tools of the trade linux and sql coursera weekly challenge 4 answers
Test your knowledge: SQL and databases
1. Which statement accurately describes the organization of a relational database?
- Relational databases consist of a single table with one primary key and one foreign key.
- Relational databases contain tables that are related to each other through primary and foreign keys.
- Relational databases consist of a single table containing related information.
- Relational databases contain primary keys with at least two duplicate values.
2. What is SQL used for? Select two answers.
- Finding data to support security-related decisions and analysis
- Allowing users to access a specific machine
- Securing an organization’s systems and networks
- Creating, interacting with, and requesting information from a database
3. A record of attempts to connect to an organization’s network is one example of a log.
- True
- False
4. Fill in the blank: A request for data from a database table or a combination of tables is called a _____.
- query
- log
- key
- row
Test your knowledge: SQL queries
5. What is filtering in SQL?
- Removing invalid records
- Removing unnecessary data from the database
- Selecting data that match a certain condition
- Changing a table to match a condition
6. You are working with the Chinook database and want to return the firstname, lastname, and phone of all employees. Replace --??? with the missing information to complete the query. (If you want to undo your changes to the query, you can click the Reset button.)
What is Andrew Adams' phone number?
- +1 (403) 262-3443
- +1 (780) 428-9482
- +1 (780) 836-9987
- +1 (403) 467-3351
7. A security analyst wants to filter the log_in_attempts table for records where the value in the country column is 'Canada'. What is a valid query for this?
WHERE country = ‘Canada’
SELECT *
FROM log_in_attempts;
SELECT *
FROM log_in_attempts
WHERE country = ‘Canada’;
SELECT WHERE country = ‘Canada’
FROM log_in_attempts;
SELECT *
FROM log_in_attempts
WHERE country = Canada;
8. Which pattern matches with any string that starts with the character 'A'?
- ‘%A%’
- ‘%A’
- ‘A%’
- ‘A’
Shuffle Q/A 1
Test your knowledge: More SQL filters
9. Which filter outputs all records with values in the date column between '01-01-2015' (January 1, 2015) and '01-04-2015' (April 1, 2015)?
- WHERE date BETWEEN ’01-01-2015′ AND ’01-04-2015′;
- WHERE date BETWEEN ’01-01-2015′, ’01-04-2015′;
- WHERE date < ’01-04-2015′;
- WHERE date > ’01-01-2015′;
10. Which operator is most efficient at returning all records with a status other than 'successful'?
- OR
- NOT
- BETWEEN
- AND
