Exception Handling

Consider the following Python code:

try:
    x = int("42")
except ValueError:
    x = "Invalid conversion"
else:
    x += 1

What will be the value of "x" after the execution of this code?

A:

42

B:

"42"

C:

"Invalid conversion"

D:

43

Answer: D

The try block successfully converts the string "42" to an integer. The else block increments the value of "x" by 1.

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What is the purpose of the finally block in Python exception handling?

A:

Define custom exception classes

B:

Terminate the program

C:

Execute code regardless of whether an exception is raised or not

D:

Raise exceptions intentionally

Answer: C

The finally block contains code that will be executed no matter what, whether an exception is raised or not. It is useful for cleanup operations or releasing resources.

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In Python, what will happen if an exception is not caught?

A:

The program will continue executing normally

B:

The program will terminate immediately

C:

The program will prompt the user to handle the exception

D:

The program will enter an infinite loop

Answer: B

If an exception is not caught, the program will terminate abruptly, and an error message will be displayed.

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Which of the following is NOT a built-in exception in Python for handling errors related to accessing a key that does not exist in a dictionary?

A:

KeyError

B:

ValueError

C:

NoSuchKeyError

D:

NameError

Answer: C

NoSuchKeyError is not specifically related to accessing keys in a dictionary.

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Consider the following Python code:

try:
    num = int("abc")
except ValueError:
    print("Invalid conversion")
else:
    print("Conversion successful")

What will be the output of this code?

A:

Invalid conversion

B:

Conversion successful

C:

ValueError: invalid literal for int() with base 10: 'abc'

D:

No output, it will raise an exception

Answer: A

The try block attempts to convert the string "abc" to an integer, resulting in a ValueError. The except block is executed, printing "Invalid conversion."

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Questions for: Exception Handling