Which sentence is correct?

[julasek]

Which one is correct?
1. When do we have a test?
2. When we have a test?

[bhaisahab]

Which one is correct?
1. When do we have a test?
2. When we have a test?

The first one.

[julasek]

Thanks. "When we have a test?" is what Google Translator told me, but it didn't seem correct, so I wanted to make sure. Apparently, Google Translator lied to me again.

But "Do you know when we have a test?" is correct?

[billmcd]

Thanks. "When we have a test?" is what Google Translator told me, but it didn't seem correct, so I wanted to make sure. Apparently, Google Translator lied to me again.

But "Do you know when we have a test?" is correct? Yes.

As you have suggested, Google is not perfect. I am not familiar with your language, but perhaps if it does not include an equivalent for "do" as some other languages do not, that could be the problem.

[Barb_D]

Thanks. "When we have a test?" is what Google Translator told me, but it didn't seem correct, so I wanted to make sure. Apparently, Google Translator lied to me again.

But "Do you know when we have a test?" is correct?

Welcome to Using English.
Yes, that one is correct. The part that asks "Do you know..." makes the "when we have a test" part go back to the normal order of subject/verb

When we have a test in math class, the teacher makes us hand in our cell phones so we don't use the calculator function.
When do we have a test in math?
We have a test in math tomorrow.

Do you know when we have our next test in math?
Yes, I know when we have our next test in math. Our next test in math is tomorrow.

We didn't have the quiz the teacher told us to expect yesterday. I expect we will have a quiz today instead.