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Course 24013

Course 24013

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A dictionary key can be a mutable object like a list.

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?

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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 "

print ( get_grade (85) )

Fail

Distinction

Outstanding

Pass

Will the following code crash with a ZeroDivisionError?

x = 0

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

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.

✅

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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.

❌

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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.

❌

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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

❌

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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.

✅

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