Git Git History and Log

Question 1

Which command shows a compact one-line summary of each commit in the log?

Accepted Answer

git log --oneline

Answer

The `git log --oneline` flag formats each commit as a single line showing the abbreviated hash and subject message.

Question 2

What does `git log -p` display?

Accepted Answer

Each commit along with the diff it introduced

Answer

The `-p` (or `--patch`) flag shows each commit entry together with the full diff of changes introduced by that commit.

Question 3

Which command searches the commit log for commits whose message contains a specific string?

Accepted Answer

git log --grep='string'

Answer

The `--grep` flag filters the commit log to show only commits whose message matches the given pattern.

Question 4

How do you view the commit history for a specific file?

Accepted Answer

git log -- <file>

Answer

Using `git log -- <file>` shows only the commits that modified the specified file, with the `--` disambiguating the file path from a branch name.

Question 5

What does the `git shortlog` command produce?

Accepted Answer

A summary of commits grouped by author

Answer

The `git shortlog` command groups commits by author and shows the count and subject lines for each author's commits.

Git Practice Test