PCEP PCEP String Operations and Methods 2

Question 1

What is the output of `len('Python 3')`?

Accepted Answer

8

Answer

`len()` counts all characters including spaces, so 'Python 3' has 8 characters.

Question 2

Which method replaces all occurrences of a substring in a string?

Accepted Answer

replace()

Answer

`replace(old, new)` returns a new string with all occurrences of `old` replaced by `new`.

Question 3

What does `'Python'.find('th')` return?

Accepted Answer

2

Answer

`find()` returns the index of the first occurrence of the substring; 'th' starts at index 2.

Question 4

What is the output of `'-'.join(['a', 'b', 'c'])`?

Accepted Answer

a-b-c

Answer

`join()` concatenates list elements with the calling string as a separator between each item.

Question 5

What does `'Hello World'.lower()` return?

Accepted Answer

hello world

Answer

`lower()` converts every character in the string to lowercase.

(PCEP) Certified Entry-Level Python Programmer Practice Test