Answer:
1. False
2. False
3. True
4. False
Explanation:
1. Folders are the containers to store files
2. The delete option deletes the file
3. Files are moved to recycle bin after being deleted, and can be permanently deleted from recycle bin
4. "MS-DOS was the main operating system for IBM PC compatible personal computers during the 1980s, from which point it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system."
<em>source for #4: Wikipedia</em>
Answer:
Option A is correct
Digital Subscriber line is a way where telephone companies provide internet access for connection.
It is a communication medium used to transfer digital signals. DSL is one of the most popular broadband internet access.
Explanation:
DSL stands for Digital Subscriber Line. DSL works with high-speed bandwidth that connects from a phone jack to a telephone network. DSL works within frequencies. You can use the DSL while making phone calls.
Word-processing software includes basic applications designed for casual business or home users and powerful, advanced applications capable of meeting the most-demanding needs of businesses. Many word-processing applications are designed for use as part of a suite or integrated group of word-processing, spreadsheet, and presentation programs
Answer:
69.54
Explanation:
A power ratio of 9000000:1 corresponds to 69.54 dB.
The calculation is presented below:
Formula for calculating Power ratio (db) = 10 * log [P(out)/P(in)]
Since the given ratio is 9000000:1, substituting in the formula gives us 10 * log (9000000/1)
Note that log 9000000 = 6.954
Therefore, 10 * log (9000000/1) = 69.54
Hence the required power ratio in db is 69.54 db.
