@myra Please check this link

PSY403 solved quiz past final mid papers-cyberian.pk.pdf

humm it mean crypto currencies working well and we must think about it.

@zaasmi Programmable Peripheral Interface (PPI)

@zareen said in CS609 Quiz No.2 Solution and Discussion:

What are the 3 types of viruses?

Resident Virus. Resident viruses live in your RAM memory. …

Multipartite Virus. …

Direct Action Virus. …

Browser Hijacker. …

Overwrite Virus. …

Web Scripting Virus. …

Boot Sector Virus. …

Macro Virus.

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@zareen said in CS403 GDB1 Solution and discussion:

Now would you normalize the database or keep your database in de-normalized form.

Although, denormalized schema can greatly improve performance under extreme read-loads but the updates and inserts become complex as the data is duplicate and hence has to be updated/inserted in more than one places.

One clean way to go about solving this problem is through the use of triggers. For example in our case where the orders table has the product_name column as well, when the value of product_name has to be updated, then it can simply be done in the following way:

Have a trigger setup on the products table that updates the product_name on any update to the products table. Execute the update query on the products table. The data would automatically be updated in the orders table because of the trigger.

However, when de-normalizing the schema, do take into consideration, the number of times you would be updating records compared to the number of times you would be executing SELECTs. When mixing normalization and de-normalization, focus on de-normalizing tables that are read intensive, while tables that are write intensive keep them normalized.

link text

1_ As per Bill Inmost, a data warehouse, in contrast with classical applications is:

Data driven _ pg285

2_ Which of the following is NOT one of the three parallel tracks in Kimball’s approach?
Lifecycle Maintenance track

3_ Bill Inmon argues that requirements are well understood only after
Data warehouse is populated _ pg285

4_ Goal driven approach of data warehouse development was result of ______ work
Böhnlein and Ulbrich-vom _ pg285

5_ Identify the TRUE statement:
Clustering is unsupervised learning and classification is supervised learning _ pg 270

6_ Normally the term “DWH face to the business user” refers to:
Lifecycle Analytical Applications track _ pg 306

7_ In ________learning you don’t know the number of clusters and no idea about their attributes.
Unsupervised learning
https://www.cs.uic.edu/~liub/teach/cs583-fall-05/CS583-unsupervised-learning.ppt

8_ Waterfall model is appropriate when
Requirements are clearly defined _ pg 284

9_ Implementation of a data warehouse requires ________ activities.
none of above

10_ Normally the input data structure (a database table) for a data mining algorithm:
Has more number of records than attributes (not sure)

@zareen said in MCM301 GDB 1 Solution and Discussion:

compared to students in a distance learning environment.

The key difference between Live learning and distance learning is geography. Students can be together with an instructor and use online learning, but distance learning implies that students and instructor are separated.

The big differences include:

Location Interaction Intention

A comparison of live and distance teaching and learning has been undertaken to ascertain the focal point that would justify the best-preferred option as far as teaching and learning in DE is concerned. This study is particularly important because as higher education institutions are faced with the challenge of huge number of prospective students seeking higher education in the midst of inadequate infrastructures, it becomes very necessary to look at DE as an option with a combination of different modes of delivering instruction. At the Virtual University of Pakistan, some faculties and departments, especially the distance education department, have adopted the live and online modes of delivering instruction. The pursuit of which would require a critical overview of the two modes to ascertain the strengths, weaknesses and how the two can complement each other for effective delivery of instruction to cater to a large number of students. The review suggested that academics or lecturers should endeavor to adopt the blended or hybrid mode in their teaching and learning. Policy decision makers can also use this study as it provides information on better practices as far as the blended mode of teaching and learning in higher education institutions is concerned.

We should only use the educational tools that fit your needs.

At the same time, we also believe that Live learning is superior to distance learning. But in a pinch, distance learning is still a good way to educate students.