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?

Match each virus with the most suitable route of transmission

Explain how the following affect stock prices:  (a) aging population (b) increase  in government budget deficit.

The stock of Cruise Services Corp has exhibited the following P/E ratio over the last 5 years 2020         2021         2022         2023         2024  20               18                20             24           28 Its current EPS is $2.55 and the current stock price is $63. You should