Comp SCI NWC Test 2

Landon Van Berkuk, Based on quizzes 67 8

Interactive Loop

Will stop looping unless "told" to continue

Sentinel Loop

Will keep looping unless "told" to stop

Pre-Test Loop

May not loop at all, depending on initial conditions

Definite Loop

Knows exactly how many times it will iterate ahead of time

Indefinite Loop

Doesn't know how many times it will iterate

True or False: Tuples are ordered, but Dictionaries are unordered.

True

What will the following code print out?

x = 10

for i in range(1,4):

    x = x * i

    for k in range(1,4):

        x = x - k

print(x)

0

Given the following list of lists, which statement will access the 'X'?

table = [['O', 'O', 'O'],

         ['X', 'O', 'O'],

         ['O', 'O', 'O']]

table[1][0]

Consider the following code snippet. How many times will statement #1 be run?

x = 400

for i in range(5):

    for k in range(6):

        # Statement #1

        x = x - (i*k)

    # Statement #2

    x = x * i

5×6=30

Consider the following code snippet. How many times will statement #2 be run?

x = 400

for i in range(5):

    for k in range(6):

        # Statement #1

        x = x - (i*k)

    # Statement #2

    x = x * i

5

What does the following code snippet print out?

def recur(a, b):

    if a == 0:

        return b

    elif b == 0:

        return a

    else:

        return 1 + recur(a-1, b-1)

print(recur(4,6))

6. 2+1+1+1+1=6.