Idea of Efficiency and Recursion — Computer Science STD 12 Science — Question

BMI (Body Mass Index) of a person is used as a screening tool to indicate whether the person is underweight, overweight, obese or a healthy weight for his/her height.
BMI is calculated as follows:
Write Python script to calculate the BMI of a person.

What is the importance of a Primary Key in a table? Explain with a suitable example.

Rewrite the following python code after removing any/ all syntactical errors with each correction underlined:

Write one characteristic each for 2G and 3G Mobile technologies. 

What is the difference between video conferencing and chat?   

Differentiate between packet switching and message switching technique in network communication.

Write a program to read the content of the file line by line and display. Assuming that file name is “multiline.txt”. 

Write a python program to accept a list for the user and create another list which will double of x list. Create the line chart for the same.

Observe the following STUDENTS and EVENTS tables carefully and write the name of the RDBMS operation which will be used to produce the output as shown in LIST ? Also, find the Degree and Cardinality of the LIST.

Consider the following randomly ordered numbers stored in a list
786, 234, 526, 132, 345, 467,
Show the content of list after the First, Second and Third pass of the bubble sort method used for arranging in ascending order?
Note: Show the status of all the elements after each pass very clearly underlining the changes.