Python programming

In Python 3, the maximum value for an integer is 2^63 - 1:

• True

• False

In a Python program, a control structure:

• Defines program-specific data structures

• Dictates what happens before the program starts and after it terminates

• Directs the order of execution of the statements in the program

• Manages the input and output of control characters

What signifies the end of a statement block or suite in Python?

• A comment

• A line that is indented less than the previous line

• end

• }

What is the output of the following code snippet:

if 'bar' in {'foo': 1, 'bar': 2, 'baz': 3}:

print(1)

print(2)

if 'a' in 'qux':

^{.......... ....} print(3)

print(4)

• 1

  2

  4

• 1

  2

  3

  4

• no ouput

• 4

Suppose you have the following variables defined:

a = 100

b = 50

Write a Python if/else statement to assign the smaller of a and b to the variable m.

The following if/elif/else statement will raise a KeyError exception:

d = {'a': 0, 'b': 1, 'c': 0}

if d['a'] > 0:

print('ok')

elif d['b'] > 0:

print('ok')

elif d['c'] > 0:

print('ok')

elif d['d'] > 0:

print('ok')

else:

print('not ok')

• True

• False

Which of the following are valid if/else statements in Python, assuming x and y are defined appropriately:

• if x < y: print('foo'); print('bar'); print('baz')

• if x < y: if x > 10: print('foo')

• if x < y: print('foo') else: print('bar')

• if x < y: print('foo')

  elif y < x: print('bar')

  else: print('baz')

Suppose you have two variables x and y defined. Write a stub if statement to evaluate whether x is less than y. The statement should not do anything, even if the condition is true.

Which of the following are true of Python lists

• A given object may appear in a list more than once

• There is no conceptual limit to the size of a list

• These represent the same list:

  ['a', 'b', 'c']

  ['c', 'a', 'b']

• All elements in a list must be of the same type

• A list may contain any type of object except another list

>>> a = ['foo', 'bar', 'baz', 'qux', 'quux', 'corge']

Several short REPL sessions are shown below. Which display correct output?

• >>> max(a[2:4] + ['grault'])

  'qux'

• >>>

  >>> a[:] is a

• >>> print(a[4::-2])

  ['quux', 'baz', 'foo']

• >>> print(a[-5:-3])

  ['bar', 'baz']

• >>> print(a[-6])

  Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  IndexError: list index out of range