Java Programming Quiz 2 – Flashcards

________ is the Java assignment operator.

Which statement imports the Scanner class?

Every letter in a Java keyword is in lowercase.

A variable must be declared before it can be assigned a value.

Which of the following are correct names for variables according to Java naming conventions? (Choose two.)

To improve readability and maintainability, you should declare ________ instead of using literal values such as 3.14159.

Which of the following are correct ways to declare variables? (Choose two.)

Which of the following expressions will yield 0.5? (Choose three.)

Java keywords can be used as identifiers.

Which of the following is a constant, according to Java naming conventions? (Choose two.)

Suppose a Scanner object is created as follows: Scanner input = new Scanner(System.in); What method do you use to read an int value?

Which of these data types requires the most amount of memory?

If you enter 1 2 3, when you run this program, what will be the output? import java.util.Scanner; public class Test1 { public static void main(String[ ] args) { Scanner input = new Scanner(System.in); System.out.print("Enter three numbers: "); double number1 = input.nextDouble(); double number2 = input.nextDouble(); double number3 = input.nextDouble(); // Compute average double average = (number1 + number2 + number3) / 3; // Display result System.out.println(average); } }

Which of the following is a valid identifier? (Choose two.)

To declare an int variable number with initial value 2, you write

To declare a constant MAX_LENGTH inside a method with value 99.98, you write

To assign a value 1 to variable x, you write

Suppose a Scanner object is created as follows: Scanner input = new Scanner(System.in); What method do you use to read a double value?

Analyze the following code: public class Test { public static void main(String[] args) { int i = k + 2; System.out.println(i); } }

What is the result of 45 / 4?