A) TopDownB) BottomUpC) None

Sunil

• Aug 31st, 2014

TOPDOWN is the correct answer. Always base class constructor is called before a sub-class constructor gets called. So, if a class is higher in the class hierarchy, then it will always get called be...

narendra

• Aug 14th, 2014

"c# class Program { public class BaseClass { public BaseClass() { Console.WriteLine("Base class constructor"); ...

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Abinash Dinakaran

• Dec 22nd, 2014

Constructors are the member functions which has same name as class name. Constructors are used to initialize a value for a variable so that we can be able to avoid junk values thrown to a variable.

sunil

• Sep 24th, 2014

Constructor is the special type of methods, which is called when we crate the object for the class.
Constructor will have same name as class name.
overloaded constructor can also be there.

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A) Interface definitions does not have implementationB) Interfaces must be declared as publicC) Interfaces can be instantiatedD) Interface does not have constructorsExplanation: Interfaces can only be implemented by inheriting and they can not be instantiated

Saurabh

• Dec 24th, 2014

Both B & C are wrong. Interfaces can be private and in that case public classes cannot inherit them. You can define it within a class. C is wrong as we cannot create an instance of the interface.

TheDentist

 Profile Answers by TheDentist Questions by TheDentist

• Apr 23rd, 2013

C is the correct answer. Interfaces dont have constructors so they cant be instantiated.

http://msdn.microsoft.com/en-US/library/vstudio/ms173156.aspx

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A) Constructors should have the same name as class nameB) Constructors have to be public so that class can be instantiatedC) Constructors can not be overloadedExplanation: Constructors can be overloaded with different parameters

S.M.Sadrul Islam Asif

• Feb 5th, 2015

B,We can have private constructor.

Manish

• Jan 7th, 2015

B&C are wrong. B : In case of singleton we create a private constructur for class. A static method in this class calls the constructor nad returns the class instance. C : We can have any number of co...

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Deepak

• Mar 11th, 2015

Check if dataset object is instanciated
Check uf it contains tables

Question is not to check whether it has records or not?Question is if it is empty

Checking the row in first table does not help as there can exists more then one table

Chandrashekhar

• Nov 16th, 2013

DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlString, sqlConn);
da.Fill(ds);

It is work i sure

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A) [ ]B) ( )C) TypeOf

Sameer Patel

 Profile Answers by Sameer Patel Questions by Sameer Patel

• Mar 31st, 2015

B

Logan

• Mar 26th, 2015

B

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Pooja

• Apr 1st, 2015

Overriding is redefining an existing virtual method from the base class while shadowing is creating a new method with same name and same signature as in the base class

Saket Choubey

• Dec 29th, 2014

Shadowing hides the base class method from the derived class method by using new keyword. Purpose of shadowing is not to override a method but to give a new implementation.

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You have multiple rows in C# data table and you have to save it in database using just one call, How will you do it?

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LordAlex  

 Profile Answers by LordAlex Questions by LordAlex

• Member Since Nov-2011 | Nov 5th, 2011

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In a typical multiple-tier implementation, the steps for creating and refreshing a DataSet, and in turn, updating the original data are to: 1. Build and fill each DataTable in a DataSet with data from a data source using a DataAdapter. 2. Change the data in individual DataTable objects by adding, updating, or deleting DataRow objects. 3. Invoke the GetChanges method to create a second DataSet that features only the changes to the data. 4. Call the Update method of the DataAdapter, passing the second DataSet as an argument. 5. Invoke the Merge method to merge the changes from the second DataSet into the first. 6. Invoke the AcceptChanges on the DataSet. Alternatively, invoke RejectChanges to cancel the changes.

Vasu

• Apr 10th, 2015

Yes

indrajith

• Jan 22nd, 2015

We can use SqlBulkCopy class here for example

Code
span style="color: #ff0000;">"dbtablename"

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Skill/Topic: BeginnerA) object typeB) reference type

Vasu

• Apr 10th, 2015

B

prasad mapari

• Mar 24th, 2015

B .?its?reference?type. Bcos?string?dosnt have?default?or?predefined?size. Even?sometimes it?looks?like a?value?type?but?the?actual?gets?stored?in?dynamic?memory?and t?reference?wl b?stored?in?stack.?Thats it

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It is possible to create the reference variable of an Interface which is 100% abstract in nature.Then why it is not possible to create a reference of an Abstract class?

