Wipro Technical Lead Interview Questions, Process, and Tips

Performance tuning involves optimizing software or hardware to improve its speed and efficiency.

• Identify bottlenecks in the system

• Optimize code and algorithms

• Use caching and indexing

• Upgrade hardware or infrastructure

• Monitor and analyze performance metrics

• Consider load testing and stress testing

• Continuously review and improve performance

I have worked on multiple automation frameworks including Selenium, Appium, and TestNG.

• I have experience in creating and maintaining automated test scripts using Selenium WebDriver for web applications.

• I have also worked with Appium for mobile automation testing.

• TestNG has been my preferred choice for test management and reporting.

• I have also integrated automation scripts with CI/CD pipelines using tools like Jenkins.

• I...read more

Achieve parallel testing in Selenium using Java

• Use TestNG framework to execute tests in parallel

• Create multiple instances of WebDriver

• Use ThreadLocal to maintain thread safety

• Use Selenium Grid to distribute tests across multiple machines

• Configure TestNG XML file to specify parallel execution mode

To make a thread safe object in Java, use synchronization or locks.

• Use synchronized keyword to ensure only one thread can access the object at a time.

• Use locks to provide more fine-grained control over synchronization.

• Use thread-safe data structures like ConcurrentHashMap or AtomicInteger.

• Avoid using static variables or mutable shared state.

• Consider using immutable objects or thread-local variables.

• Test the thread safe...read more

DataParameter is a TestNG annotation used to pass data to test methods.

• DataParameter is used to pass data to test methods in TestNG

• It is used in conjunction with DataProvider to provide test data

• DataParameter can be used to pass multiple parameters to a test method

• Example: @Test(dataProvider = "dp", dataProviderClass = TestData.class)

• Example: public void testMethod(@DataParameter("username") String username, @DataParam

Singleton pattern restricts the instantiation of a class to one object.

• Create a private constructor to restrict object creation.

• Create a static method to return the single instance of the class.

• Use lazy initialization to create the instance only when needed.

• Ensure thread safety by using synchronized keyword or double-checked locking.

• Commonly used in database connections, logging, and configuration settings.

Collections framework is a set of classes and interfaces that provide a way to store and manipulate groups of objects in Java.

• It includes interfaces like List, Set, and Map

• It provides implementations of these interfaces like ArrayList, HashSet, and HashMap

• It allows for easy manipulation and sorting of collections

• It is part of the Java Collections API

• Example: List names = new ArrayList<>();

• Example: Map

Database testcases are a set of steps to verify the functionality and performance of a database.

• Database testcases ensure data integrity and consistency.

• They test CRUD operations, data retrieval, and query performance.

• Testcases can be automated or manual, and should cover edge cases and error handling.

• Examples of database testcases include testing for duplicate records, testing for null values, and testing for data val

Positive test cases verify expected behavior while negative test cases verify unexpected behavior.

• Positive test cases test for expected behavior

• Negative test cases test for unexpected behavior

• Examples: Positive - login with correct credentials, Negative - login with incorrect credentials

To find an employee with no boss, search for employees whose boss ID is null or not in the employee list.

• Check the employee list for any null boss IDs.

• Check if any boss IDs are not present in the employee list.

• Use a SQL query or programming language to filter the employees with no boss.

• Consider the possibility of multiple employees having no boss.

• Check for any circular references in the boss-employee hierarchy.

To increase application performance, focus on coding optimization, utilizing core Java features, and effective team handling.

• Optimize code by reducing unnecessary loops, minimizing database calls, and using caching techniques.

• Utilize core Java features such as multithreading, concurrency, and memory management.

• Ensure effective team handling by setting clear goals, providing regular feedback, and promoting collaboration...read more