Question 1 : Which of the following statements is correct?
1. Only one object can be created from an abstract class.
2. By default methods are virtual.
3. If a derived class does not provide its own version of virtual method then the one in the base class is used.
4. If the method in the derived class is not preceded by override keywords, the compiler will issue a warning and the method will behave as if the overri
5. Each derived class does not have its own version of a virtual method.
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Question 2 : In order for an instance of a derived class to completely take over a class member from a base class, the base class has to declare that member as
1. new
2. base
3. virtual
4. overrides
5. overloads
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Question 3 : Which of the following modifier is used when a virtual method is redefined by a derived class?
1. overloads
2. override
3. overridable
4. virtual
5. base
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Question 4 : Which of the following statements is correct?
1. The conditional logical operators cannot be overloaded.
2. When a binary operator is overloaded the corresponding assignment operator, if any, must be explicitly overloaded.
3. We can use the default equality operator in an overloaded implementation of the equality operator.
4. A public or nested public reference type does not overload the equality operator.
5. The array indexing operator can be overloaded.
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Question 5 : Which of the following statements is correct?
1. Static methods can be a virtual method.
2. Abstract methods can be a virtual method.
3. It is necessary to override a virtual method.
4. When overriding a method, the names and type signatures of the override method must be the same as the virtual method that is being overriden.
5. We can override virtual as well as non-virtual methods.
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Question 6 : Which of the followings is the correct way to overload + operator?
1. public sample operator + ( sample a, sample b )
2. public abstract operator + ( sample a, sample b)
3. public abstract sample operator + (sample a, sample b )
4. public static sample operator + ( sample a, sample b )
5. All of the above
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Question 7 : Which of the following keyword is used to overload user-defined types by defining static member functions?
1. op
2. opoverload
3. operator
4. operatoroverload
5. operatoroverload
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Question 8 : Which of the following statements is correct?
1. When used as a modifier, the new keyword explicitly hides a member inherited from a base class.
2. Operator overloading works in different ways for structures and classes.
3. It is not necessary that all operator overloads are static methods of the class.
4. The cast operator can be overloaded.
5. All of the above
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Question 9 : Which of the following keyword is used to change the data and behavior of a base class by replacing a member of a base class with a new derived member?
1. new
2. base
3. overloads
4. override
5. overridable
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Question 10 : A derived class can stop virtual inheritance by declaring an override as
1. inherits
2. extends
3. inheritable
4. not inheritable
5. sealed
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