Exam 4: Loops and Files

How many times will the following do-while loop be executed? int x = 11; Do { X += 20; } while (x <= 100);

Which of the following statements will create an object from the Random class?

When you open a file with the PrintWriter class, the class can potentially throw an IOException.

The variable used to keep a running total in a loop is called a(n) __________.

A loop that repeats a specific number of times is known as a(n) __________ loop.

Which of the following are pre-test loops?

What will be the value of x after the following statements are executed? int x = 10; For (int y = 5; y < 20; y +=5) X += y;

What will be the values of x and y as a result of the following code? int x = 25, y = 8; X += y++;

Given the following statement, which statement will write the string "Calvin" to the file DiskFile.txt? PrintWriter diskOut = new PrintWriter("DiskFile.txt");

Before entering a loop to compute a running total, the program should first

Select all that apply. Which method of the Random class will return a random number within the range of 0.0 and 1.0?

A random number, created as an object of the Random class, is always a(n) __________.

The variable that controls the number of times a loop iterates is known as a(n) __________.

In a for loop, the control variable cannot be initialized to a constant value and tested against a constant value.

In all but very rare cases, loops must contain, within themselves

The while loop is always the best choice in situations where the exact number of iterations is known.

The __________ loop is ideal in situations where the exact number of iterations is known.

How many times will the following do-while loop be executed? int x = 11; Do { X += 20; } while (x > 100);

What will be the values of x aand y after the following code is executed? int x = 12, y = 5; X += y--;

In the following code, what values could be read into number to terminate the while loop? Scanner keyboard = new Scanner(System.in); System.out.print("Enter a number: "); Int number = keyboard.nextInt(); While (number < 100 && number > 500) { System.out.print("Enter another number: "); Number = keyboard.nextInt(); }