Why does the Bitcoin block header not need to maintain the receipt root hash and state root hash?

Which of the following is TRUE about Load factor (A ) of a hash table? O A cannot exceed 0.5 in Separate Chaining. O A can exceed 1 in Open Addressing. O A can exceed 1 in Separate Chaining. O A cannot exceed 0.5 in Open Addressing.

I am having a hard time finding the right approach for the question. I need a justified answer. Could you please help me through?

For every block chain, what information is always registered within every block? (a)The previous block is hash, (b)The current block is hash, (c)The next block is hash, (d) all the previous block is hash?

The components that determine a hash table's Big-O performance are listed below in decreasing order of importance:

The National Security Agency of the United States created the SHA1 hashing algorithm. Why should you avoid using it at all costs?

Bob designed a new scheme to detect whether a message is modified by an attacker (protecting data integrity). The scheme is to append to each message a SHA-256 hash of that message. Explain the vulnerability of Bob’s design.

The National Security Agency of the United States developed the SHA1 hashing algorithm. What are the potential downsides of its use?

You are employed by the NSA (National Security Agency) and you have received the following   message that contains the following text:   “George Smiley arrived in Prague on Friday evening at 10:50 PM. ……”          See TTS.txt   A quick analysis of text can be achieved by storing each word  in a hash table.  After storing all words in a hash table you will then be able to print all the words stored in each row of the hash table. Requirements:     Create a hash key value (int Key) and init to a prime value (13)     Create an array of string pointers S_ptr[13]     Each string pointer, S_ptr[i], should allocate on the heap an array of strings (size 35)     Initialize all row elements of hash table with ‘#’     Read the text, one word a time, and compute its hash index value (int Hash(string Word)     The Hash function should take the numerical sum of all the characters in the Word and calculate (Sum%Key )which is then output to the program as an Index.  Recognize that output Index can…

Can a shared key be used to encrypt an AES key? Justify your answerHash function is compared to keyed hash function. View an example of a hash function with a single key.