CSE 3901 FINAL PAPER REVIEW SHEET UPDATED QUESTIONS AND SOLUTIONS

CSE 3901 FINAL PAPER REVIEW SHEET
UPDATED QUESTIONS AND SOLUTIONS

●● the project itself
Answer: github: what is a working tree?


●● hidden directory (.git) in root directory of working tree


User never accesses .git directly


Store records project development history
Answer: github: what is a store?


●● DAG of commits
Each commit represents a complete snapshot of the entire project
Answer: github: what is history?


●● virtual snapshot stored in .git/index
Answer: github: what is an index?


●● a pointer to a commit
Answer: github: what is a branch?

,●● git branch nameOfBranch
Answer: github: command to create a new branch


●● git checkout fix
Answer: github: change to branch titled 'fix'


●● git add --all .
git commit
Answer: github: add and commit changes to local store


●● http://web.cse.ohio-state.edu/~giles/3901/lectures/lecture02.pdf
Answer: github: problem on slide 42 http://web.cse.ohio-
state.edu/~giles/3901/lectures/lecture02.pdf


●● 0, 1, 2, 3, 4
Answer: ruby: what is the following range 0..4


●● 0, 1, 2, 3
Answer: ruby: what is the following range 0...4


●● Returns -1/0/1 if LHS is smaller/equal/larger than RHS

,Answer: ruby: what does the <=> operator do?


●● -1
Answer: ruby: what does "cab" <=> "da" return?


●● 1
Answer: ruby: what does "cab" <=> "ba" return?


●● i = 34, j = 35
Answer: i = 34
j = i # i and j are aliases
j = j + 1 # does this increment i too?
what is the value of i and j?


●● prints 0 to 24
Answer: what does the following statement do?
i = 10
25.times { | i | puts i }


●● "tania".length
Answer: ruby: write a statement that returns the length of your name

, ●● "exam".reverse
Answer: ruby: write a statement that reverses the word "exam"


●● puts "Tania".upcase
Answer: ruby: write a statement that prints "Tania" in uppercase


●● puts "Tania".downcase
Answer: ruby: write a statement that prints "Tania" in lowercase


●● puts "What is your first name?"
name = gets.chomp
puts "Your first name is #{name.capitalize!}"
Answer: ruby: write a statement that asks for the users first name and
prints the result in the following format: Your first name is (name). The
name should be capitalized


●● for i in 1..20
next if i % 2 != 0
puts i
end
Answer: ruby: write a for loop that prints all even numbers between 1
and 20