Answer: A) Installed
Explanation: Installed application work on the system on which they are installed .They are supposed to persist the required speed of processing to execute the task ,enough memory and other resources as well to fulfill the need of the application functioning.
Other option is incorrect because cloud based application run with help of internet service via web browser so they resources in this applications based on the internet connectivity and browser's speed .Thus, the correct option is option(A).
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:
nahh I'm still in disbelieve
Answer:
The program in Python is as follows:
print("Enter a character followed by a phrase",end='')
word = input(": ")
char = word[0]
print("Occurrence: "+str((word.count(char))-1))
Explanation:
The prints an instruction to the user on how to input to the system
print("Enter a character followed by a phrase",end='')
This prompts and gets the user for input
word = input(": ")
This extracts the character from the input string
char = word[0]
This counts and prints the number of occurrence of the extracted character
print("Occurrence: "+str((word.count(char))-1))
Answer:
It's easier to define text-based programming languages. These are languages that are typed using a keyboard and stored as text files. A graphical or visual language typically uses drag and drop rather than typing. It may use icons or textual labels on blocks or elements.
