Question 1

Assuming that inputFile references a Scanner object that was used to open a file, which of the following statements will read an int from the file?

Accepted Answer

A)  int number = inputFile.nextInt(); 
B)  int number = inputFile.next(); 
C)  int number = inputFile.readInt(); 
D)  int number = inputFile.integer(); 
A)  int number = inputFile.nextInt(); 
B)  int number = inputFile.next(); 
C)  int number = inputFile.readInt(); 
D)  int number = inputFile.integer();

Question 2

If you are using a block of statements, don't forget to enclose all of the statements in a set of:

Accepted Answer

A)  Braces 
B)  Double quotes 
C)  Semicolons 
D)  Parentheses 
A)  Braces 
B)  Double quotes 
C)  Semicolons 
D)  Parentheses

Question 3

This is a value that signals when the end of a list of values has been reached.

Accepted Answer

A)  Terminal value 
B)  Final value 
C)  End value 
D)  Sentinel 
A)  Terminal value 
B)  Final value 
C)  End value 
D)  Sentinel

Question 4

A for loop normally performs which of these steps?

Accepted Answer

A)  initializes a control variable to a starting value 
B)  tests the control variable by comparing it to a maximum/minimum value and terminate when the variable reaches that value 
C)  updates the control variable during each iteration 
D)  all of the above 
E)  None of the above 
A)  initializes a control variable to a starting value 
B)  tests the control variable by comparing it to a maximum/minimum value and terminate when the variable reaches that value 
C)  updates the control variable during each iteration 
D)  all of the above 
E)  None of the above

Question 5

What will be the value of x after the following code is executed? int x, y = 4, z = 6;
X = (y++) * (++z);

Accepted Answer

A)  24 
B)  28 
C)  30 
D)  35 
A)  24 
B)  28 
C)  30 
D)  35

Question 6

A sentinel value _________ and signals that there are no more values to be entered.

Accepted Answer

A)  is a different data type than the values being processed 
B)  is a special value that cannot be mistaken as a member of the list 
C)  indicates the start of a list 
D)  guards the list 
A)  is a different data type than the values being processed 
B)  is a special value that cannot be mistaken as a member of the list 
C)  indicates the start of a list 
D)  guards the list

Question 7

Java provides a set of simple unary operators designed just for incrementing and decrementing variables.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A)  40 
B)  25 
C)  30 
D)  Invalid for statement 
A)  40 
B)  25 
C)  30 
D)  Invalid for statement

Question 9

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 
B)  Numbers greater than 500 
C)  Numbers in the range 100 - 499 
D)  Numbers in the range 100 - 500 
A)  Numbers less than 100 
B)  Numbers greater than 500 
C)  Numbers in the range 100 - 499 
D)  Numbers in the range 100 - 500

Question 10

Which of the following will open a file named MyFile.txt and allow you to append data to its existing contents?

Accepted Answer

A)  FileWriter fwriter = new FileWriter("MyFile.txt", true);
PrintWriter outFile = new PrintWriter(fwriter); 
B)  FileWriter fwriter = new FileWriter("MyFile.txt");
PrintWriter outFile = new PrintWriter(fwriter); 
C)  PrintWriter outfile = new PrintWriter("MyFile.txt", true); 
D)  PrintWriter outfile = new PrintWriter(true, "MyFile.txt"); 
A)  FileWriter fwriter = new FileWriter("MyFile.txt", true);
PrintWriter outFile = new PrintWriter(fwriter); 
B)  FileWriter fwriter = new FileWriter("MyFile.txt");
PrintWriter outFile = new PrintWriter(fwriter); 
C)  PrintWriter outfile = new PrintWriter("MyFile.txt", true); 
D)  PrintWriter outfile = new PrintWriter(true, "MyFile.txt");

Question 11

This type of loop is ideal in situations where you always want the loop to iterate at least once.

