Solution :
Here, we need to perform JOIN operation of the students and registration.
Use NATURAL JOIN operator 
and so no need to specify Join condition.
Also we need to selection operator tp select only those course whose major in "philosophy".
Finally we projection operator π to project only distinct students name who took at least three courses.
![$\pi [\sigma_{\text{student's nam}e} [ \sigma(\text{three courses}) \Join \text{"Philosophy"}]]$](https://tex.z-dn.net/?f=%24%5Cpi%20%5B%5Csigma_%7B%5Ctext%7Bstudent%27s%20nam%7De%7D%20%5B%20%5Csigma%28%5Ctext%7Bthree%20courses%7D%29%20%5CJoin%20%5Ctext%7B%22Philosophy%22%7D%5D%5D%24)
Answer:
The answer that goes in the blank is <u>manual</u>
Explanation:
Have a good day :)
Answer:
In order to start engineering you must know the basics Science, Math, and Technology. For example you need math to get all the parts in the right place and fix any pieces that need to be angled right, science because you need to know what happens if you put this with that if it’ll spark break or anything, and technology because you need to know the different pieces and their purpose, hope it helps!
Explanation:
Answer:
True
Explanation:
The ideology of building internal web sites for online social networking among employees is aimed towards productivity.
<em>For example, when an employee is finding a specific job difficult and is connected with someone on the social websites created by the organization, the employee will get help in no time to ensure that the organization achieve maximum productivity.</em>
It will constantly keep each employee informed on the organizations policies, goals and achievements.
However, there are shortcomings of online social networking in the workplace:
- If not properly managed, It might become addictive and will lead to low employee productivity.
- Great intellectual minds might be exposed to negative influences from within the organisation
Answer:
Quality assurance testing plays a very crucial role in the process of software development. It saves money and time by spotting bugs and errors early in the software development life-cycle. Software that is newly developed may have inconsistencies, redundancies, and flaws; therefore, proper QA testing is mandatory.
Explanation:
