Midtem Exam Oracle Java Fundamental

Java Fundamental Midterm Exam

Section 2

                (Answer all questions in this section)

1.            Which of the following is not a type of event listener in Alice?    Mark for Review

(1) Points

                Keyboard

                Scene Activation/Time

                Mouse

                Position/Orientation

                Cursor (*)

2.            In Alice, what tab would you choose to start a new animation with a pre-populated world?          Mark for Review

(1) Points

                Blank Slate

                Starters (*)

                Recent

                My Projects

3.            In Alice, you can access the Java on the side option through which menu option?              Mark for Review

(1) Points

                Window (*)

                Project

                Run

                Edit

4.            From your Alice lessons, variables are fixed and cannot be changed. True or false?           Mark for Review

(1) Points

                True

                False (*)

5.            You have a Class representing Cat. A cat can meow, purr, catch mice, and so on. When you create a new cat, what is it called?               Mark for Review

(1) Points

                A subprogram

                A submethod

                A subclass

                A variable class

                An instance (*)

Section 2

                (Answer all questions in this section)

6.            Which of the following statements about methods is false?         Mark for Review

(1) Points

                Classes must be defined directly within a method definition. (*)

                Methods whose return type is not void are required to include a return statement specifying what to return.

                The order in which methods are listed within the class is not important.

                Java does not permit nesting one method definition within another method's definition.

7.            In Alice, the use of conditional control structures allows what two types of loops?            Mark for Review

(1) Points

                                                (Choose all correct answers)      

                conditional (*)

                together

                infinite

                switch

8.            From your Alice lessons, where on an object do an object's axes intersect?         Mark for Review

(1) Points

                At the object's head

                At the object's bottom

                At the object's chest

                At the object's center point (*)

9.            Which of the following are examples of elements you would test in your Alice animation?            Mark for Review

(1) Points

                                                (Choose all correct answers)      

                Math expressions calculate as expected. (*)

                All of the procedures display in alphabetical order in the Procedures tab.

                Event listeners trigger the correct responses. (*)

                Objects move with smooth timing. (*)

10.          What type of Alice listener object is required to target a mouse-click on any object in the scene, allowing the user to drag that object around the scene when the animation is running?           Mark for Review

(1) Points

                addMouseListener procedure

                addListener procedure

                addDefaultManipulation procedure

                addDefaultModelManipulation procedure (*)

Section 2

                (Answer all questions in this section)

11.          In Alice, which of the following arguments could be replaced with a random number?    Mark for Review

(1) Points

                                                (Choose all correct answers)      

                Direction

                Duration (*)

                Distance (*)

                Object name

                Procedure name

12.          Alice uses built-in math operators. They are:       Mark for Review

(1) Points

                Add

                Subtract

                Multiply

                Divide

                All of the above (*)

13.          In Alice, which of the following programming statements moves the butterfly forward, double the distance to the tree?        Mark for Review

(1) Points

                this.Butterfly move backward {this.Butterfly getDistanceTo this.Tree * 2}

                this.Butterfly move forward {this.Butterfly getDistanceTo this.Tree / 2}

                this.Butterfly move forward {this.Butterfly getDistanceTo this.Tree * 2} (*)

                this.Butterfly move backward {this.Butterfly getDistanceTo this.Tree / 2}

14.          In Alice, which function is used to move an object directly to the center point of another object?              Mark for Review

(1) Points

                getDuration

                getDistance (*)

                getDepth

                getObject

15.          When you disable a programming instruction, it is still executed when you run the Alice animation. True or false?    Mark for Review

(1) Points

                True

                False (*)

Section 2

                (Answer all questions in this section)

16.          In Alice, Do In Order and Do Together:   Mark for Review

(1) Points

                Are move statements

                Are control statements (*)

                Are complex statements

                None of the above

17.          In Alice, the procedures' arguments allow the programmer to adjust the object, motion, distance amount, and time duration. True or false?              Mark for Review

(1) Points

                True (*)

                False

18.          In Alice, a walking motion for a bipedal object can be achieved without the Do Together control statement. True or false?    Mark for Review

(1) Points

                True

                False (*)

19.          In Alice, what are the forms of a scenario?           Mark for Review

(1) Points

                                                (Choose all correct answers)      

                A task to perform. (*)

                A person to help.

                A problem to solve. (*)

                A section of code to write.

                A system to start.

20.          In Alice, when a new procedure is declared, all subclasses of the superclass will inherit the procedure. True or false?               Mark for Review

(1) Points

                True (*)

                False

Section 2

                (Answer all questions in this section)

21.          Procedural abstraction may need to be implemented if an object in Alice needs to perform an action, but there isn't an inherited procedure that accomplishes that action. True or false? Mark for Review

(1) Points

                True (*)

                False

22.          The list below describes variables. All are correct except which one?       Mark for Review

(1) Points

                Has a type associated with it.

                Has a unique name.

                A place in memory where data of a specific type can be stored for later retrieval and use.

