Linkedin Dot NET Framework Skill Test Questions and Answers
Q1. What is the difference between a SDK (software development kit) and runtime in .NET Core?
The SDK is the "virtual machine" that hosts and runs the application and abstracts all the interaction with the operating system; the runtime usually includes documentation and other help files.
The runtime compiles code along with the CLR; the SDK usually includes documentation and other help files.
The runtime is the virtual machine that hosts and runs the application and abstracts all the interaction with the operating system; the SDK usually includes documentation and other help files
The SDK compiles code along with the CLR; the runtime usually includes documentation and other help files.
Q2. What makes a strong-named assembly?
a signed assembly
an assembly with the version specified
an assembly with cultural information
an assembly with the name marked as important
Q3. Which is a set of features that extends the query capabilities of the .NET language syntax by adding sets of new standard query operators that allow data manipulation, regardless of the data source?
XML
C#
LINQ
XAML
Q4. What is an abstract class in .NET?
An abstract class provides a partial implementation for functionality and some abstract or virtual members that must be implemented by the inheriting entities. It can declare fields too.
An abstract class declares a contract or behavior that implementing classes require. It may declare only properties, methods, and events with no access modifiers. All the declared members must be implemented
An abstract class allows developers to create new classes that reuse, extend, and modify the behavior defined in other classes.
An abstract class is responsible for keeping track of what is actually executing and where each executing thread is.
Q5.When should a developer use the .NET Standard class library project type?
when you want to increase the .NET API surface area your library can access, and allow only .NET Core apps to be compatible with your library
when you want to increase the number of apps that are compatible with your library, and decrease the .NET API surface area your library can access
when you want to decrease speed but have more features
when you want to increase compilation speed and have fewer features
Q6. _______ pattern works as a bridge between two incompatible interfaces?
Adapter
Bridge
Singleton
Builder
Q7. What is CoreCLR?
CoreCLR is a component that allows the highest degree of control when coding; you can Abort(), Suspend(), or Resume().
CoreCLR is the .NET execution engine that runs the source code. Special programs called compilers must rewrite it into MSIL.
CoreCLR is the .NET execution engine the runs the source code. Special programs called compilers must rewrite it into IL.
CoreCLR is the .NET execution engine in .NET Core that performs functions like garbage collection and compilation to machine code.
Q8. What is the difference between a stack and queue?
Queues process value types by a top-down hierarchy - first in, first out (FIFO). Stacks follow this principle and insert items from the lower end while deleting ones from the top - last in, first-out (LIFO).
Queues process value types by a top-down hierarchy-last in, first-out (LIFO). Stacks follow this principle and insert items from the lower end while deleting ones from the top-first in, first-out (FIFO).
Stacks process value types by a top-down hierarchy - last in, first-out (LIFO). Queues follow this principle and insert items from the lower end while deleting ones from the top - first in, first-out (FIFO)
Stacks process value types by a top-down hierarchy-first in, first out (FIFO). Queues follow this principle and insert items from the lower end while deleting ones from the top-last in, first-out (LIFO).
Q9. Which group contains all official types of JIT compilations?
Pre-JIT, Quick-JIT, Coll-JIT
Pre-JIT, Econo-JIT, Normal-JIT
Before-JIT, Quick-JIT, Cool-JIT
Pre-JIT, Quick-JIT, Normal-JIT
Q10. What is Kestrel?
an iOS web server initially that was later designed to work with .NET Core
a cross-platform, open-source web server that starts up web APIs
a cross-platform web server ASP.NET Core that is included by default in ASP.NET Core project templates** <= Correct
a free and open-source cross-platform web server software that can communicate with IIS
Q11. Which is NOT true about lambda statements?
A statement lambda cannot return a value. <= Correct
If a statement lambda has a return value, it has to use a return statement.
A statement lambda requires using curly braces.
A statement lambda can have more than one statement.
Q12. Which is NOT true about a read-only variable?
At runtime, its value is evaluated.
It can be either static or an instance member.
It can be initialized at declaration only.
It can be initialized in either the constructor or the declaration.
