Exam 4: Loops and Files

The while loop has two important parts: (1) a boolean expression that is tested for a true or false value, and (2) a statement or block of statements that is repeated as long as the expression is true.

What will be the value of x after the following code is executed? int x = 10, y = 20; While (y < 100) { X += y; }

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

What will be the value of x after the following code is executed? int x = 10; While (x < 100); { X += 10; }

This is a sum of numbers that accumulates with each iteration of a loop.

Assume that inputFile references a Scanner object that was used to open a file. Which of the following while loops shows the correct way to read data from the file until the end of the file is reached?

Which of the following are pre-test loops?

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

This type of loop is ideal in situations where the exact number of iterations is known.

Which of the following will open a file named MyFile.txt and allow you to read data from it?

In all but rare cases, loops must contain within themselves

____________ is the process of inspecting data given to the program by the user and determining if it is valid.

This variable controls the number of times that the loop iterates.

What will be the value of x after the following code is executed? int x = 10; While (x < 100) { X += 10; }

You can use the PrintWriter class to open a file for writing and write data to it.

What will be printed after the following code is executed? for (int number = 5; number <= 15; number +=3) System.out.print(number + ", ");

What will be the value of x after the following code is executed? int x = 10; Do { X *= 20; } While (x < 5);