Question 1 Object initializers (which initialize an object and its properties) u

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Question 1

Object initializers (which initialize an object and its properties) use what syntax?

A. new className ( property1 -> value1 , … );
B. new className ( property1 = value1 , … );
C. new className { property1 = value1 , … };
D. className { property1 = value1 , … };

Question 2

The __________ of a class are also called the public services or the public interface of the class.

A. public constructors
B. public instance variables
C. public methods
D. All of the above

Question 3

An instance of a user-defined type is called a(n):

A. class.
B. interface.
C. object.
D. None of the above

Question 4

Object orientation uses classes to:

A. develop algorithms.
B. encapsulate data and methods.
C. organize large amounts of data.
D. None of the above

Question 5

The use of references to objects of preexisting classes as members of new objects is called:

A. inheritance.
B. composition.
C. polymorphism.
D. None of the above

Question 6

A __________ data structure can be described as a "waiting line."

A. stack
B. queue
C. list
D. None of the above

Question 7

A constructor CANNOT:

A. be overloaded.
B. initialize variables to their defaults.
C. specify return types or return values.
D. have the same name as the class.

Question 8

Every class inherits directly or indirectly from class:

A. Inheritor.
B. Base.
C. Super.
D. object.

Question 9

Which statement is FALSE?

A. The compiler always creates a default constructor for a class.
B. If a class has constructors, but none of the public constructors are parameterless, and a program attempts to call a parameterless constructor to initialize an object of the class, a compilation error occurs.
C. A constructor can be called with no arguments only if the class does not have any constructors or if the class has a public parameterless constructor.
D. Parameterless constructors do not have any arguments.

Question 10

An object’s this reference refers to:

A. the object itself.
B. what the programmer specified.
C. the entry point of the program.
D. None of the above

Explanation / Answer

1.Object initializers (which initialize an object and its properties) use what syntax?

Answer: new className ( property1 = value1 , … );

2. The __________ of a class are also called the public services or the public interface of the class.

   Answer:  public instance variables

3. An instance of a user-defined type is called a(n):

Answer:  object.

4. Object orientation uses classes to: encapsulate data and methods, develop algorithms and organize large amounts of data.

5.The use of references to objects of preexisting classes as members of new objects is called: composition.

6.A queue data structure can be described as a "waiting line."

7. A constructor CANNOT: specify return types or return values.

8. Every class inherits directly or indirectly from class: object.

9. Which statement is FALSE?

Answer:  The compiler always creates a default constructor for a class.

10.An object’s this reference refers to:  the object itself.

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