Are there any fields that all documents in MongoDB must have? A. No, all documents can have completely different fields (they don't even have to match each other). B. Yes, some fields are required in all documents, but they can be computed automatically.

Let's say there is room in the class for only one more student, but two individuals want to sign up for it nevertheless. Why aren't the two pupils allowed to sit in the one remaining empty seat in the database system?

What does the Big O category mean in terms of the execution time of the database? If there is only one more item, then yes. How many deletions are performed per each operation? Not at all, not within the confines of a single advertising. resulting from a single search conducted on the internet?

Suppose we have a record file constructed according to the SimpleDB specificapoints) Suppose we have a record file constructed according to the SimpleDB specifications. That is, the block size is 400 bytes, an integer occupies 4 bytes, a string requires an integer length plus one byte per character, and each slot of a record page has an integer INUSE/EMPTY flag; records do not span multiple pages. For each of the tables in the sample database (and assuming there are many records in each table, not just the given sample data), determine how many records will fit per block (be sure to show your calculations). Is there any wasted space in any of the blocks?tions. That is, the block size is 400 bytes, an integer occupies 4 bytes, a string requires an integer length plus one byte per character, and each slot of a record page has an integer INUSE/EMPTY flag; records do not span multiple pages. For each of the tables in the sample database (and assuming there are many records in each table,…