Answers

What happens when the following elements get inserted in an ArrayList?

Sandeep Soni

7y8.3kC#

al.Add(1);
al.Add('1');
al.Add("1");

a) Compilation Error
b) Code works perfectly - Prints 1 ‘1’ “1” if an Console.Write statement is written.
c) System.IndexOutOfRangeException
d) System.InvalidCastException
e) System.StackOverflowException
f) System.IO.IOException

16 Answers

ArrayList is a non-generic collection class. ArrayList can be used to add unknown data i.e. when we do not know the types of data and size of the data.
So Code works perfectly - Prints 1 ‘1’ “1” if an Console.Write statement is written.

Ashish Gangwar4y

a)Compilation Error

sameer shaikh6y

In ArrayList, you can store elements of the same type and of the different types. It belongs to the non-generic collection.

so b is right answer.

SANJAY SHARMA7y

please post correct answer… I think code works perfectly.

Muhammad Zubair7y

print 1,1,1

Bidyasagar Mishra7y

Unlike arrays, Arraylist can have objects of different types. So it will work. b.

Tushar Dikshit7y

it will print if it loop trough 1 1 1

Jignesh Kumar7y

b) code works perfectly- print 1,'1',"1"

sushil kumar7y

in c language array hold only same data elements .But in c sharp we store any type of data in arraylist

Amir Khan7y

b) Code works perfectly & Prints 1 1 1

Deepak Vishwakarma7y

It prints 1 1 1

Nikki Nagarkar7y

System.InvalidCastException

Amit Prakash7y

No problem will occur and all the values will get stored into ArrayList

Amit Prakash7y

Since ArrayList is class belongs to Collection, it will hold the heterogeneous types of data. So No problem will occur and all the values will get stored into ArrayList.

Mangesh Kanche7y

b) Since ArrayList is not generically typed it should work perfectly

Alan Moore7y

I used foreach and print every elements with the tostring method, there is no exception and displayed 1 1 1

Kenny Dong7y