Question 1

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

Accepted Answer

A)   System.out.println(diskOut, "Calvin") ;
B)   PrintWriter.println("Calvin") ;
C)   DiskFile.println("Calvin") ;
D)   diskOut.println("Calvin") ;E) C) and D)
F) B) and D)

Question 2

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

Accepted Answer

A)   nested loops
B)   a way to terminate
C)   arithmetic operators
D)   nested decision strucuresE) None of the above
F) B) and C)

Question 3

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

Accepted Answer

A)   randomNumbers()  = new Random() ;
B)   Random myNumber = new Random() ;
C)   myNumber = new Random() ;
D)   Random = new randomNumbers() ;E) All of the above
F) B) and D) B

Question 4

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

Accepted Answer

A)   5
B)   4
C)   3
D)   1E) B) and D)
F) A) and C) A

Question 5

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

Accepted Answer

A)   object
B)   integer
C)   float
D)   classE) A) and B)
F) All of the above

Question 6

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

Accepted Answer

A)   count-controlled
B)   infinite
C)   conditional
D)   pretestE) None of the above
F) All of the above

Question 7

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

Accepted Answer

A) True 
 B)False  True

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A)   for
B)   while
C)   do-while
D)   posttestE) A) and B)
F) B) and D)

Question 10

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

Accepted Answer

A)   set the accumulator variable to an initial value, often zero
B)   set all variables to zero
C)   read all the values into main memory
D)   know exactly how many values there are to totalE) A) and D)
F) A) and B)

Question 11

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  500) 
{
System.out.print("Enter another number: ") ;
Number = keyboard.nextInt() ;
}

Accepted Answer

A)   Numbers less than 100 or greater than 500
B)   Numbers in the range 100 - 499
C)   Numbers in the range 100 - 500
D)   Impossible - the boolean condition can never be trueE) A) and B)
F) All of the above

Question 12

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

Accepted Answer

A)   0
B)   1
C)   5
D)   4E) A) and B)
F) B) and C)

Question 13

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

Accepted Answer

A)   x = 34, y = 9
B)   x = 25, y = 8
C)   x = 33, y = 8
D)   x = 33, y = 9E) All of the above
F) A) and C)

Question 14

Which of the following are pre-test loops?

Accepted Answer

A)   while, for, do-while
B)   while, do-while
C)   while, for
D)   for, do-whileE) B) and C)
F) None of the above

Question 15

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;

Accepted Answer

A)   25
B)   30
C)   50
D)   40E) C) and D)
F) A) and D)

Question 16

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

Accepted Answer

A)   accumulator
B)   sentinel
C)   summation
D)   integerE) All of the above
F) B) and C)

Question 17

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

Accepted Answer

A)   x = 12, y = 5
B)   x = 16, y = 4
C)   x = 17, y = 5
D)   x = 17, y = 4E) All of the above
F) A) and D)

Question 18

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

Accepted Answer

A)   nextDouble() 
B)   nextLong() 
C)   nextFloat() 
D)   nextInt(int n) E) B) and C)
F) A) and C)

Question 19

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

Accepted Answer

A)   counter variable
B)   loop control variable
C)   running total
D)   decrement variableE) B) and C)
F) All of the above

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 4: Loops and Files

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
B

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

Correct Answer
verified
A

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
True

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Which of the following are pre-test loops?

Correct Answer
verified

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;

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Exam 4: Loops and Files

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

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

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following are pre-test loops?

Correct AnswerverifiedShow Answer

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;

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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B

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A

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True

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