C# Indexers and Exceptions Mcqs
Our collections of Multiple choice questions and answers focuses on study of C# Indexers and Exceptions. These questions are chosen from a collection of most authoritative and best reference books on C# Indexers and Exceptions. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams and various tests and job interviews. One should practice our Mcqs to assimilate C# Indexers and Exceptions comprehensively.
C# Programming Mcqs
- Arrays and Strings mcqs
- Classes and Objects Mcqs
- Collections & Mathematical Functions Mcqs
- Console IO and Stream Classes Mcqs
- Control Instructions Mcqs
- Data Types,Variables & Operators Mcqs
- Delegates and Generics Mcqs
- Functions and Subroutines Mcqs
- Indexers and Exceptions Mcqs
- Interfaces,Inheritance & Polymorphism Mcqs
- Miscellaneous Topics Mcqs
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Computer MCQS
Sciences MCQS
2.
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?
Declare rollNo property with both get and set accessors.
Declare rollNo property with only set accessor.
Declare rollNo property with get, set and normal accessors.
Declare rollNo property with only get accessor.
Answer & Solution
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3.
If a class Student has an indexer, then which of the following is the correct way to declare this indexer to make the C#.NET code snippet given below work successfully? Student s = new Student();
s[1, 2] = 35;
Student s = new Student();
s[1, 2] = 35;
class Student
{
int[ ] a = new int[5, 5];
public property WriteOnly int this[int i, int j]
{
set
{
a[i, j] = value;
}
}
}
class Student
{
int[ , ] a = new int[5, 5];
public int property WriteOnly
{
set
{
a[i, j] = value;
}
}
}
class Student
{
int[ , ] a = new int[5, 5];
public int this[int i, int j]
{
set
{
a[i, j] = value;
}
}
}
class Student
{
int[ , ] a = new int[5, 5];
int i, j;
public int this
{
set
{
a[i, j] = value;
}
}
}
Answer & Solution
class Student
{
int[ , ] a = new int[5, 5];
public int this[int i, int j]
{
set
{
a[i, j] = value;
}
}
}
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4.
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.
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.
1, 3, 5
1, 2, 4
3, 5
2, 4
5.
If Sample class has a Length property with get and set accessors then which of the following statements will work correctly? 1.
Sample.Length = 20;
2.
Sample m = new Sample();
m.Length = 10;
3.
Console.WriteLine(Sample.Length);
4.
Sample m = new Sample();
int len;
len = m.Length;
5.
Sample m = new Sample();
m.Length = m.Length + 20;
1.
Sample.Length = 20;
2.
Sample m = new Sample();
m.Length = 10;
3.
Console.WriteLine(Sample.Length);
4.
Sample m = new Sample();
int len;
len = m.Length;
5.
Sample m = new Sample();
m.Length = m.Length + 20;
1, 3
2, 4, 5
4 only
3, 5
6.
Which of the following is the correct way to implement a write only property Length in a Sample class?
class Sample
{
public int Length
{
set
{
Length = value;
}
}
}
class Sample
{
int len;
public int Length
{
get
{
return len;
}
set
{
len = value;
}
}
}
class Sample
{
int len;
public int Length
{
WriteOnly set
{
len = value;
}
}
}
class Sample
{
int len;
public int Length
{
set
{
len = value;
}
}
}
Answer & Solution
class Sample
{
int len;
public int Length
{
set
{
len = value;
}
}
}
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7.
If a Student class has an indexed property which is used to store or retrieve values to/from an array of 5 integers, then which of the following are the correct ways to use this indexed property? 1.Student[3] = 34;
2.
Student s = new Student();
s[3] = 34;
3.
Student s = new Student();
Console.WriteLine(s[3]);
4.
Console.WriteLine(Student[3]);
5.
Student.this s = new Student.this();
s[3] = 34;
1.Student[3] = 34;
2.
Student s = new Student();
s[3] = 34;
3.
Student s = new Student();
Console.WriteLine(s[3]);
4.
Console.WriteLine(Student[3]);
5.
Student.this s = new Student.this();
s[3] = 34;
1, 2
2, 3
3, 4
3, 5
8.
If Sample class has a Length property with set accessor then which of the following statements will work correctly?
Sample m = new Sample();
int l;
l = m.Length;
Sample m = new Sample();
m.Length = m.Length + 20;
Sample.Length = 20;
Sample m = new Sample();
m.Length = 10;
Answer & Solution
Sample m = new Sample();
m.Length = 10;
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9.
If Sample class has a Length property with get accessor then which of the following statements will work correctly?
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;
Sample.Length = 20;
Answer & Solution
Sample m = new Sample();
int l;
l = m.Length;
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10.
An Account class has a property called accountNo and acc is a reference to a bank object and we want the C#.NET code snippet given below to work. Which of the following options will ensure this functionality? acc.accountNo = 10;
Console.WriteLine(acc.accountNo);
acc.accountNo = 10;
Console.WriteLine(acc.accountNo);
Declare accountNo property with both get and set accessors.
Declare accountNo property with only get accessor.
Declare accountNo property with get, set and normal accessors.
Declare accountNo property with only set accessor.
Answer & Solution
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11.
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;
}
}
}
}
Answer & Solution
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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12.
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.
Answer & Solution
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13.
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;
}
}
}
Answer & Solution
class Sample
{
int len;
public int Length
{
get
{
return len;
}
}
}
No Solution for this Answer..! Report or Discus this Question
14.
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. A class
2. A property
3. A struct
4. A function
5. An interface
1, 3, 5
2, 4
3, 5
3, 4, 5
15.
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.
Answer & Solution
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