C# - Test Drive...!!

Frage 1 von 20

10

What must be different between two overloads of a method?

Wähle eine der folgenden:

EITHER the number of parameters OR the return type of each method overload
The names of the method overloads
EITHER the number of parameters OR the type of at least one parameter
EITHER the number of parameters OR the type of at least one parameter OR the return type of each method overload
EITHER the names of the method overloads OR their return types

Erklärung

Frage 2 von 20

10

Which operator would you use to attach a handler to an event?

Wähle eine der folgenden:

=
=+
+=
=>
->

Erklärung

Frage 3 von 20

10

Which of the following is a syntactically correct way to declare and initialize an array of "int"?

Wähle eine der folgenden:

var x = new int[]{1, 2, 3};
int[] x = int[] {1, 2, 3};
int[3] x = new int{1, 2, 3};
var x = new {1, 2, 3};

Erklärung

Frage 4 von 20

20

Consider this implementation of an enumerator.
If this is enumerated, at what point will the message "In finally block!" be written to the console?

Wähle eine der folgenden:

It won't, the yield return bypasses the finally block.
Once, after the first item in the enumeration has been returned.
Three times, once after returning each item in the enumeration.
Once, after the enumeration is complete.

Erklärung

Frage 5 von 20

15

Name an advantage of passing a parameter to a method by reference, compared to passing by value

Wähle eine der folgenden:

Passing by reference protects the data in the caller from inadvertant changes to the parameter value inside the called method.
If the method throws an exception, passing by reference preserves more information in the stack trace.
If the parameter is large, passing by reference saves data copying and can therefore be quicker.
Passing by reference allows the method to safely execute on multiple threads simultaneously without risk of corrupting the data in the parameter.

Erklärung

Frage 6 von 20

10

In the following code, [System.Web.Services.WebMethod] is an example of which C# language feature?

Wähle eine der folgenden:

Functional Property
WebMethod
Attribute
Method-Setting

Erklärung

Frage 7 von 20

15

What is the main problem with the following code?

Wähle eine der folgenden:

The variable "ex" has been declared twice in the same context.
The variable "ex" is not used in the last catch block.
Only one "catch" block can be associated with each "try" block.
The last "catch" block is unreachable.

Erklärung

Frage 8 von 20

20

Write the following LINQ query using method syntax.

Wähle eine der folgenden:

var shortNames = names.Where(name => name.Length < 4)
.OrderBy(name => name);
var shortNames = names.Where(name.Length < 4)
.OrderBy(x);
var shortNames = names.Where(this.Length < 4)
.OrderBy(this);
var shortNames = names.Where(this.Length < 4)
.OrderBy(this)
.Select(this);

Erklärung

Frage 9 von 20

10

What is the full name of the "type" that is represented by keyword "long"?

Wähle eine der folgenden:

System.Int64
System.Long64
System.Int
System.Int32
System.Long

Erklärung

Frage 10 von 20

15

What does the "params" keyword do when used in a method parameter list?

Wähle eine der folgenden:

Guides the compiler in which overload of a method to choose
Allows arguments of any type to be passed to a method
Allows individual arguments to be omitted, with default values supplied, when calling the method
Allows a variable number of arguments to be used when a method is called

Erklärung

Frage 11 von 20

10

What happens when the below code is executed?

public interface ICar
{ public int getspeed(); }

Wähle eine der folgenden:

Succeed
Compile error
Warning

Erklärung

Frage 12 von 20

15

class Car
{
public void DescribeCar()
{
ShowDetails();
}
public virtual void ShowDetails()
{
System.Console.WriteLine("Standard transportation.");
}
}

class ConvertibleCar : Car
{
public new void ShowDetails()
{
System.Console.WriteLine("A roof that opens up.");
}
}

class Minivan : Car
{
public override void ShowDetails()
{
System.Console.WriteLine("Carries seven people.");
}
}

public static void TestCars1()
{

Car car1 = new Car();
car1.DescribeCar();
ConvertibleCar car2 = new ConvertibleCar();
car2.DescribeCar();
Minivan car3 = new Minivan();
car3.DescribeCar();
}

Wähle eine der folgenden:

Standard transportation
Standard transportation
Standard transportation
Standard transportation
A roof that opens up.
Carries seven people.
Standard transportation
Standard transportation
Carries seven people.

Erklärung

Frage 13 von 20

15

On the whole, which types can you inherit from ?

Wähle eine der folgenden:

Any struct or class that is not marked as sealed
Any class that is not marked as sealed
Any class
Any type except for the C# built-in types (int, bool, string, etc.)

Erklärung

Frage 14 von 20

20

Which of these shows the correct way to declare an extension method on "string" called "WordCount()" ?

Wähle eine der folgenden:

public static int WordCount (string str) : this str
{ /* ... */ }
public static extension int WordCount (string, string str)
{ /* ... */ }
public extension int string.WordCount(this string str)
{ /* ... */ }
public static int WordCount (this string str)
{ /* ... */ }

Erklärung

Frage 15 von 20

10

What is the visibility of the "CurrentSpeed" property in the following code ?
public class Automobile
{ double CurrentSpeed {get; set;} }

Wähle eine der folgenden:

Protected internal
Protected
Internal
Public
Private

Erklärung

Frage 16 von 20

10

Consider the following code.
Which of the following is true about the inner "userResponse" declaration?

