Python Credential Test

What are the different data types available in Python?

• float

• boolean

• str

• int, float, complex, str, bool, list, tuple, set, dict, None

Answer explanation

The correct data types available in Python are int, float, complex, str, bool, list, tuple, set, dict, None.

Explain the 'if' statement in Python with an example.

• Example: x = 10 if x < 5 else 0

• Example: x = 10 if x > 5 else 0

• Example: x = 5 if x > 10 else 0

• Example: x = 0 if x > 5 else 10

Answer explanation

The 'if' statement in Python is used for conditional execution. In the given example, x will be assigned the value 10 if x is greater than 5, otherwise it will be assigned 0.

Define a function in Python that takes two parameters and returns their sum.

• def sum_two(a, b):\n return a + b

• def add(a, b): return a + b

• def subtract(a, b): return a - b

• def sum(a, b): return a * b

Answer explanation

The correct choice is 'def sum_two(a, b):\n return a + b' because it defines a function that takes two parameters and returns their sum.

How can you read a file in Python?

• open('file.txt', 'r').read()

• read_file('file.txt')

• file.open('file.txt', 'r').read()

• open('file.txt').read()

Answer explanation

To read a file in Python, you can use the 'open' function with the mode 'r' to open the file and then call the 'read' method on it. Therefore, the correct choice is 'open('file.txt', 'r').read()'.

What is the purpose of exception handling in Python?

• Exception handling in Python is primarily used for data manipulation

• Exception handling in Python is designed to create errors intentionally

• Exception handling in Python is used to enhance program performance

• The purpose of exception handling in Python is to handle errors or exceptions that occur during the execution of a program.

Answer explanation

The purpose of exception handling in Python is to handle errors or exceptions that occur during the execution of a program.

Explain the concept of modules and packages in Python.

• Modules are used for storing data in Python, while packages are used for mathematical calculations.

• Modules and packages in Python are the same thing.

• Packages in Python are individual files, while modules are collections of files.

• Modules in Python are files containing Python code that can be imported and used in other Python files. Packages are a way of organizing modules into directories and subdirectories.

Answer explanation

Modules in Python are files containing Python code that can be imported and used in other Python files. Packages are a way of organizing modules into directories and subdirectories.

What is the difference between '==' and 'is' operators in Python?

• '==' compares values, 'is' compares identities.

• '==' compares identities, 'is' compares values.

• '==' compares values, 'is' compares memory addresses.

• '==' compares memory addresses, 'is' compares values.

Answer explanation

In Python, '==' compares values to check if they are equal, while 'is' compares identities to check if they refer to the same object in memory. Therefore, the correct choice is: '==' compares values, 'is' compares identities.

How can you handle multiple exceptions in Python?

• try: # code that may raise exceptions except (Exception1, Exception2) as e: # handle Exception1 and Exception2 except Exception3 as e: # handle Exception3

• try: except Exception1, Exception2 as e: except Exception3 as e: else:

• try: except Exception1, Exception2 as e: except Exception3 as e: finally:

• try: except Exception1, Exception2 as e: except Exception3 as e:

Answer explanation

The correct choice is to use try-except blocks for each exception type separately to handle multiple exceptions in Python.

What is the use of 'finally' block in exception handling?

• To handle multiple exceptions in a single block

• To skip the execution of code in case of an exception

• To execute code that must be run regardless of whether an exception is thrown or not.

• To terminate the program immediately upon an exception

Answer explanation

The 'finally' block is used to execute code that must run regardless of whether an exception is thrown or not, making it essential for cleanup operations.

How can you create a custom module in Python?

• Copy and paste code from existing modules

• Use a built-in module without modification

• Create a new Python interpreter

• Write functions or classes in a separate .py file and import it using 'import' statement

Answer explanation

To create a custom module in Python, you need to write functions or classes in a separate .py file and import it using the 'import' statement.