Q13. What is the difference between System.String and string?
string is used for fied-size strings in C#, while System.String is used for all the strings.
There is no such class as System.String.
There is none—string is an alias for System. String.
System.String is a VB.NET data type, while string is a C# type.
Q14. When break is used inside two nested for loops, does control come out of the inner for loop or the outer for loop?
It breaks from only the outer loop.
It breaks from all loops.
It breaks from only the inner loop.
It breaks from the outer loop after the second iteration.
Q15. You want to separate object construction from its representation. Which design pattern best fits this objective?
Adapter
Builder
Bridge
Singleton
Q16. What is the dependency inversion principle?
Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.
Entities must depend on abstractions, not on concrete implementations.
A class should have only a single responsibility—that is, only changes to one part of the software's specification should be able to affect the specification of the class.
Software entities should be open for extension but closed for modification.
Q17. What is a namespace?
a group of generic collections—in a logical hierarchy by function—that enable you to access the core functionality you need in your applications
a group of classes, structures, interfaces, enumerations, and delegates—organized in a logical hierarchy by function that enable you to access the core functionality you need in your applications
a group of methods—in a logical hierarchy by class—that enable you to access the core functionality you need in .NET
a group of assemblies—in a logical hierarchy by function—that enable you to access the core functionality you need in your applications
Q18. Which of the following selects an anonymous type?
select new { a.Country, a.Region }
select a
select a.Country, a.Region
select { a.Country, a.Region }
Q19. Which is NOT true about a constant variable?
At compile time, the value is evaluated.
Only at declaration can it be initialized.
At runtime, its value is evaluated.
It cannot be static.
Q20. What is the purpose of CLR?
CLR performs various operations such as security checks, spell checks, assembly loading, and thread management. It provides a secure execution environment for the internet.
CLR sets the rules developers must use for the components that are interlanguage compatible. CLR is reusable across all the .NET-compliant languages.
CLR is a compiler that converts Intermediate Language to a native code.
CLR performs various operations such as memory management, security checks, assembly loading, and thread management. It also provides a secure execution environment for applications
Q21. What is CIL?
CIL is an object-oriented programming language that is a partially compiled code that .NET developers will then compile to native machine code.
CIL is used to convert a value type to an object type.
CIL is a compiled code library that Microsoft developed as an open specification. Developers use it for security, versioning, and deployment purposes.
Formerly known as MSIL, CIL is a programming language that NET developers use. It represents the lowest possible level for a language that humans can still read.
Q22. What is a delegate?
A delegate is an object or collection initializer that adds flexibility, readability and maintainability in C#.
A delegate in .NET is similar to a function pointer in C or C++. Using a delegate allows the programmer to encapsulate a reference to a method inside a delegate object.
A delegate is a collection initializer that adds flexibility, readability and maintainability in .NET.
A delegate is an extension method. Using a delegate allows the programmer to add flexibility, readability and maintainability in .NET.
Q23. What is the single responsibility principle?
A class should have only a single responsibility - that is, only changes to one part of the software's specification should be able to affect the specification of the class.
Software entities should be open for extension, but closed for modification.
Entities must depend on abstractions, not on concrete implementations.
Objects in a program should be repleaceble with instances of their subtypes without altering the correctness of that programm.
Q24. Where should you store connection string information?
in any file within the namespace of the program
in the view
in the database
in configuration files
Q25. Why use design patterns?
design patterns make the code more efficient with memory usage
design patterns help you solve issues related to sofware development using a proven solution, and make communication between developers more efficient
design patterns minimize the number of code lines when creating complex applications
design patterns tend to be more secure and prevent code from being hacked
Q26. What is a task?
a single operation that does not return a value and that usually executes asynchronously
the basic unit to which an operating system allocates processor time
a program that is running on your compiler
a series of related methods that together turn inputs into outputs
Q27. Which choice is NOT a component of .NET Framework?
common language JIT
common language runtime
side-by-side execution
.NET framework class library
Q28. Which statement about the this keyword is not true?
The this keyword lets a constructor call a different constructor in the same class.
A constructor can use one this statement at most.
If a constructor uses a this statement, its code is executed after the invoked constructor is executed.