Wähle eine der folgenden:

It will cause a compiler error because the name conflicts with the first userResponse declaration
It will not allocate a new variable, but will instead overwrite the contents of the outer userResponse variable.
It will cause a compiler error because you cannot declare local variables inside a foreach loop.
It will cause the outer userResponse variable to be hidden within the foreach loop.

Erklärung

Frage 17 von 20

10

What does this code illustrate?

Wähle eine der folgenden:

A generic collection
A generic method
A generic constraint
A generic type

Erklärung

Frage 18 von 20

20

How can you "modify" the "Manager" constructor declaration so that it passes its parameter to the "Employee" constructor

Wähle eine der folgenden:

public Manager(string name) : base(name)
{
base.ctor(name)
/* ... */
}
public Manager(string name) : Employee(name)
{ /* ... */}
public Manager(string name) : base(name)
{ /* ... */}
public Manager(string name)
{
Employee(name)
/* ... */
}

Erklärung

Frage 19 von 20

20

What will be the execution result of the following code ?

Wähle eine der folgenden:

"Hello World!" is displayed in the text block on button click
"Hello World!" is displayed in the text block on button click, after 1 second.
"Hello World!" is never displayed in the text block
"Hello World!" is displayed in the text block on button click, after 10 seconds

Erklärung

Frage 20 von 20

20

What will be the execution result of this code (in the console) ?

Wähle eine der folgenden:

Prints values from 1 to 10
Prints "10" - ten times
Throws a compiler error - as del() is not a method
Prints "1" - ten times
Throws a compiler error - as C# "List" cannot have methods in it

	Erstellt von Prashant Singh R vor fast 6 Jahre

A small test drive - to evaluate a few important concepts from C#

C# - Test Drive...!!

C# - Test Drive...!!

Frage 1 von 20

What must be different between two overloads of a method?

Wähle eine der folgenden:

Erklärung

Frage 2 von 20

Which operator would you use to attach a handler to an event?

Wähle eine der folgenden:

Erklärung

Frage 3 von 20

Which of the following is a syntactically correct way to declare and initialize an array of "int"?

Wähle eine der folgenden:

Erklärung

Frage 4 von 20

Consider this implementation of an enumerator. If this is enumerated, at what point will the message "In finally block!" be written to the console?

Wähle eine der folgenden:

Erklärung

Frage 5 von 20

Name an advantage of passing a parameter to a method by reference, compared to passing by value

Wähle eine der folgenden:

Erklärung

Frage 6 von 20

In the following code, [System.Web.Services.WebMethod] is an example of which C# language feature?

Wähle eine der folgenden:

Erklärung

Frage 7 von 20

What is the main problem with the following code?

Wähle eine der folgenden:

Erklärung

Frage 8 von 20

Write the following LINQ query using method syntax.

Wähle eine der folgenden:

Erklärung

Frage 9 von 20

What is the full name of the "type" that is represented by keyword "long"?

Wähle eine der folgenden:

Erklärung

Frage 10 von 20

What does the "params" keyword do when used in a method parameter list?

Wähle eine der folgenden:

Erklärung

Frage 11 von 20

What happens when the below code is executed? public interface ICar { public int getspeed(); }

Wähle eine der folgenden:

Erklärung

Frage 12 von 20

Wähle eine der folgenden:

Erklärung

Frage 13 von 20

On the whole, which types can you inherit from ?

Wähle eine der folgenden:

Erklärung

Frage 14 von 20

Which of these shows the correct way to declare an extension method on "string" called "WordCount()" ?

Wähle eine der folgenden:

Erklärung

Frage 15 von 20

What is the visibility of the "CurrentSpeed" property in the following code ? public class Automobile { double CurrentSpeed {get; set;} }

Wähle eine der folgenden:

Erklärung

Frage 16 von 20

Consider the following code. Which of the following is true about the inner "userResponse" declaration?

Wähle eine der folgenden:

Erklärung

Frage 17 von 20

What does this code illustrate?

Wähle eine der folgenden:

Erklärung

Frage 18 von 20

How can you "modify" the "Manager" constructor declaration so that it passes its parameter to the "Employee" constructor

Wähle eine der folgenden:

Erklärung

Frage 19 von 20

What will be the execution result of the following code ?

Wähle eine der folgenden:

Erklärung

Frage 20 von 20

What will be the execution result of this code (in the console) ?

Consider this implementation of an enumerator.
If this is enumerated, at what point will the message "In finally block!" be written to the console?

What happens when the below code is executed?

public interface ICar
{ public int getspeed(); }

What is the visibility of the "CurrentSpeed" property in the following code ?
public class Automobile
{ double CurrentSpeed {get; set;} }

Consider the following code.
Which of the following is true about the inner "userResponse" declaration?