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Home >> Interview Question >> Sql Server >> Post New Question Subscribe to Interview Questions

Which of the following is a Large object data type?

Posted By :Syed Shakeer Hussain     Posted Date :November 29, 2009    Points :10   Category :Sql Server 
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You can also find related Interview Question to Which of the following is a Large object data type?  below: 

What is the minimum value of TINYINT data type?

  
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BIT DATA TYPE is an?

  
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What data type does the RangeValidator control support in Asp.net?

  
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You have a column that will only contain values from 0 to 256. What's the most economical data type to use for the column?

A. TINYINT
B. SMALLINT
C. INT
D. DECIMAL(3)
E. VARCHAR(3)


  
Correct Answer : B
Explanation:-
------------
A SMALLINT data type uses only 2 bytes of data and can store value from -32,768 to 32,767. A TINYINT data type cannot be used because the maximum value it can hold is 255. Although an INT data type can be used, SMALLINT will use only 2 bytes compared to INT's 4 bytes. VARCHAR(3) will use 3 bytes while DECIMAL(3) will use 5 bytes.
(More...)

This is the progam using inheritence, what is the order of calling constructors and what is the output?
Public Class ConstructorEx
Public Class Class1
Dim a As Integer
Sub New()
a = 1
Console.WriteLine("a in initialized in Class1")
End Sub
End Class

Public Class Class2
Inherits Class1
Dim b As Integer
Sub New()
b = 1
Console.WriteLine("b in initialized in Class2")
End Sub
End Class
Public Class Class3
Inherits Class2
Dim c As Integer
Sub New()
c = 1
Console.WriteLine("c in initialized in Class2")
End Sub
End Class

Shared Sub main()
'Creation of the object of type Class3
Dim c As New Class3()
Console.ReadLine()
End Sub
End Class

  
In this example creation of the object of type class3 calls the Class3 constructor and that constructor calls Class2 Constructor Class2 Calls Class1 Constructor.So first Class1 constructor will execute and then control will be trasfered to class2 constructor,After executing the class2 constructor the control will be treansfered to Class3 constructor.
means

Class1
|---->Sub New()---------------------|
| 'First it will execute <-----|
| End Sub |
| |
| Class2 |
|--->Sub New()----------------------|
| 'Second it will execute<-------|
| End Sub |
| |
| Class3 |
----Sub New()-----------------------|
'Third this will executes<-----|
End Sub

Means In the Creation of the object of type C, First Class1 Constuctor initializes the data, then class2 then class3.

So output of this program is
a in initialized in Class1
b in initialized in Class2
c in initialized in Class3
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Why string are called Immutable data Type ?

  
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Why string are called Immutable data Type ?

  
The memory representation of string is an Array of Characters, So on re-assigning the new array of Char is formed & the start address is changed . Thus keeping the Old string in Memory for Garbage Collector to be disposed. (More...)

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