Python - 1

In a Python program, a control structure:

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

• Defines program-specific data structures

• 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

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.

• if a < b:

  m = a

  else:

  m = b

• if a < b

  m = a

  else:

  m = b

• if a > b

  m = b

  else

  m = a

• if a < b

  m = a

  else

  m = b

Which of the following are true of Python dictionaries:

• Dictionaries can be nested to any depth.

• Dictionaries are accessed by key.

• Items are accessed by their position in a dictionary.

• Dictionaries are mutable.

What statement will remove the entry in the dictionary for key 'baz'?

• d.remove('baz')

• pop('baz')

• del d['baz']

• del d('baz')

Once again consider this dictionary:

d = {'foo': 100, 'bar': 200, 'baz': 300}

What is the result of this statement: d['bar':'baz']

• It raises an exception

• [200, 300]

• (200, 300)

• 200 300

The Python interpreter takes the code that you write and converts it to the language that the computer’s hardware understands.

Is this statement True or False?

• True

• False

In the Python statement x = a + 5 - b:

a and b are ________

a + 5 - b is ________

• terms, a group

• operators, a statement

• operands, an equation

• operands, an expression

Which of the following are true of Python lists?

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

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

• These represent the same list:

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

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

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

for x in range(0.5, 5.5, 0.5):

print(x)

• [0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5]

• [0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5]

• The Program executed with errors