Complete Git Guide: Understand and Master Git and GitHub - SHA-1 Hash Function

The video tutorial explains hash functions, focusing on SHA-1, and its use in Git. It covers hexadecimal and binary formats, highlighting the differences and uses of each. The tutorial demonstrates generating SHA-1 hashes both online and via command line, emphasizing the impact of small input changes on hash outputs. It concludes with a discussion on Git's use of SHA-1 hashes for file naming.

What is the length of a SHA-1 hash in hexadecimal characters?

• 64 characters

• 40 characters

• 32 characters

• 128 characters

How many characters are used in hexadecimal representation?

• 20 characters

• 10 characters

• 16 characters

• 12 characters

What is the base of the binary format?

• Base 2

• Base 10

• Base 16

• Base 8

Why is hexadecimal format preferred over binary for hash representation?

• It is more secure

• It is faster to compute

• It is easier to read and compare

• It uses fewer characters

What happens to the hash when a small change is made to the input data?

• The hash remains the same

• The hash becomes invalid

• The hash changes slightly

• The hash changes completely

What is the significance of the 'dash N' option in the ECHO command?

• It converts text to lowercase

• It removes a line break

• It converts text to uppercase

• It adds a line break

Which command is used to generate SHA-1 hashes in the terminal?

• SHA1SUM

• SHASUM

• SHA256SUM

• MD5SUM

What is the role of SHA hashes in Git?

• They are used as file names

• They encrypt files

• They compress files

• They delete files

How does Git determine the hash of a file?

• By using the file's name

• By using the file's creation date

• By using the file's size

• By using the file's content

What question is posed at the end of the lecture regarding Git?

• How to encrypt files in Git?

• How many different files can be stored in a Git repository?

• How to delete files in Git?

• How to compress files in Git?