INSY4305 Final Exam Questions PDF

Quizlet-style Flashcards: Complete Set of 40 Questions ====================================================== Question 1 ---------- What is the equivalent code for \`if (gender == 1) { if (age \>= 65) { ++seniorFemales; } }\`? - a\. \`if (gender == 1 \|\| age \>= 65) { ++seniorFemales; }\` -...

Quizlet-style Flashcards: Complete Set of 40 Questions ====================================================== Question 1 ---------- What is the equivalent code for \`if (gender == 1) { if (age \>= 65) { ++seniorFemales; } }\`? - a\. \`if (gender == 1 \|\| age \>= 65) { ++seniorFemales; }\` - b\. \`if (gender == 1 && age \>= 65) { ++seniorFemales; }\` - c\. \`if (gender == 1 AND age \>= 65) { ++seniorFemales; }\` - d\. \`if (gender == 1 OR age \>= 65) { ++seniorFemales; }\` Correct Answer: b Question 2 ---------- Which methods are overloaded among the given examples? - Methods listed: - \- public int max(int a, int b) { } - \- public double max(double a, double b) { } - \- public int max(int a, int b, int c) { } - \- public double max(double a, double b, double c) { } - a\. A and B are overloaded; C and D are overloaded. - b\. A and C are overloaded; B and D are overloaded. - c\. A, B, and C are overloaded. - d\. All four methods are overloaded. Correct Answer: d Question 3 ---------- What is the correct code for calling the method \`public void displayValue(int value)\`? - a\. \`int x = 7; void displayValue(x);\` - b\. \`int x = 7; displayValue(x);\` - c\. \`int x = 7; displayValue(int x);\` - d\. \`int x = 7; displayValue(x)\` Correct Answer: b Question 4 ---------- What is the value of \`c\` at the end of the code \`int c = 8; c++; ++c; c %= 5;\`? - a\. \`0\` - b\. \`1\` - c\. \`3\` - d\. None of the above. Correct Answer: a Question 5 ---------- What are the values of \`x\` and \`y\` after executing the code \`int x = 25, y = 8; x += y++;\`? - a\. \`x = 34, y = 9\` - b\. \`x = 25, y = 8\` - c\. \`x = 33, y = 8\` - d\. \`x = 33, y = 9\` Correct Answer: d Question 6 ---------- What is the value of \`result\` after executing the expression \`result = d % a \* c + a % b + a;\` with \`a=4, b=12, c=37, d=51\`? - a\. \`119\` - b\. \`51\` - c\. \`127\` - d\. \`59\` Correct Answer: a Question 7 ---------- Which keyword indicates the \`main\` method can be called without creating an object? - a\. \`stable\` - b\. \`private\` - c\. \`static\` - d\. \`public\` Correct Answer: c Question 8 ---------- What format specifier is used to output float or double values? - a\. \`%f\` - b\. \`%d\` - c\. \`%fd\` - d\. \`%r\` Correct Answer: a Question 9 ---------- Which statement ensures a variable \`temp\` is between 0 and 100 inclusively? - a\. \`if (temp \>= 0 && temp \ 0 && temp \= 0 \|\| temp \ 0 \|\| temp \< 100)\` Correct Answer: a Question 10 ----------- What is the value of \`charges\` after the code \`charges = time \>= 119 ? rate \* 2 : time / 60.0 \* rate;\` with \`time = 180\` and \`rate = 7.00\`? - a\. \`7.00\` - b\. \`14.00\` - c\. \`21.00\` - d\. \`28.00\` Correct Answer: c Quizlet-style Flashcards: Questions 11-20 ========================================= Question 11 ----------- What is the result of swapping the elements of arrays \`x\[\]\` and \`y\[\]\`? - a\. \`x\[\] = {36, 78, 12, 24}, y\[\] = {23, 55, 83, 19}\` - b\. \`x\[\] = {36, 78, 12, 24} and y\[\] = {36, 78, 12, 24}\` - c\. \`This is a compile error.\` - d\. \`Nothing. This is a runtime error.\` Correct Answer: a Question 12 ----------- What does declaring a field \`static\` mean? - a\. A copy of the field for each method in the class. - b\. A copy of the field in each class object. - c\. Only one copy of the field in memory. - d\. Two copies of the field for each method in the class. Correct Answer: c Question 13 ----------- What happens when calling \`System.out.println(account)\` where \`account\` is a BankAccount object? - a\. A runtime error will occur. - b\. The method will display unreadable binary data on the screen. - c\. The \`BankAccount\` object\'s \`toString\` method will be implicitly called. - d\. A compiler error will