- Python Test 9 - Dictionary

Which of the following statements create a dictionary?

d = {“john”:40, “peter”:45}

d = {40:”john”, 45:”peter”}

d = {}

All of the mentioned

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

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

“john” and “peter”

“john”, 40, 45, and “peter”

40 and 45

d = (40:”john”, 45:”peter”)

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

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

Error

None

False

True

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

d1 = {"john":40, "peter":45}
 d2 = {"john":466, "peter":45}
 d1 == d2

Error

False

True

None

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

d1 = {"john":40, "peter":45}
 d2 = {"john":466, "peter":45}
 d1 > d2

None

True

False

Error

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

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

“peter”

“john”

45

40

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

del d(“john”:40)

del d[“john”]

d.delete(“john”)

d.delete(“john”:40)

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

len(d)

d.size()

d.len()

size(d)

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

d = {"john":40, "peter":45}
 print(list(d.keys()))

(“john”:40, “peter”:45)

[“john”, “peter”]

[“john”:40, “peter”:45]

(“john”, “peter”)

Suppose d = {“john”:40, “peter”:45}, what happens when we try to retrieve a value using the expression d[“susan”]?

Since “susan” is not a key in the set, Python raises a syntax error

Since “susan” is not a key in the set, Python raises a KeyError exception

Since “susan” is not a value in the set, Python raises a KeyError exception

It is executed fine and no exception is raised, and it returns None