Dot Net Interview Questions for Freshers and Experience
Know the latest .net versions and Framework :
18 companies
.Net Framework Version
CLR Version
Feature
year
.Net 4.6.2
4
Cryptographic reports, WPF and windows forms to UWP
2016
.Net 4.6.1
4
Encrypting data in ADO.NET
2016
.Net 4.6
4
Asp.Net Core 5, Compilation using .net native, Event tracing
2015
.Net 4.5.2
4
New API’s
2015
.Net 4.5.1
4
Windows Phone Stores
2013
.Net 4.5
4
WPF,WCF,WF, ASP.NET
2012
.Net 4
4
Expended base class libraries, Cross platform development, MEF(Managed
Extensibility Framework)
2010
3.5
2.0
AJAX enabled erbsites,LINQ,Dynamic data
2008
3.0
2.0
WPF,WCF ,WF ( Workflow
Foundation),CardSpace
2008
2.0
2.0
Generics ,Asp.Net added
2005
1.1
1.1
Asp.net and Ado.net updated
2003
1.0
1.0
Windows Forms
2002
2) What is partial class? What is the difference between
Public and private class?
Public
Private
1)A Class which can access throughout the application under its
namespace
1)A Class(Private Constructor) which cannot be used outside the class
can implement interface
2)Can show outside
2)can have Public Interface.
3) The type or member can be accessed by any other code in the
same assembly or another assembly that references it.
3) The type or member can be accessed only by code in the same
class or struct.
Partial Classes and Methods (C# Programming Guide)
Visual Studio 2015. It is possible to split the definition of
a class or a struct, an interface or a method over two or more source
files. Each source file contains a section of the type or method definition,
and all parts are combined when the application is compiled.
What is webservices?
3) What is API?
4)What is constant menthod and extention methiod?
This keyword. An extension method uses the this-keyword in its parameter
list. It must be located in a static class. We often use special
"Extensions" classes.
An example. Here is a custom extension method. Usually you will want to
store your extension method class in a separate source file (like
ExtensionMethods.cs) in the project.
5)What difference bw stack and class?
6) What is abstract and interface?
Abstract class
Interface
1) Abstract class can have abstract and
non-abstract methods.
Interface can have only abstract methods.
2) Abstract class doesn't support multiple
inheritance.
Interface supports multiple inheritance.
3) Abstract class can have final, non-final, static
and non-static variables.
Interface has only static and final variables.
4) Abstract class can have static methods, main
method and constructor.
Interface can't have static methods, main method or
constructor.
5) Abstract class can provide the implementation of
interface.
Interface can't provide the implementation of
abstract class.
6) The abstract keyword is used to declare
abstract class.
The interface keyword is used to declare
interface.
7) Example:
public abstract class Shape{
public abstract void draw();
}
Example:
public interface Drawable{
void draw();
}
7)What is angular js ?
7.1)Project life cycle :
1) Primitive and no primitive data types?
It's a best practice to have at least three layers in a system.
3-tier architecture is general architecture in software development and it
consists of
3)Ajax tool Kit
4)Front End Angular Js
A)In real time web services are called as asmx webservices
7)what is constant method and extended method?
8)what is Convert.tostring() and .totostring?
9) what is view state/
10)Angular Js ,MVC, ASP.net and differences?
A)
View state (Method): Client side execution
Session (Variable): State Management
1)View Page can only access data with in the same page, it cannot be
accessed or redirected to another page
1) Session Variable can access across the pages
2)the value will be placed in the hidden class in the client side (i.e.,
Encoded view state)
2)It Stores all the data on the service and the session id key is
stored in cookie, If cookies are disabled you can pass Session Id key as a URL
query by passing AutoDetect in webconfig file
3) Not Safe to store any kind of information in view state
3) Safe because the data is saved in the server
107) Compilation Types:
88) What is inner joint and left joint?
Technologies?
This Project makes HR Information very sensitive and important
to use, can handle the employees information easier
4) Vehicle
Insurance Policy
91) What is WCF?
Class
struct
1) Class
is a reference type ,it stores in heap memory(dynamic memory allocation
i.e.,Object creation) ,By default Private
1) Struct
is a value type , it stores in stack memory(Static Memory allocation i.e.,
Stores values), By default Public
struct MyStruct
void ChangeMyStruct(MyStruct input)
...
