Question 41

What type of methods can be called without instantiating an object first?

static

dynamic

primary

No answer text provided.

Question 42

Assume an extension method is defined as:

static class Util

{ public static int Negate(this int i)

{

return -i;

}

}

Which of the following is correct?

int x = 591; Console.WriteLine($"x.Negate {x.Negate()}");

int x = 591; Console.WriteLine($"x.Negate {Util.Negate(x)}");

both A and B

None of the above

Question 43

To define an extension method for a type:

The extension method can be an instance method

The first parameter must be of the type being extended

The first parameter must be proceeded by this keyword

Both A, B and C

Both B and C

Both A and C

Question 44

var addresses = new[] {

new { CompanyName = "Alpine Ski House", City = "Berne", Country = "Switzerland"},

new { CompanyName = "Coho Winery", City = "San Francisco", Country = "United States"},

new { CompanyName = "Wingtip Toys", City = "London", Country = "United Kingdom"},

new { CompanyName = "Wide World Importers", City = "Tetbury", Country = "United Kingdom"}

};

var usCompanies =

addresses.Where(addr => String.Equals(addr.Country, "United States"))

.Select(usComp => usComp.CompanyName)

What type is variable usCompanies?

int

string

IEnumerable

anonymous type

Question 45

In the variable declaration Func processor, the variable processor represents which of the following?

Methods that take no parameters and return an Order object.

Methods that take an Order object as a parameter and return void.

Methods that take an Order object as a parameter and return an Order object.

Methods provided by the Action class that take no parameters and return void.

None of the choices are correct

Question 46

Assume Horse class is defined as:

class Horse : ILandBound, IJourney

{

int ILandBound.NumberOfLegs() { return 4; }

int IJourney.NumberOfLegs() { return 3; }

}

Which of the following is correct if:

Horse horse = new Horse(); int legs = horse.NumberOfLegs();

legs variable has a value of 4

legs variable has a value of 3

Code will not compile

None of the choices are correct

Question 47

Suppose the variable result is declared by the statement Func result. Which of the following correctly initializes result to an expression lambda?

result = (float x) => x * x;

result = (x) => return x * x;

result = x => x * x;

Both a and c are correct.

Question 48

Which method can you use to find the minimum value in a sequence?

(from i in myArray select i).Min()

from Min(i) in myArray select i

from i in myArray select Min(i)

from i in Min(myArray) select i

Question 49

Which object does the variable mySet inherit from?

Int[] mySet = new int[5];

System.Collection

System.Collection.List

System.Array

None, this is a value type.

Question 50

If Employee inherits from Person and Manager inherits from Employee, which of the following statements is valid?

Person alice = new Employee();

Employee bob = new Person();

Manager cindy = new Employee();

Manager dan = (Manager)(new Employee());