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Home >> Interview Question >> .NET Framework >> Post New Question Subscribe to Interview Questions

What is type safe?

Posted By :Faizal     Posted Date :September 09, 2008    Points :10   Category :.NET Framework 
Type safety is about increasing the opportunities for the compiler to detect your coding errors. If you use interfaces instead of delegates the compiler will have more opportunities to detect your coding errors.

You can also find related Interview Question to What is type safe?  below: 

Why .NET delegates are called type safe?

  
.NET delegates are type safe. If you will attempt to pass a delegate, a method that does not "match the pattern", you will receive a compile time error "Method does not match delegate pattern!". (More...)

Which is the design pattern that is type-safe and still extensible on runtime?

  
Decorator Pattern design pattern that is type-safe and still extensible on runtime (More...)

What are safe controls, and what type of information, is placed in that element in a SharePoint web.config file?

  
When you deploy a WebPart to SharePoint, you must first make it as a safe control to use within SharePoint in the web.config file. Entries made in the safe controls element of SharePoint are encountered by the SharePointHandler object and will be loaded in the SharePoint environment properly, those not will not be loaded and will throw an error.
In the generic safe control entry (this is general, there could be more), there is generally the Assembly name, the namespace, the public key token numeric, the typename, and the safe declaration (whether it is safe or not). There are other optional elements. (More...)

Is ArrayList is a type safe collection?

  
No, ArrayList is not a type safe collection because it allows you to add a any object. That means if you have one arrayList class object you can add in Integer, string, boolean, double etc value into one ArrayList class object.

for eg

ArrayList arr = new ArrayList();
arr("One");
arr.Add(1);
arr.Add(true); (More...)

Difference between type constructor and instance constructor? What is static constructor, when it will be fired? And what is its use?

  
(Class constructor method is also known as type constructor or type initializer)
Instance constructor is executed when a new instance of type is created and the class constructor is executed after the type is loaded and before any one of the type members is accessed. (It will get executed only 1st time, when we call any static methods/fields in the same class.) Class constructors are used for static field initialization. Only one class constructor per type is permitted, and it cannot use the vararg (variable argument) calling convention. (More...)

What is type system unification?

  
The goal of type system unification is to bridge the gap between value types and reference types that exists in most languages. For example, a Stack class can provide Push and Pop methods that take and return object values.

public class Stack
{
public object Pop() {...}
public void Push(object o) {...}
}
Because C# has a unified type system, the Stack class can be used with elements of any type, including value types like int. (More...)

What are the requirements to create a CLR based user-defined type?

  
CLR must be enabled for the instance and A class created with a CLR-compatible language. (More...)

What is return type of Executenonquery() ?

  
int will be returned when you call ExecuteNonQuery() in ADO.NET (More...)

What is the common type system (CTS)?

  
The common type system is a rich type system, built into the Common Language Runtime, that supports the types and operations found in most programming languages. The common type system supports the complete implementation of a wide range of programming languages. (More...)

If you are using C language to implement the heterogeneous linked list, what pointer type will you use?

  
The heterogeneous linked list contains different data types in its nodes and we need a link, pointer to connect them. It is not possible to use ordinary pointers for this. So we go for void pointer. Void pointer is capable of storing pointer to any type as it is a generic pointer type. (More...)

What is an incomplete type?

  
Incomplete types refers to pointers in which there is non availability of the implementation of the referenced location or it points to some location whose value is not available for modification.
Example:
int *i=0x400 // i points to address 400
*i=0; //set the value of memory location pointed by i.
Incomplete types are otherwise called uninitialized pointers. (More...)

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