c# dotnet interview Questions

c# dotnet interview Questions
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Question. What collection type you used?
Answer. ArrayList

Question. What is difference between arraylist and array?
Answer. Array can store single data type and inserting will cost more, while in array list you can store multiple datatypes and inserting and removing element is easy.

Question. What are delegates?
Answer. it is function to pointer.

Question. What are events?
Answer. events are used with delegate to fire a method on any event occurrence?

Question. What is use of delegate?
Answer. Used of delegate to call a function.

Question. any other use of delegate?
Answer. Find out.

Question. What is difference between list and arraylist.
Answer. list is interface while arraylist is implementation.

Question. What is dataset?
Answer. can contains tables and their relations.

Question. What is datareader?
Answer. Read one row at a time , forward only.

Question. How will you fill dropdown values using datareader?
Answer.
While(datareader.read())
{
bind every value to dropdown
}

or construct a dataset from datareader inside loop and assign to dropdown

Question. What is abstraction?
Answer. Representing complex word in simplified manner.

Question. what is OOPs ?
Answer. programming language fully supported by objects

Question. What is Objects?
Answer. by using Objects we can represent real word easily.

Question. what are the features of objects oriented programming?
encapsulation
overloading
overriding
abstraction
association
generalization
inheritance
data hiding

Question. Have you worked on multithreaded application?
Answer. yes

Question. Describe the multithreaded application ?
Answer. Describe a demo multithread application and why using multithreading.

Question. What is Strongly typed dataset?
Answer. Strongly typed dataset is simple dataset containing the property to have datatype associated with columns and can access column values by using the column names.

Please friends to contribute questions of company interviews you attended mail us cinterviews.blogspot.com@gmail.com it will be useful for our job search community.www.cinterviews.com appreciates your contribution