Interview Questions(Bank of America)

Question

1) In asp.net,i have images ,css and javascripts.

    when web pages is loaded,some images ans css is not loaded.

    due to this,alignment of web pages is not good.

  my question is how to analyze this and how to fix it.

 

 

2)how to increse performance of web pages . i want to do it at client side.

 

3)in my computer ,internet explorer 10 is installed.

   my question is,how to check web pages at IE6,IE 7,IE8.i do not want to install ie6/7/8.

 

4)i have a dll  . i do not know the code. in dll, i have a .toString() function but it does not support null.

   my question is,i want to add functionality in .toString() so that it support null.how will i do as i do not know the original code.