Accepted Answer

A)  while loop 
B)  do-while loop 
C)  for loop 
D)  if statement 
A)  while loop 
B)  do-while loop 
C)  for loop 
D)  if statement

Question 12

The increment operator is:

Accepted Answer

A)  ++ 
B)  -- 
C)  *= 
D)  -= 
A)  ++ 
B)  -- 
C)  *= 
D)  -=

Question 13

A loop that executes as long as a particular condition exists is called a(n)

Accepted Answer

A)  sentinel loop 
B)  conditional loop 
C)  count-controlled loop 
D)  infinite loop 
A)  sentinel loop 
B)  conditional loop 
C)  count-controlled loop 
D)  infinite loop

Question 14

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

Accepted Answer

A)  sentinel loop 
B)  conditional loop 
C)  counter-controlled loop 
D)  infinite loop 
A)  sentinel loop 
B)  conditional loop 
C)  counter-controlled loop 
D)  infinite loop

Question 15

When the continue statement is encountered in a loop, all the statements in the body of the loop that appear after it are ignored, and the loop prepares for the next iteration.

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

A)  10 
B)  200 
C)  This is an infinite loop. 
D)  The loop will not be executed, the initial value of x > 5. 
A)  10 
B)  200 
C)  This is an infinite loop. 
D)  The loop will not be executed, the initial value of x > 5.

Question 18

A file must always be opened before using it and closed when the program is finished using it.

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A)  1 
B)  3 
C)  4 
D)  5 
A)  1 
B)  3 
C)  4 
D)  5

Question 20

This type of loop allows the user to decide the number of iterations.

Accepted Answer

A)  Counter-controlled loop 
B)  Dynamically executed loop 
C)  User controlled loop 
D)  Infinite loop 
A)  Counter-controlled loop 
B)  Dynamically executed loop 
C)  User controlled loop 
D)  Infinite loop

Assuming that inputFile references a Scanner object that was used to open a file, which of the following statements will read an int from the file?

If you are using a block of statements, don't forget to enclose all of the statements in a set of:

This is a value that signals when the end of a list of values has been reached.

A for loop normally performs which of these steps?

What will be the value of x after the following code is executed? int x, y = 4, z = 6; X = (y++) * (++z);

A sentinel value _________ and signals that there are no more values to be entered.

Java provides a set of simple unary operators designed just for incrementing and decrementing variables.

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

Which of the following will open a file named MyFile.txt and allow you to append data to its existing contents?

This type of loop is ideal in situations where you always want the loop to iterate at least once.

The increment operator is:

A loop that executes as long as a particular condition exists is called a(n)

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

When the continue statement is encountered in a loop, all the statements in the body of the loop that appear after it are ignored, and the loop prepares for the next iteration.

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

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

A file must always be opened before using it and closed when the program is finished using it.

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

This type of loop allows the user to decide the number of iterations.

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Methods

A First Look at Classes

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File IO

A First Look at GUI Applications

Advanced GUI Applications

Applets and More

Creating GUI Applications With Javafx and Scene Builder

Recursion

Databases

Filters

Exam 4: Loops and Files

Assuming that inputFile references a Scanner object that was used to open a file, which of the following statements will read an int from the file?

If you are using a block of statements, don't forget to enclose all of the statements in a set of:

This is a value that signals when the end of a list of values has been reached.

A for loop normally performs which of these steps?

What will be the value of x after the following code is executed? int x, y = 4, z = 6; X = (y++) * (++z);

A sentinel value _________ and signals that there are no more values to be entered.

Java provides a set of simple unary operators designed just for incrementing and decrementing variables.

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

Which of the following will open a file named MyFile.txt and allow you to append data to its existing contents?

This type of loop is ideal in situations where you always want the loop to iterate at least once.

The increment operator is:

A loop that executes as long as a particular condition exists is called a(n)

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

When the continue statement is encountered in a loop, all the statements in the body of the loop that appear after it are ignored, and the loop prepares for the next iteration.

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

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

A file must always be opened before using it and closed when the program is finished using it.

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

This type of loop allows the user to decide the number of iterations.

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Methods

A First Look at Classes

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File IO

A First Look at GUI Applications

Advanced GUI Applications

Applets and More

Creating GUI Applications With Javafx and Scene Builder

Recursion

Databases

Filters