CrackInterview

⁉️ How does Spring Boot prioritize multiple property sources (e.g., system properties, application.properties, environment variables)? A. System properties > Environment variables > application.properties B. application.properties > Environment variables > System properties C. Environment variables > System properties > application.properties D. System properties > application.properties > Environment variables

⁉️ What is the result of this JavaScript code? (() => { return 10 })(); A) 10 B) NaN C) undefined D) SyntaxError

⁉️ What does this Java code output? import java.util.concurrent.*; public class Main { public static void main(String[] args) throws Exception { ExecutorService executor = Executors.newSingleThreadExecutor(); Future<String> future = executor.submit(() -> { Thread.sleep(2000); return "Done"; }); System.out.println(future.get(1, TimeUnit.SECONDS)); } } A. Done B. TimeoutException C. ExecutionException D. Compilation Error

⁉️In Spring Boot, what happens if no application.properties or application.yml is found? A. The application fails to start. B. The application uses only system properties and environment variables. C. Spring Boot generates a default application.properties file. D. The application skips configuration altogether.

⁉️In JavaScript, Why can't arrow functions be used as constructors? A) They do not have a prototype property. B) They cannot return a value. C) They cannot have parameters. D) They cannot be called with new.

⁉️ What does this Java code print? import java.util.concurrent.atomic.AtomicInteger; public class Main {   public static void main(String[] args) {     AtomicInteger ai = new AtomicInteger(5);     System.out.println(ai.getAndUpdate(x -> x * 2));     System.out.println(ai);   } } A) 10 and 10 B) 5 and 10 C) 5 and 5 D) Compilation error

⁉️What does this Java code print? import java.util.concurrent.atomic.AtomicInteger; public class Main { public static void main(String[] args) { AtomicInteger count = new AtomicInteger(0); Runnable task = () -> { for (int i = 0; i < 5; i++) { count.getAndIncrement(); } }; Thread t1 = new Thread(task); Thread t2 = new Thread(task); t1.start(); t2.start(); try { t1.join(); t2.join(); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(count); } } A. 10 B. 5 C. A value between 5 and 10 D. Other?

⁉️ What issue exists in this React snippet? function App() { const [count, setCount] = useState(0); useEffect(() => { console.log(`Count is: ${count}`); }, []); return ( <button onClick={() => setCount(count + 1)}>Increment</button> ); } A) useEffect does not log updated count values. B) Causes an infinite loop. C) Throws a hooks error. D) No issue; works as expected

⁉️How does Spring Boot handle exceptions not explicitly caught in a REST controller? A. It returns a 500 Internal Server Error response. B. It uses the @ControllerAdvice class for global exception handling. C. It throws the exception back to the client without wrapping it. D. It logs the exception and returns a default error response in JSON format.