Question 1

An employer has decided to award a weekly pay raise to all employees by taking the square root of the difference between his weight and the employee's weight. For instance, an employee who weighs 16 pounds less than the employer will get a $4 per week raise. The raise should be in whole dollars (an int). Assume that employerWeight and employeeWeight are both int variables that have been input. Write an assignment statement to compute the int value for raise.

Accepted Answer

The answer of An employer has decided to award a...

Question 2

If String name = "George W. Bush"; then the instruction name.length(); will return 14.

Accepted Answer

A) True 
 B)False

Question 3

If String a = "ABCD" and String b = "abcd" then
a.equals(b); returns false but
a.equalsIgnoreCase(b); returns true.

Accepted Answer

A) True 
 B)False

Question 4

If x is the String "Hi There", then x.toUpperCase().toLowerCase(); will return the original value of x.

Accepted Answer

A) True 
 B)False

Question 5

Since you cannot take the square root of a negative number, which of the following could you use to find the square root of the variable x?

Accepted Answer

A)  Math.sqrt(x*x); 
B)  Math.sqrt((int)x); 
C)  Math.sqrt(Math.abs(x)); 
D)  Math.abs(Math.sqrt(x)); 
E)  Math.sqrt(-x);

Question 6

Given the double likelihood = 0.013885 and given DecimalFormat dformatter = DecimalFormat("0.00##");
What would be the output if you execute the following:
System.out.println(df.format(likelihood));

Accepted Answer

A)  0.013885 
B)  0.0139 
C)  0.0145 
D)  .0138 
E)  .014

Question 7

You cannot cast a String to be a char and you cannot cast a String which stores a number to be an int, float, or double.

Accepted Answer

A) True 
 B)False

Question 8

Example Code Ch 02-1
public class Questions1_4
{
public static void main(String[] args)
{
System.out.print("Here");
System.out.println("There " + "Everywhere");
System.out.println("But not" + "in Texas");
}
}
-Refer to the class definition in Example Code Ch 02-1. How many lines of output are provided by this program?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 9

Which library package would you import to use NumberFormat and DecimalFormat?

Accepted Answer

A)  java.beans 
B)  java.io 
C)  java.lang 
D)  java.text 
E)  java.util

Question 10

Write an output statement which will output the following characters exactly as shown:
/ ' \" / ' \

Accepted Answer

The answer of Write an output statement which will output...

Question 11

If you want to store the value "Harry Potter" in the String variable name, which of the following statements could you use?

Accepted Answer

A)  String name = "Harry Potter"; 
B)  String name = new String("Harry Potter"); 
C)  String name = "Harry" + " " + "Potter"; 
D)  String name = new String("Harry" + " " + "Potter"); 
E)  Any of these would work

Question 12

Explain what the following statement computes:
int z = (int)Math.ceil(Math.sqrt(x)/Math.sqrt(y));

Accepted Answer

The answer of Explain what the following statement computes:
int z...

Question 13

If x is an int and y is a float, which of the following statements is not a legal assignment statement?

Accepted Answer

A)  y = x; 
B)  x = y; 
C)  y = (float)x; 
D)  x = (int)y; 
E)  All of these are legal assignment statements

Question 14

There are three ways that data conversion may occur: by assignment, by promotion, and by casting.

Accepted Answer

A) True 
 B)False

Question 15

Using getCurrencyInstance() formats a variable, automatically inserting

Accepted Answer

A)  a decimal point for cents 
B)  a dollar sign 
C)  a percent sign 
D)  all three of these 
E)  a decimal point for cents and a dollar sign but not a percent sign

Question 16

Assume that x, y, and z are all ints equal to 50, 20, and 6 respectively. What is the result of: x / y / z

Accepted Answer

A)  0 
B)  12 
C)  16 
D)  this would cause a syntax error 
E)  this would cause a run-time error because it is a division by zero

Question 17

Given two points in an applet represented by the four int variables x1, y1, x2 and y2, write a paint method to draw a line between the two points and write the location of the two points next to the two points.

Accepted Answer

The answer of Given two points in an applet represented...

Question 18

If the String major = "Computer Science", what is returned by major.charAt(1)?

Accepted Answer

A)  'C' 
B)  'o' 
C)  'm' 
D)  "C" 
E)  "Computer"

Question 19

A Java variable is the name of a

Accepted Answer

A)  numeric data value stored in memory 
B)  data value stored in memory that cannot change during the program's execution 
C)  data value stored in memory that can change its value but cannot change its type during the program's execution 
D)  data value stored in memory that can change both its value and its type during the program's execution 
E)  data value or a class stored in memory that can change both its value and its type during the program's execution

Question 20

As presented in the Software Failure section of the text, the root cause of the Mars Climate Orbiter problem was

Accepted Answer

A)  the cost of the project 
B)  an inability to track the orbiter at long distances 
C)  atmospheric friction 
D)  a communication issue between subsystems 
E)  None of these

Exam 2: Data and Expressions

If String name = "George W. Bush"; then the instruction name.length(); will return 14.

If String a = "ABCD" and String b = "abcd" then a.equals(b); returns false but a.equalsIgnoreCase(b); returns true.

If x is the String "Hi There", then x.toUpperCase().toLowerCase(); will return the original value of x.

Since you cannot take the square root of a negative number, which of the following could you use to find the square root of the variable x?

Given the double likelihood = 0.013885 and given DecimalFormat dformatter = DecimalFormat("0.00##") ; What would be the output if you execute the following: System.out.println(df.format(likelihood) ) ;

You cannot cast a String to be a char and you cannot cast a String which stores a number to be an int, float, or double.

Which library package would you import to use NumberFormat and DecimalFormat?

Write an output statement which will output the following characters exactly as shown: / ' \" / ' \

If you want to store the value "Harry Potter" in the String variable name, which of the following statements could you use?

Explain what the following statement computes: int z = (int)Math.ceil(Math.sqrt(x)/Math.sqrt(y));

If x is an int and y is a float, which of the following statements is not a legal assignment statement?

There are three ways that data conversion may occur: by assignment, by promotion, and by casting.

Using getCurrencyInstance() formats a variable, automatically inserting

Assume that x, y, and z are all ints equal to 50, 20, and 6 respectively. What is the result of: x / y / z

Given two points in an applet represented by the four int variables x1, y1, x2 and y2, write a paint method to draw a line between the two points and write the location of the two points next to the two points.

If the String major = "Computer Science", what is returned by major.charAt(1) ?

A Java variable is the name of a

As presented in the Software Failure section of the text, the root cause of the Mars Climate Orbiter problem was