C# Interviewfragen und Antworten
Frage 1. What’s the advantage of using System.Text.StringBuilder over System.String?
StringBuilder is more efficient in the cases, where a lot of manipulation is done to the text. Strings are immutable, so each time it’s being operated on, a new instance is created.
Ist das hilfreich?
Kommentar hinzufugen
Kommentare ansehen
Frage 2. Can you store multiple data types in System.Array?
You never use System. Array directly. You can store items whose data type is equivalent to, or derived from, the data type of the array. This means that you can store multiple data types, provided that they derive from a common base type, or implement a common interface.
Example:
If you want to store different types, use System.Collections.ArrayList or object[]
Ist das hilfreich?
Kommentar hinzufugen
Kommentare ansehen
Frage 3. What’s the difference between the System.Array.CopyTo() and System.Array.Clone()?
The first one performs a deep copy of the array, the second one is shallow.
Ist das hilfreich?
Kommentar hinzufugen
Kommentare ansehen
Frage 4. How can you sort the elements of the array in descending order?
By calling Sort() and then Reverse() methods.
Ist das hilfreich?
Kommentar hinzufugen
Kommentare ansehen
Frage 5. What’s the .NET datatype that allows the retrieval of data by a unique key?
HashTable.
Ist das hilfreich?
Kommentar hinzufugen
Kommentare ansehen
Am hilfreichsten laut Nutzern:
- What’s the advantage of using System.Text.StringBuilder over System.String?
- Can you store multiple data types in System.Array?
- What’s the difference between the System.Array.CopyTo() and System.Array.Clone()?
- How can you sort the elements of the array in descending order?
- What’s the .NET datatype that allows the retrieval of data by a unique key?