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| Frage | Antworten |
| What is dynamic memory allocation? | Dynamic memory allocation is used to create variables or instances on the heap, at run-time. |
| In Dynamic Memory Allocation, the new and delete keywords are used but is it a good idea to use them? | No, as new and delete is a keyword that is commonly used but the danger of using new and delete is that the system cannot check the memory allocation of new and delete. |
| What are virtual functions? | Virtual function is a function that can be overwritten within a inherited class by a function with the same signature |
| What is upcasting? | Upcasting is an automatic type of conversion in C++ from the derived class into a base class type. It implements the prinple of object compatibility. It happens when the instance of a derived class is used where an instance of the base class in executable. |
| If instance x of X knows about instance y of Y, is x a private data class member? | No, because making x a private data class member will not allow y know the existence of x |
| Does this code work: void showDate(const Date& d) const { cout << d.getDay() << " " << d.getMonth() << " " << d.getYear(); } | No unless const is remove after showDate() |
| Which is called first? trl.deleteGivenTransaction(trl.getLastTransactionForDate(d)); | trl.getLastTransactionForDate(d) Note the brackets! |
| What is this Pair defined as? template <typename T1, typename T2> | Class Templete |
| Does this code call a copy constructor? Pair<int, int> x(12, 3); | No |
| Assuming that all the parameters are set up correctly, does this code work? ca.updateBalance(12.0) | No because although the the paramiters are correct, it doesn't take in a literal value |
| In what class is Abstraction is only designed to be used in? | Abstract class is only designed to be used in the base class. |
| If im making a abstract class, what must my function be? | Abstract class must be a pure virtual function! |
| What kind of relationship would the following be: Player* player = p_player; | Direct Association |
| When is Dynamic Binding obtained? | It is obtained when a virtual function is called |
| What does a base class and derived class look like in Dynamic Binding? | Base Class: class BankAccount{ //... }; Derived Class: class CurrentAccount : public BankAccount { //... }; |
| True or False: In class derivation, Static binding is a mechanism that allows the compiler to decide which (version of the) code to invoke for a member function depending on the type of the handle? | True |
| In Abstract Base Classes, what keyword is needed to make a class abstract? | Virtual (this will become a pure virtual function) |
| What is a singleton class? | A singleton class whole number of instances that can be instantiated is limited to one is called a singleton class. Only 1 instance can exist - no more! |
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