Namespaces problems
- 1. If ListBox is class present in System.Windows.Forms namespace, then which of the following statements are the correct way to create an object of ListBox Class?
using System.Windows.Forms; ListBox lb = new ListBox();
using LBControl = System.Windows.Forms; LBControl lb = new LBControl();
System.Windows.Forms.ListBox lb = new System.Windows.Forms.ListBox();
using LBControl lb = new System.Windows.Forms.ListBox;
using LBControl = System.Windows.Forms.ListBox; LBControl lb = new LBControl();
Options- A. 1, 3
- B. 2, 4, 5
- C. 1, 3, 5
- D. 5 only Discuss
Correct Answer: 1, 3, 5
- 2. Which of the following is NOT a namespace in the .NET Framework Class Library?
Options- A. System.Process
- B. System.Security
- C. System.Threading
- D. System.Drawing
- E. System.Xml Discuss
Correct Answer: System.Process
- 3. If a namespace is present in a library then which of the following is the correct way to use the elements of the namespace?
Options- A. Add Reference of the namespace.
Use the elements of the namespace. - B. Add Reference of the namespace.
Import the namespace.
Use the elements of the namespace. - C. Import the namespace.
Use the elements of the namespace. - D. Copy the library in the same directory as the project that is trying to use it.
Use the elements of the namespace. - E. Install the namespace in Global Assembly Cache.
Use the elements of the namespace.
Discuss
Correct Answer: Add Reference of the namespace.
Import the namespace.
Use the elements of the namespace.
- 4. Which of the following statements is correct about a namespace used in C#.NET?
Options- A. Nested namespaces are not allowed.
- B. Importing outer namespace imports inner namespace.
- C. Nested namespaces are allowed.
- D. If nested, the namespaces cannot be split across files. Discuss
Correct Answer: Nested namespaces are allowed.
- 5. Which of the following statements are correct about a namespace used in C#.NET?
- Classes must belong to a namespace, whereas structures need not.
- Every class, struct, enum, delegate and interlace has to belong to some or the other namespace.
- All elements of the namespace have to belong to one file.
- If not mentioned, a namespace takes the name of the current project.
- The namespace should be imported to be able to use the elements in it.
Options- A. 1, 3
- B. 2, 4, 5
- C. 3, 5
- D. 4 only Discuss
Correct Answer: 2, 4, 5
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