All classes implement an abstract data type. - ANSWERFalse
In a single statement, define and initialize a reference variable for an ArrayList named frameScores that stores items of type Integer. - ANSWERArrayList frameScores = new ArrayList();
Given: ArrayList itemsList = new ArrayList(); Wha...
All classes implement an abstract data type. - ANSWERFalse
In a single statement, define and initialize a reference variable for an ArrayList named frameScores
that stores items of type Integer. - ANSWERArrayList frameScores = new ArrayList();
Given: ArrayList itemsList = new ArrayList(); What is the initial size of the ArrayList? - ANSWER0; Zero
The _________ operator is used to explicitly allocate an object. - ANSWERnew
Given: Employee clerk1 = new Employee() ;. clerk1 refer to an object. - ANSWERTrue
Define a private field named salary of type int for Employee class: - ANSWERprivate int salary;
Which of the following commands is used to run a java program? - ANSWERjava
The constructor has the same name as the class. The constructor method has no return type, not
even void. - ANSWERTrue
Class Dwelling has data members door1, door2, door3. A class House is derived from Dwelling and
has data members wVal, xVal, yVal, zVal. The definition and initialization House h = new House();
creates how many data members? - ANSWER7; seven
Using a JFormattedTextField variable named numItersField, write a statement that creates a
JFormattedTextField that uses a NumberFormat to display integers. - ANSWERnumItersField = new
JFormattedTextField(NumberFormat.getIntegerInstance());
The block tag specification below creates a reference to ElapsedTime's printTime() method. @see
ElapsedTime#printTime() - ANSWERTrue
,Given a JFrame variable named frame and a JTextField variable named nameField, write a statement
that adds nameField to the frame. - ANSWERframe.add(nameField);
Assume an empty JFrame object named appFrame. The program called the setVisible() method
correctly (i.e., appFrame.setVisible(true);), but the frame is not visible on the screen. The frame
should be 500 pixels wide and 300 pixels tall. - ANSWERappFrame.setSize(500, 300);
Which of the following is NOT a characteristics of Object Oriented Programming? -
ANSWERrevolution
Using the GridBagConstraints variable named layoutConstraints, write a statement that would add 5
pixels of padding to the left and right of a GUI component. The top and bottom edges of the
component should not have padding. - ANSWERlayoutConstraints.insets = new Insets(0, 5, 0, 5);
Given the JTextField variable named weeklyHoursField, write a statement that makes
weeklyHoursField editable by users. - ANSWERweeklyHoursField.setEditable(true);
A private helper method may not call another private helper method. - ANSWERFalse
Which access modifier allows a class be used by every class in the program regardless of the package
in which either is defined? - ANSWERpublic
Suppose your program uses an object called Student. Which of the following shall NOT be part of the
Student object? - ANSWERgetPrice()
By default, the equals() method tests the equality of the contents of two Objects , not the equality of
their references. - ANSWERFalse
Suppose that public Student(String name, String id){// code} is the only constructor the Student class
has. Which of the following is correct? - ANSWERStudent s = new Student(â Tomâ , â 1234â );
A derived class may define a member method having the same name as the base class. Such a
member method _______________ the method of the base class. - ANSWERoverrides
Suppose that we have the following code. Student s1 = new Student(); Student s2; Which of the
following is true after the above two line of code are executed? - ANSWERs1 refers to valid object
, Instances of primitive wrapper classes, such as Integer and Double, and the String class are defined
as immutable, meaning that a programmer cannot modify the object's contents after initialization;
new objects must be created instead. - ANSWERTrue
A mutator should not change a class' private data. - ANSWERFalse
The process of creating and running a program that tests a specific item (or "unit"), such as a method
or a class, is known as ________ testing. - ANSWERunit
In Student class, there is a field double gpa; and a method void setGpa(double gpa); In main()
function, given variable definition Student s = new Student(); which of the following code set the sâ
gap to be 3.5? - ANSWERs.setGpa(3.5);
There is exactly one way to decompose a program into classes. - ANSWERFalse
The ____________ data type is a built-in class in Java that augments the int primitive type. -
ANSWERInteger
Write a statement that assigns the double representation of the value held by the Integer objects
numElements to a double variable named calcSize. - ANSWERcalcSize = numElements.doubleValue();
Each item in array is directly accessible - ANSWERTrue
Given array firstList with size 4 and element values, 33, 44, 55, 66, and array secondList with size 4
and elements values 0, 0, 0, 0. Consider loop for (i = 0; i < 4;
++i) { secondList[i] = firstList[i];}. After execution of the above loop, code secondList[2] = 100; will
modify firstList[2] to be 100 too. - ANSWERFalse
What is the index of the last element in an array? - ANSWERThe size of the array minus one.
A continue statement in a loop causes an immediate exit of the loop. - ANSWERFalse
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