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Q31. - (Topic 2) 

You are developing an application for a bank. The application includes a method named ProcessLoan that processes loan applications. The ProcessLoan() method uses a method named CalculateInterest. The application includes the following code: 

You need to declare a delegate to support the ProcessLoan() method. Which code segment should you use? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: C 

Q32. - (Topic 2) 

You are modifying an existing application that manages employee payroll. The application includes a class named PayrollProcessor. The PayrollProcessor class connects to a payroll database and processes batches of paychecks once a week. 

You need to ensure that the PayrollProcessor class supports iteration and releases database connections after the batch processing completes. 

Which two interfaces should you implement? (Each correct answer presents part of the complete solution. Choose two.) 

A. IEquatable 

B. IEnumerable 

C. IDisposable 

D. IComparable 

Answer: B,C 

Explanation: IEnumerable IDisposable Interface Exposes an enumerator, which supports a simple iteration over a non-generic collection. 

Defines a method to release allocated resources. 

The primary use of this interface is to release unmanaged resources. 

Q33. - (Topic 2) 

You need to write a method that retrieves data from a Microsoft Access 2013 database. 

The method must meet the following requirements: 

Be read-only. 

Be able to use the data before the entire data set is retrieved. 

Minimize the amount of system overhead and the amount of memory usage. 

Which type of object should you use in the method? 

A. SqlDataAdapter 

B. DataContext 

C. DbDataAdapter 

D. OleDbDataReader 

Answer: D 

Explanation: OleDbDataReader Class 

Provides a way of reading a forward-only stream of data rows from a data source. 

Example: 

OleDbConnection cn = new OleDbConnection(); 

OleDbCommand cmd = new OleDbCommand(); 

DataTable schemaTable; 

OleDbDataReader myReader; 

//Open a connection to the SQL Server Northwind database. 

cn.ConnectionString = "Provider=SQLOLEDB;Data Source=server;User ID=login; 

Password=password;Initial Catalog=Northwind"; 

Q34. DRAG DROP - (Topic 2) 

You are adding a method to an existing application. The method uses an integer named statusCode as an input parameter and returns the status code as a string. 

The method must meet the following requirements: 

Return "Error" if the statusCode is 0. 

Return "Success" if the statusCode is 1. 

Return "Unauthorized" if the statusCode is any value other than 0 or l. 

You need to implement the method to meet the requirements. 

How should you complete the relevant code? (To answer, drag the appropriate statements to the correct locations in the answer area. Each statement may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.) 

Answer: 

Q35. - (Topic 1) 

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? 

A. DES 

B. HMACSHA512 

C. RNGCryptoServiceProvider 

D. ECDsa 

Answer: B 

Q36. - (Topic 2) 

You are developing an application that produces an executable named MyApp.exe and an assembly named MyApp.dll. 

The application will be sold to several customers. 

You need to ensure that enough debugging information is available for MyApp.exe, so that if the application throws an error in a customer's environment, you can debug the error in your own development environment. 

What should you do? 

A. Digitally sign MyApp.dll. 

B. Produce program database (PDB) information when you compile the code. 

C. Compile MyApp.exe by using the /unsafe compiler option. 

D. Initializes a new instance of the AssemblyDelaySignAttribute class in the MyApp.dll constructor. 

Answer: B 

Q37. - (Topic 2) 

You are developing an application that contains a class named TheaterCustomer and a method named ProcessTheaterCustomer. The ProcessTheaterCustomer() method accepts a TheaterCustomer object as the input parameter. 

You have the following requirements: 

. Store the TheaterCustomer objects in a collection. 

. Ensure that the ProcessTheaterCustomer() method processes the TheaterCustomer objects in the reverse order in which they are placed into the collection. 

You need to meet the requirements. 

What should you do? 

A. Create a System.Collections.Queue collection. Use the Enqueue() method to add TheaterCustomer objects to the collection. Use the Dequeue() method to pass the objects to the ProcessTheaterCustomer() method. 

B. Create a System.Collections.ArrayList collection. Use the Insert() method to add TheaterCustomer objects to the collection. Use the Remove() method to pass the objects to the ProcessTheaterCustomer() method. 

C. Create a System.Collections.Stack collection. Use the Push() method to add TheaterCustomer objects to the collection. Use the Pop() method to pass the objects to the ProcessTheaterCustomer() method. 

D. Create a System.Collections.Queue collection. Use the Enqueue() method to add TheaterCustomer objects to the collection. Use the Peek() method to pass the objects to the ProcessTheaterCustomer() method. 

Answer: C 

Explanation: A stack is the appropriate collection here. In computer science, a stack or LIFO (last in, first out) is an abstract data type that serves as a collection of elements, with two principal operations: push, which adds an element to the collection, and pop, which removes the last element that was added. 

Reference: https://en.wikipedia.org/wiki/Stack_(abstract_data_type) 

Q38. - (Topic 1) 

You are developing an application by using C#. 

The application includes an object that performs a long running process. 

You need to ensure that the garbage collector does not release the object's resources until the process completes. 

Which garbage collector method should you use? 

A. WaitForFullGCComplete() 

B. SuppressFinalize() 

C. WaitForFullGCApproach() 

D. WaitForPendingFinalizers() 

Answer: B 

Q39. DRAG DROP - (Topic 1) 

You are developing an application that implements a set of custom exception types. You declare the custom exception types by using the following code segments: 

The application includes a function named DoWork that throws .NET Framework exceptions and custom exceptions. The application contains only the following logging methods: 

The application must meet the following requirements: 

. When ContosoValidationException exceptions are caught, log the information by using the static void Log (ContosoValidationException ex) method. . When ContosoDbException or other ContosoException exceptions are caught, log the information by using the static void Log(ContosoException ex) method. 

You need to meet the requirements. 

How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.) 

Answer: 

Q40. - (Topic 1) 

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? 

A. ECDsa 

B. RNGCryptoServiceProvider 

C. Rfc2898DeriveBytes 

D. HMACSHA512 

Answer: D