Advanced TestNG — quiz

Your Selenium suite has 80 tests. You set parallel="methods" and thread-count="4" in testng.xml. A test starts failing intermittently because a WebDriver instance initialized in @BeforeClass is shared across threads. What is the correct fix?

• Switch to parallel="tests" which guarantees no shared state between threads
• Move driver initialization to @BeforeMethod and use a ThreadLocal<WebDriver> so each thread gets its own driver instance
• Reduce thread-count to 1, which disables parallelism for methods
• Add synchronized to the @BeforeClass method to prevent concurrent initialization