// Create
value type
ChangeMyStruct(testStruct);
// Value
of testStruct.MyProperty is still "initial value"
class MyClass
void ChangeMyClass(MyClass input)
...
// Create
reference type
ChangeMyClass(testClass);
// Value
of testClass.MyProperty is now "new value"
103) Where did you implement angular Js?
Headerstyle:””,
- ViewData is used to pass data
from controller to view
- It is derived from
ViewDataDictionary class
- It is available for the current
request only
- Requires typecasting for
complex data type and checks for null values to avoid error
- If redirection occurs, then its
value becomes null
ViewBag
- ViewBag is also used to
pass data from the controller to the respective view
- ViewBag is a dynamic
property that takes advantage of the new dynamic features in C# 4.0
- It is also available for the
current request only
- If redirection occurs, then its
value becomes null
- Doesn’t require typecasting for
complex data type
TempData
- TempData is derived from
TempDataDictionary class
- TempData is used to pass
data from the current request to the next request
- It keeps the information for
the time of an HTTP Request. This means only from one page to another. It
helps to maintain the data when we move from one controller to another
controller or from one action to another action
- It requires typecasting for
complex data type and checks for null values to avoid error. Generally, it
is used to store only one time messages like the error messages and
validation messages
108) 301 and 302 redirection?
18 companies
Not as definition but with example is must.
1) What are the versions in .net?
A)
.Net Framework Version
|
CLR Version
|
Feature
|
year
|
.Net 4.6.2
|
4
|
Cryptographic reports, WPF and windows forms to UWP
|
2016
|
.Net 4.6.1
|
4
|
Encrypting data in ADO.NET
|
2016
|
.Net 4.6
|
4
|
Asp.Net Core 5, Compilation using .net native, Event tracing
|
2015
|
.Net 4.5.2
|
4
|
New API’s
|
2015
|
.Net 4.5.1
|
4
|
Windows Phone Stores
|
2013
|
.Net 4.5
|
4
|
WPF,WCF,WF, ASP.NET
|
2012
|
.Net 4
|
4
|
Expended base class libraries, Cross platform development, MEF(Managed
Extensibility Framework)
|
2010
|
3.5
|
2.0
|
AJAX enabled erbsites,LINQ,Dynamic data
|
2008
|
3.0
|
2.0
|
WPF,WCF ,WF ( Workflow
Foundation),CardSpace
|
2008
|
2.0
|
2.0
|
Generics ,Asp.Net added
|
2005
|
1.1
|
1.1
|
Asp.net and Ado.net updated
|
2003
|
1.0
|
1.0
|
Windows Forms
|
2002
|
2) What is partial class? What is the difference between
Public and private class?
Public
|
Private
|
1)A Class which can access throughout the application under its
namespace
|
1)A Class(Private Constructor) which cannot be used outside the class
can implement interface
|
2)Can show outside
|
2)can have Public Interface.
|
3) The type or member can be accessed by any other code in the
same assembly or another assembly that references it.
|
3) The type or member can be accessed only by code in the same
class or struct.
|
Partial Classes and Methods (C# Programming Guide)
Visual Studio 2015. It is possible to split the definition of
a class or a struct, an interface or a method over two or more source
files. Each source file contains a section of the type or method definition,
and all parts are combined when the application is compiled.
What is webservices?
A web service is any piece of software that makes
itself available over the internet and uses a standardized XML messaging
system. XML is used to encode all communications to a web service. For
example, a client invokes a web service by sending an XML message,
then waits for a corresponding XML response.
3) What is API?
Application program interface (API) is a set of routines,
protocols, and tools for building software applications.
An API specifies how software components should interact
and APIs are used when programming graphical user interface (GUI)
components.
4)What is constant menthod and extention methiod?
A) int func_that_does_not_modify_this(int arg) const {}
Placing const at the end of the function prevents
you from accidentally modifying any of the internal properties, and lets the
caller know that this function won't modify the object.
Is there a concept like this in C#?
Extension. An extension method has simplified calling
syntax. It represents a static method as an instance method. Extension methods
can lead to simpler syntax.
This keyword. An extension method uses the this-keyword in its parameter list. It must be located in a static class. We often use special "Extensions" classes.
