Answer:
a. OFDM is not classified as a spread spectrum technique, although OFDM has the effect of spreading the signal over a larger frequency spectrum.
Explanation:
Orthogonal Frequency Division Multiplexing is a technique in which large digital data is sent over radio waves by splitting it into multiple subcarriers. The data is then transmitted to different users who can access the files. OFDM is not a spread spectrum technique, it is based on large frequency spectrum.
The correct option is C.
Lithography is a method of printing, which is originally based on the immiscibility of oil and water. Lithography printing basically involves, drawing on limestones with wax crayons, applying ink unto the stone and then printing the image on paper. It was one of the earliest method used to print illustrations.
Answer:
The correct answer to the following question will be "Compacting".
Explanation:
- Compacting is a method that reconstructs the objects and data in a database to minimize the size of its file, thereby making more available space in your disk and allowing you to close and open the database quickly.
- Eliminating wasted space in a file stored. Updating appears to split a file, but saving the file as a copy saves the data manually from the beginning will cause space to be wasted.
Therefore, Compacting is the right answer.
Answer:
yes you are correct
the AND operator narrows
the OR operator broadens your search results
