Who is the author of the book "Breaking the  Mould:

Which key uniquely identifies a record in a table?

What is the output of the following pseudo-code? 

 ```

    count = 0

    for i from 1 to 3:

Which aggregate function returns the number of rows that match a specified criterion?

Which of the following concurrency control methods avoids deadlocks entirely but can reduce concurrency by blocking transactions at start?

If every non-key attribute is functionally dependent on the primary key, the relation will be in

You have a Python list of fruits and want to extract a specific sub-list using slicing.

In a relational database, what is a candidate key?

Which of the following is a key difference between a file system and a Relational Database Management System (RDBMS)?

What will be the value of `x` after the following pseudo-code execution? 

```

    x = 0

    data = [10, 20, 30]

Distributed 2-Phase Commit (2PC) can suffer from: