![c) List<Task>);
d) ITaskConcurrent;
e) Thread;
10. What is correct sentence for next code?
a) finalTask.WaitAll()
b) finalTask.WaitChild()
c) finalTask.Wait()
d) await finalTask;
e) await finalTask.WaitAll();
Task<Int32[]> parent = Task.Run(() =>
{
var results = new Int32[3];
TaskFactory tf = new TaskFactory(TaskCreationOptions.AttachedToParent,
TaskContinuationOptions.ExecuteSynchronously); tf.StartNew (() =>
results[0] =0); tf.StartNew (() =>results[1] =1); tf.StartNew (() =>
results[2] =2); return results;
});
var finalTask = parent.ContinueWith(
parentTask=> {
foreach(int iin parentTask.Result)
Console.WriteLine(i);
});
____________________________
11. Which code can create a lambda expression?
a) delegate x = x => 5 + 5;
b) delegate MySub(double x); MySub ms = delegate(double y) { y * y; }
c) x => x * x;
d) delegate MySub(); MySub ms = x * x;
12. Which collection would you use if you need to quickly find an element by its key
rather than its index?](https://image.slidesharecdn.com/pruebadeconociemientosfullsctacknetv2-220413133252/85/Prueba-de-conociemientos-Fullsctack-NET-v2-docx-3-320.jpg)
![}, token);
Console.WriteLine(“Press enter to stop the task”);
Console.ReadLine();
cancellationTokenSource.Cancel();
Console.WriteLine(“Press enter to end the
application”);
Console.ReadLine();
17. Which of the following regular expressions matches license plate values that must
include three uppercase letters followed by a space and three digits, or three digits
followed by a space and three uppercase letters?
a) (^d{3} [A-Z]{3}$)|(^[A-Z]{3} d{3}$)
b) ^d{3} [A-Z]{3} [A-Z]{3} d{3}$
c) ^w{3} d{3}|d{3} w{3}$
d) ^(d{3} [A-Z]{3})?$
18. You have declared an event on your class, and you want outside users of your class
to raise this event. What do you do?
a) Make the event public.
b) Add a public method to your class that raises the event.
c) Use a public delegate instead of an event.
d) Use a custom event accessor to give access to outside users.
19. What describes a strong name assembly?
a) Name
b) Version
c) Public key token
d) Culture
e) Processor Architecture
f) All the above
20. You have declared an event on your class, and you want outside users of your class
to raise this event. What do you do?
a) Make the event public
b) Add a public method to your class that raises the event.
c) Use a public delegate instead of an event.
d) Use a custom event accessor to give access to outside users.](https://image.slidesharecdn.com/pruebadeconociemientosfullsctacknetv2-220413133252/85/Prueba-de-conociemientos-Fullsctack-NET-v2-docx-5-320.jpg)
Prueba de conociemientos Fullsctack NET v2.docx
- 1. Test Knowledge C# - Backend Requirements for test: - Visual Studio 2019 - SQL Express - Management Studio PART A – Basic Knowledge 1. You are creating a complex query that doesn’t require any particular order and you want to run it in parallel. Which method should you use? a) AsParallel b) AsSequential c) AsOrdered d) WithDegreeOfParallelism 2. You need to implement cancellation for a long running task. Which object do you pass to the task? a) CancellationTokenSource b) CancellationToken c) Boolean isCancelled variable d) Volatile 3. You need to iterate over a collection in which you know the number of items. You need to remove certain items from the collection. Which statement do you use? a) switch b) foreach c) for d) goto 4. You have declared an event on your class, and you want outside users of your class to raise this event. What do you do? a) Make the event public. b) Add a public method to your class that raises the event. c) Use a public delegate instead of an event. d) Use a custom event accessor to give access to outside users. 5. Your code catches an IOException when a file cannot be accessed. You want to give more information to the caller of your code. What do you do? a) Change the message of the exception and rethrow the exception.
