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18 Cards in this Set
- Front
- Back
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What is an enum? |
Enum is an enumeration type and represents a list of possible options. |
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What Types Categories are used in C#. |
There are three types * Value Type * Reference Type * Pointers Type |
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When do you need to create a value type? |
* The object is small * The object is logically immutable * There are a lot of objects |
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How is a value type defined? |
Using keyword "struct". |
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What is the difference between struct and classes? |
* Structs cannot declare an empty constructor * Structs cannot be used in an inheritance hierarchy |
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What is overloading? |
Methods that have the same name, but differ in the arguments they take. |
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What is the property of a static field or property? |
A static field or property is shared with all the code that has access to it. |
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What is the role of the constructor? |
* To initialize the type with data * To run some initialization code |
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What high cohesion means? |
A code/ class performs a well defined task. All members and methods are related in performing that task. |
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What low coupling means? |
Low dependence between software modules. |
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What is Single responsibility principle? |
A class should have only one responsibility. |
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What is Open/closed principle? |
An object should be open for extensions, but closed for modifications. |
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What is Liskov substitution principle? |
A base type should be replaceable with sub-types in each and every situation. |
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What is Interface segregation principle? |
Use client-specific interfaces. A user of an interface should not have to implement all kinds of methods that he does not use. |
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What is Dependency Inversion principle? |
Depend upon abstractions, not concrete implementations. |
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What is the difference between a static method and an extension method? |
The extension method uses the special this keyword for the first argument. |
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What methods can be override? |
The public methods marked virtual. |
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How can inheritance be disabled? |
Using sealed keyword on a class or method. |
