You are developing an application.
The application contains the following code segment (line numbers are included for reference only):

When you run the code, you receive the following error message: "Cannot implicitly convert type 'object'' to 'int'. An explicit conversion exists (are you missing a cast?)."
You need to ensure that the code can be compiled.
Which code should you use to replace line 05?

• A.var2 = ((List<int>)arrayl) [0];
• B.var2 = arrayl[0].Equals(typeof(int));
• C.var2 = (int) arrayl [0];
• D.var2 = arrayl[0] is int;

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HOTSPOT
You are reviewing the following code:

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

Correct Answer:

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You are developing an application in C#.
The application uses exception handling on a method that is used to execute mathematical calculations by using integer numbers.
You write the following catch blocks for the method (line numbers are included for reference only):

You need to add the following code to the method:

At which line should you insert the code?

• A.03
• B.07
• C.05
• D.01

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You are developing an application that uses the Microsoft ADO.NET Entity Framework to retrieve order information from a Microsoft SQL Server database. The application includes the following code. (Line numbers are included for reference only.)

The application must meet the following requirements:
* Return only orders that have an OrderDate value other than null.
* Return only orders that were placed in the year specified in the OrderDate property or in a later year.
You need to ensure that the application meets the requirements.
Which code segment should you insert at line 08?

• A.Where order.OrderDate.Value != null && order.OrderDate.Value.Year > = year
• B.Where order.OrderDate.Value = = null && order.OrderDate.Value.Year = = year
• C.Where order.OrderDate.HasValue && order.OrderDate.Value.Year = = year
• D.Where order.OrderDate.Value.Year = = year

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You have the following code:

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

Correct Answer:

Explanation

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