Is there a difference in meaning between these two sentences?
1. Do you think he will pass the exam?
2. Do you think he would pass the exam?
Thank you very much.
2. is incorrect.
"would" is either a conditional modal, or a past tense of will
Past tense - 3. Did you think he would pass the exam?
Conditional - 4. Do you think he would pass his exam if he studied harder?
For a conditional question, you need a condition.