ArrayList Review

Which of the following statement describes dynamic resizing as is applies to the ArrayList class?

• The size of a new ArrayList object must be specified at instantiation
• The size of an ArrayList object can be restated throughout a program.
• The size of an ArrayList object is fixed at instantiation.
• An ArrayList object changes size dynamically as new elements are added or removed.

What is the output of this program?

• names contains [Isolde, John, Greg, Maria, Heidi]
• names contains [Heidi, Maria, Greg, John, Isolde]
• names contains [John, Greg, Maria, Heidi]
• names contains [Isolde, John, Greg, Maria]

What is the output of this program segment?

• John Greg Jessica Heidi
• John Jessica Maria Heidi  
• John Jessica Greg Maria Heidi
• John Greg Jessica Maria Heidi

What is the output of this program segment?

• John Greg Jessica Heidi
• John Jessica Maria Heidi  
• John Jessica Greg Maria Heidi
• John Greg Jessica Maria Heidi

What is the output of this program segment?

• John Maria
• John Heidi  
• Greg Heidi
• Greg Maria 

What is the output of this program segment?

• John Maria
• John Heidi  
• Greg Heidi
• Error

What is the output of this program segment?

• [Jessica, Isolde, Jessica, John, Jessica, Greg, Jessica, Maria, Jessica, Heidi] 
• [Isolde, John, Greg, Maria, Heidi, Jessica, Jessica, Jessica, Jessica, Jessica]
• [Jessica, Jessica, Jessica, Jessica, Jessica, Isolde, John, Greg, Maria, Heidi] 
•             [Isolde, Jessica, John, Jessica, Greg, Jessica, Maria, Jessica, Heidi, Jessica]

What is the output of this program segment?

• [Anthony, Isolde,Anthony, John, Anthony, Greg, Anthony, Maria, Anthony, Heidi] 
• [Anthony,Anthony,Anthony,Anthony,Anthony] 
• [Isolde, John, Greg, Maria, Heidi,Anthony,Anthony,Anthony,Anthony,Anthony] 
• [Anthony,Anthony,Anthony,Anthony,Anthony, Isolde, John, Greg, Maria, Heidi] 

What is the output of this program?

• 11
  22
  33
  44
  55
• 55
• 11 22 33 44 55
• [11, 22, 33, 44, 55]

Java provides wrapper classes, which create objects that store primitive data types.   Which of the following are Java wrapper classes?

• int, double, boolean, string
• int, double, boolean
• Integer, Double, Boolean
• integer, real, logic