PCEP Certification Practice: IndexError Questions & Explanations

Question 1: Which of the following best describes the IndexError exception in Python?

1. It is raised when trying to access an element in a dictionary that does not exist.
2. It is raised when trying to access an index that is out of range in a sequence.
3. It is raised when a division by zero is attempted.
4. It is raised when an undefined variable is used.

Question 2: Which of the following operations can raise an IndexError in Python? (Select all that apply.)

• Accessing an out-of-range index in a list.
• Accessing an out-of-range index in a tuple.
• Accessing a non-existent key in a dictionary.
• Slicing a list with an invalid range.

Question 3: The _________ exception is raised when trying to access an index that is out of range for a Python list or tuple.

1. KeyError
2. IndexError
3. TypeError

Question 4: The __________ exception is raised when you attempt to access an index that does not exist in a sequence.

Question 5: Fill in the blank to catch an IndexError when accessing an invalid index in a list:

my_list = [1, 2, 3]
try:
    print(my_list[5])
except __________:
    print("Index out of range")

Question 6: What will happen when you try to access an invalid index in a Python tuple?

1. The program will return None.
2. The program raises an IndexError.
3. The program raises a TypeError.
4. The program will continue execution with no error.

Question 7: Insert the correct exception handling code to catch an IndexError when accessing an out-of-range index in the following code:

my_tuple = (1, 2, 3)
try:
    print(my_tuple[4])
except __________:
    print("Invalid index!")

Question 8: Which of the following data structures can raise an IndexError when accessed with an invalid index? (Select all that apply.)

1. List
2. Tuple
3. String
4. Dictionary

Question 9: In Python, the _________ exception is raised when an invalid index is used to access a list.

• IndexError
• KeyError
• TypeError

Question 10: Attempting to access index 5 in a list of length 3 will raise the __________ exception.

Question 11: Arrange the following exceptions in the correct order, from the highest level to the lowest in the Python exception hierarchy.

1. IndexError
2. LookupError
3. BaseException

Question 12: Which of the following are true about the IndexError exception in Python? (Select all that apply.)

1. It is raised when a sequence index is out of range.
2. It is a subclass of LookupError.
3. It is raised when a dictionary key is missing.
4. It is a direct subclass of KeyError.

Question 13: The abstract exception _________ is the base class for exceptions raised during a failed key or index lookup, such as IndexError.

1. IndexError
2. LookupError
3. TypeError

Question 14: Trying to access an index in a list that is outside the valid range will raise an __________ exception.

Question 15: Fill in the blank to handle an IndexError raised when trying to access an invalid index in a tuple:

my_tuple = (4, 5, 6)
try:
    print(my_tuple[10])
except __________:
    print("Tuple index out of range")

Question 16: Which of the following exceptions is raised when accessing an invalid index in a string?

1. KeyError
2. TypeError
3. IndexError
4. ValueError

Question 17: Insert the correct code to catch an IndexError when trying to access an invalid index in a list:

my_list = ['a', 'b', 'c']
try:
    # INSERT CODE HERE
except IndexError:
    print("Invalid index!")

Question 18: Which of the following operations can raise an IndexError in Python? (Select all that apply.)

1. Accessing index -1 in a list.
2. Accessing index 100 in a list of length 10.
3. Accessing index 5 in a tuple of length 2.
4. Accessing an invalid slice of a list.

Question 19: In Python, the _________ exception is raised when an invalid index is used to access a string.

1. IndexError
2. KeyError
3. TypeError

Question 20: When trying to access index 4 in a tuple with only 2 elements, Python raises the __________ exception.

Question 21: Sort the following exceptions in the correct order from the most general to the most specific.

1. LookupError
2. IndexError
3. BaseException

Question 22: Which of the following data types can raise an IndexError when accessed with an invalid index? (Select all that apply.)

1. List
2. String
3. Tuple
4. Set

Question 23: The exception _________ is raised when you attempt to access an index outside the valid range of a list.

1. IndexError
2. KeyError
3. TypeError

Question 24: Fill in the blank to catch an IndexError when trying to access an invalid index in a string:

my_string = "Python"
try:
    print(my_string[10])
except __________:
    print("String index out of range")

Question 25: What exception is raised when trying to access an invalid index in a Python list?

1. KeyError
2. IndexError
3. TypeError
4. ValueError