PreTest.doc. That was so much fun, lets do it again :^) Name Period. 1 Beeper. 25. How many Beepers are in Karel BeeperBag?

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1 Name Period That was so much fun, lets do it again :^) Assume the following World for each code segment. Fill in the table below, identifying the street, avenue and direction of the Robot. Street Avenue Direction 1. Robot karel = new Robot(4, 3, North, 2) 4 3 North 2. if (karel.frontisclear()) if (karel.nexttoabeeper ()) karel.pickbeeper(); if (karel.nexttoabeeper()) karel.pickbeeper(); 7. if (karel.facingwest()) if (!karel.frontisclear()) 12. if(karel.facingeast() && karel.anybeepersinbeeperbag()) 13. if (karel.frontisclear()) if ( karel.facingeast() ) 14. How many Beepers are in karel s beeper bag? 1 Beeper Using the original World in the previous table, fill in the table below. Assume turnright has been defined Street Avenue Direction 15. Robot karel = new Robot(5, 8, West, 5) 16. if (karel.frontisclear()) 17. if (!karel.frontisclear()) 18. if (karel.frontisclear()) if ( karel.facingsouth() && karel.frontisclear() ) karel.turnleft() if (karel.nexttoabeeper()) karel.pickbeeper(); if (karel.anybeepersinbeeperbag()) 23. if (karel.facingeast()) if (karel.frontisclear() karel.turnright(); karel.turnright(); if ( karel.facingnorth() ) karel.turnright(); 24. if (karel.anybeepersinbeeperbag()) 25. How many Beepers are in Karel BeeperBag? pretest.doc

2 Consider the following four Robot classes with the constructor deleted. public class TinRobot extends Robot /* constructor not shown */ public void moveforward(int num) for(int j = 0; j < num; j++) public void oilme() if (nexttoabeeper()) pickbeeper(); if (nexttoabeeper()) pickbeeper(); public class H20_Robot extends TinRobot /* constructor not shown */ public void drink() oilme(); moveforward(3); public void fly() turnleft(); if (frontisclear()) public class RedRobot extends SmartRobot /* constructor not shown */ public void turnaround() turnleft(); turnleft(); public void hopback() turnaround(); turnaround(); public class FishRobot extends RedRobot /* constructor not shown */ public void swim() turnleft(); public void shuffle() putbeeper(); facenorth()); putbeeper(); Consider the following code fragments that construct Robots. TinRobot sn = new TinRobot(3, 4, North, 3); RedRobot rover = new RedRobot(7, 3, West, 12); H20_Robot water = new H20_Robot(5, 1, East, 2); FishRobot bait = new FishRobot (12, 6, South, 8); For each line of code below, circle if it compiles without error and draw a line through it if it is a compiler error! sn. rover.turnleft(); water.drink(); bait.oilme(); sn.oilme(); rover.moveforward(7); water.moveforward(123); bait.turnaround(); sn.drink(); rover.turnaround(); water.hopback(); bait.shuffle(); sn.turnaround(); rover.shuffle(); water.pickbeeper(); bait.putbeeper(); sn.swim(); rover.fly(); water. bait.swim(); sn.fly(); rover.facenorth(); water.fly(); bait.fly(); Fill in the table below, identifying the street, avenue, direction of the Robot and the number of beepers the Robot has in beeper bag. Assume no walls & 1 Beepers every where. Assume the Robot declarations above Street Avenue Direction Num Beep s 26. sn. 4 4 North rover.turnaround(); 7 3 East water.putbeeper(); 5 1 East bait South sn.moveforward(3); 31. sn. 32. sn.turnleft(); 33. sn.oilme(); 34. sn.oilme(); 35. rover.turnaround(); 36. rover.hopback(); 37. rover.putbeeper(); 38. rover.hopback(); 39. rover.turnleft(); 40. water.fly(); 41. water. moveforward(5); 42. water.putbeeper(); 43. water.drink(); 44. water.fly(); 45. bait.swim(); 46. bait.shuffle(); 47. bait.turnleft(); 48. bait.turnaround(); 49. bait.shuffle();

