Exam 70-483 topic 2 question 78 discussion

answer D

how about D?

FINAL ANSWER: D.

A would work if signatureAlgo.TransformBlock(fileBuffer, 0, fileBuffer.Length – 1, fileBuffer, 0); signatureAlgo.TransformFinalBlock(fileBuffer, fileBuffer.Length -1, 1); return signatureAlgo.Hash; so its D

I don't understand why you Gentlemen don't use Visual Studio to verify: using System; using System.Collections.Generic; using System.Linq; using System.Security.Cryptography; using System.Text; using System.Threading.Tasks; namespace HashTest { class Program { public static byte[] GetHash(string filename, string algorithmType) { var hasher = HashAlgorithm.Create(algorithmType); var fileBytes = System.IO.File.ReadAllBytes(filename); var x = hasher.ComputeHash(fileBytes); foreach (byte b in x) Console.Write(b); return hasher.Hash; } static void Main(string[] args) { var hash = GetHash(@"c:\test.txt", "SHA1"); Console.WriteLine(); foreach (byte b in hash) Console.Write(b); Console.ReadLine(); } } } You can clearly see that ComputeHash() computes the hash that is later on available in the Hash property. The answer is D.

there is a similar question (#16) on page 22, slightly different answers... but its says correct answer is D

I did couple of tests and I think if D was return hasher.ComputeHash(fileBytes); then yes that would have been it. But you need to call hasher.HashFinal(); before getting the property hasher.Hash. So I think they are right, A is the correct answer to Transform the data before return. BurgSharp is partially correct, we are missing hasher.HashFinal();

Answer D need some change to be correct: var data = hasher.ComputeHash(fileBytes) return data.Hash

whalla d answer

Seems like D is the best answer.

D is the answer

D is correct.

A doesn't make sense with the call to TransformFinalBlock (but should work) D doesn't return a byte array as mentioned I think C is most correct

it is d?

It's D

ComputeHash returns the hash so it is not D