.NET INTERVIEW QUESTIONS PDF
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Dot net 3. It's now and from last few years phone interviews also known as Though these questions mostly for less experienced developer e. Given it's huge popularity, jQuery interview questions are increasingly asked in but they are mostly suited for web developers with 2 to 5 years of experience.
September 14, First round: Coding round hosted on hackerrank. Consisted of 4 questions of varying. Software Developer and have around 5 years of experience. Net Interview Questions And Answers, mvc interview questions, mvc c interview 5. What is ViewResult?
When to use transport security and when to use message security? When to use data May be the interviewer did not satisfied with my answers. JPA Mini Book. JVM Troubleshooting Guide.
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Related Papers. Using parsing we can convert from only string data type to any other data type except object data type. Converting 2. Using converting we can convert from any data type to any other data type. Parse s1 ; Console. Parse s5 ; Console. Difference between int. Parse and Convert. A Int. Parse 1. ToInt32 1. Using this we can convert from any data type value into INT. What is Boxing and Unboxing? What is the difference between Convert. ToString and Tostring?
A Convert. When we implement modifications to the existing String object within memory it will create a new object. When we implement modifications to the existing StringBuilder object will not create new copy of object instead of that it will modify the existing object. StringBuilder class will have a method Append this method is used to insert the new value on the existing value.
It will occupy more memory, it will decrease the performance of applications. Append Tech ; Console. WriteLine s1 ; 3. It will occupy less memory, it will improve the performance of applications. WriteLine s1. GetHashCode ; Console. WriteLine s2. GetHashCode ; s2. Append "Bad" ; Console. What is Error, Bug and Defect?
Why class and object? When we will go for instance variable? When we will go for static variable? Difference between instance variable and static variable? Instance variable will create multiple times for every object creation. Instance variable value will be differs from one object to another object. Static variable will create only once when the class is loading. When we will go for readonly? A Whenever filed is required for every object with the different value, but the value not required change.
When we will go for static readonly? Difference between static variable and static read only? A Whenever we want to have common value for every object and value should not be changed forever we will go for static readonly. Its value cannot be changed 3. By default constant is static that means we dont require to use any static keyword 4.
Constant value should be initialized at the time of declaration which we cannot initialize in runtime. Its value can be changed 3. For static variable, programmer has to declare as static. Readonly keyword 2. Its value cannot be modified 3. By default Non-static. Static variable can be initialized at the time of declaration as well as we can initialize in runtime within the static constructor.
Readonly can be initialized at the time of declaration or runtime only within the constructor. A Purpose of Constructor: To initialize at the time of creating an object for Instance variable as well as at the time class is loading for static variable.
Purpose of Method: To perform operations on state. A To perform operations on Instance variables. A While defining method if that method is not required to access instance variables we will define particular method as static method. A Static constructor executes at the time of class loading. There is no need to pass values explicitly, so it doesn't have parameters. A Default access modifier of class members is private.
Default access modifier of a class is internal. A When we call instance constructor first it will call object class constructor. A this: It is a keyword which is representing current class object or instance. Using this we can invoke current class instance members. It is a keyword which is representing the super class instance. Using base keyword we can access super class instance members from derived class or sub class.
A this 43 What is constructor overloading?
A Implementing multiple constructors within a single class with different signature Different no. A Whenever one class constructor is invoking another class constructor which is called as constructor chaining.
For this we can use Base. If the Main is a instance method again it requires object. To overcome this Main is defined as static method. How many types? Net will support passing parameter mechanism in 3 ways. Call by value or Pass by value 2. Call by reference or pass by reference 3.
Call by Out or pass by out. Ref keyword is used 2. Ref parameter should have some value. Out keyword is used 2. Out parameter is not required to have value. Encapsulation 2.
Abstraction 3. Inheritance 4. How can we achieve? Abstractions are 2 types. Hiding unwanted data is called as data abstraction 2 Method abstraction: Invoking required method and hiding unwanted method is called as method abstraction. Types of Inheritance? Net will support 5 types of Inheritance. Single Inheritance 2.
Multi-level Inheritance 3. Multiple Inheritance 4. Hierarchical Inheritance 5. Hybrid Inheritance. Net will support multiple Inheritance? When we will go for sealed class? It cannot be inherited. Whenever we want to restrict to inherit a class we can go for sealed class.
