Linkedin Dot NET Framework Skill Test Updated 2022 Answers
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.
2.
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
3. 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
4. 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.
5.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
6.
_______ pattern works as a bridge between two incompatible interfaces?
Adapter
Bridge
Singleton
Builder
7. 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.
8.
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).
9.
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
10. 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
11.
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.
12.
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.
13.
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.
14.
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.
15. You want to separate object construction from its representation. Which design pattern best fits this objective?
Adapter
Builder
Bridge
Singleton
16.
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.
17. 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
18. 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 }
19. 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.
20. 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
21. What is a tuple?
A data structure that has a specific number and sequence of elements
An
object to store multiple variables of the same type in an array data structure
A
group of classes designed specifically for grouping together objects and
performing tasks on them
An
array whose elements are jagged
22. What does IL stand for?
Intermediate Language
Intelligent
Language
Intelligent
Linq
Interpreted
Language
23. You want to create an instance of several families of classes.
Which design pattern best fits this objective?
Decorator
Singleton
Abstract Factory
Bridge
24. When should you use the .NET Core 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
25. Why would the .NET Framework use Normal-JIT (Just-in-Time)?
to compile complete source code into native code in a single compilation cycle during deployment of the application
to
compile only the methods that are called at runtime and remove them from memory
after execution
to
compile only the methods that are called at runtime and them store them in
cache for one minute
to compile only methods called at runtime – which are compiled the
first time the methods are called and then stored in a cache to be used for
execution when the same methods are called again
26. What is .NET?
.NET is a general-purpose programming language. The language has expanded significantly over time, and now has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.
.NET
is a virtual machine that enables a computer to run programs written in several
languages and compile programs to bytecode.
.NET
is an interpreted, high-level, general-purpose programming language. Its
language constructs an object-oriented approach aimed at helping programmers
write clear, logical code for small and large-scale projects.
.NET is a free, cross-platform, open-source developer platform for
building many different types of applications with multiple languages, editors,
and libraries for web, mobile, desktop, gaming, and IoT.
27. The ASP.NET Core Module is a native IIS module that plugs into the IIS pipeline to either ________.
host an ASP.NET Code app inside of the IIS worker process, called the out-of-process hosting model, or forward web requests to a backend ASP.NET Core app running the Kesrel server, called the in-process hosting model
create
IIS code the server needs in a file with the extension required, or run the IIS
server in a mode compatible for ASP.NET Core
package
up your C# application and C# packages into .NET modules, or specify which of
its packages should be visible to other .NET modules
host an ASP.NET Code app inside of the IIS workes process, called
the in-process hosting model, or forward web requests to a backend ASP.NET Core
app running the Kestrel server, called the out-of-process hosting model
28. In the code below, what is the difference between RenderPartial and RenderAction?
@{
Html.RenderAction("Add");
Html.RenderPartial("Add");
}
RenderPartial
will call an action method of the current controller and render a result
inline. RenderAction will render the specified view inline without calling any
action method.
RenderAction
will call an action method of the current model and render a result inline.
RenderPartial will render the specified view inline without calling any action
method.
RenderAction
will call an action method of the current controller and render a result
inline. RenderPartial will render the specified view inline without calling any
action method.
RenderPartial will call an action method of the current model and
render a result inline. RenderAction will render the specified view inline
without calling any action method.
29. What is the Liskov substitution principle?
Many client-specific interfaces are better than one general-purpose interface.
Objects in a program should be replaceable with instances of their
subtypes without altering the correctness of that program.
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.
30. What method do you use to explicitly kill a user's session?
Session.Timeout()
Session.Abandon()
Session.KillAll()
Session.Remove()
31 Which choice best describes the difference between
globalization and localization?
Globalization involves designing and developing a world-ready app that supports localized interfaces and regional data for users in multiple cultures. Localization is the process of translating an application's resources into versions for each culture that the application will support.
Localization
enables the .NET runtime to provide services to managed code so language
compilers can emit metadata and references in your code. Globalization reverses
this process.
Globalization
enables the .NET runtime to provide services to managed code so language
compilers can emit metadata and references in your code. Localization reverses
this process.
Localization
involves designing and developing a world-ready app that supports localized
interfaces and regional data for users in multiple cultures. Globalization is
the process of translating an application's resources into versions for each
culture that the application will support.
32. What does CIL stand for?
C# Interpreted Language
Common Intermediate Language
Commonly
Interpreted Language
C#
Intermediate Language
33. Which choice best describes the difference between a namespace
and an assembly?
Namespace contains code to form MSIL (Microsoft Intermediate Language). An assembly contains a set of unique names.
Namespace
is the logical naming decided at design time by the developer. Scope for a
particular type is defined at run time using an assembly.
A
namespace has logical units that are physically grouped together. An assembly
does not have any classification.
A
namespace has logical units that are physically grouped together for
assemblies. Assembly classes are available in your program and will be
logically grouped.
34.
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.
35. 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.
36.
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
replaceable with instances of their subtypes without altering the correctness
of that program.
37.
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
38.
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
39. 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
40.
Which choice is NOT a component of .NET Framework?
common language JIT
common
language runtime
side-by-side
execution
.NET
framework class library
41. 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.
42. 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
43. 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.
44. 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.
45. 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
46.
You want to add responsibilities to object dynamically. Which design pattern
best fit this objective?
Facade
Decorator
Bridge
Singleton
47. 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);
48.
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(); }
49. 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.
50. 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
51. 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.
52. 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();
53. You want to include language elements in a program. Which design pattern best fits this objective?
Interpreter
Decorator
Command
Bridge
54. You want to encapsulate a command request as an object. Which design pattern best fits this objective?
Command
Iterator
Facade
Observer
55. 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
56. 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.
57. 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
58.
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
59. 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
60.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;
61. What is the namespace for caching information in .NET?
System.Runtime.Caching;
System.Data.Caching;
All.System.Caching;
System.Compiler.Caching;
62. 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.
63. 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.
64. 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.
65.
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
66. 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.
67. Which of the following is the root of the .NET type hierarchy?
System.Object
System.Type
System.Base
System.Parent
System.Root
68. 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.
69. Which of the following utilities can be used to compile managed assemblies into processor-specific native code?
gacutil
ngen
sn
dumpbin
ildasm
70. 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
71. Which of the following assemblies can be stored in Global Assembly Cache?
Private Assemblies
Friend
Assemblies
Shared
Assemblies
Public
Assemblies
Protected
Assemblies