TCS Interview Questions and Answers

There is no such thing as waperclass in Java.

• The term 'waperclass' is not a valid Java keyword or class name.

• It is possible that the interviewer made a mistake or was testing the candidate's ability to handle unexpected questions.

• As a Java developer, it is important to be familiar with the language's syntax and keywords.

Error is a serious issue that cannot be handled at runtime, while exception is a runtime issue that can be handled.

• Errors are caused by the environment in which the application is running, while exceptions are caused by the application code.

• Errors cannot be caught or handled, while exceptions can be caught and handled using try-catch blocks.

• Examples of errors include OutOfMemoryError and StackOverflowError, while examples of exceptions include NullPointerException and ArrayIn...read more

MySQL supports four types of joins: INNER, LEFT, RIGHT, and FULL OUTER.

• INNER JOIN returns only the matching rows from both tables.

• LEFT JOIN returns all rows from the left table and matching rows from the right table.

• RIGHT JOIN returns all rows from the right table and matching rows from the left table.

• FULL OUTER JOIN returns all rows from both tables, with NULL values in the columns where there is no match.

• JOIN and INNER JOIN are equivalent.

• LEFT OUTER JOIN and LEFT JOIN are e...read more

Hooks are functions that let you use state and other React features in functional components. Performance optimization methods include memoization, useCallback, and useMemo.

• Use useMemo to memoize expensive calculations and prevent unnecessary re-renders.

• Use useCallback to memoize functions and prevent unnecessary re-creations.

• Avoid unnecessary re-renders by optimizing component updates with shouldComponentUpdate or React.memo.

• Consider using React Profiler to identify performa...read more

Redux is a popular state management library for JavaScript applications.

• Redux is commonly used with React to manage the state of an application.

• It follows a unidirectional data flow, where actions are dispatched to update the state.

• Reducers are pure functions that specify how the state should change in response to actions.

• Selectors can be used to efficiently extract specific pieces of state from the store.

• Middleware can be used to add additional functionality to Redux, such a...read more

Yes, I am ready for rotational shifts.

• I have previous experience working in rotational shifts.

• I am adaptable and can easily adjust my schedule to accommodate rotational shifts.

• I understand the importance of maintaining work-life balance even with rotational shifts.

• I am committed to meeting the demands of the job regardless of the shift schedule.

Learn how to order shoes online with this step-by-step guide.

• Visit the online shoe store's website

• Browse through the available shoes and select the desired pair

• Choose the size and color of the shoe

• Add the shoe to your cart

• Proceed to checkout and enter your shipping and payment information

• Review your order and confirm the purchase

• Wait for the shoe to be delivered to your doorstep