An example. Here is a custom extension method. Usually you will want to store your extension method class in a separate source file (like ExtensionMethods.cs) in the project.
This keyword. An extension method uses the this-keyword in its parameter list. It must be located in a static class. We often use special "Extensions" classes.
An example. Here is a custom extension method. Usually you will want to store your extension method class in a separate source file (like ExtensionMethods.cs) in the project.
5)What difference bw stack and class?
In .NET, there are two categories of types, reference
types and value types.
Structs are value types and classes
are reference types.
The general difference is that a reference
type lives on the heap, and a value type lives inline, that is,
wherever it is your variable or field is defined.
A variable containing a value type contains the
entire value type value. For a struct, that means that the variable
contains the entire struct, with all its fields.
A variable containing a reference type contains a
pointer, or a reference to somewhere else in memory where the actual
value resides.
6) What is abstract and interface?
Abstract class
|
Interface
|
1) Abstract class can have abstract and
non-abstract methods.
|
Interface can have only abstract methods.
|
2) Abstract class doesn't support multiple
inheritance.
|
Interface supports multiple inheritance.
|
3) Abstract class can have final, non-final, static
and non-static variables.
|
Interface has only static and final variables.
|
4) Abstract class can have static methods, main
method and constructor.
|
Interface can't have static methods, main method or
constructor.
|
5) Abstract class can provide the implementation of
interface.
|
Interface can't provide the implementation of
abstract class.
|
6) The abstract keyword is used to declare
abstract class.
|
The interface keyword is used to declare
interface.
|
7) Example:
public abstract class Shape{ public abstract void draw(); } |
Example:
public interface Drawable{ void draw(); } |
7)What is angular js ?
AngularJS is a structural framework for dynamic web
apps. It lets you use HTML as your template language and lets you extend HTML's
syntax to express your application's components clearly and
succinctly. Angular's data binding and dependency injection eliminate
much of the code you would otherwise have to write.
7.1)Project life cycle :
8) What are win forms?
A.navigation, search. This API is a part of .NET Framework
3.0. Windows Forms (Win Forms) is a graphical (GUI) class library included as a
part of Microsoft .NET Framework, providing a platform to write rich client
applications for desktop, laptop, and tablet PCs.
1) Primitive and no primitive data types?
A) 1. primitive types (or) predefined
Ex: byte, short, int, float, double, long ,char, bool,
DateTime, string, object etc..
2. non-primitive types (or) User Defined
Ex: class , struct , enum , interface, delegate,
array.
struct , enum are Value Types
class, interface, delegate, string, object and array are referral types.
2) Single-tire ,N-tire ,Multi-tire
A) N-Layer, what should be the minimum value for N?
It's a best practice to have at least three layers in a system.
Layer 1 - Presentation Layer - Which contains you UI.
Layer 2 - Business Domain - Which contain Business Logic.
Layer 3 - Database Access layer
3-tier architecture is general architecture in software development and it consists of
Presentation layer (client browser)
Application or Business logic layer
Data Layer
N-tier architecture in .Net
The main difference is that n-tier arch got 2 extra layers.
Example on data layers one part of developers are SQL developers whose work on
DB server (making DB structure, writing Stored procedures and so forth), and
.Net developers whose work on consuming that stored procedures and making
abstraction ( implementing repository pattern)...
3)Ajax tool Kit
A) Open Source Library for Web Development
4)Front End Angular Js
A)
5)Web Services
A)In real time web services are called as asmx webservices
6)Version Control Tools
A)SVN:opensource software handles all the changes made by
your source code(tracks all the files
,folders,directories,and modufication),
Update,Comment,Checkout,Import
TFS:
GIT:
7)what is constant method and extended method?
A)
8)what is Convert.tostring() and .totostring?
A)
9) what is view state/
A) In Asp.Net we have Runat="Server" to make
controls like Textbox,Checkbox...
In ASP.Net MVC No view state and PostBack
10)Angular Js ,MVC, ASP.net and differences?
A)
11)oops concept definations with examples?
A)
12)Diff between class and object?
A)
13)what is constructor , polymorphism, abstraction and inheritance?
A)
14) difference between ASP and ASP.Net?
A)
15)difference between ADO and ADO.Net?
A)
16)Tell Me about your project?
