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C# Programming - Classes and Objects

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Exercise :: Classes and Objects - General Questions

  • Classes and Objects - General Questions
1. 

Which of the following statements is correct about the C#.NET code snippet given below? 

class Student s1, s2; // Here 'Student' is a user-defined class.
s1 = new Student(); 
s2 = new Student();
A. Contents of s1 and s2 will be exactly same.
B. The two objects will get created on the stack.
C. Contents of the two objects created will be exactly same.
D. The two objects will always be created in adjacent memory locations.
E. We should use delete() to delete the two objects from memory.

Answer: Option C

Explanation:

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2. 

Which of the following statements is correct about the C#.NET code snippet given below? 

class Sample
{
    private int i;
    public Single j;
    private void DisplayData()
    {
        Console.WriteLine(i + " " + j);
    }
    public void ShowData()
    {
        Console.WriteLine(i + " " + j);
    }
}
A. j cannot be declared as public.
B. DisplayData() cannot be declared as private.
C. DisplayData() cannot access j.
D. ShowData() cannot access to i.
E. There is no error in this class.

Answer: Option E

Explanation:

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3. 

Which of the following statements are correct?

  1. Instance members of a class can be accessed only through an object of that class.
  2. A class can contain only instance data and instance member function.
  3. All objects created from a class will occupy equal number of bytes in memory.
  4. A class can contain Friend functions.
  5. A class is a blueprint or a template according to which objects are created.

A. 1, 3, 5
B. 2, 4
C. 3, 5
D. 2, 4, 5
E. None of these

Answer: Option A

Explanation:

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4. 

Which of the following statements is correct?
A. Procedural Programming paradigm is different than structured programming paradigm.
B. Object Oriented Programming paradigm stresses on dividing the logic into smaller parts and writing procedures for each part.
C. Classes and objects are corner stones of structured programming paradigm.
D. Object Oriented Programming paradigm gives equal importance to data and the procedures that work on the data.
E. C#.NET is a structured programming language.

Answer: Option D

Explanation:

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5. 

Which of the following is the correct way to create an object of the class Sample?

  1. Sample s = new Sample();
  2. Sample s;
  3. Sample s; s = new Sample();
  4. s = new Sample();

A. 1, 3
B. 2, 4
C. 1, 2, 3
D. 1, 4
E. None of these

Answer: Option A

Explanation:

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