quiz 2

A data type consisting of numbers, letters and symbols.

• String
• Integer
• Float
• Boolean

Code repeated / looped until a condition has been met or a set number of times.

• Sequence
• Selection
• Iteration
• Variable

Count controlled loop - code executed a given number of times

• While loop
• For loop
• Repeat loop
• If...else

What will be the output of the following Python code snippet?

d = {"john":40, "peter":45}

"john" in d

• True

• False

What will be the output of the following Python code snippet?

d = {"john":40, "peter":45}

d["john"]

• 40

• 45

• “john”

• “peter”

Suppose d = {“john”:40, “peter”:45}, to delete the entry for “john” what command do we use?

• d.delete(“john”:40)

• d.delete(“john”)

• del d[“john”]

• del d(“john”:40)

Suppose d = {“john”:40, “peter”:45}. To obtain the number of entries in dictionary which command do we use?

• d.size()

• len(d)

• size(d)

• d.len()

Which of these about a dictionary is false?

• The values of a dictionary can be accessed using keys

• The keys of a dictionary can be accessed using values

• Dictionaries aren’t ordered

• Dictionaries are mutable

Which of the following is not a declaration of the dictionary?

• {1: ‘A’, 2: ‘B’}

• dict([[1,”A”],[2,”B”]])

• {1,”A”,2”B”}

• { }

What will be the output of the following Python code snippet?

a={1:"A",2:"B",3:"C"}

a.setdefault(4,"D")

print(a)

• {1: ‘A’, 2: ‘B’, 3: ‘C’, 4: ‘D’}

• None

• Error

• [1,3,6,10]