Welcome to the Indexers and Exception Handling MCQs Page

Dive deep into the fascinating world of Indexers and Exception Handling with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Indexers and Exception Handling, a crucial aspect of C# Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Indexers and Exception Handling, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within C# Programming.

Check out the MCQs below to embark on an enriching journey through Indexers and Exception Handling. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of C# Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Indexers and Exception Handling. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Indexers and Exception Handling MCQs | Page 2 of 13

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Q11.

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?

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

Answer: (b).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");
}
}
}

Q12.

Which of the following statements is correct about properties used in C#.NET?

Every property must have a set accessor and a get accessor.

Properties cannot be overloaded.

Properties of a class are actually methods that work like data members.

A property has to be either read only or a write only.

Discuss

Answer: (c).Properties of a class are actually methods that work like data members.

Q13.

Which of the following is the correct way to implement a read only property Length in a Sample class?

class Sample
{
int len;
public int Length
{
get
{
return len;
}
}
}

class Sample
{
public int Length
{
get
{
return Length;
}
}
}

class Sample
{
int len;
public int Length
{
get
{
return len;
}
set
{
len = value;
}
}
}

class Sample
{
int len;
public int Length
{
Readonly get
{
return len;
}
}
}

Discuss

Answer: (a).class Sample
{
int len;
public int Length
{
get
{
return len;
}
}
}

Q14.

Which of the folowing does an indexer allow to index in the same way as an array?

1. A class
2. A property
3. A struct
4. A function
5. An interface

1, 3, 5

2, 4

3, 5

3, 4, 5

Discuss

Answer: (a).1, 3, 5

Q15.

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?

Declare age property with only get accessor.

Declare age property with only set accessor.

Declare age property with both get and set accessors.

Declare age property with get, set and normal accessors.

Discuss

Answer: (b).Declare age property with only set accessor.

Q16.

Which of the following is NOT a .NET Exception class?

Exception

StackMemoryException

DivideByZeroException

OutOfMemoryException

Discuss

Answer: (b).StackMemoryException

Q17.

Which of the following statements is correct about an Exception?

It occurs during compilation.

It occurs during linking.

It occurs at run-time.

It occurs during Just-In-Time compilation.

Discuss

Answer: (c).It occurs at run-time.

Q18.

In C#.NET if we do not catch the exception thrown at runtime then which of the following will catch it?

Compiler

CLR

Linker

Loader

Discuss

Answer: (b).CLR

Q19.

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


using System;
namespace CompSciBitsConsoleApplication
{
    class MyProgram
    {
        static void Main(string[] args)
        {
            int index = 6;
            int val = 44;
            int[] a = new int[5];
            try
            {
                a[index] = val ;
            }    
            catch(IndexOutOfRangeException e)
            {
                Console.Write("Index out of bounds ");
            }
            Console.Write("Remaining program");
        }
    }
}

Value 44 will get assigned to a[6].

It will output: Index out of bounds

It will output: Remaining program

It will output: Index out of bounds Remaining program

Discuss

Answer: (d).It will output: Index out of bounds Remaining program

Q20.

Which of the following statements are correct about exception handling in C#.NET?

1. If an exception occurs then the program terminates abruptly without getting any chance to recover from the exception.
2. No matter whether an exception occurs or not, the statements in the finally clause (if present) will get executed.
3. A program can contain multiple finally clauses.
4. A finally clause is written outside the try block.
5. finally clause is used to perform clean up operations like closing the network/database connections.

1 only

2 only

2 and 5 only

3 and 4 only

Discuss

Answer: (c).2 and 5 only

Page 2 of 13

Welcome to the Indexers and Exception Handling MCQs Page

Indexers and Exception Handling MCQs | Page 2 of 13

Explore more Topics under C# Programming

Basics of C# Programming

Data Types,Variables and Operators

Control Instructions

Classes and Objects

Arrays and Strings

Interfaces,Inheritance and Polymorphism

Functions and Subroutines

Console IO and Stream Classes

Delegates and Generics

LINQ

Collection Classes and Mathematical Functions

Namespaces and Preprocessors

Miscellaneous Topics

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