1. Quite a lot of computer systems do not make a provision for a privileged mode of operation in their hardware. Is it conceivable to design a secure operating system for these computer systems? Give arguments for and against.

What is one way in which tablets differ from laptops and notebooks? tablets are designed for touch-based interaction. tablets are designed to be used as desktops. tablets are designed for input via a keyboard and mouse. tablets are designed to be larger than laptops.

Write a program that asks the user to enter the name of an input file. if the file does not exist, the program should prompt the user to enter the file name again. if the user types quit in any uppercase/lowercase combinations, then the program should exit without any further output.

Write and test a python program to find and print the largest number in a set of real (floating point) numbers. the program should first read a single positive integer number from the user, which will be how many numbers to read and search through. after reading in all of the numbers, the largest of the numbers input (not considering the count input) should be printed.