It cannot be instantiated. Cant be inherited. It can be instantiated we can create object for sealed class 3. It is reference type 2. It will support inheritance 5. Instance field intailzers are allowed. It is value type 2. It will not support inheritance 5. Instance field intializers are not allowed. It can contain explicit default constructor 7.
We cant create an object for class with out using new keyword. We can have static, abstract, sealed class. We can implement overloading and overrding with in class. It cant contain explictit default constructor 7.
We can create an object for structure with out using new key word if it is not having instance varibles. We cant have static, abstract, sealed structure. We can implement overloading with in structure, but we cant implement overriding with in structure. To assign value to a class level variable after creating object to retrieve the value from class level variable individually.
It is used to initialize the instance variables at the time of creating an object. It is used to assign value to class level variables as well as can retrieve the value from class level variables. Types of polymorphism?
A Polymorphism means one name many forms. It is of 2 types: Static Polymorphism or Compile Time Polymorphism 2. Dynamic Polymorphism or Runtime Polymorphism. When we will go for function overloading? Having multiple methods with the same name but a different no.
When we will go for function overriding? Having multiple methods with the same name and with the same signature in a combination of base and derived class. Whenever we want to implement a method in multiple classes with the different behavior we can go for method overloading. Multiple methods with the same name and different signature. It can implement in a single class and combination of base and derived class. No keywords are used 4. Both functions return types can be same or differ.
It is a compile time polymorphism 6. We can overload static methods 7. Constructors can be overload. Multiple methods with the same name and same signature. To implement override we should go for base and derived class, we cannot implement in single class.
Both functions return types should be same. It is a Run time polymorphism 6. We cannot override static methods 7. Constructors cannot be overload. A Whenever we want to implement some methods in current class and some methods we want declare in current class which we want to implement in future classes then we have to declare that class as abstract class.
A Whenever we want to declare all the members in current class and want to implement all the members in future classes then we will declare particular class as interface. A Not required Because is abstract class is a partial implemented class and interface has no implementation. Even though these abstract class abstract members and interface members should implement within the derived classes.
Due to that reason we dont required to create object for abstract class and interface. We will create an object for derived class and using that object we can access abstract members and interface members. It is a collection of abstract members and non-abstract members. While defining an abstract class, abstract keyword is used. It is partially implemented 4. While implementing abstract class members with in the derived class we have to use override keyword. It is collection of abstract members, that means by default interface members are abstract.
While defining an interface, interface keyword is used. No implementation 4. We cant implement a property and method.
While implementing interface members with in the derived class we dont required to user override key word. Reusability 2. Extensibility 3. Re-implementation 4.
Modularity 5. Easy to modify 6. Easy to implement real world programming 7. A To handle runtime error, when a runtime error is occurred to avoid abnormal termination by displaying user-friendly error messages. We have to write the statements which may throw an error. We will write the statements to display user friendly messages to the user to give more clarity to the user regarding error.
A Yes. Types of delegates? Delegate object can hold the address of a function and can invoke a function. Delegates are reference types. Delegates are of 2 types 1. Single cast Delegate and 2. Multi Cast Delegate. NET language independent technology? Net is supporting for multiple languages. While developing an application by using one.
For example: While developing C. Net application we can use vb. As well as while developing VB. Net application we can use C. Net component.
Due to that reason we can say that. Types of assemblies? A An Assembly is a unit of code which provides versioning and deployment.
Assemblies are of 2 types: Private Assembly and 2. Shared Assembly. A exe 1. File extension will be.
DOT NET Interview Questions and Answers --
Collection of classes which has Main will produce exe files. Net Console application. It will depend on some other application for execution for execution.
Collection of classes which is not having Main will produce dll files. Net class library project. It will create a local copy within every client application folder, that local copy will provide the services to concern client application. It will not create a local copy, it will provide services to multiple client application from a centralized shared folder called GAC.
When we install. How to create strong name? A It is one of the. NET Framework utility, which is representing with a file called sn. Using this utility we can give a strong name or public key to the given assembly.
Strong name or public key will give uniqueness to given assembly among collection of assemblies. It is represented with a file called GACutil.
Using this utility we can install an assembly into GAC folder Syntax: A Informing about created strong name to the assembly is nothing but signing the assembly. A An assembly which we can use to develop multi lingual applications in. A An application that supports for more than one human readable language is known as multilingual application. A Reflection is used to get the information about an assembly programmatically by writing some code.
