20/09/2011
Difference between Dynamic polymorphism and static polymorphism
In static polymorphism response to a function is decided at compile time.
In Dynamic polymorphism response to a function is decided at run time.
1)Static polymorphism is achieved by method overloading where as run time polymorphism( or dynamic polymorphism) is achieved by method overriding.
2)static polymorphism uses the concept of compile time binding(or early binding) where as dynamic polymorphism uses the concept of runtime binding (or late binding).
3)Dynamic polymorphism is faster than static polymorphism.
4)To implement static polymorphism inheritance is not necessary where as to implement dynamic polymorphism inheritance is necessary.
5)Generally when a programmer want to extend existing feature in a software,method overloading(load + extra load(more lines of code)) is used,and a programmer uses method overriding when he wants to provide a different implementation for the sa
Explain polymorphism?
polymorphism
poly+morphos=many forms
poly means "many" morphos means "forms".polymorphism allows one interface to be used for many functions.
In static polymorphism response to a function is decided at compile time.
In Dynamic polymorphism response to a function is decided at run time.
1)Static polymorphism is achieved by method overloading where as run time polymorphism( or dynamic polymorphism) is achieved by method overriding.
2)static polymorphism uses the concept of compile time binding(or early binding) where as dynamic polymorphism uses the concept of runtime binding (or late binding).
3)Dynamic polymorphism is faster than static polymorphism.
4)To implement static polymorphism inheritance is not necessary where as to implement dynamic polymorphism inheritance is necessary.
5)Generally when a programmer want to extend existing feature in a software,method overloading(load + extra load(more lines of code)) is used,and a programmer uses method overriding when he wants to provide a different implementation for the same feature.
Define virtual keyword?
when a method or property in a parent class need to be overridden in the child class,it should be declared as virtual in parent class and can be overridden in child class using override keyword.
Now we should discuss about static polymorphism and dynamic polymorphism :)
08/08/2011
sheroy digital systems
WALKIN LOACATION:-
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41,opposite to HAL Airport road,opp. to total mall,above spencers.
Contact Person:-
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softsol
Expected CTC:
Current CTC:
Notice period:
and also send your updated resumes to sreekanth.vempalli@softsol.net
01/08/2011
slideshow using java script....
/*Java Script*/
<script type="text/javascript">
var myimages=new Array()
function slideshowimages()
{
for (i=0;i<slideshowimages.arguments.length;i++)
{
myimages[i]=new Image()
myimages[i].src=slideshowimages.arguments[i]
}
}
</script>
<script type="text/javascript">
var myimages=new Array()
function slideshowimages()
{
for (i=0;i<slideshowimages.arguments.length;i++)
{
myimages[i]=new Image()
myimages[i].src=slideshowimages.arguments[i]
}
}
</script>
26/07/2011
24/07/2011
Why State Management ?
In traditional web programming information associated with the web page and with controls of page will be lost between post-backs.
Ex:-when user enters some text in text box (or) mark a check-box (or) selected an item in combo-box,that information(changes) will be lost in the round trip from client/browser to server.
To overcome this Asp.net Introduced severel methods to store data on the client-browser/server and retrieve from client-browser/server.
23/07/2011
| Job Posted | Company | Location | Position | Eligibility | Last Date | DETAILS |
|---|---|---|---|---|---|---|
| 20/8/11 | cognizant | All over India | Multi postions | B.E/B.Tech/B.Sc | 29/8/11 | Register |
| 8/8/11 | SoftSol | Hyderabad | Exp(1-2 Yrs) | B.E/B.Tech | ASAP | Register |
| 8/8/11 | cognizant | All over india | Freshers(2011) | BCA/BSC/MSC | 12/8/11 | Register |
| 8/8/11 | HCL | All over india | Freshers(2011) | B.E/M.Tech/MCA/B.Sc | ASAP | Register |
22/07/2011
Asp.net useful Tips
1)Use informative ALT attribute for every graphical representation(PNG files,JPEG files) to show who cant view these graphical representations.
