uppose you need to store data for a very large number of students in MongoDB. Suppose that the data for each student correspond to the data in the instructor and the teaches relations (given below). How would you represent the above data about students, ensuring that all the data for a particular student can be accessed efficiently in MongoDB? Give an example of the data representation for one student.   Instructor: (ID, name, dept_name, salary)   Teaches: (ID, course_id, sec_­id, semester, year)

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.