A constructor can use a base statement and a this statement if the base statement comes first.
Q29. When should you use the .NET Core class library project type?
when you want to increase compilation speed and have fewer features
when you want to increase the .NET API surface area your library can access, and allow only .NET Core apps to be compatible with your library
when you want to increase the number of apps that are compatible with your library, and decrease the .NET API surface area your library can access
when you want to decrease speed but have more features
Q30. Why would you use ahead-of-time (AOT) compilation?
You have little memory and disk space
You can deliver a faster startup time, especially in big applications where much code executes on startup.
You have a slow processor.
The JIT compiler does not have to do a lot of disk I/O actions, which are quite expensive.
Q31. Which statement describes a Dispose method?
It defines an execution environment for program code and manages the CLR
It belongs to the IDisposable interface and is used to free resources, such as network connection and files.
It is partially method-compiled code library for use in deployment, versioning, and security.
It is used for encapsulation of collections tied to functions of a class and object.
Q32. What is a thread?
The basic unit to which an operating system allocate processor time
A series of related tasks or methods that together turn inputs into outputs
A single operation that does not return a value and that usually executes asynchronously
A program that is running on your computer
Q33. You want to add responsibilities to object dynamically. Which design pattern best fit this objective?
Facade
Decorator
Bridge
Singleton
Q34. Which choice creates an 8-tuple contaiCreate (2ning prime numbers that are less than 20?
var primes = Tuple.Create(2, 3, 5, 7, 11, 13, 17, 21);
var primes = Tuple.Make(2, 3, 5, 7, 11, 13, 17, 20);
var primes = Tuple.Create(2, 3, 5, 7, 11, 13, 17, 19);
var primes = Tuple.Make(2, 3, 5, 7, 11, 13, 17, 19);
Q35. How can you recieve form data without a model binder in a controller action?
public IFormResult ReceivedDataByRequest() { string theName = Request.Forms["theName"]; return View(); }
public IActionResult ReceivedDataByRequest() { string theName = Request.Form["theName"]; return View(); }
public IActionResult ReceivedDataByRequest() { string theName = Request.Forms["theName"]; return View(); }
public IFormResult ReceivedDataByRequest() { string theName = Request.Form["theName"]; return View(); }
Q36.What happens when you concatenate two strings?
You cannot concatenate strings in .NET.
The second string object is modified so it contains the concatenated strings.
A third string object is created containing the concatenated strings.
The first string object is modified so it contains the concatenated strings.
Q37. When would you use asynchronous actions?
to release the quest thread of a I/O operation
to capture the request thread of a I/O operation
to avoid blocking the request thread while waits for an I/O operation
to block the request thread if it waits for an I/O operation
Q38. When you define an abstract method, how do you use it in a derived class?
Abstract methods cannot be used in derived classes.
In your derived class, overload the method.
In your derived class, override the method.
In your derived class, declare the method as virtual.
Q39. Which code do you use if you want to trigger a garbage collection in .NET?
System.GC.Collect();
Garbage.CleanUp();
System.GC.Clear();
Garbage.Collect();
Q40.You want to include language elements in a program. Which design pattern best fits this objective?
Interpreter
Decorator
Command
Bridge
Q41. You want to encapsulate a command request as an object. Which design pattern best fits this objective?
Command
Iterator
Facade
Observer
Q42. Why would Pre-JIT be used by the .NET Framework?
to compile only the methods that are called at runtime and store those methods in cache after execution
to compile only the methods that are called at runtime and then store them in cache for one minute
to compile only the methods that are called at runtime and remove them from memory after execution
to compile complete source code into native code in a single compilation cycle during deployment of the application
Q43. What do code contracts do?
Code contracts are data structures that can operate on demand per requirements.
Code contracts provide a way to specify preconditions, postconditions, and object invariants in your code.
Code contracts contain definitions for a group of related functionalities that a class or a struct can implement.
Code contracts contain data structures for a group of related functionalities that a class or a struct can implement.
Q44. You must connect an app to an online identity provider using OAuth. For authentication, the app uses the WebAuthenticationBroker object. You need to make sure the app registers with the provider. Which actions do you take?
