Describe three types of relationships that can exist between tables in a database
What will be an ideal response?
In a one-to-many relationship a record occurring once in the first table corresponds to many records in the second table. In a many-to-many relationship, the record that is shared in the relationship between two tables occurs multiple times in each table. In a one-to-one relationship, a record in the first table has only one matching record in the second table.
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Hand trace a queue X through the following operations:
``` X.enqueue(new Integer(4)); X.enqueue(new Integer(1)); Object Y = X.dequeue(); X.enqueue(new Integer(8)); X.enqueue(new Integer(2)); X.enqueue(new Integer(5)); X.enqueue(new Integer(3)); Object Y = X.dequeue(); X.enqueue(new Integer(4)); X.enqueue(new Integer(9)); ```
The tools used for gathering and measuring information about visitors to your website, such as how many visitors visit each page, how long do they stay on a page, and so on, are called _______________.
Fill in the blank(s) with the appropriate word(s).
Information you find on Web sites is subjected to strict guidelines to ensure accuracy
a. true b. false
Cryptography provides all of the following except ________.
Fill in the blank(s) with the appropriate word(s).