Question

multiple choice 1 point
in this code, how many times is the dance function called, and how many times is it defined?
function main() {
move();
dance();
move();
turnleft();
turnleft();
dance();
move();
turnleft();
dance();
}
function dance() {
turnleft();
move();
turnleft();
turnleft();
move();
turnleft();
}
main();
called 1 time, defined 1 time
called 3 times, defined 1 time
called 3 times, defined 3 times
called 1 time, defined 3 times
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multiple choice 1 point
what does the mystery function do?
function mystery() {
while (!ballspresent()) {
move();
}
}
karel checks if there is no ball on the current spot and then moves once
karel moves until it puts down a ball
karel moves once if there is no ball present
karel moves until it is on a ball
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multiple choice 1 point
which of the following commands is a valid karel command?
move;
move:
move
moved
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multiple choice 1 point
if karel starts at row 1 and column 1, facing east, where will karel be, and what direction will karel be facing after running the following code? (assume the world is 10x10 in size)
move();
turnleft();
putball();
turnleft();
turnleft();
turnleft();
move();
turnleft();
row 1, column 3, facing south
row 3, column 1, facing north
row 1, column 4, facing north
row 1, column 3, facing north
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Explanation:

Question 6

The dance function is defined once at the bottom - part of the code. It is called three times within the main function (the three dance() calls).

The mystery function has a while loop that checks !beepersPresent() (i.e., no beepers present) and moves if that condition is true. So it moves until it is on a beeper.

In Karel programming, the valid move command is move().

Answer:

B. Called 3 times, defined 1 time

Question 7