- 2. b) Throw a new exception with extra information that has the IOException as InnerException. c) Throw a new exception with more detailed info. d) Use throw to rethrow the exception and save the call stack. 6. Suppose you want to sort the Recipe class by any of the properties MainIngredient, TotalTime, or CostPerPerson. In that case, which of the following interfaces would probably be most useful? a) IDisposable b) IComparable c) IComparer d) ISortable 7. What is the final result by execute next code: a) Error compilation b) Return string if call contain using await c) Return a Task and execute code synchronous d) Can not using async for static Methods e) C# not return Task public static async Task<string> DownloadContent() { using(HttpClient client= new HttpClient()) { string result= await client.GetStringAsync(“http://www.microsoft.com”); return result; } } 8. In a multithreaded application how would you increment a variable called counter in a lock free manner? Choose all that apply. a) lock(counter){counter++;} b) counter++; c) Interlocked.Add(ref counter, 1); d) Interlocked.Increment (counter); e) Interlocked.Increment (ref counter); 9. If I need create similar to the way a database connection pooling works but using Task, what is a better option? a) ThreadPool b) TaskFactory;
- 3. c) List<Task>); d) ITaskConcurrent; e) Thread; 10. What is correct sentence for next code? a) finalTask.WaitAll() b) finalTask.WaitChild() c) finalTask.Wait() d) await finalTask; e) await finalTask.WaitAll(); Task<Int32[]> parent = Task.Run(() => { var results = new Int32[3]; TaskFactory tf = new TaskFactory(TaskCreationOptions.AttachedToParent, TaskContinuationOptions.ExecuteSynchronously); tf.StartNew (() => results[0] =0); tf.StartNew (() =>results[1] =1); tf.StartNew (() => results[2] =2); return results; }); var finalTask = parent.ContinueWith( parentTask=> { foreach(int iin parentTask.Result) Console.WriteLine(i); }); ____________________________ 11. Which code can create a lambda expression? a) delegate x = x => 5 + 5; b) delegate MySub(double x); MySub ms = delegate(double y) { y * y; } c) x => x * x; d) delegate MySub(); MySub ms = x * x; 12. Which collection would you use if you need to quickly find an element by its key rather than its index?
- 4. a) Dictionary b) List c) SortedList d) Queue 13. My.com is a company with kind of 20 TPS and have error for access a list, how to improve performance and robust a) Using lock by list b) Controller error though try catch c) BlockingCollection<T> d) ConcurrentBag<T> 14. Which ADO.NET object is a fully traversable cursor and is disconnected from the database? a) DBDataReader b) DataSet c) DataTable d) DataAdapter 15. Which clause orders the state and then the city? a) orderby h.State orderby h.City b) orderby h.State thenby h.City c) orderby h.State, h.City d) orderby h.State, thenby h.City 16. What is property correct for this sentence a) IsCancellationRequested b) IsCancel c) Syntaxis is damaged d) StatusRequested Task task = Task.Run(() => { while(!token.__________________) { Console.Write(“*”); Thread.Sleep(1000); }
- 5. }, token); Console.WriteLine(“Press enter to stop the task”); Console.ReadLine(); cancellationTokenSource.Cancel(); Console.WriteLine(“Press enter to end the application”); Console.ReadLine(); 17. Which of the following regular expressions matches license plate values that must include three uppercase letters followed by a space and three digits, or three digits followed by a space and three uppercase letters? a) (^d{3} [A-Z]{3}$)|(^[A-Z]{3} d{3}$) b) ^d{3} [A-Z]{3} [A-Z]{3} d{3}$ c) ^w{3} d{3}|d{3} w{3}$ d) ^(d{3} [A-Z]{3})?$ 18. You have declared an event on your class, and you want outside users of your class to raise this event. What do you do? a) Make the event public. b) Add a public method to your class that raises the event. c) Use a public delegate instead of an event. d) Use a custom event accessor to give access to outside users. 19. What describes a strong name assembly? a) Name b) Version c) Public key token d) Culture e) Processor Architecture f) All the above 20. You have declared an event on your class, and you want outside users of your class to raise this event. What do you do? a) Make the event public b) Add a public method to your class that raises the event. c) Use a public delegate instead of an event. d) Use a custom event accessor to give access to outside users.
