Podcast
Questions and Answers
What is the primary characteristic of a default constructor?
What is the primary characteristic of a default constructor?
- It initializes all fields with specific values provided by the user.
- It can only be used within an internal class.
- It is parameterless and sets fields to default values. (correct)
- It is parameterized and requires at least one argument.
Which statement correctly describes the visibility of a default constructor based on class type?
Which statement correctly describes the visibility of a default constructor based on class type?
- It can be set to internal visibility only in internal classes.
- It will be private if the class is private and public if the class is public. (correct)
- It is always public irrespective of the class type.
- It can be private only if the class is declared as abstract.
What happens to numeric fields in a class when a default constructor is called?
What happens to numeric fields in a class when a default constructor is called?
- They are converted to strings.
- They retain their last known values.
- They are initialized to 0. (correct)
- They are set to their maximum values.
What is the significance of a method having a return type of void?
What is the significance of a method having a return type of void?
Which of the following statements about default values set by a default constructor is accurate?
Which of the following statements about default values set by a default constructor is accurate?
What prevents falling through a switch case in C#?
What prevents falling through a switch case in C#?
In C#, what does the default keyword do in the context of method parameters?
In C#, what does the default keyword do in the context of method parameters?
Which of the following correctly describes a 'case' in a switch statement in C#?
Which of the following correctly describes a 'case' in a switch statement in C#?
What component encompasses everything in the curly braces of a method in C#?
What component encompasses everything in the curly braces of a method in C#?
Which statement about the keyword 'end' in C# is correct?
Which statement about the keyword 'end' in C# is correct?
What is a constructor primarily used for in object-oriented programming?
What is a constructor primarily used for in object-oriented programming?
What happens when no default value is set for a parameter in a method?
What happens when no default value is set for a parameter in a method?
In the context of collections in C#, which statement is true?
In the context of collections in C#, which statement is true?
Which of the following must be identical when overriding a method in a derived class?
Which of the following must be identical when overriding a method in a derived class?
What access level should be used for members to ensure they are accessible only to the class methods and its child classes?
What access level should be used for members to ensure they are accessible only to the class methods and its child classes?
What is a key distinction between abstract classes and interfaces in C#?
What is a key distinction between abstract classes and interfaces in C#?
In method overriding, which of these are NOT required to be the same as the parent class's method?
In method overriding, which of these are NOT required to be the same as the parent class's method?
When defining an abstract class in C#, what must it contain?
When defining an abstract class in C#, what must it contain?
What is NOT a requirement for a method in a derived class to correctly override a virtual method?
What is NOT a requirement for a method in a derived class to correctly override a virtual method?
Which statement is true regarding method overriding in C#?
Which statement is true regarding method overriding in C#?
Which option describes an abstract method correctly?
Which option describes an abstract method correctly?
Flashcards are hidden until you start studying
Study Notes
Default Constructors
- Default constructors are parameterless.
- They set numeric fields to 0.
- They set boolean fields to false.
- They set character fields to Unicode 0.
- They set string fields to null.
- They set object fields to null.
- Default constructors are public when the class is public.
- Default constructors are private when the class is private.
- Default constructors are protected when the class is abstract.
- Default constructors are internal when the class is internal.
Method Return Types
- A method with a return type of void cannot return anything.
Valid Identifiers
- _age is a valid identifier.
- age is a valid identifier.
- age_ is a valid identifier.
Switch Statements
- The break keyword prevents falling through a switch case.
- The break statement stops execution from falling through to the next matching case expressions.
- The default keyword executes a sequence of statements when the switch expressions do not match any of the case statements.
- The default keyword sets the default of a parameter to a default value when no value is passed.
- The case keyword represents a value that the switch expression could match.
Method Body
- In C#, the body of a method is everything between the curly braces.
Overridden Methods
- Overridden methods in child classes must have the same name, return type, visibility & parameter list as the method in the parent class.
Methods in Child Classes
- Methods in child classes can be accessed by the same class and any child classes.
Abstract Classes and Interfaces
- Abstract classes can contain both abstract and non-abstract methods.
- Interfaces can only contain abstract methods.
- Neither abstract classes nor interfaces can be instantiated in C#.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
