Question

Consider the string reversal algorithm in Example 5.6. Evaluate reverse(prewt) using a top-down evaluation.

Options:
a) Step-by-step execution
b) Bottom-up execution
c) Recursive execution
d) Iterative execution

Answer 1

The string reversal algorithm in Example 5.6 can be evaluated using a top-down evaluation by reversing the characters in the string 'prewt' step-by-step.

The Correct option is; c) Recursive execution.

Step-by-step explanation:

The string reversal algorithm in Example 5.6 can be evaluated using a top-down evaluation by reversing the characters in the string 'prewt' step-by-step.

In this case, top-down evaluation means starting from the beginning of the string and swapping the first character with the last character, then moving to the second character and swapping it with the second-to-last character, and so on, until all characters have been reversed.

Therefore, the correct option for evaluating reverse(prewt) using a top-down evaluation is a) Step-by-step execution.