CSIS 212 Final Exam.

CSIS 212 Final Exam. Course 202020 Spring 2020 CSIS 212-B01 LUO Test Final Exam Started 3/6/20 7:51 PM Submitted 3/6/20 8:45 PM Due Date 3/6/20 11:59 PM Status Completed Attempt Score 144 out of 150 points Time Elapsed 53 minutes out of 2 hours Instructions covers Modules/Weeks 5–8 open-book, open-notes 2-hour time limit 50 questions - Multiple Choice and True/False Do not click the BACK button because this will lock you out of the exam. The timer will continue if you leave this exam without submitting it. Results Displayed Submitted Answers, Feedback • Question 1 3 out of 3 points Which statement below could be used to simulate the outputs of tossing a quarter to get heads or tails? Suppose randomNumbers is a SecureRandom object. Selected Answer: randomNInt(2); • Question 2 3 out of 3 points Overloaded methods always have the same . Selected Answer: method name • Question 3 3 out of 3 points The identifiers in an enumeration . Selected Answer: must be unique. • Question 4 3 out of 3 points Declaring main as static allows the JVM to invoke main . Selected Answer: without creating an instance of the class in which main is declared. • Question 5 3 out of 3 points Variables should be declared as fields only if . Selected Answer: they are required for use in more than one method or their values must be saved between calls to the class’s methods • Question 6 3 out of 3 points The package contains classes for manipulating all of the following items except . Selected Answer: classes • Question 7 3 out of 3 points Which set of statements totals the items in each row of two-dimensional array items, and displays each row’s total? Selected Answer: for (int row = 0; row h; row++) { int total = 0; for (int column = 0; column items[row].length; column++) { total += items[row][column]; Sf("Row %d's total is %d%n", row, total); } • Question 8 Which of the following statements is false? 3 out of 3 points Selected Answer: When an argument is passed by reference, the called method can access the argument’s value in the caller directly but cannot modify it. • Question 9 A programmer must do the following before using an array: 3 out of 3 points Selected Answer: declare then create the array. • Question 10 0 out of 3 points How many Book objects are created by the following statement? Book[] books = new Book[10]; Selected Answer: None of the above. • Question 11 In Java, multidimensional arrays . 3 out of 3 points Selected Answer: All of the above. • Question 12 3 out of 3 points What do the following statements do? double[] array; array = new double[14]; Selected Answer: Create a double array containing 14 elements. • Question 13 3 out of 3 points A constructor cannot: Selected Answer: Constructors: Selected Answer: specify return types or return values. • Question 14 Both (a) and (c). • Question 15 3 out of 3 points 3 out of 3 points Which syntax imports all static members of class Math? Selected Answer: import static .Math.*. • Question 16 3 out of 3 points Using public set methods helps provide data integrity if: Selected Answer: Both b and c. • Question 17 3 out of 3 points Instance variables declared final do not or cannot: Selected Answer: Be modified after they are initialized. • Question 18 3 out of 3 points When no access modifier is specified for a method or variable, the method or