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How many types of cookies are there in ASP.NET ?
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August 05, 2009
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How many types of cookies are there in ASP.NET ?
All types in C# implicitly derive from.........
System.Object Class. System.Object is the parent class of all .NET classes
How many types of assemblies are in .net , what are they?
Private, Public/Shared, Satellite.
What are the types of indexes available with SQL Server?
There are basically two types of indexes that we use with the SQL Server. Clustered and the Non-Clustered.
Different Types of Remote Objects?
The remoting infrastructure allows you to create two distinct types of remote objects.
1.Client-activated objects - A client-activated object is a server-side object whose creation and destruction is controlled by the client application. An instance of the remote object is created when the client calls the new operator on the server object. This instance lives as long as the client needs it, and lives across one to many method calls. The object will be subject to garbage collection once it''s determined that no other clients need it.
2.Server-activated objects - A server-activated object''s lifetime is managed by the remote server, not the client that instantiates the object. This differs from the client-activated object, where the client governs when the object will be marked for finalization. It is important to understand that the server-activated objects are not created when a client calls New or Activator.GetObject. They are rather created when the client actually invokes a method on the proxy. There are two types of server activated objects. They are:
I. Single call . Single-call objects handle one, and only one, request coming from a client. When the client calls a method on a single call object, the object constructs itself, performs whatever action the method calls for, and the object is then subject to garbage collection. No state is held between calls, and each call (no matter what client it came from) is called on a new object instance.
II.Singleton - The difference in a singleton and single call lies in lifetime management. While single-call objects are stateless in nature, singletons are stateful objects, meaning that they can be used to retain state across multiple method calls. A singleton object instance serves multiple clients, allowing those clients to share data among themselves.
what are value types and reference types?
Value type - bool, byte, chat, decimal, double, enum , float, int, long, sbyte, short, strut, uint, ulong, ushort
Value types are stored in the Stack
Reference type - class, delegate, interface, object, string
Reference types are stored in the Heap
What are the types of threading models?
. Single Threading: This is the simplest and most common threading
model where a single thread corresponds to your entire application's
Apartment Threading (STA): This allows multiple threads to exist in a
single application. In single threading apartment (STA), each thread
is isolated in it's own apartment. The process may contain multiple
threads (apartments) however when an object is created in a
thread (i.e. apartment) it stays within that
apartment. If any communication needs to occur between different
threads (i.e. different apartments) then we must marshal the first
thread object to the second thread.
Free Threading: The most complex threading model. Unlike STA,
threads are not confined to their own apartments. Multiple treads can
make calls to the same methods and same components at the
How many types of tables are present in SQL SERVER?
There are 2 types of temporary tables, local and global in sql server.
Local temporary tables are created using a single pound (#) sign and are visible to a single connection and automatically dropped when that connection ends.
Global temporary tables are created using a double pound (##) sign and are visible across multiple connections and users and are automatically dropped when all SQL sessions stop referencing the global temporary table.
What are the different types of Assembly?
There are two types of assembly Private and Public assembly.
A private assembly is normally used by a single application, and is stored in the application's directory, or a sub-directory beneath. A shared assembly is normally stored in the global assembly cache, which is a repository of assemblies maintained by the .NET runtime. Shared assemblies are usually libraries of code which many applications will find useful, e.g. Crystal report classes which will be used by all application for Reports.
What are different types of JIT?
JIT compiler is a part of the runtime execution environment.
In Microsoft .NET there are three types of JIT compilers:
.Pre-JIT: - Pre-JIT compiles complete source code into native code in a single compilation cycle. This is done at the time of deployment of the application.
.Econo-JIT: - Econo-JIT compiles only those methods that are called at runtime. However, these compiled methods are removed when they are not required.
.Normal-JIT :- Normal-JIT compiles only those methods that are called at runtime. These methods are compiled the first time they are called, and then they are stored in cache. When the same methods are called again, the compiled code from cache is used for execution.
What are Value types and Reference types?
Value types directly contain their data which are either allocated on the stack or allocated in-line in a structure. Reference types store a reference to the value's memory address, and are allocated on the heap. Reference types can be self-describing types, pointer types, or interface types. Variables that are value types each have their own copy of the data, and therefore operations on one variable do not affect other variables. Variables that are reference types can refer to the same object; therefore, operations on one variable can affect the same object referred to by another variable. All types derive from the System.Object base type.
How many types of Transactions are there in COM + .NET ?
There are 5 transactions types that can be used with COM+. Whenever an object is registered with COM+ it has to abide either to these 5 transaction types.
Disabled: - There is no transaction. COM+ does not provide transaction support for this component.
Not Supported: - Component does not support transactions. Hence even if the calling component in the hierarchy is transaction enabled this component will not participate in the transaction.
Supported: - Components with transaction type support will be a part of the transaction. This will be only if the calling component has an active transaction. If the calling component is not transaction enabled this component will not start a new transaction.
Required: - Components with this attribute require a transaction i.e. either the calling should have a transaction in place else this component will start a new transaction.
Required New: - Components enabled with this transaction type always require a new transaction. Components with required new transaction type instantiate a new transaction for themselves every time.
How many types of validation controls are provided by ASP.NET ?
There are six main types of validation controls:-
RequiredFieldValidator: It checks whether the control have any value. It's used when you want the control should not be empty.
RangeValidator: It checks if the value in validated control is in that specific range.
CompareValidator: It checks that the value in controls should match the value in other control.
RegularExpressionValidator: When we want the control value should match with a specific regular expression.
CustomValidator: It is used to define UserDefined validation.
ValidationSummary: It displays summary of all current validation errors.
Different types of replication? Explain Each one..
The SQL Server 2000-supported replication types are:
Snapshot replication distributes data exactly as it appears at a specific moment in time and does not monitor for updates to the data. Snapshot replication is best used as a method for replicating data that changes infrequently or where the most up-to-date values (low latency) are not a requirement. When synchronization occurs, the entire snapshot is generated and sent to Subscribers.
Transactional replication, an initial snapshot of data is applied at Subscribers, and then when data modifications are made at the Publisher, the individual transactions are captured and propagated to
Merge replication is the process of distributing data from Publisher to Subscribers, allowing the Publisher and Subscribers to make updates while connected or disconnected, and then merging the updates between sites when they are connected.
Value Types & Reference Types
In C# data types are classified into two categories-value types and reference types. The difference between value type and reference type is that the variables of value type are allocated on stack, whereas, variables of reference type are allocated on heap. Secondly, the variable of value type contains data, whereas, variable of reference type contains the address of the memory location where data of that variable is stored. Among built-in data types, all the types of integers, floats, doubles, decimals, chars and bools are value types, whereas, the string and object are reference types. Among user-defined data types, classes, interfaces and delegates are reference types, whereas, structure is a value type.
Memory allocated for objects of value types is freed when they go out of scope. Memory allocated for objects of reference types is freed when they are no more being referenced.
Both the value and reference types have advantages and disadvantages. Memory allocation on stack is faster than that on heap. So, if the object is small, we must use a value type rather than a reference type. On the other hand, if the object is big we must avoid declaring it as a value type. Because, if we assign it to any other object, its whole contents would get copied, consuming additional memory. As against this, in case of a reference type only the reference is copied rather than the whole object
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