- 6. 21. The IEnumerable and IEnumerator interface in .NET helps you to implement the iterator pattern, which enables you to access all elements in a collection without caring about how it’s exactly implemented. You can find these interfaces in the System.Collection and System.Collections. Generic namespaces. When using the iterator pattern, you can just as easily iterate over the elements in an array, a list, or a custom collection. It is never used in LINQ, which can access all kinds of collections in a generic way without actually caring about the type of collection. a) True b) False 22. What is this method for? a) Create class b) Finalizer c) Ignore errors d) Execute garbage collector.
- 7. PART B – ASP NET Knowledge 23. What is the technique in which the client sends a request to the server, and the server holds the response until it either times out or has information to send to the client is? a) HTTP polling. b) HTTP long polling c) WebSockets d) HTTP request-response e) HTTP2 24. What is the first request sent to start HTTP polling? a) HTTP DELETE. b) HTTP GET c) HTTP CONNECT d) Upgrade request 25. You create a LINQ query as follows. Which of the statements is correct? a) A foreach loop is needed before this query executes against the database. b) NavigationProperty needs to be referenced before this query executes against the database c) The query returns results immediately d) It depends on whether the LazyLoadingEnabled property is set. var query = (from acct in context.Accounts where acct.AccountAlias == "Primary" selectAcct).FirstOrDefault(); 26. Assume you call the Add method of a context on an entity that already exists in the database. Which of the following is true? (Choose all that apply.) a) A duplicate entry is created in the database if there is no key violation. b) If there is a key violation, an exception is thrown c) The values are merged using a first-in wins approach. d) The values are merged using a last-in wins approach. 27. What happens if you attempt to Attach an entity to a context when it already exists in the context with an EntityState of unchanged? a) A copy of the entity is added to the context with an EntityState of unchanged. b) A copy of the entity is added to the context with an EntityState of Added. c) Nothing happens and the call is ignored.
- 8. d) The original entity is updated with the values from the new entity, but a copy is not made. The entity has an EntityState of Unchanged. 28. The application you’re working on uses the EF to generate a specific DbContext instance. The application enables users to edit several items in a grid and then submit the changes. Because the database is overloaded, you frequently experience situations that result in only partial updates. What should you do? a) Call the SaveChanges method of the DbContext instance, specifying the UpdateBehavior.All enumeration value for the Update behavior. b) Use a TransactionScope class to wrap the call to update on the DbContext instance. c) Create a Transaction instance by calling the BeginTransaction method of the DbContext Database property. Call the SaveChanges method; if it is successful, call the Commit method of the transaction; if not, call the Rollback method. d) Use a TransactionScope class to wrap the call to SaveChanges on the DbContext. Call Complete if SaveChanges completes without an exception. 29. The application you’re working on uses the EF. You need to ensure that operations can be rolled back if there is a failure and you need to specify an isolation level. Which of the following would allow you to accomplish this? (Choose all that apply.) a) A EntityTransaction. b) A TransactionScope. c) A SqlTransaction. d) A DatabaseTransaction. 30. Which interfaces must be implemented in order for something to be queried by LINQ? (Choose all that apply.) a) IEnumerable. b) IQueryable. c) IEntityItem. d) IDbContextItem.
- 9. 31. Next code is used for: a) Create Action Register b) Create a Route in which the action name. c) Create Method for configuration request d) Create Register Website. public static void Register(HttpConfiguration config) { config.Routes.MapHttpRout e( name:"NamedApi", routeTemplate: "api/{controller}/{action}/{id}" , defaults:new { id = RouteParameter.Optional } ); config.EnableSystemDiagn osticsTracing(); }
- 10. PART C – PRACTICE Required manage a) .NET 5 b) SQL Server c) C# d) nUnit For the practical exercise, take into account the following evaluation criteria: a) Architecture b) Structure c) Documentation Code d) Best Practices e) Manage Performance f) Unit Test g) Security A bank company requires creating an API to obtain information about properties in the Colombia, this is in a database as shown in the image, its task is to create a set of services, additional create a front end in react or angular (marked to *): a) Create Property Building * b) Add Image from property c) Change Price d) Update property e) List property with filters* Note: Complete data type depend on your criteria and add field according for your consideration
- 11. Release Send solution with project in zip file or upload from github or other similar site. Attach database backup. if is necessary specify steps for run project when download. GOOD LUCK!