File Name: c sharp interview questions and answers .zip
Quick introduction of what we are going to read in this post. We will start with little introduction of what is C? And you will get a link to download PDF of c interview questions.
After that, we will discuss about the scope , the salary of C developers. Then we will conclude this post by discussing some QnA related to C. It is a strongly typed programming language. Ans: Datatype refers to the type of data that can be stored in a variable. It also specifies how memory would be allocated to a variable and the operations that can be performed on that variable.
Q 2: What are Nullable types? Ans: Value types that can accept a normal value or a null value are referred to as Nullable types. Q 3: What is??
Ans: The?? It is used to define a default value for a nullable value type. Q 4: How to check that a nullable variable is having value? Q5: What are the differences between Object and Var? Q6: What is the ref keyword in C? Q7: What is the params keyword in C? Ans: The params keyword enables a method parameter to receive n number of arguments.
These n number of arguments are changed by the compiler into elements in a temporary array. Q8: What do you mean by operators in C? Ans: An operator is a symbol that tells the compiler what operations can be performed o an operand.
Q9: What are the different types of operators in C? Ans: There are seven operators in C. Ans: A ternary operator works on a conditional expression that returns a Boolean value. It is a shorthand form of if-else. Q What is the static keyword mean in C? Ans: The static keyword is used to specify a static number, which means that static members are common to all the objects and they do not tie to a specific object. Q What do you mean by Typecasting in C?
Ans: Typecasting is a mechanism to covert one type of value to another value. It is possible only when both the data types are compatible with each other. Q What are the different types of casting in c? Ans: 1. Explicit conversion: Conversion of larger data type to smaller data type. It might result in loss of data so it is also an unsafe type of casting. Implicit conversion: Conversion of a smaller data type to a larger data type and conversion of derived classes to base class.
Q What is an Out keyword in C? It is generally used when a method returns multiple values. Q Can you use out and ref for overloading as the different signature of method? Ans: No, we cannot do that.
Even if both ref and out are treated differently at runtime they treated the same at compile time. Hence it cannot be overloaded with the same type of arguments. Q What are the named arguments? Q What you man by value type and reference type? Q What is a safe and unsafe code in C? Unsafe code : The code which does not run under the management of CLR is called unsafe code. Q What is boxing and unboxing in C?
Ans: Boxing: Implicit conversion of a value type int, char to a reference type is known as boxing. Unboxing : Explicit conversion of the same reference type which is created back in boxing process back to value type is known as unboxing.
Q What is upcasting and Downcasting? Ans: Implicit conversion of derived classes to a base class is called Upcasting and explicit conversion of the base class to a derived class is called Downcasting.
Q What are the different types of decision-making statements in C? Ans: Decision-making statements help you to make a decision based on certain conditions. Different types of decision-making statements are: if statements, if-else statements, if-else-if statements, and switch statements.
Ans: Switch statements are father than if-else-if statements because in if-else if statements each and every condition has to check but in case of the switch statement compiler does not need to check earlier cases. Ans: The goto statement transfers program control to a labeled statement.
The statement must exist in the scope of the goto statement. Q What is the return statement in C? Ans: The return statement terminates the execution of the method in which it appears and returns control to the calling method.
Q What is the jump statement in C? Ans: The jump statements transfer the program control from one point in the program to another point of the program. Q What is the throw statement mean? Ans: This statement throws an exception which indicates that an error has occurred during the program execution. Q What do you mean by an array and what are the different types of an array in C? Ans: An array is a collection of the same type of elements that are accessible by a numerical index.
Different types of array are- one dimensional, two dimensional, and jagged arrays. Q What do you mean by multi-dimensional array? Ans: A jagged array is an array whose elements are array itself of different dimensions and sizes. Q What do you mean by an object in C? Ans: An object is a representative of the class and is responsible for memory allocation of its member functions. An object is a real-world entity having attributes and behaviors.
Ans: A constructor is a special type of function which has the same name as its class. The constructor is invoked whenever an object of a class is created. Q Why static constructor has no parameter? Q Why you can have only one static constructor? Ans: To define multiple constructors for a class, you need to overload the constructors.
It means you need to define parameterized constructors that accept parameters from outside but a static constructor is called by the CLR and CLR cannot pass parameters to the parameterized constructor. It is used to release unmanaged resources allocated by the object.
It cannot be called explicitly. Ans: The using statement obtains the specified resources, uses it and then automatically calls the dispose method to clean up the specified resources when the execution of the statement is completed. Q Can destructors have access modifiers? Q What do you mean by an enum and when to use it?
Ans: An enum is a value type that stores a list of named constants which are known as enumerators. Q What is the difference between class and structure? Q What do you mean by static members? Ans: Static class members are declared using the static keyword. These can be only called with the class name. Q What is the base class in. NET framework from which all the classes are derived? Ans: A static class is a special class that is loaded into memory automatically by the CLR at the time of code execution.
Ans: A static class is useful when you want to provide common utilities like: configuration settings, driver functions, etc. Ans: Sealed classes are special types of class that is being restricted to be inherited.
It is used to prevent inheritance. Can multiple catch blocks be executed? Once the proper catch code executed, the control is transferred to the final block, and then the code that follows the final block gets executed. Q What are value types and reference types? Reference type stores the address of the object where the value is being stored. It is a pointer to another memory location. Ans: An object pool is a container having objects ready to be used.
It tracks the object that is currently in use, the total number of objects in the pool.
C is fully object oriented programming language to develop dynamic web applications in. C is an object oriented and user friendly. It gives security and reusability. We can develop multiple applications. Also C is a flexible language which can be used as a basic tool to develop ASP. C is pure object oriented language that supports many type of developing appliction such as selverlight, wcf, mvc, console, website etc; also suporting for indiviusal software.
C is a general purpose programming language which encompasses various disciplines like object-oriented programming, static typing, component-oriented programming, strong typing, etc. C is widely used in the ASP. NET framework for creating websites, web applications and games. There are vast opportunities for C programming all over the world. If you are thinking to build a career in C programming, you need to crack an interview in which you will be asked several C basic interview questions and answers as listed below. This is a curated list of C interview questions and answers, which are likely to be asked during the interview. Candidates are likely to be asked basic C interview questions to advance level C.
Our Most Popular Learning Paths. C Interview Questions and Answers Book. Reviews Book Preview. C is an object-oriented programming language developed by Microsoft, which runs under. NET platform. NET Core.
Debuting back in , C has succeeded in becoming one of the leading programming languages. As a multi-paradigm programming language, C also has some features of functional programming that takes its usefulness and versatility to a step further. In the following section, we have enlisted the most important C interview questions.
C is a programming language that has been rapidly growing and is being intensively used. It can be used for a number of operating systems such as Windows, iOS, Android , etc. C is a simple, modern and object-oriented language. Some of the particular syntax used in C are semicolons, curly brackets, variables two variables are assigned with the help of an equal sign and square brackets. It has a number of advantages and is very user-friendly which makes it one of the most used programming languages in the IT firms.
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