C++ Programming (2)

Question 1

What are preprocessor directives?

Answer 1

Question 2

How can preprocessor directives be used to prevent multiple inclusion of the same header file?

Answer 2

Question 3

what is the syntax of the #define preprocessor directive? What does it do? What are some other preprocessor directives?

Answer 3

Question 4

What are namespaces? What is the syntax for declaring a namespace?

Answer 4

Question 5

Example of defining a namespace. How are things within a namespace accessed?

Answer 5

Question 6

How do we declare what default namespace we are using?

Answer 6

Question 7

Should you include the ‘using namespace …’ syntax in a header file? Why?

Answer 7

Question 8

What is the standard library for input and output in C++? What are two commonly used output stream objects in C++? Common input stream?

Answer 8

Question 9

Are the standard inout and output functions from C also available in C++?

Answer 9

Question 10

Are C++ I/O operators performed by functions or operators?

Answer 10

Question 11

What are the insertion / extraction operators? What is the only thing you can put on the right of the extraction symbol?

Answer 11

Question 12

Insertion and Extraction example:

Answer 12

Question 13

What happens with the extraction operator when erroneous data is passed?

Answer 13

Question 14

When using the extraction operator to read input characters into a string variable, how are leading whitespace characters treated?

Answer 14

Question 15

Limitations of Extraction example:

Answer 15

Question 16

How can we parse a line and extract the type / date from it?

Answer 16

Question 17

How can we read from/write to files? What is the library called?

Answer 17

Question 18

What work is generally done with files in C++?

Answer 18

Question 19

Classes are an expanded concept of ___.
Classes contain what?
What is an object?

How are classes defined?

Answer 19

Question 20

What are the different components of a class definition?

Answer 20

Question 21

What is the general format of having a main C++ file, a C++ class file, and a C++ header? Where would you put the ‘using namespace’ line?

Answer 21

Question 22

How do you compile all C++ files to create an executable?

Answer 22

Question 23

What are access specifiers? What is the difference between private, public, and protected?

Answer 23

Question 24

Access specifiers example:

Answer 24

Question 25

How are objects created? Is an object created when a variable pointing to a class type is created?

Answer 25

Question 26

How do you create an object with a pointer variable? What are the steps within the statement?

Answer 26

Question 27

When are objects created on the stack destroyed? What about objects created dynamically? How are dynamically created object destroyed?

Answer 27

Question 28

What is a constructor? Are they required?

Answer 28

Question 29

What is a copy constructor? What can it be used for?

Answer 29

Question 30

What happens if you do not declare a copy constructor?

Answer 30

Question 31

What is a destructor? When is it called?

Answer 31

Question 32

What is class inheritance? What does it allow us to do? What is a base/superclass? Derived/subclass?

Answer 32

Question 33

How many classes can a class derive itself from? How do we define a derived class?

Answer 33

Question 34

Inheritance example:

Answer 34

Question 35

How does inheritance work alongside access specifiers?

Answer 35

Question 36

Inheritance and access specifiers example:

Answer 36

Question 37

How does inheritance of constructors and destructors work?

Answer 37

Question 38

Inheritance of constructors and destructors example:

Answer 38

Question 39

What is multiple inheritance? How does it work?

Answer 39

Question 40

What is a 'Friend' of a class?

Answer 40

Question 41

What are 'Friend' functions?

Answer 41

Question 42

What are 'Friend' Classes?

Answer 42