CSE 3901 FINAL RAILS COMPREHENSIVE SCRIPT 2026 QUESTIONS AND ANSWERS GUARANTEED TO PASS

CSE 3901 FINAL RAILS COMPREHENSIVE
SCRIPT 2026 QUESTIONS AND ANSWERS
GUARANTEED TO PASS

◉ Arithmetic Operators. Answer: + - ** / % ***


◉ Integer / (div) rounds towards. Answer: negative infinity


◉ .0. Answer: 0.33333333333333333333333


◉ . Answer: 0


◉ -. Answer: -1


◉ -1 % 3. Answer: 2


◉ 25 % 3. Answer: 1


◉ Bitwise Operators. Answer: ~ | & ^ << >>


◉ 5 | 2. Answer: 7

,◉ 13 ^ 6. Answer: 11


◉ 5 << 2. Answer: 20


◉ <=> (spaceship operator). Answer: Returns -1/0/1 iff LHS is
smaller/equal/
larger than RHS


◉ Logical Operators. Answer: && || ! and or not


◉ Precedence of logical operators. Answer: Words have low
precedence (below =)


◉ Pseudo Variables - Objects. Answer: self, nil


◉ Pseudo Variables - Booleans. Answer: true, false


nil is false
all numbers (including 0) are true


◉ Pseudo Variables - Specials. Answer: __FILE__

,__LINE__


◉ Local Variable. Answer: start with lowercase letter (or _)


◉ Global Variable. Answer: start with $


$/ is the input record separator (newline)
$; is the default field separator (space)


◉ Instance Variable. Answer: start with @


◉ Class Variable. Answer: start with @@


◉ Mutability is determined by __________. Answer: variable name


◉ Condition Statements. Answer: if boolean_condition
...
elsif boolean_condition
...
end


unless boolean_condition

, ...
end


◉ Case Statements. Answer: [variable = ] case expression
when nil, value, type, /regexp/, or min..max


else
statements
end


◉ Syntax of while iteration. Answer: while boolean_condition
...
end


or
something while boolean_condition


or
begin ... end while boolean_condition


◉ Syntax of not while iteration. Answer: unless boolean_condition
...