What is the default data type of enum? A Enum is a value type. It is a collection of constants that means it is a collection of string constants which are representing collection of integer constants.
Int is the default data type of enum. A Generics allow us to define type-safe data structures, without committing to actual data types. A We can avoid function overloading in some level. A Collections are of 2 types: Normal Collection and 2. Generic Collection.
The Dictionary class is a generic class and can store any data types. It is a collection of Pairs. Each pair will have 2 elements: Key value and 2. Item Value. Every item should be represented with one unique key value. A If we want to add a method comment you can just place your cursor on an empty line above one of your method and insert 3 slashes which will insert a comment block for you to fill out.
Scroll down the list until you find "System. Forms", click it and then click OK 4. Using System. Forms; 5. Now go to the main function MessageBox. Show "Hello World" ; 6. Why partial class? Partial class will split into multiple class files but the class name will be same but class files names should be differ.
In asp. A Thread is an independent execution path, it able to run simultaneously with other execution paths. A Whenever we want to create a thread, we have to create an object for thread pre-defined class. A Using thr1. Start ; Start: It is a pre-defined member method of thread class. Using this method we can invoke or start a thread. Threadstart is a pre-defined delegate, which is a part of System. Threading base class library. We can initialize a method to thread with the help of ThreadStart.
A Using Thread. Sleep method is used to Block the current thread for the specified number of milliseconds. In other words We can include specific time via thread. Sleep TimeSpan. A Using Suspend we can suspend the targeted thread. When you call Thread. Suspend on a thread, the system notes that a thread suspension has been requested and allows the thread to execute until it has reached a safe point before actually suspending the thread.
A safe point for a thread is a point in its execution at which garbage collection can be performed. Once a safe point is reached, the runtime guarantees that the suspended thread will not make any further progress in managed code. A thread executing outside managed code is always safe for garbage collection, and its execution continues until it attempts to resume execution of managed code.
A Suspended thread can be called back by using resume. A The Thread. Abort method is used to start the process of terminating the thread. ThreadingAbortException in the thread on which it is invoked. A Using GC. Collect ; The garbage collection class provides the GC. Collect ; which you can use to give your application some direct control over the garbage collector.
In general, you should avoid calling any of the collect methods and allow the garbage collector to run independently. A These are just like any other methods in the class and can be called explicitly but they have a special purpose of cleaning up the object.
In the dispose method we write clean up code for the object. It is important that we freed up all the unmanaged recources in the dispose method like database connection, files etc. The class implementing dispose method should implement IDisposable interface. A Dispose method should call the GC. SuppressFinalize method for the object it is disposing if the class has desturctor because it has already done the work to clean up the object, then it is not necessary for the garbage collector to call the object's Finalize method.
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A Finalize method acts as a safeguard to clean up resources in the event that your Dispose method is not called. You should only implement a Finalize method to clean up unmanaged resources.
You should not implement a Finalize method for managed objects, because the garbage collector cleans up managed resources automatically. Finalize method is called by the GC implicitly therefore you can not call it from your code. In C , Finalize method cannot be override, so you have to use destructor whose internal implementation will override the Finalize method in MSIL. But in the VB. NET, Finalize method can be override because it does support destructor method.
What is ASP. Why asp. NET is a. NET web technology or Server side technology. To develop a web application by using. Net we have to use a. Net web technology called Asp.
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Net and a. Net language called C. What do you mean by server side technology? Server side code we can implement by using Server side technologies. Using server side technology we can develop server side web pages. What do you mean by client side technology? Client side code we can implement by using client side technologies. What are the programming techniques will be supporting by asp.
A Asp. They are1. InPage Technique and 2. CodeBehing Technique.
Can we convert client side control as a server side control? Can we convert server side control as client side control? But we cannot convert server side control as client side control.
How can you pass values between ASP. The class which derives functionality from a base class is called a derived class. State management is a technique that is used to manage a state of an object on different request. It is very important to manage state in any web application.
There are two types of state management systems in ASP. This property returns a true value if a Data Reader is closed, otherwise a false value is returned. NET validation controls define an important role in validating the user input data. Whenever the user gives the input, it must always be validated before sending it across to various layers of an application.
