Answer Posted / sivaprasad

1)In Array We Can Add any datatype value,Every item in
arraylist is treated as object.
2)Hashtable is collection of key,value pairs
i)Key Can be any datatype
ii)Key Cannot be null refrrence
iii)but value can be null referrence

Retrieving by key in Hashtable is faster than retrieving in
Arraylist,
Example of Arraylist:
Arraylist ar = new Arraylist();
ar.add("X");
ar.add(1);
ar.add(2);
Now if we Retrieve from Arraylist like
foreach(string str in ar)
{

}
It will Compile but it will give Runtime
Error,because '1' and '2' in Arraylist are integers.

Example Hashtable:
Hashtable ht = new Hashtable();
ht.add(1,"sample");
ht.add("2","Test");
ht.add(3,4);
foreach(Dictionaryentry dr in ht.keys.values)
{
Console.Writeline(dr.keys + "=" + dr.values);
}

The Above Code wont give any runtime Error Because We
are iterating through DictionaryEntries(Hashtable
implements IDictionary) it is Collection of Key/Value Pairs

What is a private class in c#?

1043

---

Can mvc be used for desktop applications?

911

---

Is string a data type in c#?

806

---

What is int32?

857

---

Define satellite Assembly in .NET?

938

---

What is an actual parameter?

890

---

What is the difference between integer and double?

867

---

How a two-dimensional array declared in C#?

917

---

What are the Types of compatabilities and explain them

933

---

For methods inside the interface why can’t you specify the accessibility modifier?

915

---

What is strong name in c# and how can we use it?

904

---

what is IDisposal interface,IComparable,IEquatable,IFormatable

969

---

What are logical operators in c#?

903

---

Define delay signing?

892

---

What is the difference between static and private constructor in c#?

957

---