Compsci 101, Fall 2012, September 10

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  1. What is the value of the Python expression "123"*2

    1. "246"

    2. "123123"

    3. error

  2. What is the value of the Python expression int("123")*2

    1. 246

    2. "246"

    3. "123123"

  3. The code below is intended to return the number of vowels in string parameter st: def vcount(st): v = 0 for letter in st: if EXPR: v = v + 1 return v Which of the following can replace EXPR to make the function work as intended (more than one can be correct).

    1. "aeiou".count(letter) > 0

    2. letter in "aeiou"

    3. "aeiou".find(letter) != -1

  4. Which expression correctly prints "even" if a number is even (more than one can be correct)

    1. if number % 2 == 0 : print "even"

    2. if number % 2 != 1 : print "even"

    3. if (number % 2 == 0) == True: print "even"