CSE 3901 - Midterm 1 QUESTIONS WITH ANSWERS

CSE 3901 - Midterm 1 QUESTIONS
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WITH ANSWERS |\




github: what is a repository? - CORRECT ANSWERS ✔✔a working
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tree + store + index
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github: what is a working tree? - CORRECT ANSWERS ✔✔the
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project itself |\




github: what is a store? - CORRECT ANSWERS ✔✔hidden
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directory (.git) in root directory of working tree
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|\ User never accesses .git directly
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|\ Store records project development history
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github: what is history? - CORRECT ANSWERS ✔✔DAG of commits
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Each commit represents a complete snapshot of the entire
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project


github: what is an index? - CORRECT ANSWERS ✔✔virtual
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snapshot stored in .git/index|\ |\ |\




github: what is a branch? - CORRECT ANSWERS ✔✔a pointer to a
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commit

,github: command to create a new branch - CORRECT ANSWERS
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✔✔git branch nameOfBranch
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github: change to branch titled 'fix' - CORRECT ANSWERS ✔✔git
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checkout fix |\




github: add and commit changes to local store - CORRECT
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ANSWERS ✔✔git add --all . |\ |\ |\ |\




git commit
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github: problem on slide 42
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http://web.cse.ohio-state.edu/~giles/3901/lectures/lecture02.pdf -
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CORRECT ANSWERS
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✔✔http://web.cse.ohio-state.edu/~giles/3901/lectures/lecture02.p
df


ruby: what is the following range 0..4 - CORRECT ANSWERS ✔✔0,
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1, 2, 3, 4
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ruby: what is the following range 0...4 - CORRECT ANSWERS ✔✔0,
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1, 2, 3
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ruby: what does the <=> operator do? - CORRECT ANSWERS
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✔✔Returns -1/0/1 if LHS is smaller/equal/larger than RHS
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,ruby: what does "cab" <=> "da" return? - CORRECT ANSWERS
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✔✔-1


ruby: what does "cab" <=> "ba" return? - CORRECT ANSWERS
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✔✔1


i = 34
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j = i # i and j are aliases
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j = j + 1 # does this increment i too?
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what is the value of i and j? - CORRECT ANSWERS ✔✔i = 34, j =
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35


what does the following statement do?
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i = 10
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25.times { | i | puts i } - CORRECT ANSWERS ✔✔prints 0 to 24
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ruby: write a statement that returns the length of your name -
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CORRECT ANSWERS ✔✔"tania".length |\ |\




ruby: write a statement that reverses the word "exam" -
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CORRECT ANSWERS ✔✔"exam".reverse |\ |\




ruby: write a statement that prints "Tania" in uppercase -
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CORRECT ANSWERS ✔✔puts "Tania".upcase |\ |\ |\

, ruby: write a statement that prints "Tania" in lowercase -
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CORRECT ANSWERS ✔✔puts "Tania".downcase |\ |\ |\




ruby: write a statement that asks for the users first name and
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prints the result in the following format: Your first name is
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(name). The name should be capitalized - CORRECT ANSWERS
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✔✔puts "What is your first name?"
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name = gets.chomp |\ |\




puts "Your first name is #{name.capitalize!}"
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ruby: write a for loop that prints all even numbers between 1 and
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20 - CORRECT ANSWERS ✔✔for i in 1..20
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|\ next if i % 2 != 0
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|\ puts i |\




end


ruby: write a looping using until that prints numbers 1 to 20 -
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CORRECT ANSWERS ✔✔num = 1 |\ |\ |\ |\




until num > 10
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|\ puts num |\




|\ num += 1 |\ |\




end


What does the following code output?
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def call_block
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|\ puts 'Start of method'
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