default case must be present

default case, if used, should be the last case

default case, if used, can be placed anywhere

none of the above

can always be replaced by a nested it-then-else clause

enhances logical clarity

can't always be replaced by a nested if -then-else clause

Both can always be replaced by a nested it-then-else clause and enhances logical clarity

goto

return

exit

any of the above features

prints nothing

results in a syntax error

prints four 0

none of the above

a>b

a<b

a==b

none of above