Practice for 11th AP Java Quiz

Which of the replacements for A and B would produce the output shown?

• A=5 B=4

• A=4 B=5

• A=4 B=3

• A=3 B=4

What is the output of this program?

• 2

• 3

• 4

• ArrayIndexOutOfBoundsException

What is the output of this program?

• 2

• 3

• 4

• ArrayIndexOutOfBoundsException

Which replacement for < MISSING CODE > traverses the array in row column order?

• A only

• B only

• C only

• D only

Given the declarations and initializations, which of the following would cause an error?

• letters1.contains('a')

• letters2.contains('a')

• letters3.contains("a")

• none of these would cause an error

What is the output of this program?

• 2

• 3

• 4

• ArrayIndexOutOfBoundsException

What is the output of this program?

• 1

• 2

• num: 1

• num: 2

Which replacement for /* missing code */ would correctly initialize buttons in Minesweeper?

• new MSButton(20,20)

• new MSButton[20][20]

• new MSButton(NUM_ROWS,NUM_COLS)

• new MSButton[NUM_ROWS][NUM_COLS]

Which replacement for /* missing code */ would correctly complete isValid in Minesweeper?

• return r >0 && r<NUM_ROWS&& c>0 && c<NUM_COLS

• return r >=0 && r<=NUM_ROWS&& c>=0 && c<=NUM_COLS

• return r >0 && r<=NUM_ROWS&& c>0 && c<=NUM_COLS

• return r >=0 && r<NUM_ROWS&& c>=0 && c<NUM_COLS

What is the output of this program?

• 0

• blank

• null

• error