Java Lab Mastery Quiz

What is the correct way to declare a variable to store an integer value in Java?

• int 1x = 10;

• int x = 10;

• integer x = 10;

• Int x = 10;

Which of the following data types would be most appropriate for storing a person's name in Java?

• String

• char

• int

• boolean

What does the following conditional statement check? `if (x > 10 && x < 20)`

• If x is greater than 10 or less than 20

• If x is greater than 10 and less than 20

• If x is less than 10 and greater than 20

• If x is either greater than 10 or 20

Which loop structure should you use when you know in advance how many times you want to execute a block of code?

• for loop

• while loop

• do-while loop

• All of the above

How do you call a method named `calculateSum` in Java?

• calculateSum();

• call calculateSum;

• execute calculateSum();

• run calculateSum();

Which of the following is the correct way to declare an array of integers in Java?

• int[] nums;

• int nums[];

• array nums[int];

• Both A and B are correct

How do you access the first element of an array named `arr`?

• arr[0];

• arr[1];

• arr.first();

• arr.get(0);

In Object-Oriented Programming, what is a class?

• A specific instance of an object

• A template or blueprint from which objects are created

• A method that performs a specific task

• A variable that stores data

Which of the following is NOT a principle of Object-Oriented Programming?

• Encapsulation

• Inheritance

• Polymorphism

• Multiprocessing

What is the output of the following code snippet? ```java int i = 1; while (i < 4) { System.out.println(i); i++; } ```

• 1 2 3

• 1 2 3 4

• 0 1 2 3

• 1 2