You are developing an application that includes a class named BookTracker for tracking library books. The
application includes the following code segment. (Line numbers are included for reference only.)
01 public delegate void AddBookCallback(int i);
02 public class BookTracker
03 {
04 List<Book> books = new List<Book>();
05 public void AddBook(string name, AddBookCallback callback)
06 {
07 books.Add(new Book(name));
08 callback(books.Count);
09 }10 }
11
12 public class Runner
13 {
14
15 BookTracker tracker = new BookTracker();
16 public void Add(string name)
17 {
18
19 }
20 }
You need to add a book to the BookTracker instance. What should you do?

You are adding a public method named UpdateGrade to a public class named ReportCard. The code region
that updates the grade field must meet the following requirements:
it must be accessed by only one thread at a time.
it must not be vulnerable to a deadlock situation.
You need to implement the UpdateGrade() method. What should you do?

You are developing an application by using C#. You provide a public key to the development team during
development. You need to specify that the assembly is not fully signed when it is built. Which two assembly
attributes should you include in the source code? (Each correct answer presents part of the solution. Choose
two.)

You are developing an application that accepts the input of dates from the user. Users enter the date in their
local format. The date entered by the user is stored in a string variable named inputDate. The valid date
value must be placed in a DateTime variable named validatedDate. You need to validate the entered date
and convert it to Coordinated Universal Time (UTC). The code must not cause an exception to be thrown.
Which code segment should you use?

You are debugging an application that calculates loan interest. The application includes the following code.
(Line numbers are included for reference only.)
01 private static decimal CalculateInterest(decimal loanAmount, int loanTerm,
decimal loanRate)
02 {
03
04 decimal interestAmount = loanAmount * loanRate * loanTerm;
05
06 return interestAmount;
07 }
You need to ensure that the debugger breaks execution within the Calculatelnterest() method when the
loanAmount variable is less than or equal to zero in all builds of the application. What should you do?

You are developing an assembly that will be used by multiple applications. You need to install the assembly in
the Global Assembly Cache (GAC). Which two actions can you perform to achieve this goal? (Each correct
answer presents a complete solution. Choose two.)

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 a method named CreateCounters that will create performance counters for an
application. The method includes the following code. (Line numbers are included for reference only.)
01 void CreateCounters()
02 {
03 if (!PerformanceCounterCategory.Exists(“Contoso”))
04 {
05 var counters = new CounterCreationDataCollection();
06 var ccdCounter1 = new CounterCreationData
07 {
08 CounterName = “Counter1”,
09 CounterType = PerformanceCounterType.SampleFraction
11 };
12 counters.Add(ccdCounter1);
13 var ccdCounter2 = new CounterCreationData
14 {
15 CounterName = “Counter2”,
16
17 };
18 counters.Add(ccdCounter2);
19 PerformanceCounterCategory.Create(“Contoso”, “Help string”,20 PerformanceCounterCategoryType.MultiInstance, counters);
21 }
22 }
You need to ensure that Counter1 is available for use in Windows Performance Monitor (PerfMon). Which
code segment should you insert at line 16?

You are developing an application by using C#. You have the following requirements:
support 32-bit and 64-bit system configurations.
include pre-processor directives that are specific to the system configuration.
deploy an application version that includes both system configurations to testers.
ensure that stack traces include accurate line numbers.
You need to configure the project to avoid changing individual configuration settings every time you deploy the
application to testers. Which two actions should you perform? (Each correct answer presents part of the
solution. Choose two.)

You are developing a C# application that has a requirement to validate some string input data by using the
Regex class. The application includes a method named ContainsHyperlink. The ContainsHyperlink()
method will verify the presence of a URI and surrounding markup. The following code segment defines the
ContainsHyperlink() method. (Line numbers are included for reference only.)
01 bool ContainsHyperlink(string inputData)
02 {
03 string regExPattern = “href\\\\s*=\\\\s*(?:\\”(?<1>[^\\”]*)\\”|(?<1>\\\\S+))”;
04
05 return evaluator.IsMatch(inputData);
06 }
The expression patterns used for each validation function are constant. You need to ensure that the expression
syntax is evaluated only once when the Regex object is initially instantiated. Which code segment should you
insert at line 04?