                Arranged in rows and columns. (*)

23.          The list below displays valid primitive types in Java, except which one?  Mark for Review

(1) Points

                String (*)

                int

                double

                long

                boolean

24.          Alice 3 will periodically remind you to save your project. True or false?   Mark for Review

(1) Points

                True

                False (*)

Section 3

                (Answer all questions in this section)

25.          In Greenfoot, which of the following methods return the world that the instance lives in?            Mark for Review

(1) Points

                World getWorld() (*)

                World getClass()

                getXY()

                getRotation()

Section 3

                (Answer all questions in this section)

26.          From your Greenfoot lessons, in an if-statement, the programming statements written in curly brackets are executed simultaneously. True or false?               Mark for Review

(1) Points

                True

                False (*)

27.          In Greenfoot you can only access the methods of the current class?        Mark for Review

(1) Points

                True

                False (*)

28.          In the Greenfoot IDE, what does the AND operator (&&) do?     Mark for Review

(1) Points

                Compares two boolean values, and returns a boolean value which is true if and only if one of its operands are true.

                Compares two boolean values, and returns a boolean value which is true if and only if both of its operands are true. (*)

                Compares two boolean values and returns a boolean value which is true if either one of the operands is true.

                Compares two boolean variables or expressions and returns a result that is true if either of its operands are true.

29.          In Greenfoot, which of the following statements could prevent an infinite loop from occurring?                Mark for Review

(1) Points

                I = 100 + i

                i = i + 1 (*)

                i = i

                i=1

30.          In Greenfoot, a local variable is declared at the beginning of a class. True or false?            Mark for Review

(1) Points

                True

                False (*)

Section 3

                (Answer all questions in this section)

31.          In Greenfoot, what types of values cannot be stored in a local variable?                Mark for Review

(1) Points

                Method (*)

                Integers

                Objects

                Class name

                World name

32.          Which of the following type of audience should you ask to play your Greenfoot game during the testing phase? Mark for Review

(1) Points

                Testing

                Programmer

                Target (*)

                Primary

33.          In object oriented programming, programmers analyze a problem and create objects to solve the problem. True or false?    Mark for Review

(1) Points

                True (*)

                False

34.          Which one of the following can be used to detect when 2 actors collide?               Mark for Review

(1) Points

                isCollision()

                hasCollided()

                isContact()

                isTouching() (*)

35.          In Greenfoot, a way to have all subclasses of a superclass inherit a method is by adding the method to the superclass. True or false?             Mark for Review

(1) Points

                True (*)

                False

Section 3

                (Answer all questions in this section)

36.          What type of parameter does the Greenfoot playSound method expect?            Mark for Review

(1) Points

                name of a keyboard key (as String)

                name of a sound file (as String) (*)

                name of the class (as String)

                name of an integer (as int)

37.          Greenfoot has tools to record sound. True or false?        Mark for Review

(1) Points

                True (*)

                False

38.          Which of the following answers have the correct syntax for declaring a class variable in Greenfoot?         Mark for Review

(1) Points

                                                (Choose all correct answers)      

                public variable-name variable type;

                public variable-type variable-name; (*)

                private variable-name, variable-type;

                private variable-type variable-name; (*)

39.          In Greenfoot, which method is used to add a new instance to a scenario when the world is initialized?   Mark for Review

(1) Points

                addObject (*)

                addClass

                addWorld

                addInstance

40.          Constructors are called automatically when a new intance of a class is created? True or false?     Mark for Review

(1) Points

                True (*)

                False

41.          In Greenfoot, the instance has a source code editor. True or false?          Mark for Review

(1) Points

                True

                False (*)

42.          In Greenfoot, the move method expects what type of information in its parameters?    Mark for Review

(1) Points

                Integer of steps to move forward (*)

                Degrees to turn

                String statement

                True or false response

43.          Using the Greenfoot IDE, only five instances can be added to a scenario. True or false?  Mark for Review

(1) Points

                True

                False (*)

44.          In Greenfoot, the body of the method is located in between which of the following characters?               Mark for Review

(1) Points

                Curly brackets { } (*)

                Square brackets [ ]

                Asterisks **

                Parnetheses ( )

45.          In Greenfoot, a subclass is a specialization of a superclass. True or false?               Mark for Review

(1) Points

                True (*)

                False

Section 3

                (Answer all questions in this section)

46.          In Greenfoot, the Run button repeatedly executes all of the programming statements in the class's act method in sequential order until the pause button is clicked. True or false?         Mark for Review

(1) Points

                True (*)

                False

47.          From your Greenfoot lessons, what can methods belong to?      Mark for Review

(1) Points

                                                (Choose all correct answers)      

                Galleries

                Classes (*)

                Scenarios

                Objects (*)

                All of the above

48.          In Greenfoot, the origin of the world coordinate system (0,0) starts in the center of the world. True or false?                Mark for Review

(1) Points

                True

                False (*)

49.          The first step to executing an if-else statement is to:____________.     Mark for Review

(1) Points

                Execute the else statement

                Evaluate the class

                Execute the if statement

                Evaluate the condition (*)

50.          An if-else statement executes its first code block if a condition is true, and its second code block if a condition is false, but not both. True or false?    Mark for Review

(1) Points

                True (*)

                False