Crowdly

What error is raised by int("12.5")?

TypeError

SyntaxError

ValueError

AttributeError

Given d = {"a": [1, 2], "b": 3}, what does d.get("c", 0) return?

[0]

None

KeyError

When an Iterator has no more items left to yield, calling the next() function raises which exception?

print ( get_grade (85) )

Consider the following code. What will be the output if score = 85?

def get_grade ( score ):

if score > 50:

return " Pass "

elif score > 75:

return " Distinction "

elif score > 90:

return " Outstanding "

return " Fail "

Fail

Distinction

Outstanding

Pass

if x > 0 and (10 / x > 2) :

Will the following code crash with a ZeroDivisionError?

x = 0

print ( " Valid " )

else :

print ( " Invalid " )

No, because 10 / 0 returns None in Python 3.

Yes, because 10 / 0 is evaluated.

Yes, because Python evaluates conditions from right to left.

No, it will not because of short-circuit mechanism.

What happens when the yield keyword is executed in a generator function?

It raises a StopIteration error.

The function pauses, saves its state, and outputs the yielded value.

The function terminates and its local variables are deleted.

It converts the current loop into a list comprehension.

Which of the following statements about Decorators is TRUE?

They can only be applied to built-in Python functions.

They take a function as an argument and return a new "wrapped" function.

They are used exclusively to speed up loop execution.

They permanently modify the original function's source code.

When reading a JSON file using json.load(), what is the data type of the returned object if the file contains a JSON array of objects?

A Python dictionary

A Python list of dictionaries

A tuple of dictionaries

A string

Which of the following is a CORRECT way to build a functional pipeline that first filters even numbers from a list nums and then squares them?

list(map(lambda x: x**2, filter(lambda x: x%2==0, nums)))

map(lambda x: x**2, filter(lambda x: x%2==0, nums)) (without list)

list(filter(lambda x: x%2==0, map(lambda x: x**2, nums)))

Both (a) and (c) are valid pipelines, but (c) returns an iterator.