Question

13 multiple choice 1 point what condition should be used in this while loop to get karel to pick up all the tennis balls on the current location? while (_______) { takeball(); } takeball() ballspresent() frontisclear() notballspresent() clear my selection 14 multiple choice 1 point say karel is at a location with one tennis ball. after the following code runs, how many tennis balls will there be at that location? for (let i = 0; i < 3; i++) { if (ballspresent()) { takeball(); } else { putball(); putball(); } } 0 6 1 2 clear my selection 15 multiple choice 1 point karel starts at row 1, column 1, facing east in a 5x5 world. what will happen after this code runs? assume this is a superkarel program. move(); move(); turnright(); move(); karel ends on row 2, column 3 this code wont run because of a syntax error karel will crash into a wall karel ends on row 1, column 3 clear my selection 16 multiple choice 1 point what is top - down design? top - down design is a way that you can create designs on a computer to put on a web page top - down design is a way of designing your programs starting with the individual commands first top - down design is a way of designing a program by starting with the biggest problem and breaking it down into smaller and smaller pieces that are easier to solve top - down design is a way to use loops and if statements to decompose the problem clear my selection 17 multiple choice 1 point what is the proper format for a single - line comment in karel? // this is a comment this is a comment # this is a comment / this is a comment / clear my selection

Explanation:

1. In the first question, to pick up all tennis - balls in a location, we need to check if a ball is present. The ballsPresent() function checks if there are balls at the current location. So the answer is ballsPresent().
2. In the second question, the for loop iterates 3 times. If a ball is present, it takes the ball, otherwise it puts a ball. Initially, assume there are no balls. In the first iteration, it puts a ball. In the second iteration, it puts another ball. In the third iteration, it puts a third ball. So there will be 3 balls at the location. But this is not in the options. If we assume there was 1 ball initially, in the first iteration it takes the ball, in the second and third iterations it puts 2 balls. So there will be 2 balls at the location.
3. In the third question, the move() function moves Karel one step forward. The turnRight() function turns Karel to the right. Starting at Row 1, Column 1 in a 5x5 world, after the given code runs (move twice and turn right and move once), Karel ends on Row 1, Column 3.
4. In the fourth question, top - down design is a way of designing your programs starting with the biggest problem and breaking it down into smaller and smaller pieces that are easier to solve.
5. In the fifth question, in Karel, the proper format for a single - line comment is // This is a comment.

Answer:

1. ballsPresent()
2. 2
3. Karel ends on Row 1, Column 3
4. Top down design is a way of designing your programs starting with the biggest problem and breaking it down into smaller and smaller pieces that are easier to solve.
5. // This is a comment