[General] Do you know what is xxx/what xxx is?

[jiaruchan]

Do you know what is xxx/what xxx is?

Are both ways acceptable? Thank you.

 

[emsr2d2]

Do you know what is xxx/what xxx is?

Are both ways acceptable? Thank you.

Only the second choice is correct. In a simple question like this, the verb (to be) goes the end.

This is a book.
Do you know what this is?

The book is on the table.
Do you know where the book is?