ViBi

• Apr 19th, 2015

It is possible "c# class Program { static void Main(string[] args) { MyBase b = new Derived(); Hocky h = new Hocky(); ...

arupc

• Feb 8th, 2015

This is the limitation of Abstract Keyword in C#.

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A) TrueB) False

ViBi

• Apr 19th, 2015

Two objects that are equal return hash codes that are equal. However, the reverse is not true: equal hash codes do not imply object equality, because different (unequal) objects can have identical hash codes

https://msdn.microsoft.com/en-us/library/system.object.gethashcode%28v=vs.110%29.aspx

regex

• Apr 7th, 2015

It is clearly false. Proof: "c class MyClass { public int _id; public MyClass(int id) { _id = id; } public bool Equals(MyC...

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A) System.Int16B) System.Int32C) System.Int64

shraddha Dohare

• Aug 3rd, 2015

System.Int32

Swaroop

• Jul 8th, 2015

System.Int32

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Skill/Topic: IntermediateA) YesB) No

Riki

• Aug 31st, 2015

Well, C# does not support multiple inheritance of behaviors or properties but we can inherit types implementing interfaces. And because a class can implement multiple interfaces so we can have multipl...

nyome san

• Jan 27th, 2015

No, C# does not support multiple inheritance.However, you can use interfaces to implement multiple inheritance.

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What are properties in C#? What are the advantages of using Properties ?

Riki

• Sep 1st, 2015

Properties are a level of abstraction to access private fields of a class and they are declare as public. Field are always private member of a class.

Sivavt

 Profile Answers by Sivavt Questions by Sivavt

• Mar 25th, 2012

Properties combine the behavior of method & variable.

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Vasyliy Zvarydchuk

 Profile Answers by Vasyliy Zvarydchuk Questions by Vasyliy Zvarydchuk

• Sep 5th, 2015

Structures are inherited from System.ValueType abstract class on IL level and code Console.WriteLine(base.ToString()) inside structure will return name of structure type.

Mohammad Sharib Khan

• Jan 7th, 2015

Http://stackoverflow.com/questions/1222935/why-dont-structs-support-inheritance

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Vasyliy Zvarydchuk

• Sep 5th, 2015

Encoding is a process of representation some information is optimal format for storing or transmission data. And serialization is representation some object or objects for transmission data between so...

Hardev Gangwar

• Jun 3rd, 2015

1- All three transform data into another format. 2- Both encoding and encryption are reversible. 3- encoding use Algorithm to encode and de-code the data. 4- encryption use Algorithm and key to encryp...

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Vasyliy Zvarydchuk

 Profile Answers by Vasyliy Zvarydchuk Questions by Vasyliy Zvarydchuk

• Sep 6th, 2015

1) Much better for multi-threading programming
2) Simpler implementation simpler that String Builder.
3) Its impossible to make all operation upon string without changing it.

Jeevan

• Apr 20th, 2012

People, please read the question before answering, don't just answer "Why" is the question - not "how".

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What is reflection and assembly?

Vasyliy Zvarydchuk

 Profile Answers by Vasyliy Zvarydchuk Questions by Vasyliy Zvarydchuk

• Sep 6th, 2015

Reflection is an API that allows programmatically getting access to .Net assembly and module metadata. An assembly is a group of .Net modules, resources and manifest. As a rule assembly is located in one file and has one .Net module.

Poornima

• Sep 12th, 2012

Fetching the assembly information at runtime

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A) [assembly]B) [ STA ]C) [ STAThread ]

ramya

• Oct 13th, 2015

[STAThread]

s

• Feb 17th, 2006

[STA] stands for Single Threaded Apartment.professional C#,3rd edition pg574

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Explain What are Object Oriented Language and Object Based Language

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Aarthy_SP  

 Profile Answers by Aarthy_SP Questions by Aarthy_SP

• Member Since Dec-2008 | Dec 10th, 2008

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Any langauge based on encapsulation concpet and operations with the objects are called as Object Based language. Exmaple : VB is a Object based and not an Object oriented

Any langauge based on encapsulation concept and operations with the objects and also dealing with the inheritance and polymorphism are called as Object Oriented language. Exmaple : C++,C#

Arpit Mandloi

• Nov 25th, 2015

Object Based languages: 1. Object-based language doesn't support all the features of OOPs like Polymorphism and Inheritance 2. Object-based language has in-built object like JavaScript has window obje...

Sivavt

 Profile Answers by Sivavt Questions by Sivavt

• Mar 27th, 2012

Object based languages do not support inheritance & dynamic binding. Example, VB

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