Which of the following is true about Python's memory allocation and dynamic typing mechanism?
Option B is correct. In Python, variables are dynamic references to objects stored in heap memory. Python automatically tracks type information with the object itself, not the variable name.
What will be the output of print(type(5 / 2)) in Python 3?
Option B is correct. In Python 3, the single slash '/' operator performs float division, always returning a float result (2.5), whereas '//' performs floor integer division.
Which Python built-in sequence data structure is ordered, indexed, and strictly immutable?
Option C is correct. A Tuple is an ordered, indexed, immutable sequence of elements. Once created, elements cannot be added, removed, or modified.
What will be the output of the slice expression 'Python'[::-1]?
Option B is correct. The slicing syntax [start:stop:step] with a step of -1 reverses the string, resulting in 'nohtyP'.
What is the difference between list.append(x) and list.extend(x) in Python?
Option B is correct. append(x) inserts its argument as a single object at the end of the list. extend(x) takes an iterable argument and appends each item individually.