Question

Sequence the given process for checking whether a string is a palindrome or not, using a deque:
(A) Load the string into the deque.
(B) Continuously remove characters from both ends.
(C) Compare the characters.
(D) Determine if the string is a palindrome based on the comparisons.

• A. (A), (B), (C), (D)
• B. (A), (B), (D), (C)
• C. (B), (A), (C), (D)
• D. (C), (B), (D), (A)

Hint:

A deque allows efficient removal of characters from both ends, making it an ideal data structure for palindrome checking.

Answer 1

The Correct Option is A

Step 1: Load the string into the deque.
To check if a string is a palindrome, we begin by loading the string into a deque data structure. This allows efficient removal of characters from both ends.
Step 2: Remove characters from both ends.
We then continuously remove characters from both ends of the deque for comparison.
Step 3: Compare the characters.
Next, we compare the characters from both ends to check if they match.
Step 4: Determine if it’s a palindrome.
If all the character comparisons are valid (i.e., all characters match from both ends), the string is a palindrome.
Step 5: Conclusion.
The correct sequence is: 1. (A) Load string → 2. (B) Remove characters → 3. (C) Compare characters → 4. (D) Check palindrome.
Final Answer: \[ \boxed{\text{The correct sequence is (A), (B), (C), (D).}} \]