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Python Programming - Tricky Questions

Exercise : Tricky Questions - General Questions
  • Tricky Questions - General Questions
6.
What will be the output of the following Python code? 
def outer_function(x):
    def inner_function():
        return x + 1
    return inner_function

closure = outer_function(5)
result = closure()
print(result)
5
6
11
This code will result in an error.
Answer: Option
Explanation:
The inner_function is a closure that "remembers" the value of x from its enclosing scope. When closure() is called, it returns 5 + 1, resulting in the output 6.
7.
What is the output of the following Python code? 
def mysterious_function(a, b=[]):
    b.append(a)
    return b

result1 = mysterious_function(1)
result2 = mysterious_function(2)
result3 = mysterious_function(3)

print(result1 + result2 + result3)
[1, 2, 3, 1, 2, 3, 1, 2, 3]
[1, 2, 3]
[1, 2, 3, 3, 3, 3, 3, 3, 3]
This code will result in an error.
Answer: Option
Explanation:
The mysterious_function appends the value of a to the list b and returns b. In the code, result1 is [1], result2 is [1, 2], and result3 is [1, 2, 3]. When print(result1 + result2 + result3) is executed, it concatenates the three lists, resulting in [1, 2, 3, 1, 2, 3, 1, 2, 3]. Therefore, the output of the code is [1, 2, 3, 1, 2, 3, 1, 2, 3].
8.
What will be the output of the following Python code? 
def power(x, n=2):
    return x ** n

result1 = power(2)
result2 = power(2, 3)

print(result1 + result2)
10
16
12
64
Answer: Option
Explanation:

The code defines a function called power that calculates the power of a number using the ** operator. In the code, result1 is the result of calling power(2), which calculates 2 raised to the power of 2, resulting in 4.

Similarly, result2 is the result of calling power(2, 3), which calculates 2 raised to the power of 3, resulting in 8. The expression result1 + result2 calculates the sum of result1 and result2, resulting in 4 + 8 = 12.

Finally, 12 is printed to the console as the output of the code.

9.
What is the output of the following Python code? 
my_list = [1, 2, 3, 4]
result = [x if x % 2 == 0 else -x for x in my_list]
print(result)
[1, -2, 3, -4]
[-1, 2, -3, 4]
[1, -2, -3, -4]
[1, -2, 3, 4]
Answer: Option
Explanation:
List comprehension is used to create a new list where even numbers are unchanged, and odd numbers are negated.
10.
Consider the following Python code: 
class CustomError(Exception):
    def __init__(self, message):
        super().__init__(message)

raise CustomError("An example custom error.")
What will happen when this code is executed?
The code will run without any errors.
The code will result in a TypeError.
The code will result in a NameError.
The code will raise a custom error of type CustomError.
Answer: Option
Explanation:
The code raises a custom error of type CustomError with the specified message.
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