Question

Given the following DataFrame df:

PNO	NAME
111	ROHAN
222	MEETA
333	SEEMA
444	SHALU
555	POONAM

Select the correct commands from the following to display the last five rows:

• A. print(df.tail(-5))
• B. print(df.head(-5))
• C. print(df.tail())
• D. print(df.tail(5))

Hint:

Use \texttt{df.head(n)} for first $n$ rows and \texttt{df.tail(n)} for last $n$ rows. Default $n=5$.

Answer 1

The Correct Option is C

Step 1: Recall DataFrame commands.
- \texttt{df.tail()} → returns the last 5 rows by default.
- \texttt{df.tail(n)} → returns the last $n$ rows. So \texttt{df.tail(5)} also gives the last 5 rows.
Step 2: Evaluate given options.
- (A) \texttt{df.tail(-5)} → Invalid, negative values are not allowed.
- (B) \texttt{df.head(-5)} → Invalid, negative index not supported.
- (C) \texttt{df.tail()} → Correct, gives last 5 rows.
- (D) \texttt{df.tail(5)} → Correct, explicitly gives last 5 rows.

Step 3: Conclusion.
The correct commands are (C) and (D).
Final Answer: \[ \boxed{\text{(C) and (D) only}} \]