CBSE Class 12 Python Quiz

Python code def func(a, b=5): return a * b print(func(3))

• 15

• 8

• Error

• None

Answer explanation

The function 'func' takes two parameters, 'a' and 'b' (default is 5). When calling 'func(3)', 'a' is 3 and 'b' defaults to 5. Thus, it calculates 3 * 5, which equals 15. Therefore, the correct answer is 15.

Python code x = 10 def func(): x = 5 print(x) func() print(x)

• 5, 10

• 10, 5

• 5, 5

• 10, 10

Answer explanation

In the function 'func()', the local variable 'x' is set to 5, so 'print(x)' inside the function outputs 5. The global 'x' remains 10, so 'print(x)' outside the function outputs 10. Thus, the output is 5, 10.

Python code try: print(10 / 0) except ZeroDivisionError: print("Error") finally: print("Done")

• Error

• Error, Done

• Done

• None

Answer explanation

The code attempts to divide by zero, raising a ZeroDivisionError, which is caught by the except block that prints 'Error'. The finally block executes next, printing 'Done'. Thus, the output is 'Error, Done'.

Python code try: num = int("abc") except ValueError: print("Invalid") else: print("Valid")

• Invalid

• Valid

• Error

• None

Answer explanation

The code attempts to convert the string 'abc' to an integer, which raises a ValueError. The except block catches this error and prints 'Invalid', so the correct answer is 'Invalid'.

Python code with open("test.txt", "w") as file: file.write("Hello World") with open("test.txt", "r") as file: print(file.read())

• Hello World

• Error

• None

• Blank

Answer explanation

The code writes 'Hello World' to 'test.txt' and then reads it back. Since the write operation is successful, the output of the read operation is 'Hello World', making it the correct answer.

Python code with open("test.txt", "a") as file: file.write(" Python code") with open("test.txt", "r") as file: print(file.read())

• Hello World Python code

• Python code

• Error

• None

Answer explanation

The code appends ' Python code' to 'test.txt'. If 'test.txt' initially contains 'Hello World', the final content will be 'Hello World Python code'. Thus, the correct answer is 'Hello World Python code'.

Python code import pickle data = {"name": "Alice", "age": 25} with open("data.dat", "wb") as file: pickle.dump(data, file) with open("data.dat", "rb") as file: print(pickle.load(file))

• {"name": "Alice", "age": 25}

• Error

• None

• Blank

Answer explanation

The code uses pickle to serialize a dictionary and save it to a file. It then reads the file and deserializes the data back into a dictionary. The output is the original dictionary: {'name': 'Alice', 'age': 25}.

Python code import pickle with open("data.dat", "wb") as file: pickle.dump([1, 2, 3], file) with open("data.dat", "rb") as file: print(len(pickle.load(file)))

• 3

• Error

• None

• Blank

Answer explanation

The code uses pickle to serialize a list [1, 2, 3] and save it to 'data.dat'. When loading the data, it retrieves the same list. The length of the list is 3, so the output is 3, making it the correct answer.

Python code import csv with open("data.csv", "w", newline="") as file: writer = csv.writer(file) writer.writerow(["Name", "Age"]) writer.writerow(["Alice", 25]) with open("data.csv", "r") as file: reader = csv.reader(file) for row in reader: print(row)

• ["Name", "Age"], ["Alice", "25"]

• Error

• None

• Blank

Answer explanation

The code writes two rows to 'data.csv' and then reads them back. The output will be a list of lists: the header ['Name', 'Age'] and the data ['Alice', '25']. Thus, the correct answer is ['Name', 'Age'], ['Alice', '25'].

Python code import csv with open("data.csv", "w", newline="") as file: writer = csv.writer(file) writer.writerows([["A", "B"], ["C", "D"]]) with open("data.csv", "r") as file: print(file.read())

• A,B C,D

• Error

• None

• Blank

Answer explanation

The code writes two rows to 'data.csv' and then reads the file. The output will be 'A,B C,D' as the rows are written in CSV format. Therefore, the correct answer is 'A,B C,D'.