occur. Correct Answer: c Question 14 ----------- What happens if the \`this\` variable is not the first statement in a constructor? - a\. A compiler error will result if it is not the first statement of the constructor. - b\. A compiler error will result if it is the first statement of the constructor. - c\. Nothing will happen. - d\. The \`this\` variable cannot be used as a constructor call. Correct Answer: a Question 15 ----------- When is polymorphism handled? - a\. Execution - b\. Compilation - c\. Programming - d\. Debugging Correct Answer: a Question 16 ----------- What does the binary search algorithm do? - a\. Is less efficient than the sequential search algorithm. - b\. Will cut the portion of the array being searched in half each time it fails to locate the search value. - c\. Will have a maximum number of comparisons equal to the number of elements in the array. - d\. Will normally have the number of comparisons that is half the number of elements in the array. Correct Answer: b Question 17 ----------- Which of the following is a valid declaration for a ragged array with five rows but no columns? - a\. \`int\[\]\[\] ragged = new int\[5\];\` - b\. \`int\[\]\[\] ragged = new int\[\]\[5\];\` - c\. \`int\[\]\[\] ragged = new int\[5\]\[\];\` - d\. \`int\[\] ragged = new int\[5\];\` Correct Answer: c Question 18 ----------- What will happen when executing the given code with array initialization? - a\. A runtime error will occur. - b\. All the values in the array will be initialized to 10.0. - c\. All the values in the array except the first will be set to 10.0. - d\. The code contains a syntax error and will not compile. Correct Answer: d Question 19 ----------- What will the value variable contain after the given code is executed? - a\. The average of all the values in the \`numbers\` array. - b\. The sum of all the values in the \`numbers\` array. - c\. The lowest value in the \`numbers\` array. - d\. The highest value in the \`numbers\` array. Correct Answer: c Question 20 ----------- Which of the following for-loops is valid given \`String\[\] names = {\"abc\", \"def\", \"ghi\", \"jkl\"};\`? - a\. \`System.out.println(names\[i\].length);\` - b\. \`System.out.println(names\[i\].length);\` - c\. \`System.out.println(names\[i\].length());\` - d\. \`System.out.println(names\[i\].length());\` Correct Answer: c Quizlet-style Flashcards: Questions 21-30 ========================================= Question 21 ----------- The code that might throw an exception must be enclosed in a \_\_\_\_. - a\. throws block - b\. catch block - c\. try block - d\. finally block Correct Answer: c Question 22 ----------- What is \`e\` in the catch block below? - a\. The type of the exception being caught. - b\. The name of the catch block\'s exception parameter. - c\. A finally block. - d\. An exception handler. Correct Answer: b Question 23 ----------- What is an uncaught exception? - a\. A possible exception that never occurs during execution. - b\. An exception that occurs for which the matching catch clause is empty. - c\. An exception that occurs for which there are no matching catch clauses. - d\. Another term for a thrown exception. Correct Answer: c Question 24 ----------- What does the \`throws\` clause of a method specify? - a\. Specifies the exceptions a method catches. - b\. Specifies the exceptions thrown by the calling method. - c\. Specifies the exceptions a method throws. - d\. Specifies the exceptions a method throws and catches. Correct Answer: c Question 25 ----------- Which of the following exceptions is a checked exception? - a\. ArithmeticException - b\. IOException - c\. RuntimeException - d\. InputMismatchException Correct Answer: b Question 26 ----------- Which of the following statements is true about the \`throw\` statement? - a\. The \`throw\` statement is used to throw an exception. - b\. The \`throw\` statement is used to specify that a method will throw an exception. - c\. The \`throw\` statement is used to access an exception parameter. - d\. All of the above. Correct Answer: a Question 27 ----------- Which of