21/07/2011
Difference between Dispaly:none and Visibility:hidden
Display : None Removes the
Visibility : Hidden Hides the element but it still takes up space in the document therefore affecting the layout.
Difference between APP_Code & APP_Data folders in ASP.Net ?
- App_code folder contains all .cs/.vb files and they will compile automatically when ever you change anything in the files within. code present in App_code folder is automatically referenced by asp.net web application.
- App_data folder is used to store files that can be used as database files(.mdf/xml files) .It will be created automatically when a new website is created.Developers use this folder for storing database used by Asp.net application.
Does dotnet support multiple inheritance?
- c# and vb does not support multiple inheritance.
- They supports only multiple interface inheritance.
How to delete duplicate rows from tables with no primary key!
Ans) Use SET ROWCOUNT value
Ex:- SET ROWCOUNT 2
DELETE FROM table_name WHERE somecolumn1=somecolumnvalue
SET ROWCOUNT 0
Imagine a table having 3 similar rows.The above delete statement executes 2 times deleting the extra 2 rows.Dont forget to set ROWCOUNT to 0 after succesfull query execution.
Ex:- SET ROWCOUNT 2
DELETE FROM table_name WHERE somecolumn1=somecolumnvalue
SET ROWCOUNT 0
Imagine a table having 3 similar rows.The above delete statement executes 2 times deleting the extra 2 rows.Dont forget to set ROWCOUNT to 0 after succesfull query execution.
17/07/2011
INDEX Statement
- Indexes are used to search/query the data from the table, without reading the entire table.
- Allows the application to find the data fast from database thereby increasing the query speed.
16/07/2011
DROP,DELETE & TRUNCATE
DROP:- Tables,Databases,Indexes can be easily removed using DROP Statement.
EX:-DROP TABLE table-name
Deletes table completely from database.
similarly DROP INDEX index-name
DROP DATABASE database-name
EX:-DROP TABLE table-name
Deletes table completely from database.
similarly DROP INDEX index-name
DROP DATABASE database-name
12/07/2011
What is a cookie ?
Cookie is a piece of information stored in the client computer/Browser which is limited to 4k in size.
Advatanges:-
There are 2 types of cookies
Advatanges:-
- very simple to implement
- Browser automatically arranges cookies stored for multiple sites
- It stores cookie data in simple text format,so its not secure.
- cookie size limited to 4 kb
- No. of cookies stored by browser are limited to 20.some allow 300,when a new cookie comes old one will be discarded,
There are 2 types of cookies
- Non-persistent(Temporary) cookies
- Persistent(Permanent) cookies
What is View State ?
View State is a technique used by asp.net webpage to persist changes to state of a webform between postbacks.
View state of page is by default stored in hidden form field named _viewstate.
ADVANTAGES:-
View state of page is by default stored in hidden form field named _viewstate.
ADVANTAGES:-
- Automatic retention of page and control state
- server resources not required.(View state can also be stored in server side.)
- The values in view state are compressed and hashed
- view state increases the page size since it is stored in the page itself.
- Although view state stores data in hashed format they can be tampered.
06/07/2011
What is the advantage of SET NOCOUNT ON ?
- Use Nocount at the begining of all your Stored procedures,Functions and Triggers
This intensifies when we have many operations(Insert,Update,Delete) in a stored procedure.That means each operation returns internal message within the stored procedure execution cycle.
Polymorphism
OverLoading and OverRiding are both examples of Polymorphism.
OVERLOADING -- Its a mechanism in which we can have 2 or more methods with same name.Thinking how,its possible using different parameter datatypes or different number of parameters or different order of parameters.
- OverRiding is Dynamic Polymorphism(executed at runtime)
- OverLoading is Static Polymorphism(executed at compile time)
OVERLOADING -- Its a mechanism in which we can have 2 or more methods with same name.Thinking how,its possible using different parameter datatypes or different number of parameters or different order of parameters.
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