Question 548992
This can be found using the PRODUCT RULE.  
For the first question there are 4 choices.
For the second question there are 4 choices. 
...
For the ninth question there are 4 choices. 
For the tenth question there are 4 choices.  

This means there are 4^(10) possible ways a student can answer 10 multiple choice questions where each question has 4 options.