the following classes is not used for file input? - a\. FileInputStream - b\. FileReader - c\. ObjectInputStream - d\. Formatter Correct Answer: d Question 28 ----------- What do \`setIn\`, \`setOut\`, and \`setErr\` methods do? - a\. They output data to the standard input, output, and error streams. - b\. They provide the only way to access the standard input, output, and error streams. - c\. They redirect the standard input, output, and error streams. - d\. They empty the standard input, output, and error streams. Correct Answer: c Question 29 ----------- A(n) \_\_ path starts from the directory in which the application began executing. - a\. Absolute - b\. Relative - c\. Parallel - d\. Comparative Correct Answer: b Question 30 ----------- The static method \`isDirectory\` receives a Path and returns \_\_\_\_. - a\. A boolean indicating if the path is a directory. - b\. A boolean indicating whether the file exists. - c\. A boolean indicating if the file is executable. - d\. A boolean indicating if the file is readable. Correct Answer: a Quizlet-style Flashcards: Questions 31-40 ========================================= Question 31 ----------- What does \`Scanner scanner = new Scanner(Paths.get(\"test.txt\"));\` do? - a\. Opens a binary file for input. - b\. Opens a binary file for output. - c\. Opens a text file for input. - d\. Opens a text file for output. Correct Answer: c Question 32 ----------- What is a serialized object? - a\. An object represented by XML that includes the object\'s data. - b\. An object in memory that has been recreated from data in a file. - c\. A standard output stream object used to convert objects in code to data in a file. - d\. None of the above. Correct Answer: b Question 33 ----------- Which method serializes objects as XML in JAXB? - a\. \`toXML\` - b\. \`serialize\` - c\. \`marshal\` - d\. None of the above. Correct Answer: c Question 34 ----------- Which method displays a dialog box to gather input? - a\. \`showMessageDialog\` - b\. \`getInput\` - c\. \`inputDialog\` - d\. \`showInputDialog\` Correct Answer: d Question 35 ----------- What provides the basic attributes and behaviors of a window? - a\. \`JLabel\` - b\. \`JFrame\` - c\. \`JSwing\` - d\. \`JWindowControl\` Correct Answer: b Question 36 ----------- Which method adds a \`JLabel\` to a \`JFrame\`? - a\. \`attach\` - b\. \`contain\` - c\. \`append\` - d\. \`add\` Correct Answer: d Question 37 ----------- Which \`JFrame\` constant indicates that the program should terminate when the window is closed by the user? - a\. \`TERMINATE\_ON\_CLOSE\` - b\. \`IMMEDIATELY\_CLOSE\` - c\. \`EXIT\_ON\_CLOSE\` - d\. All of the above Correct Answer: c Question 38 ----------- Which of the following most completely describes the steps for setting up event handling for a GUI component? - a\. Create a class that represents the event handler, attach the \`JFrame\` to a \`JWindow\` object and register the event handler. - b\. Implement an appropriate event-listener interface and register the event handler. - c\. Create a class that represents the event handler and implement an appropriate event-listener interface. - d\. Create a class that represents the event handler, implement an appropriate event-listener interface, and register the event handler. Correct Answer: d Question 39 ----------- When the user presses Enter in a \`JPasswordField\`, the GUI component generates an \_\_\_\_, which is processed by an object that implements the interface \_\_\_\_. - a\. \`ActionEvent\`, \`ActionListener\` - b\. \`ActionEvent\`, \`ActionEventListener\` - c\. \`TextEvent\`, \`TextListener\` - d\. \`TextEvent\`, \`TextEventListener\` Correct Answer: a Question 40 ----------- A \`JRadioButton\` is different from a \`JCheckBox\` in that \_\_\_\_. - a\. A \`JRadioButton\` is a subclass of \`JToggleButton\`, \`JCheckBox\` is not. - b\. Normally several \`JRadioButtons\` are grouped together and are mutually exclusive. - c\. A \`JRadioButton\` is a type of button, \`JCheckBox\` is not. - d\. A \`JRadioButton\` is a state button, \`JCheckBox\` is not. Correct Answer: b