If we get the user input with validation, then chances are that we are sending the wrong data. So, validation is a good idea to do whenever we are taking input from the user. When validation is done on the client browser, then it is known as Client-Side Validation. When validation occurs on the server, then it is known as Server-Side Validation.
Server-Side Validation is a secure form of validation.
2018 Latest Dot Net Interview Questions And Answers Pdf
The main advantage of Server-Side Validation is if the user somehow bypasses the Client-Side Validation, we can still catch the problem on server-side. There must be multiple processes to share the same connection describing the same parameters and security settings. The connection string must be identical. Cookie can store only string value. Cookies are browser dependent. Cookies are not secure. Cookies can store only small amount of data. IL stands for Intermediate Language.
NET source codes are first compiled to IL. View State is the method to preserve the Value of the Page and Controls between round trips. It is a Page-Level State Management technique. View State is turned on by default and normally serializes the data in every control on the page regardless of whether it is actually used during a post-back. A web application is stateless. That means that a new instance of a page is created every time when we make a request to the server to get the page and after the round trip our page has been lost immediately.
These are the main features of view state: Retains the value of the Control after post-back without using a session. Stores the value of Pages and Control Properties defined in the page. Advantages of View State. Easy to Implement.
No server resources are required: The View State is contained in a structure within the page load. Enhanced security features: It can be encoded and compressed or Unicode implementation. What are the different Session state management options available in ASP.
In traditional Web programming, all information that is associated with the page, along with the controls on the page, would be lost with each roundtrip. The Microsoft ASP. NET framework includes several options to help you preserve data on both a per-page basis and an application-wide basis. These options can be broadly divided into the following two categories:. Server-side state management enables you to manage application-related and session-related information on the server.
When a class type is derived from another class type such that it inherits all the members of the base type it is Implementation Inheritance.
When a type class or a struct inherits only the signatures of the functions from another type it is Interface Inheritance. In general Classes can be derived from another class, hence support Implementation inheritance. At the same time Classes can also be derived from one or more interfaces. Hence they support Interface inheritance.
In VB. NET you use the NotInheritable modifier to prevent programmers from using the class as a base class. In C , use the sealed keyword. Once the connection is closed, it returns back to the pool. This allows the connections to be reused.
Skip to content 1. What is the managed and unmanaged code in. What are the memory-mapped files? The GridView control supports the following features: Creating a GridView 4. What is the difference between ASP. The following are some important points of the ASP. What are the defining traits of an object-oriented language? How can we apply themes in ASP. NET application? Themes are of two types: Global Theme A Global theme is a theme that is applied to all the web sites on a web server and includes property settings, and graphics.
Which method do you use to enforce garbage collection in. The System. Collect method. What are the different types of indexes in. There are two types of indexes in. Clustered index and non-clustered index How can you identify that the page is post back?
What is the full form of ADO? What is Click Once? What is Ajax in ASP. What is the global assembly cache GAC? What is the use of Error Provider Control in. These fields will empty initially as shown below, The following actions will be taken place when a user changes a control that has the AutoPostBack property set to true: Follow these steps: Session always use background cookie.
This is default. Session uses background cookie if browser supports cookies else URL is used. How is it possible for. NET to support many languages? What is Themes in ASP. How to apply themes There are 3 different options to apply themes to our website: What are the Navigations technique in ASP. We will discuss the following techniques in this article. Redirect Server. Transfer Server. Exceute Cross page posting What is master page in ASP. A master page is defined using the following code: Footer… What is tracing in.
Tracing has the following important features: What are the data controls available in ASP. Data binding uses a special syntax: Data Bind Control can display data in connected and disconnected model.
Following are data bind controls in ASP. Component of Web Parts: The web parts consist of different components like: What is the meaning of Immutable? Immutable means once you create a thing, you cannot modify it. What are the various objects in Data set? What are the advantages of using session? The advantages of using session are: What are the disadvantages of using session? The disadvantages of using session are: NET and how to use?
How to create data cache? How to remove a Data Cache? We can remove Data Cache manually. Remove String key ; Upee, says May 13, ASP. Here I have collected some good interview questions with their answers.
Net we have to use a. NET languages are expected to support.
Please Share and Subscribe to support us. Here are just a few samples of those questions and their answers:. Note: In C , Finalize method cannot be override, so you have to use destructor whose internal implementation will override the Finalize method in MSIL. Complete session and application state management. September 14,
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