Answer
Crawler
Explanation
This is a program that go to various website to read their pages and content provided in order to form entries for a search engine index.All search engines have this program called spider or a bot. It acts as an automated script that browses through the internet to scan the web pages and find words contained in the pages and where the words are used.
Answer:
Synchronization with the document for one reason or another
It depends on what algorithm you’re using.
If you’re going item by item, you’ll be looking at O(n) or O(40000)
Give me a reply if you want to know more, such as if you did binary search what the Big O notation is
You maybe spelled something incorrect