AP CSA Review

Which of these declarations is illegal?

• Shape foo = new Rectangle();

• Shape bar = new Square();

• 
  Rectangle zim = new Square();

• Ellipse dib = new Shape();

• 
  Ellipse gaz = new Circle();

Does this example show any method that are OVER LOADED?

• Yes

• No

Does this example show any method that are OVERRIDDEN?

• Yes

• No

Does this example show any POLYMORPHIC methods?

• Yes

• No

What is returned by the .add( Object E) method in the ArrayList class?

• true

• The object that is added

• The position where the object is added

• It has a void return type. Nothing is returned

Consider the following code segment.

System.out.println("W");

System.out.println("X");

System.out.print("Y");

System.out.print("Z");

What is printed as a result of executing the code segment?

• WXYZ

• W

  XYZ

• WX

  YZ

• W

  X

  YZ

• W

  X

  Y

  Z

Consider the following code segment.

String str = "AP";

str += "CS " + 1 + 2;

System.out.println(str);

What is printed as a result of executing the code segment?

• CS AP12

• AP CS3

• CSAP 12

• APCS 12

• APCS 3

• 45

• 50

• 55

• 60

• 66

Which two statements are used to implement iteration?

• IF and WHILE
• ELSE and WHILE
• FOR and WHILE
• IF and ELSE

What is the value of pos after the following code executes?

String s1 = "ac ded ca";

int pos = s1.indexOf("d");

• 3

• 4

• 5

• -1