Construct an HTTP request URI and an HTTPS request URI.
Invoke the GetCurrentApplicationCallbackUri method and construct an HTTPS request URI.
Invoke the AuthenticateAsync and GetCurrentApplicationCallbackUri methods.
Invoke the AuthenticateAsync method and construct an HTTPS request URI.
connect to the online identity provider and get an access token
Q45. You want to create a class of which only a single instance can exist. Which design pattern best fits this objective?
Adapter
Bridge
Singleton
Decorator
Q46. What is the Common Type System (CTS)?
the component of CLR in which .NET Framework provides support for several languages since it contains a type system that is common with all the languages
the component of CLR that allows you to map the content of a file to the logical address of an application
the component of CLR that enables you to run multiple versions of an application or component and CLR on the same computer at the same time
the component of CLI in which .NET Framework provides support for several languages since it contains a type system that is common with all the languages
Q47.Assuming y is a value type, which is an example of boxing?
object thisObject = y;
y = (int)thisObject;
int y = 3;
y = (int)thisObject=;3;
Q48.What is the namespace for caching information in .NET?
System.Runtime.Caching;
System.Data.Caching;
All.System.Caching;
System.Compiler.Caching;
Q49.What is an interface in .NET?
An interface provides a partial implementation for functionality and some abstract or virtual members that must be implemented by the inheriting entities. It can declare fields too.
An interface declares a contract or behavior that implementing classes require. It may declare only properties, methods, and events with no access modifiers. All the declared members must be implemented.
An interface is responsible for keeping track of what is actually executing and where each executing thread is.
An interface allows developers to create new classes that reuse, extend, and modify the behavior defined in other classes.
Q50. What does CAS stand for and what does it do?
CAS stands for Code Application Secrets and it enables users to restrict, on a very granular level, what hidden code can do according to a level of trust for an application.
CAS stands for Code Access Security and it enables users to restrict, on a very granular level, what managed code can do according to a level of trust.
CAS stands for Code Access Secrets and it enables users to restrict, on a very granular level, what hidden code can do according to a level of trust.
CAS stands for Cognitive Access Security and it enables users to restrict security logic manipulation.
Q52. Which of the following .NET components can be used to remove unused references from the managed heap?
Common Language Infrastructure
CLR
Garbage Collector
Class Loader
CTS
Q53. Which of the following statements correctly define .NET Framework?
It is an environment for developing, building, deploying and executing Desktop Applications, Web Applications and Web Services.
It is an environment for developing, building, deploying and executing only Web Applications.
It is an environment for developing, building, deploying and executing Distributed Applications.
It is an environment for developing, building, deploying and executing Web Services.
It is an environment for development and execution of Windows applications.
Q54. Which of the following is the root of the .NET type hierarchy?
System.Object
System.Type
System.Base
System.Parent
System.Root
Q55. Which of the following statements is correct about Managed Code?
Managed code is the code that is compiled by the JIT compilers.
Managed code is the code where resources are Garbage Collected.
Managed code is the code that runs on top of Windows.
Managed code is the code that is written to target the services of the CLR.
Managed code is the code that can run on top of Linux.
Q56. Which of the following utilities can be used to compile managed assemblies into processor-specific native code?
gacutil
ngen
sn
dumpbin
ildasm
Q57. Which of the following components of the .NET framework provide an extensible set of classes that can be used by any .NET compliant programming language?
.NET class libraries
Common Language Runtime
Common Language Infrastructure
Component Object Model
Common Type System
Q58. Which of the following assemblies can be stored in Global Assembly Cache?
Private Assemblies
Friend Assemblies
Shared Assemblies
Public Assemblies
Protected Assemblies
Q59. Which of the following statements is correct about the .NET Framework?
.NET Framework uses DCOM for achieving language interoperability.
.NET Framework is built on the DCOM technology.
.NET Framework uses DCOM for making transition between managed and unmanaged code.
.NET Framework uses DCOM for creating unmanaged applications.
.NET Framework uses COM+ services while creating Distributed Applications.