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.

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3 years ago

Surprisingly, many of us may be unknowing victims of botnets. Because of the rising sophistication of botnet schemes, your compu

Virty [35]

Answer:

a. Simple rules

1. Upgrade your operating system

2. Upgrade your softwares regularly

3. Upgrade your browser when new additions are available

4. Change your password very often

b. Suspensious signs

1. The operating system and programs take a longer while to start up.

2. It shows lack of storage space despite having space

3. The PC crashes regularly

4. If the sent mails are received as spam

5. The hard disk is working excessively while no programs are currently running

C. All the part of a security incident should be logged.

Explanation: