Answer:
Programmable.
Explanation:
Programmable locks can be changed after they are put in service, allowing for combination or key changes without a locksmith and even allowing the owner to change to another access method (key or combination) to upgrade security. This type of lock are operated using a programmable plastic card and are typically smart.
Answer:
Collaborative filtering
Explanation:
This is one out of five on the Recommender system apart from most popular items, Association and Market Basket based Analysis, Content-based analysis, self and hybrid analysis where we use both content-based and collaborative based approach together. And the Recommender system is a very important topic in Data science. For this question, remember that Collaborative filtering focuses on user and various other user's choices which are mathematically alike to concerned users, and which we find with the study of a large data set. Thus, we can predict from our above study that what are going to be likes of concerned users, and at the item level, whether that item will be liked by the concerned user or not. And this is prediction, and we use this approach in Machine learning these days. For this question, and as mentioned in question the requirements, answer is Collaborative filtering.
Answer:
Destroying all identifiers connected to the data.
Explanation:
Identifiers are your virtual location when navigating, if you destroy your 'Virtual ID', nobody could identify you. Also, you could hide your identifiers, in this case, there's a small risk.
Using the Pythagorean theorem:
200^2 + 200^2 = x^2
x = 282.842712... from the original distance
