A join: matches rows from two tables based on the value of a common column. A join that includes rows that don’t have matching values is called:

In Entity Relationship Diagrams, AK refers to:

In relational databases, an attribute is represented by:

Which of the following is NOT true about a primary key?

What does the following query do: delete from instructor                     where dept_name in (select dept_name                                                        from department                                                        where building = ‘Watson’);

An example of an information retrieval system:

Which of the following is NOT an objective of information retrieval?

The size of viruses is usually measured in:

Based on the ICTV classification system, SARS-COV2 belong to which family?

To gain entry into the host cell, viruses need to recognise and bind to specific molecules known as?