<p>Midterm Example questions:</p><p>Important!!! This is NOT a comprehensive list of topics for the exam. It does NOT cover all the topics required for the midterm. You should refer to the Midterm Review Sheet for a list of topics you are responsible for. This is just a set of exercises provided to you to practice for the midterm. </p><p>1. Consider a class Exam. It has the following instance variable:  an integer number of questions: n_questions  a double: duration. It also has the following:  getters and setters  a constructor that takes an integer and a double and assigns them to this object’s instance variables.  a no argument constructor that does not take any arguments and initializes n_questions to 0 and duration to 0.0  a toString method that returns the exam in the following format: This exam has n_questions and takes duration mins  equals method that takes an Exam object. It returns true if both objects have the same n_questions and duration and false otherwise. 2. Write an interface called Doable. It has one constant int DO_TIME = 5 and a void method justDoIt that takes no arguments. </p><p>3. What is wrong with the following codes? class Myclass { private int myx = 90; public static int givemeX () { return myx; } }</p><p>4. Assume a = 5 and b = 5, what is the output of the following and why?? if (a > 0) if (b < 0) x = x + 5; else if (a > 5) x = x + 4; else x = x + 3; else x = x + 2; 5. If x is an int where x = 1, what will x be after the following loop terminates? while (x < 100) x *= 2;</p><p>6. Use a loop to allow the user to enter 10 numbers, calculates their sum and average.</p><p>7. Write a method that returns true if the integer passed as an argument is even and false otherwise.</p><p>8. Use the DecimalFormat class to display the number 12356.25555555555 as 12,356.255</p><p>9. Write the following equation in Java using loops and the Math class. Assume all the variables used have been declared and initialized properly. 15 y  i x i0</p><p>10. Write the statements needed in order to add an image “mypic.gif” to a JPanel called mypanel. Assume that all the packages necessary have been imported and that the image file is placed in the same folder as the java file.</p><p>11. Write one line of code that breaks in half a string myname into two pieces. It then combines these pieces in the wrong order in a new string called flipname. For example assume myname = “lory”. Then, flipname = “rylo” .</p><p>12. Use the Scanner class to read a file called “myfile.txt” and prints its contents on the screen.</p>