Numeric answers: select letters to total to your answer. For example 3 = d and e, 11 = b, d and e & 17 = a and e. a) 16 b) 8 c) 4 d) 2 e) 1

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1 Name Period Fill in the table below, identifying the street, avenue and direction of the Robot. (Assume no walls) Answer using the following key Directions: a) North b) South c) East d) West Numeric answers: select letters to total to your answer. For example 3 = d and e, 11 = b, d and e & 17 = a and e a) 16 b) 8 c) 4 d) 2 e) 1 Street Avenue Direction Robot karel = new Robot(3, 7, East, num) putbeeper (); move() At what location(s) did karel put beepers? 18. For the above code to execute without a run time error (error shutoff), what must be true about the locations of Beepers in the world in which karel exist? 19. What is the minimum value that num could be line 1 so that karel executes the code without a run time error (error shutoff)? Street Avenue Direction Robot karel = new Robot(1, 5, North, num) turnleft() At what location(s) did karel put beepers? 28. For the above code to execute without a run time error (error shutoff), what must be true about the locations of Beepers in the world in which karel exist? 29. What is the minimum value that num could be line 1 so that karel executes the code without a run time error (error shutoff)?

2 Using the additional user defined methods, fill in the table below, identifying the street, avenue and direction of the Robot. Assume there are NO walls in the World! public void turnright() public void dropbeeperandmoveback() leftuturn(); leftuturn(); public void leftuturn() public void move3steps() Street Avenue Direction Robot karel = new Robot(2, 3, North, num) move3steps(); leftuturn(); dropbeeperandmoveback(); 34. move3steps(); 35. dropbeeperandmoveback(); 36. move3steps(); dropbeeperandmoveback(); At what location(s) did karel put beepers? 43. For the above code to execute without a run time error (error shutoff), what must be true about the locations of Beepers in the world in which karel exist? 44. What is the minimum value that num could be in line 1 so that karel executes the code without a run time error (error shutoff)? 45. How many times is turnleft() invoked either directly or indirectly by another method? 46. How many times is move() invoked either directly or indirectly by another method?

3 Rewrite the following methods by factoring out common code & writing new user-defined methods. public void problem1() public void problem2() Assume the following methods have been properly defined! movebeeperforward(); climbstair(); pickthreebeepers(); public void problem4() movebeeperforward(); movebeeperforward(); climbstair(); movebeeperforward(); climbstair();

4 For the following lines of code, indicate the order of events: public static void main() Robot red =new Robot(13, 42, East, 10); 47 red is constructed red. 48 fish is constructed Robot blue =new Robot(6, 11, South, 4); 49 blue is constructed Robot fish =new Robot(27, 33, East, 3); 50 red picks Beeper blue. 51 blue puts Beeper blue. 52 fish puts Beeper fish. 53 red moves to 13, 43 red. 54 blue moves to 3, 4 Finally, how many Beepers does each of the following Robots have after executing the above code? red_ blue_ fish_ For each of the following lines of code, identify the error (if any) as: a) Syntax b) Lexical c) Run time d) intent e) none Assume the following World for each code segment. The intent of each Robot is to place another Beeper on the Beeper one block east and one block south of its current location. Beepers Robot karel = new Robot(3, 3, West, 5); Robot karel = new Robot(3, 6, South, 0); karel.move; karel.move(1); karel.turnleft(); karel.turn(); karel.move(); karel.move; karel. karel.

5 Consider the following code: Assume that turnaround() and turnright() work as expected! public void task() True/False: The following blocks of code are equivalent to the code above. That is, each of the following blocks of code completes the exact same task. Travels same streets, avenues, etc. Puts beepers, pick beepers on same corners. Assume each Robot has enough Beepers and there are NO walls in the World! 55. public void task() 56. public void task() 57. public void task() 58. public void task() 59. public void task() 60. public void task()

6 Identify the following as: 1 valid symbol name (A) or as an invalid symbol identifier (B) 2 if valid, identifier or method name (C) or a class name or Type (D) or cannot be determined (E) otherwise identify the error. 61. asmallrobot 62. One Fish 63. A57_ main 65. OneFish+TwoFish Valid/ invalid Identifier or method/ class or Type You will write the ReviewRobot methods that will have the Robot plant Beepers as shown in the following diagram. The Robot will stop at (11, 2) Implement the method movetwiceputbeeper: public void movetwiceputbeeper() Robot Beepers Using the method movetwiceputbeeper, implement the method plantrowof5beepers: public void plantrowof5beepers() // plant a Horizontal row Using the only the methods move and turnleft, implement the method movetl: public void movetl () Using the methods plantrowof5beepers and movetl, implement the method plant2rows: public void plant2rows() // plant two Horizontal rows Using the method plant2rows and movetr *, implement the method plantfield: public void plantfield() * Assume movetr does the same as movetl with turnright() replacing turnleft().