Complete Git Guide: Understand and Master Git and GitHub - Hash Function Overview

The video tutorial introduces hash functions, explaining their one-way nature and consistent output for the same input. It covers popular hash functions like MD5 and SHA, detailing their bit lengths and variations such as SHA-256, SHA-384, and SHA-512. The tutorial demonstrates generating hashes online and highlights the properties of hash functions, including their inability to retrieve the original input. It also explains the hexadecimal format used for hash representation. The video concludes with a brief mention of using command line utilities for hash generation in future lectures.

Which hash function creates a hash that is 128 bits long?

• SHA-256

• SHA-1

• SHA-512

• MD5

What is the bit length of a hash generated by the SHA-1 function?

• 512 bits

• 256 bits

• 160 bits

• 128 bits

When generating a hash for 'Hello World', which hash function produces the longest hash?

• MD5

• SHA-1

• SHA-512

• SHA-256

What is a key characteristic of hash functions regarding input retrieval?

• They are two-way functions.

• They do not allow retrieval of the original input.

• They are reversible.

• They allow easy retrieval of the original input.

Why do hash strings appear as a combination of letters and numbers?

• They are in binary format.

• They are in decimal format.

• They are in hexadecimal format.

• They are in octal format.