An Employee class has a property called age and emp is reference to a Employee o

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Question
An Employee class has a property called age and emp is reference to a Employee object and we want the statement Console.WriteLine(emp.age) to fail. Which of the following options will ensure this functionality?
Options
A. Declare age property with only get accessor.
B. Declare age property with only set accessor.
C. Declare age property with both get and set accessors.
D. Declare age property with get, set and normal accessors.
E. None of the above

Correct Answer

Declare age property with only set accessor.

Properties problems

Search Results

1. If Sample class has a Length property with get accessor then which of the following statements will work correctly?
Options

Sample m = new Sample(); 
m.Length = 10;

Sample m = new Sample(); 
m.Length = m.Length + 20;

Sample m = new Sample(); 
int l;
l = m.Length;

D.
```
Sample.Length = 20;
```
E.
```
Console.WriteLine(Sample.Length);
```

Discuss

Correct Answer:

Sample m = new Sample(); 
int l;
l = m.Length;

2. Which of the following statements is correct about properties used in C#.NET?
Options
A. A property can simultaneously be read only or write only.
B. A property can be either read only or write only.
C. A write only property will have only get accessor.
D. A write only property will always return a value.

Discuss

3. Which of the following statements are correct?
1. The signature of an indexer consists of the number and types of its formal parameters.
2. Indexers are similar to properties except that their accessors take parameters.
3. Accessors of interface indexers use modifiers.
4. The type of an indexer and the type of its parameters must be at least as accessible as the indexer itself.
5. An interface accessor contains a body.
Options
A. 1, 3, 5
B. 1, 2, 4
C. 3, 5
D. 2, 4

Discuss

4. A Student class has a property called rollNo and stu is a reference to a Student object and we want the statement stu.RollNo = 28 to fail. Which of the following options will ensure this functionality?
Options
A. Declare rollNo property with both get and set accessors.
B. Declare rollNo property with only set accessor.
C. Declare rollNo property with get, set and normal accessors.
D. Declare rollNo property with only get accessor.
E. None of the above

Discuss

Options
A. 1, 3
B. 2, 4, 5
C. 4 only
D. 3, 5

Discuss

8. Which of the following statements is correct about properties used in C#.NET?
Options
A. Every property must have a set accessor and a get accessor.
B. Properties cannot be overloaded.
C. Properties of a class are actually methods that work like data members.
D. A property has to be either read only or a write only.

Discuss

10. Suppose a Student class has an indexed property. This property is used to set or retrieve values to/from an array of 5 integers called scores[]. We want the property to report "Invalid Index" message if the user attempts to exceed the bounds of the array. Which of the following is the correct way to implement this property?
Options

class Student
{
    int[] scores = new int[5] {3, 2, 4,1, 5}; 
    public int this[ int index ]
    { 
        set
        { 
            if (index < 5)
                scores[index] = value; 
            else
                Console.WriteLine("Invalid Index");
        } 
    } 
}

class Student
{
    int[] scores = new int[5] {3, 2, 4, 1, 5};
    public int this[ int index ]
    { 
        get
        { 
            if (index < 5)
                return scores[ index ]; 
            else
            { 
                Console.WriteLine("Invalid Index"); return 0; 
            } 
        } 
        set
        { 
            if (index < 5)
                scores[ index ] = value;
            else 
                Console.WriteLine("Invalid Index"); 
        } 
    } 
}

class Student
{
    int[] scores = new int[5] {3, 2, 4, 1, 5}; 
    public int this[ int index ]
    { 
        get
        { 
            if (index < 5)
                return scores[ index ]; 
                else
                { 
                    Console.WriteLine("Invalid Index"); 
                    return 0; 
                } 
        } 
    } 
}

class Student
{
    int[] scores = new int[5] {3, 2, 4, 1, 5}; 
    public int this[ int index ]
    { 
        get
        {
            if (index < 5)
                scores[ index ] = value; 
            else
            { 
                Console.WriteLine("Invalid Index");
            } 
        }
        set
        { 
            if (index < 5)
                return scores[ index ];
            else
            { 
                Console.WriteLine("Invalid Index");
                return 0;
            }
        }
    }
}

Discuss

Correct Answer:

class Student
{
    int[] scores = new int[5] {3, 2, 4, 1, 5};
    public int this[ int index ]
    { 
        get
        { 
            if (index < 5)
                return scores[ index ]; 
            else
            { 
                Console.WriteLine("Invalid Index"); return 0; 
            } 
        } 
        set
        { 
            if (index < 5)
                scores[ index ] = value;
            else 
                Console.WriteLine("Invalid Index"); 
        } 
    } 
}

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CuriousTab

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An Employee class has a property called age and emp is reference to a Employee object and we want the statement Console.WriteLine(emp.age) to fail. Which of the following options will ensure this functionality?

Properties problems

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CuriousTab

CuriousTab

Discussion

An Employee class has a property called age and emp is reference to a Employee object and we want the statement Console.WriteLine(emp.age) to fail. Which of the following options will ensure this functionality?

Properties problems

Search Results

More in C# Programming:

Aptitude

Engineering

Programming

Reasoning

Links

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