Yes but if the hard drive stops working you will lose your files so it's better to backup your files to a cloud like iCloud by Apple.
Answer:
A program is a set of instructions that a computer executes.
An algorithm is a set of instructions that must be done in order to get some result.
If an algorithm is written in a programming language, then the program is an implementation of the algorithm.
An algorithm must not, however, be a program. An algorithm can also be performed manually (e.g. calculate 6431 + 8316 on paper or in your head).
Explanation:
One million is the answer.
The answer is (a.) DOS
DOS stands for Disk Operating System. MS-DOS is the operating system which has a command interface similar to the command prompt of Windows 7 and Windows 8. Among the options, DOS is the only OS which is has a command line interface. Others have graphics.