In which of the following is it possible to lock individual tuples?

Keep practicing — related questions

• In which of the following is it possible to lock at the record level or at the file level?
• Which of the following terms relates to the size of objects that are locked with a single lock operation?
• A transaction can lock a data item in which of the following modes, only if it is not locked at all?
• A transaction can lock a data item in which of the following modes if it is not locked at all?
• Which of the following locking mechanisms is used to lock at the fragment level?
• In which of the following is it possible to lock at the file level, i.e. to lock at the fragment level?
• In which of the following, it is possible to lock at the file level i.e to lock at the fragment level?
• Which of the following schemes in distributed database management consists of locks that has one copy of ea...