CSE 3901 FINAL RAILS ASSESSMENT TEST
2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ Git Working Tree. Answer: project itself
Ordinary directory with files & subdirectories
◉ Git Store. Answer: history of project
◉ Git Index. Answer: virtual snapshot
Gateway for moving changes in the working tree into the store
◉ Git History. Answer: DAG of commits
Each commit represents a complete snapshot of the entire project
◉ Git Revision. Answer: Just the manual editing of the file
◉ Git Commit. Answer: updates head and branch (permanent)
,identified by a hash
◉ Git Branch. Answer: a pointer to a commit
◉ how to add git branch. Answer: git branch branchname
git checkout branchname
◉ how to change git branch. Answer: git checkout branchname
◉ Git Head. Answer: a pointer to a branch
(where you're at)
◉ Git Add. Answer: adds the submission
◉ how to add (all steps). Answer: git add name.rb
git commit -m "comment"
git push remote_name branch_name
◉ Git Checkout. Answer: moves head to look at another branch
◉ Git Merge. Answer: brings two together, adds new commit
,◉ Git Fast-Forward Merge. Answer: bring old into new head
◉ Git Fetch. Answer: bring in commits that given user lacks
◉ Git Push. Answer: opposite to fetch. Give someone a change
◉ Git Pull. Answer: combines fetch and merge
◉ Git No Conflict Merge. Answer: Automatically commits
◉ Distributed version control. Answer: Multiple people, distributed
across network
- each person has their own repository
- units of data movement: changesets
◉ Number of repositories per team. Answer: n+1.
1 shared, 1 local for each
◉ Discard Changes in Git : reset. Answer: git reset --hard
git clean --dry-run
, git clean --force
◉ Discard Commit in Git : reset. Answer: git reset --hard HEAD~1
◉ Strongly Typed Language. Answer: Classes determine valid
operations
◉ Interpreted Program. Answer: Run a program directly, without
compiling
pro:
platform independence
read-eval-print loop (REPL)
reflection
con:
speed
later error detection
◉ Dynamically typed. Answer: objects have types, variables don't
◉ Objects in Ruby?. Answer: Everything
2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ Git Working Tree. Answer: project itself
Ordinary directory with files & subdirectories
◉ Git Store. Answer: history of project
◉ Git Index. Answer: virtual snapshot
Gateway for moving changes in the working tree into the store
◉ Git History. Answer: DAG of commits
Each commit represents a complete snapshot of the entire project
◉ Git Revision. Answer: Just the manual editing of the file
◉ Git Commit. Answer: updates head and branch (permanent)
,identified by a hash
◉ Git Branch. Answer: a pointer to a commit
◉ how to add git branch. Answer: git branch branchname
git checkout branchname
◉ how to change git branch. Answer: git checkout branchname
◉ Git Head. Answer: a pointer to a branch
(where you're at)
◉ Git Add. Answer: adds the submission
◉ how to add (all steps). Answer: git add name.rb
git commit -m "comment"
git push remote_name branch_name
◉ Git Checkout. Answer: moves head to look at another branch
◉ Git Merge. Answer: brings two together, adds new commit
,◉ Git Fast-Forward Merge. Answer: bring old into new head
◉ Git Fetch. Answer: bring in commits that given user lacks
◉ Git Push. Answer: opposite to fetch. Give someone a change
◉ Git Pull. Answer: combines fetch and merge
◉ Git No Conflict Merge. Answer: Automatically commits
◉ Distributed version control. Answer: Multiple people, distributed
across network
- each person has their own repository
- units of data movement: changesets
◉ Number of repositories per team. Answer: n+1.
1 shared, 1 local for each
◉ Discard Changes in Git : reset. Answer: git reset --hard
git clean --dry-run
, git clean --force
◉ Discard Commit in Git : reset. Answer: git reset --hard HEAD~1
◉ Strongly Typed Language. Answer: Classes determine valid
operations
◉ Interpreted Program. Answer: Run a program directly, without
compiling
pro:
platform independence
read-eval-print loop (REPL)
reflection
con:
speed
later error detection
◉ Dynamically typed. Answer: objects have types, variables don't
◉ Objects in Ruby?. Answer: Everything
