example from their experience, detailing the issue, their debugging process, and the solution they implemented.
- Decorators are a powerful tool in Python and can be used in a variety of scenarios to enhance the behavior of functions or classes.
- Spring Cloud Stream and Kafka provide the same pattern across service boundaries.
- Yes, Playwright allows you to mock geolocation by setting coordinates in the browser context.
- A singly linked list is a linear data structure in which the last node points to null and each node contains data and a reference to the node after it.
Q6. What are Playwright’s recommended locator strategies?
Reshaping provides a new view on the same data, so it’s memory efficient as the data is not duplicated. Since data scientists come from a variety of backgrounds, including software development or more pure statistics, the level of coding ability expected in an interview will differ. Python is commonly used in data science for its simplicity and the large number of helpful libraries available, like NumPy and Pandas. Show how you would create a new instance of this model in the Django shell. If the position you’re interviewing for is full-stack, be sure to brush up on your front skills, like HTML and CSS, as well.