3 Consider the World shown to the Right and the following SmarterRobot declaration! Recall SmarterRobot as the following additional methods: turnaround() and turnright(). SmarterRobot bot = new SmarterRobot (3, 3, North, 5); Fill in the table below, identifying the street, avenue, direction and number of Beepers in beeper Bag. Street Avenue Direction Num Beep s 50. if (!bot.frontisclear()) bot.turnaround(); if (!bot.nexttoabeeper()) 53. bot.turnaround(); 54. if (bot.nexttoabeeper()) bot.putbeeper (); if ( bot.frontisclear() ) bot.turnright(); if (bot.nexttoabeeper()) 59. if (bot.nexttoabeeper()) 1 Beeper Just continue with what you are doing Current status 1 1 West 7 Your Robot should be here 60. /* what command List all commands */ 1 1 East if (bot.nexttoabeeper() ) 62. /* what command List all commands */ 1 3 North while(bot.frontisclear()) 64. /* what command List all commands */ 6 3 East if bot.facingnorth() ) bot.putbeeper(); bot.turnright()) 67. while(bot.frontisclear()) 68. /* what command List all commands */ 1 4 East while(!bot.nexttoabeeper()) bot.putbeeper() 70. bot.facenorth() bot.turnleft(); for(int k = 0; k < 15; k++)) bot.turnleft(); 75. while(bot.anybeepersinbeeperbag()) bot.putbeeper() 76. How many Beepers are on corner (1, 7)

4 77. if ( * 10 <= 2 * Math.pow(3, 3)) System.out.println("A winner"); System.out.println("A loser"); 78. if ( (4 * <= 6 * 7) && (3 * -2 > 3 * -3)) System.out.println("I love karel"); System.out.println("I love Alice"); 79. if ( (4 * 15 <= 7 * 7) && (3 * 7 >= 5 * 4) ) System.out.println("I love math"); System.out.println("I love comp sci"); Use the following variables to answer questions #80-83 int num = 10, value = 25, negnum = -10, x = 25; 80. if ( num > x + negnum) System.out.println(num + " wins"); System.out.println(num + " loses"); 81. if ( 3 * num > x - negnum) System.out.println("2 * " + num + " wins"); System.out.println(negNum + " wins"); 82. if ( (2 * num!= -negnum + 5) &&!(value / num == 2) ) System.out.println("AND wins" ); System.out.println("AND Loses"); 83. if ( (x % 2 == 0) (value % 15 - x < 0) ) System.out.println("OR wins"); System.out.println("OR Loses"); 84. if ( (2 < -1) (5 > -6) && (7 < 11)) System.out.println("I am really confused"); System.out.println("No, I am not confused"); 85. if ( (-2 < -1) (-5 > -5) (7 < -11)) System.out.println("I love if statements"); System.out.println("I love conditionals"); 86. if ( (-2 < -1) && (5 > -6) && (7 < 11)) System.out.println("Fight on"); System.out.println("whine more"); 87. if ( -2 < -1 ) if ( (2-3 * -4) > (3 * 5 - (3-8) ) ) System.out.println("A nested if"); System.out.println(" in nested if"); System.out.println("Failed nested if"); 88. if ( 2 < -1 ) if ( (2-3 * -4) < (3 * 5 - (5-7) ) ) System.out.println("Another if" ); System.out.println("then- if"); if ( (2-3 * 4) < (3 * 5 - (25-7) ) ) System.out.println("-then if"); System.out.println("^2 nested if"); 89. if ( % 11 > 11 / 2) System.out.println("a toughie"); System.out.println("an easy one!"); 90. System.out.print("A"); System.out.println(" cat in"); System.out.print("the ); System.out.println("hat"); System.out.println("is a"); System.out.print("Dr."); System.out.println("Seuss"); System.out.print("Book");

5 Consider the following class definition: public class Functions public int fun1(int a, int b) return 5 * a - 3 * b - 7; public int fun2(int x, int y) int ans = 2 * x + y - 1; if (x <= y) ans = x * ans + y; ans = y * ans + x; return 10 + ans / 2; Give the output for the following code segments. Also assume SOP is System.out.println() 91. System.out.println( myf.fun1(0, 0) ); System.out.println( myf.fun1(2, 5) ); System.out.println( myf.fun1(4, 7) ); System.out.println( myf.fun1(11, 3) ); System.out.println( myf.fun1(-2, -5) ); 92. System.out.println( myf.fun2(0, 0) ); System.out.println( myf.fun2(2, 5) ); System.out.println( myf.fun2(-2, -5) ); 93. System.out.println( myf.myfun(0, 0, 0) ); public int myfun(int x, int y, int z) int ans = 0; if (x > y && x < z) ans = 2 * x + y - z; ans = x + 2 * y + z; ans--; return ans; System.out.println( myf.myfun(2, 5, 1) ); System.out.println( myf.myfun(2, 1, 3) ); 94. System.out.println( myf.morefun(2, 5) ); System.out.println( myf.morefun(8, 3) ); System.out.println( myf.morefun(6, 3) ); public double morefun(int val, int num) double ans = Math.pow(val, num) - val % num; if (ans < 100) ans = ans % 100.; ans++; return ans; public String wordmaker(string str, int s) String ans = "pre" + str; if (s % 2 == 0) ans = str + "ing"; ans = str + "s"; return ans; 95. System.out.println( myf.wordmaker("fop", 0)); System.out.println( myf.wordmaker("ict", 1)); System.out.println( myf.wordmaker("troy", 3)); System.out.println( myf.wordmaker("fresh", 2)); Use the following variables to answer questions #96-98 Functions myf = new Functions(); int value = 20, negnum = -10; 96. System.out.println(myF.fun1(myF.fun1(value, 20), negnum)); 97. System.out.println(myF.fun1(myF.fun2(value, 1), myf.fun2(5, 1))); 98. System.out.println(myF.myFun(2 * 3 + 1, (5 + 2 * 4) % 5, / 3));

