DRAG DROP
You have a method named GetCustomerIDs that returns a list of integers. Each entry in the list represents a
customer ID that is retrieved from a list named Customers. The Customers list contains 1,000 rows.
Another developer creates a method named ValidateCustomer that accepts an integer parameter and returns a
Boolean value. ValidateCustomer returns true if the integer provided references a valid customer.
ValidateCustomer can take up to one second to run.
You need to create a method that returns a list of valid customer IDs. The code must execute in the shortest
amount of time.
What should you do? (Develop the solution by selecting and ordering the required code snippets. You may not
need all of the code snippets.)
Select and Place:

HOTSPOT
You have the following code:

For each of the following statements, select Yes if the statement is true. Otherwise, select No.
Hot Area:

HOTSPOT
You have the following code:

To answer, complete each statement according to the information presented in the code.
Hot Area:

HOTSPOT
You are reviewing the following code:

For each of the following statements, select Yes if the statement is true. Otherwise, select No.
Hot Area:

DRAG DROP
You have the following class:

You need to implement IEquatable. The Equals method must return true if both ID and Name are set to the
identical values. Otherwise, the method must return false. Equals must not throw an exception.
What should you do? (Develop the solution by selecting and ordering the required code snippets. You may not
need all of the code snippets.)
Select and Place:

You are developing a C# application that includes a class named Product. The following code segment defines
the Product class:

You implement System.ComponentModel.DataAnnotations.IValidateableObject interface to provide a way to
validate the Product object.
The Product object has the following requirements:
The Id property must have a value greater than zero.
The Name property must have a value other than empty or null.
You need to validate the Product object. Which code segment should you use?

You are developing an application that will transmit large amounts of data between a client computer and a
server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm
should you use?

You are developing an application. The application calls a method that returns an array of integers named
customerIds. You define an integer variable named customerIdToRemove and assign a value to it. You declare
an array named filteredCustomerIds.
You have the following requirements.
Remove duplicate integers from the customerIds array.
Sort the array in order from the highest value to the lowest value.
Remove the integer value stored in the customerIdToRemove variable from the customerIds array.
You need to create a LINQ query to meet the requirements.
Which code segment should you use?

DRAG DROP
You are developing an application by using C#. The application will process several objects per second.
You need to create a performance counter to analyze the object processing.
Which three actions should you perform in sequence? (To answer, move the appropriate actions from the list of
actions to the answer area and arrange them in the correct order.)
Select and Place:

You are developing an application that will transmit large amounts of data between a client computer and a
server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm
should you use?