Cs 1120 Final

Front 1

A(n) _______ is best used for providing services that bring together disparate objects.

Back 1

interface

Front 2

All methods in an abstract base class must be declared abstract.

Back 2

False

Front 3

Keyword __________ compares two objects to determine if a cast operation would be a success.

Back 3

is

Front 4

Abstract classes are classes which may not be:

Back 4

instantiated

Front 5

Polymorphism involves:

Back 5

the same message sent to a variety of objects.

Front 6

A class inherited from two or more levels up in the hierarchy is known as a

Back 6

indirect base class.

Front 7

Which of the following classes is the root of the class hierarchy?
A. System.Object
B. ToString
C. None of the specified choices.
D. Point

Back 7

A. System.Object

Front 8

Which of the following may result in a compiler error?
A. referring to a base-class object with a base-class reference.
B. referring to a base-class object with a derived-class reference.
C. referring to a derived class object with a base class reference.
D. referring to a derived-class object with a derived-class reference.

Back 8

B. referring to a base-class object with a derived-class reference.

Front 9

A derived class cannot access the ____________ members of its base class.

Back 9

private

Front 10

How can a derived class call a base class constructor?

Back 10

explicitly & implicitly

Front 11

The programmer may define implementations for abstract methods to act as a default.

Back 11

False

Front 12

It is not a compilation error to override a method with a different access modifier.

Back 12

False

Front 13

A derived class can become a base class for another class.

Back 13

True

Front 14

Downcasting is the opposite of upcasting and is a technique of moving an object up the derivation hierarchy.

Back 14

False

Front 15

A derived class can override a base class method. This is done because:

Back 15

Methods are inherited that should not be

Front 16

List, in the proper order, the nine steps of Software Life Cycle (as defined in class).

Back 16

1. Specification
2. Design
3. Risk Analysis
4. Verification
5. Coding
6. Testing
7. Refinement
8. Production
9. Maintenance

Front 17

List at least 3 different types of GUI controls available in the Visual Studio 2008.

Back 17

1. button
2. textbox
3. radiobutton

Front 18

Consider polymorphic behavior. Which statement best describes the relationship between base class and derived class types?

Back 18

A derived class reference can be assigned to a base class variable, but a base class reference cannot be assigned to a derived class variable.

Front 19

The conventional name for an interface to be called Car is:

Back 19

ICar

Front 20

A class that implements an interface but does not declare all of the interface’s methods must be declared:

Back 20

abstract

Front 21

Overloaded operator methods must be declared public and ________.

Back 21

static

Front 22

Which of the following is not included in an exception’s stack trace?

Back 22

Instructions on handling the exception.

Front 23

Data stored in a file is considered:

Back 23

persistent data

Front 24

A stack is a __________ data structure.

Back 24

LIFO

Front 25

A __________ class contains a reference member that refers to an object of the same class type.

Back 25

self-referential

Front 26

Queue nodes are removed only from the __________ of the queue, and are inserted only at the __________ of the queue.

Back 26

head, head