A)
17)diff between stored procedure and functions?
A)
18)what is DataType and DataSet?
A)
19)Attributes in asp.net?
A)
20)Asp.net Life Cycle?
A)
21)Difference between HTML and HTML5?
A)
22)platforms to write .net program tools?
A)
23)which one is better Asp.net or MVC?
A)
24)what is iis?
A)
25)what is ssl?
A)
26)what is memory and garbage collector?
A)
27)what is SDLC?
A)
28)what is Boxing and unboxing?
A)
29)what is sessions and how many types of sessions are there
?
A)
30)what is Asp.net life cycle?
A)
31)Lean MVC and Angular js?
A)
32)what are web services? , webservices will work with
internet or not?
A)
33)what are user controls and custome controls?
A)
34)what are validations and how many types of validations
are there?
A?)
35)what are filters in MVC?
A)
36)what is the difference between internet and intranet
applications?
A)
37)what are the real time difference between .Net Framework
versions?
A)
38)Difference between DataReader and adapter, scalar?
A)
39)what is the default connection present in WEBCONFIG file?
A)
40)what is Common Language Runtime? And CLS with real time
experience?
A)
41)what are the version of webAPI?
A)
42)what is the state in sql server?
A)
43)what is left join and right join?
A)
44)what are stored procedure and 15 examples?
A)
45)what is Dataaccess layer and Business access layer?
A)
46)what is Xaml and Aspx?
A)
47) what is the difference between cluster and non cluster
index?
A)
48) what is as and is in C# development?
A)
49) what is HTTPdoublePost ? and have we use in .Net MVC?
A)
50)what is dependency injection ? and how to over come it?
A)
51)what is sql injection? How to over come it?
A)
52)what is HTTPGET and HTTPPOST?
A)
53)Can one view have different controlers in MVC/
A)
54)how to transfer on table data in to another table in sql?
A)with two examples.
55)what is stack,queue,list in MVC?
A)
56)Grids in MVC and Angular JS?
A)
57)what is the difference between
A)
58)versions in visual studio?
A)
59) Difference between web services and wcf?
A)
60) What is Web API?
A)
61) Steps to do SVN and TFS?
A)
62) Entity Framework?
A)
63) How to create user controls?
A)
64) What is session management, types?
A)
65) What is causing in .net C#?
A)
66) What are security levels in .net frame work?
A)
67) How did you work on unit testing, and how many types of
testing are there in .net?
A)
68) Differentiate between page load and control load?
A)
69) How to create xml, and develop using xml in .net?
A)
70) Simple LINQ definition with sql crud?
A)
71) Types of errors in .net?
A) 1) Custom errors:
A: Application l
72) What are Cristal reports?
A)
73) writing data from xml to sql server and sql to xml?
A)
74) SSIS, SSRS, SSMS, SSI, SSL?
A)
75) What is global.ascx?
A)
76) Project documentation, support documentation, end –user requirements,
control documentation?
A)
77) Ajax controls, sessions, user control sample program?
A)
78) Stored procedures CRUD, Using functions, Joints,
grouping 4 queries?
A)
79) Triggers query (no necessary)?
A)
80) Stored procedure inside a stored procedure?
A)
81) Email subscription and sending program?
A)
82) What Sapp messaging using .net (Not necessary when you
are booked only)?
A)
83) Write a small program using xml as a front end coding?
A)
84) Use security in between the coding?
A)
85) Threading and exception handling?
A)
86) Prepare a support documentation?
A)
87) Difference between session and view state?
A)
View state (Method): Client side execution
|
Session (Variable): State Management
|
1)View Page can only access data with in the same page, it cannot be
accessed or redirected to another page
|
1) Session Variable can access across the pages
|
2)the value will be placed in the hidden class in the client side (i.e.,
Encoded view state)
|
2)It Stores all the data on the service and the session id key is
stored in cookie, If cookies are disabled you can pass Session Id key as a URL
query by passing AutoDetect in webconfig file
|
3) Not Safe to store any kind of information in view state
|
3) Safe because the data is saved in the server
|
107) Compilation Types:
1)
Debug Pointer search:
i)
Right Click on the running debug point and click
Quick Watch you can see the values which will display and you can cross check
by simply placing cursor in the property.
ii)
88) What is inner joint and left joint?
