Suppose you had a raw video in very good quality (at 20Mbps bitrate). Obviously, you can’t stream this video to end-user where network bandwidth and speed is limited. So, you transcode this video at various bitrates 2Mbps, 1Mbps, …

Compared to original video, quality of this transcoded video will be less. We can see it with naked eye. At around 2-3Mbps, we won’t notice any difference but as bitrate starts going below 1Mbps, the difference is significantly noticeable.

If I have a digitally signed document, how do I verify if it is really signed ? How can I ensure that it is more than just a green tick photoshop ?

What if the amount of Rs. 10000 in document is tampered and made Rs. 100000 after I signed it ? What exactly happens when we digitally sign a document ? How secure is this system ?

Say I want to sign a document then two keys will be created.

We know the difference between syntactic and semantic search.

• Syntactic search is keyword based.
  Searching for Backend Engineer returns results like backend engineer or back-end engineer.

• Semantic search is meaning based.
  The same query can also return platform engineer, api developer, etc.

This difference exists because semantic search does not operate on raw text. Instead, both queries and documents are converted into vector embeddings — numerical representations that capture semantic meaning.