AP CSP Unit 5

Consider the JavaScript code segment below. Which statement should be used in place of <missing code> such that the alarm is set to 9:00 am on weekends, and 6:30 am on weekdays.

var day = prompt("What day is it tomorrow?");

if ( <missing code> ){

setAlarm = "9:00am";

}

else {

setAlarm = "6:30am";

}

• day == "Saturday"

• day == "Sunday"

• (day == "Saturday") || (day == "Sunday")

• (day == "Saturday") && (day == "Sunday")

After running the following code segment, what is contained in the array data?

• [3, 1, 8, 4, 4]

• [2, 3, 4, 5, 6]

• [2, 3, 4, 5, 4]

• [3, 1, 8, 4 null]

Choose the best description of what the mystery procedure below does.

PROCEDURE mystery (list, n)

{

i = 1

REPEAT LENGTH(list) TIMES

{

IF ( list[i] = n )

{

DISPLAY (i)

}

i = i+1

}

}

• Mystery displays the number at index n.

• Mystery displays the index of the first occurrence of the value n in the list.

• Mystery displays the index of the last occurrence of the value n in the list.

• Mystery displays the index of every occurrence of the value n in the list.

Which of the following best describes the value returned by the procedure below?

PROCEDURE mystery (data)

{

count = 0

i = 1

REPEAT UNTIL (i = LENGTH(data))

{

IF (data[i] < data[i+1])

{

count = count + 1

}

i = i+1

}

RETURN (count)

}

The answers below refer to values being in ascending and descending order. Ascending order means increasing, as in: [1, 2, 5, 8]. Descending order means decreasing, as in [20, 15, 7, 3].

• The procedure returns true when data is in ascending order

• The procedure returns false when data is in descending order

• The procedure returns the number of times adjacent items are in ascending order

• The procedure returns how long it takes to find two numbers in ascending order

A robot starts in a grid facing north (B3). What is the robot's location and direction after the following program is executed?

data = ["F", "F", "R", "F", "L", "F", "R", "R", "F"]

FOR EACH move IN data

{

IF ( move = "F" AND CAN_MOVE(forward) )

{

MOVE_FORWARD()

}

ELSE IF (move = "R"){

rotate_right()

}

ELSE IF ( move = "L") {

rotate_left()

}

}

• 
• 
• 
•