A)
89) Control Binding in Angular JS?
A)
90) Projects
Explain your overall project?
1)
The Human Resource information system is
comprehensive employee’s web application that allows you to store employee
information in comprehensive employee database, and this database is
interlinked with other module called HRMS(Iwowsoft) so there is no need to
maintain multi set of database, It stores all the information of employee profile
,new applicant ,claim management ,leaves ,new bees profile , medical checkup , There
are many features that helps you to minimize manual and repetitive
tasks, thus saving time and improve efficiency.
Technologies?
The technologies we used in our project is Asp.net
4.0/4.5, C# 4.5, Html5 and Css3, JQuery , JQuery using AJAX for
automation and backend as SQL Server database. I involved mostly
in development of Business Access Layer and Date Access Layer, this is the new
framework which I have implemented from my previous company
This Project makes HR Information very sensitive and important
to use, can handle the employees information easier
2)
The Task Allocation is an
internet based application which focus on the coordination and communication of
higher authorities (Project Manager, Tech Lead, etc.) with different software
developers. This project is intended to develop online projects schedule and
management.
Task Allocation support project managers in the
implementation of the functions required to achieve successful project completion.
This project deals with gain immediate insight into enterprise activity with
access to real time data. Project Health Status Indicators gives access project
status quickly and accurately with completed tasks and in
completed task module. Task Scheduler shows scheduling
the tasks in monthly and weekly format.
Technologies?
The technologies we used in our project is Asp.net
4.0/4.5, C# 4.5, Html and Css, JavaScript, Selenium using C# for
automation and backend as SQL Server database. I involved in developing
Front End and Back End applications, this is the new framework which I have implemented
from my previous company.
This project is very useful to our company to handle the
projects, and complete the project in time
3)
The Enterprise resource planning is a business
process management software that allows an organization to use a system of
integrated applications to manage the business and automate many back office
functions related to technology services and human resources.
Human Resource Management
(SAP HRM), also known as Human Resource (HR)
Production Planning (SAP
PP)
Material
Management (SAP MM)
Financial Supply Chain
Management (SAP FSCM)
Sales and Distribution
(SAP SD)
Project System (SAP PS)
Financial Accounting and
Controlling (SAP FICO)
4) Vehicle
Insurance Policy
5) AHMP
Hospitality
91) What is WCF?
92) What is Restful service?
93) Prepare a project document and task document from client
and from project manager?
94) Example for multiple views in one page? (Difference asp.net,
MVC, Angular JS)
95) Flow to write database logic in MVC, Angular, ASP.net
using services or data access layer?
A) MVC: (Compile using VS Compiler)
1)
Create controller with razon view engine
2)
Add database table in App_data
3)
Create Ado.Net Entity Framework with namespace
to your table
4)
Create action method to your table i.e., create
object for your dB using namespace and call the values
5)
Create view bag for avoiding typecasting and
easy execution with new features in .Net framework 4.0 and call Web grid to
show the database table in grid using grid properties.
6)
Create an html tag to bind the columns.
Angular: (Compile using Browser
Console)
1)
Create a new project
2)
Add class and write the properties {get; set;}
3)
Add Asp.Net web service and write database logic
for displaying data
4)
Create a $http in controller function ($http.post
and $http.get will help you to execute the web service) and write directive scope to display values
5)
Create html table and bind the columns using
ng-controller directives
Asp.Net: (Best Compiling using VS)
1)
DataAccessLayer()
2)
Asp.Net Web service()
3)
Entity Framework using Linq
4)
Xml using Linq
5)
WCF, and Other Web Services.
96) What is agile (a jail) development methodology? (No so
easy to be an agile development)
A)
·
It’s a type of project manager (executing how
should be the project execution and planning) Simple it is a methodology
·
Iterative :
it is Type Cycle repeating the process ( Example : Using same Blue print
of a project )
·
Streamlined: Preparing documentation, code
execution, Meetings all times.
·
Time-Boxing: Planning your work in time
(Structured Feature A-B-C in 3 weeks) ,3 weeks of development we concentrate on
time not on features
·
Very Collaborative i.e., fast moving process.
97) What is sql script? (Creating a script)
A) Maintaining all the Database Table data in a script is
called a Sql Script, We can Export the tables data into script and import the
data and execute to create database tables with populated data.
