Question 1

How many times will the following for loop be executed? for (int count = 10;count < = 21;count++)
System.out.println("Java is great!!!");

Accepted Answer

A)  1 
B)  10 
C)  11 
D)  0 
A)  1 
B)  10 
C)  11 
D)  0

Question 2

When the break 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 3

In all but rare cases,loops must contain within themselves

Accepted Answer

A)  arithmetic statements 
B)  if statements 
C)  a way to terminate 
D)  nested loops 
A)  arithmetic statements 
B)  if statements 
C)  a way to terminate 
D)  nested loops

Question 4

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

Accepted Answer

A)  File file = new File("MyFile.txt"); 
B)  Scanner inputFile = new Scanner("MyFile.txt"); 
C)  File file = new File("MyFile.txt");
Scanner inputFile = new Scanner(file); 
D)  PrintWriter inputFile = new PrintWriter("MyFile.txt"); 
A)  File file = new File("MyFile.txt"); 
B)  Scanner inputFile = new Scanner("MyFile.txt"); 
C)  File file = new File("MyFile.txt");
Scanner inputFile = new Scanner(file); 
D)  PrintWriter inputFile = new PrintWriter("MyFile.txt");

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A)  90 
B)  110 
C)  210 
D)  This is an infinite loop 
A)  90 
B)  110 
C)  210 
D)  This is an infinite loop

Question 7

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?

Accepted Answer

A)  while (inputFile != null)
{ … } 
B)  while (!inputFile.EOF)
{ … } 
C)  while (inputFile.hasNext())
{ … } 
D)  while (inputFile.nextLine == " ")
{ … } 
A)  while (inputFile != null)
{ … } 
B)  while (!inputFile.EOF)
{ … } 
C)  while (inputFile.hasNext())
{ … } 
D)  while (inputFile.nextLine == " ")
{ … }

Question 8

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 9

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

Accepted Answer

A) True 
 B)False

Question 10

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 11

What will be the values of x and y as a result of the following code? 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 = 4 
A)  x = 12,y = 5 
B)  x = 16,y = 4 
C)  x = 17,y = 5 
D)  x = 17,y = 4

Question 12

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 13

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 14

The do-while loop is a pre-test loop.

Accepted Answer

A) True 
 B)False

Question 15

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

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 16

If a loop does not contain within itself a way to terminate,it is called a(n)

Accepted Answer

A)  while loop 
B)  do-while loop 
C)  for loop 
D)  infinite loop 
A)  while loop 
B)  do-while loop 
C)  for loop 
D)  infinite loop

Question 17

What will be the value of x after the following code is executed? int x,y = 15,z = 3;
X = (y--)/ (++z);

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
A)  3 
B)  4 
C)  5 
D)  6

Question 18

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 19

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 20

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();

Exam 4: Loops and Files

How many times will the following for loop be executed? for (int count = 10;count < = 21;count++) System.out.println("Java is great!!!");

When the break 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.

In all but rare cases,loops must contain within themselves

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

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

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

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?

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

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

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

What will be the values of x and y as a result of the following code? int x = 12,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 do-while loop is a pre-test loop.

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

If a loop does not contain within itself a way to terminate,it is called a(n)

What will be the value of x after the following code is executed? int x,y = 15,z = 3; X = (y--)/ (++z);

A for loop normally performs which of these steps?

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

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?

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Methods

A First Look at Classes

A First Look at Gui Applications

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

Advanced Gui Applications

Applets and More

Recursion

Sorting, Searching, and Algorithm Analysis

Generics

Collections

Array-Based Lists

Linked Lists

Stacks and Queues

Binary Trees, Avl Trees, and Priority Queues

Filters