C SHARP INTERVIEW QUESTIONS PDF
Best 38 C# Interview Questions And Answers Pdf A Deadlock is a situation where a process is not able to complete its execution because two. Our advanced C#.Net interview questions are very useful for experienced Csharp professionals. We have c#.net interview questions answers in pdf format, one. Comprehensive, community-driven list of essential C# interview questions. Whether you're a candidate or interviewer, these interview questions will help.
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Following interview questions are for freshers and experienced users. 1. What is C#?. C# is an object oriented, type safe and managed. C# Tutorials FAQ - Frequently Asked Interview Questions and Answers for Freshers or Experienced Pdf. This interview section questions contains a brief. + Advanced C# Interview Questions and Answers, Question1: What is attribute in C#? Question2: Why attributes are used? Question3: What are the types of.
Have you prepared to attend the job interview? Are you confused in job preparation? Then no problem we have the right solution you in in our site page. Underneath are the commonly asked Advanced C job interview questions and answers which can make you feel relaxed to face the interviews:. Question 1.
Static declared variables or methods are globally accessible without creating an instance of the class. Static member are by default not globally accessible it depends upon the type of access modified used. The compiler stores the address of the method as the entry point and uses this information to begin execution before any objects are created.
And Void is a type modifier that states that the method or variable does not return any value. What is an object? An object is an instance of a class through which we access the methods of that class. A class that creates an object in memory will contain the information about the methods, variables and behavior of that class.
Define Constructors? A constructor is a member function in a class that has the same name as its class.
The constructor is automatically invoked whenever an object class is created. It constructs the values of data members while initializing the class. What is Jagged Arrays? The array which has elements of type array is called jagged array. The elements can be of different dimensions and sizes. We can also call jagged array as Array of arrays.
An argument passed as ref must be initialized before passing to the method whereas out parameter needs not to be initialized before passing to a method.
What is the use of using statement in C? The using block is used to obtain a resource and use it and then automatically dispose of when the execution of block completed. What is serialization? When we want to transport an object through network then we have to convert the object into a stream of bytes. The process of converting an object into a stream of bytes is called Serialization. For an object to be serializable, it should implement ISerialize Interface.
De-serialization is the reverse process of creating an object from a stream of bytes. Can "this" be used within a static method? What is difference between constants and read-only? Constant variables are declared and initialized at compile time. The value can't be changed afterwards.
Read only is used only when we want to assign the value at run time. What is an interface class?
Top 50 C# Interview Questions and Answers
Interface is an abstract class which has only public abstract methods and the methods only have the declaration and not the definition. These abstract methods must be implemented in the inherited classes. What are value types and reference types? Value types are stored in the Stack whereas reference types stored on heap. Value types: What are Custom Control and User Control?
Custom Controls are controls generated as compiled code Dlls , those are easier to use and can be added to toolbox. Developers can drag and drop controls to their web forms. Attributes can be set at design time.
We can easily add custom controls to Multiple Applications If Shared Dlls , If they are private then we can copy to dll to bin directory of web application and then add reference and can use them. User Controls are very much similar to ASP include files, and are easy to create.
User controls can't be placed in the toolbox and dragged - dropped from it. They have their design and code behind. The file extension for user controls is ascx. What are sealed classes in C?
We create sealed classes when we want to restrict the class to be inherited. Sealed modifier used to prevent derivation from a class. If we forcefully specify a sealed class as base class then a compile-time error occurs.
What is method overloading? Method overloading is creating multiple methods with the same name with unique signatures in the same class. When we compile, the compiler uses overload resolution to determine the specific method to be invoke. What is the difference between Array and Arraylist? In an array, we can have items of the same type only. The size of the array is fixed. An arraylist is similar to an array but it doesn't have a fixed size.
C#.NET interview questions and answers - csharp FAQ PDF
Can a private virtual method be overridden? No, because they are not accessible outside the class. Describe the accessibility modifier "protected internal". What are the differences between System. String and System. StringBuilder classes? C became the most vital subjects or programming language for freshers.
Their are lots of opportunity in C. NET platform and designed for improving productivity in the development of Web applications. Namespace is a logical grouping of class. Generic; using System. A base class is a class that is used to create, or derive other classes. Classes derived from a base class are called child classes, subclasses or derived classes. A base class does not inherit from any other class and is considered parent of a derived class.
C Interview Questions 2. TCS Technical interview Questions. Data Types in C. Functions in C. A constructor is a class member executed when an instance of the class is created. The constructor has the same name as the class, and it can be overloaded via different signatures. Constructors are used for initialization chores. Immutable means string values cannot be changed once they have been created. Any modification to a string value results in a completely new string instance, thus an inefficient use of memory and extraneous garbage collection.
The mutable System. StringBuilder class should be used when string values will change. Object pool is a container of ready to use objects.
It reduces the overhead of creating new object.
The section contains questions on if, while, do while, for, switch, continue and goto looping statements? Garbage Collection is a process of releasing memory automatically occupied by objects which are no longer accessible. Describe the basic construction of a C program. A typical C program consists of a namespace declaration, a class, methods, attributes, a main method, statements, expressions, and comments.
ReadKey ;. The section contains questions and answers on polymorphism, structures, enumeration, inheritance, method overloading and method overriding, abstract class and interface implementation. The dispose method is explicitly called by user to free unmanaged resources such as files, database connections etc whereas finalize method is implicitly called by garbage collector to free unmanaged resources like files, database connections etc.
The dispose method belongs to IDisposable interface whereas finalize method belongs the Object class. A delegate in C is an object that holds the reference to a method.
Advanced C# Interview Questions & Answers
What is the difference between dynamic type variables and object type variables in C? The difference between dynamic and object type variables has to do with when the type checking takes place during the application lifecycle.
Dynamic type variables handle type checking at run time, while object type variables handle type checking during compile time. Nullable types are data types that, in addition to their normal values, also contain a defined data type for null. Nullable types exist to help integrate C , which generally works with value types, and databases, which often use null values. You can declare a nullable type in C using the following syntax:.
It is considered as managed because of the. Net framework which internally uses the garbage collector to clear up the unused memory. Unmanaged code is any code that is executed by application runtime of any other framework apart from.
The application runtime will take care of memory, security and other performance operations. The section contains questions and answers on integer, float, decimal and character data types, variable initialization , their scope and lifetime, arithmetic, relational, logical, bitwise and conditional operators. The section contains questions and answers on basics of pointers and their operation, accessor controls and string formatting. It will immensely help anyone trying to crack a C code or an interview.
The section contains questions and answers on collection framework, mathematical classes, rounding functions, iterators and multithreaded programming. One solution would be to create a variable for each item in the set but again this leads to a different problem.
So in this situation Arrays provide mechanisms that solves problem posed by these questions. An array is a collection of related items, either value or reference type. In C arrays are immutable such that the number of dimensions and size of the array are fixed. An array contains zero or more items called elements.
An array is an unordered sequence of elements. All the elements in an array are of the same type unlike fields in a class that can be of different types. The elements of an array accessed using an integer index that always starts from zero. C supports single-dimensional vectors , multidimensional and jagged arrays. Elements are identified by indexes relative to the beginning of the arrays.
An index is also commonly called indices or subscripts and are placed inside the indexing operator . Access to array elements is by their index value that ranges from 0 to length The length cannot be changed once created. Elements are initialized to default values. Arrays are reference types and are instances of System. Their number of dimensions or ranks can be determined by the Rank property.
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