98) Steps to create crystal report and see there are any
other reports to create?
·
Install sap crystal reports IDE search in Sap
official website (scn.sap.com/docs/DOC-7824).
·
Look on database , If you want to create report
for a table (Employee) follows steps
·
Create view by right clicking on view and select
a table (Employee) and save it with some name.
·
New Project – New Web Application
·
Go to Toolbox and add Cristal Report Viewer on
the
·
Note : If you are not Seeing Cristal reporting
Viewer on Toolbox Go to properties – and change Target Framework to .net
framework 4.0
·
Add Dataset on RK the project it provides the
structure of the data (Drag and Drop the View created on the dataset).
·
Add Crystal reports on RK the project and select
all the columns of the table
·
Then Header will appear
·
Change the text in the header page and Footer
page on cristialreport viewer
·
Go to default aspx page and write the sql
connection and bind the values to Cristal report viewer.
99) One view has to display in two buttons?
100) why do use LINQ (Linear Integrated Query Language):
Generics-arrays-filtering and sorting with out execution
A) Single line of statement, communicating between two, it
is used with differ data source, no need to execute across dB
1.
Creating sp that to connect table : To replace
the employee with all details in same position
2.
Writing sp to update dB table i.e., stored
procedure for replacing the employee
101) reverse of the word “Mohan” “nahoM”
102) Difference between Class and struct?
Class
|
struct
|
1) Class
is a reference type ,it stores in heap memory(dynamic memory allocation
i.e.,Object creation) ,By default Private
|
1) Struct
is a value type , it stores in stack memory(Static Memory allocation i.e.,
Stores values), By default Public
|
struct MyStruct
{
string MyProperty { get; set; }
}
void ChangeMyStruct(MyStruct input)
{
input.MyProperty = "new
value";
}
...
// Create
value type
MyStruct testStruct = new MyStruct { MyProperty = "initial
value" };
ChangeMyStruct(testStruct);
// Value
of testStruct.MyProperty is still "initial value"
// - the
method changed a new copy of the structure.
Bcz struct doest have nulls , methods
will be null parameters
|
class MyClass
{
string MyProperty { get; set; }
}
void ChangeMyClass(MyClass input)
{
input.MyProperty = "new
value";
}
...
// Create
reference type
MyClass testClass = new MyClass { MyProperty = "initial
value" };
ChangeMyClass(testClass);
// Value
of testClass.MyProperty is now "new value"
// - the
method changed the instance passed.
The reference point out nulls
and it will read the
Value by creating instance
|
103) Where did you implement angular Js?
JavaScript animations?
105) Best web sites to learn .net?
106) Types of grid used in asp.net, Mvc ,Angular ?
MVC: use webgrid
Example
@{
Viewbage.title=”List of xyz”;
Var grid=new webgrid(Source: Model, canpage: true,
rowperpage:10);
Grid.pager(Webgridpagermodes.all);
}
<style>css styles</style>
<div>
Grid.gethtml{
tablestyle:””,
Headerstyle:””,
Footerstyle:””,
Alternatingrowstyle:””,
Rowstyle:””,
Columns:grid.columns((grid.column(header:, footer:),…….))
}}
107) Difference between ViewBage and viewData and tempdate?
A) ViewData
- ViewData is used to pass data
from controller to view
- It is derived from
ViewDataDictionary class
- It is available for the current
request only
- Requires typecasting for
complex data type and checks for null values to avoid error
- If redirection occurs, then its
value becomes null
ViewBag
- ViewBag is also used to
pass data from the controller to the respective view
- ViewBag is a dynamic
property that takes advantage of the new dynamic features in C# 4.0
- It is also available for the
current request only
- If redirection occurs, then its
value becomes null
- Doesn’t require typecasting for
complex data type
TempData
- TempData is derived from
TempDataDictionary class
- TempData is used to pass
data from the current request to the next request
- It keeps the information for
the time of an HTTP Request. This means only from one page to another. It
helps to maintain the data when we move from one controller to another
controller or from one action to another action
- It requires typecasting for
complex data type and checks for null values to avoid error. Generally, it
is used to store only one time messages like the error messages and
validation messages
108) 301 and 302 redirection?
Hi mohan I want the full answer's for all questions can you please sendme
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