Java Programming Test 1

Which of the following is a valid variable declaration in Java?

Which of the following is a valid method declaration in Java?

Why are Strings immutable in Java?

Which of the following is a valid array declaration in Java?

Which of the following is a checked exception in Java?

Which of the following is the root interface of the Java Collections Framework?

What is the main purpose of Generics in Java?

What is the main purpose of lambda expressions in Java?

What is the main advantage of using Streams in Java?

Which of the following is a correct way to create a thread in Java?

Which of the following is a primitive data type in Java?

What will be the output?

int add(int a, int b) {
    return a + b;
}
System.out.println(add(3, 4));

Which of the following creates a new String object in the heap?

What will be the default values of an int array in Java?

What will be the output?

try {
    int x = 5 / 0;
    System.out.println("Try Block");
} catch(ArithmeticException e) {
    System.out.println("Catch Block");
}

Which statement about `List` is correct?

Which of the following correctly defines a generic class?

Which is the correct syntax for a lambda expression that takes two integers a and b and returns their sum?

Which of the following is a correct way to create a stream from a list?

What happens if you call the run() method directly instead of start() on a thread?