700+ câu trắc nghiệm Ngôn ngữ lập trình C có đáp án - Phần 19

A. 21,21

B. 20,21

C. 21,22

D. compile error

A. 100

B. 101

C. none

D. compile error

A. Encapsulation

B. Information Hiding

C. Data abstraction

D. All of the above

A. all of above

B. (i)

C. (i), (iii)

A. friend

B. inline

C. static

D. virtual

A. Information hiding

B. Inheritance

C. Redefinition

D. Overloading

A. The appropriate redefined version of the function will be used

B. The base-class version of the function will always be used

C. The outcome is unpredictable

D. A run-time error will occur

A. A const member

B. A reference parameter

C. A static member

D. A function member

A. An abstract class that is at the top of the inheritance hierarchy.

B. A class with a pure virtual function in it.

C. A class that inherits from another class

D. A class that is inherited by another class, and thus is included in that class.

A. Is visible only in the subclasses (and not in the class it is declared in)

B. Is visible only in the class it is declared in

C. Is visible to all classes, but modifiable only in the class where it is declared

D. Is visible in the class it is declared in, and all of its sub-classes

A. A function called when an instance of a class is initialized

B. A function that is called when an instance of a class is deleted

C. A special function to change the value of dynamically allocated memory

D. A function that is called in order to change the value of a variable

A. The public members of the base class become public

B. The public members of the base class become protected

C. The protected members of the base class become private

D. The public members of the base class become inaccessible

A. Each instance of a class will have its own copy of the variable

B. Changing the variable in one instance will have no effect on other instances of the class

C. Changing the variable in one instance will have no effect on other instances of the class

D. Every instance of the class must consider the value of the static variable before initializing

B. To copy one object to another existing object

A. Have wine and cheese with that other friend

B. Allow that class to declare an instance of it in its list of private variables

C. Allow the other class (the one declared as friend) to access to the declaring class’s private variables

D. Allow the class declaring the other as a friend to access the declared class’s private variables

A. constructors

B. destructors

C. static functions

D. None of the above

A. In the catch block

B. In the throw clause

C. In the constructor of a class

D. Only when memory allocation fails

A. can be used without an instantiation of an object

B. can only access static data

C. Both 1 and 2 are correct

D. Neither 1 nor 2 are correct

A. The class must not have method

B. The class must have a constructor that takes no arguments

C. The class must have a function definition equal to zero

D. The class may only exist during the planning phase

A. 1

B. 2

C. 3

D. error

A. i1=2 i2=2

B. i1=2 i2=3

C. i1=3 i2=2

D. Error

A. only a and b

B. a,b and c

C. only a

D. error

A. 0

B. 5

C. 6

D. 7

A. There is nothing wrong

B. One cannot have a ‘Base’ pointer to ‘Derived’ since it is not derived publicly

C. One need a derived class pointer to point to a derived class

D. One required to code a constructor for Derived

A. professor researcher teacher myprofessor

B. researcher professor teacher myprofessor

C. myprofessor teacher researcher professor

D. myprofessor researcher professor teacher