6 Give the output for the following code segments. Also assume SOP is System.out.println() 99. public void loops1() for(int j = 1; j <= 10; j = j + 2) int value = 2 * j + 1; System.out.println(j + " " + value); 100.public void loops2() for(int j = 0; j < 5; j++) int value = j * j - 3; System.out.println(j + " " + value); 101.public void loops3() for(int j = 5; j <= 11; j = j + 2) int k = 1; while(k < j) System.out.println(j + " : " + k); K = k + 3; 102.public void loops4() for(int j = 1; j <= 100; j = j * 3) int k = 1; while(k <= j) k = k 1; System.out.println(j + : + k); k = k + 20; 103.loops5(98045); public void loops5(int j) while(j > 0) int num = j % 10; System.out.println(num); j = j / 10; 104.Calculate twice. Once for loops6(5) & for loops6(9); public void loops6(int j) int ans = 1; while(j > 0) ans = ans * j; j--; System.out.println(ans); 105.Calculate twice. Once for loops7(2, 8) & for loops7(4, 9); public void loops7(int j, int k) for(int ind = 0; ind < j; ind++) for(int inner = ind; inner < k; inner = inner+2) if ( 2 * ind - inner > 0) System.out.print( positive ); System.out.print( negative ); System.out.println( is it over yet? );

7 Consider the following nested loops which instantiate (construct) Robots which put a beeper on their corner before being turned off. Robot karel; for (int j = 0; j < 20; j = j + 3) for (int k = 1; k < 10; k = k + 4) karel = new Robot(j + 1, 2 * k + 1, East, 9); True/false: A beeper has been put at the following corner locations (street, avenue). (1,1) (5, 5) (4, 15) (19, 11) (10, 19) (1, 3) (19, 10) (16, 11) (15, 9) (17, 11) For each set of output, write a (for/while) loop that generates the same output * 3 * 5 * 7 * 9 * 11 * 13 = correctanswer //== Sample written questions Consider the partially define class. You will implement the three methods collectbeepersinrow, movetosecondcornerwithabeeper and task public class PreTestRobot extends SmarterRobot public PreTestRobot (int st, int ave, Direction dir, int num) super(st, ave, dir, num); public void directionalmove() /* to be implement by you in part A */ public void movetosecondcornerwithabeeper() /* to be implement by you in part B */ public void task() /* to be implement by you in part C */ <somevalue> = correctanswer A. Implement the method directionalmove which moves the Robot as follows: If the Robot is facing East or West, the Robot should move in its current direction forward 5 corners. Otherwise, the Robot should move in its current direction forward 3 corners. You may assume that there will be NO walls in the way! public void directionalmove() * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 = correctanswer //== 1024

8 B. Implement the method movetosecondcornerwithabeeper which causes the Robot forward (without turning) until the Robot is on a corner with at least one beeper. The Robot should repeat this process a second time. If the Robot starts on a corner with a beeper, that is consider to be the first corner encountered by the Robot. Therefore, the minimum distance this method may move a Robot is one corner! public void movetosecondcornerwithabeeper () C. Implement the method task which causes the Robot to perform the following maneuvers! i. Starting at its current location, if the Robot is facing East or West, the Robot should move in its current direction forward 5 corners. Otherwise, the Robot should move in its current direction forward 3 corners. You may assume that there will be NO walls in the way! ii. At the end of step I, if there is a wall in front of the Robot, the Robot should turn right, otherwise the Robt should turn left. iii. The Robot should move forward (without worrying about walls) to the second corner that has at least one beeper on it. If the Robot is on a corner with a Beeper, this qualifies as the first corner. iv. The Robot should move East one corner and then empty its beeper bag. In implementing the task method, you may assume that (and should use) directionalmove and movetosecondcornerwithabeeper work as intended regardless of what you wrote. public void task()

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

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 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: