Wait.....What do you mean?
Answer:
C) speech recognition software.
Explanation:
Software that translates the sound of human voice into text is called a speech recognition software.
In Computer science, a speech recognition software is a voice technology application or program which enables the conversion of human voice such as spoken language to computer commands such as text through the use of speech recognition algorithms.
Some examples of speech recognition software are HTK, Kaldi, Voice navigator, Julius etc.
Answer:
Stack.
Explanation:
Topological sort requires a bit of addition to DFS algorithm.So DFS can be done by two ways that are either you can use recursion or you can use Stack data structure to implement DFS.
Since recursion uses stack memory when it makes recursive calls and if you want to do it iteratively you can stack data structure.