Strings

Topics in this chapter

• String Indexing and Slicing
• String Methods and Manipulation
• String Searching and Validation
• String Immutability and Operators
• String Coding Problems and Palindromes

Cheat sheet

Practice questions

1. Question 1Q-AE296D

   What is printed by the following Python code? s = "banana"; print(s[1:6:2])

   1. A.ban
   2. B.aaa
   3. C.nna
   4. D.ana
   See the answer and solution
2. Question 2Q-1AA662

   What is the output of the following Python code? s = "Mississippi"; print(s.count("s"), s.find("sip"))

   1. A.4 5
   2. B.4 4
   3. C.3 5
   4. D.3 4
   See the answer and solution
3. Question 3Q-E3C877

   Explain string immutability in Python and show how to change the first character of the string "cat" to produce "bat".

   See the answer and solution
4. Question 4Q-2A6C7E

   What is printed by the following Python code? word = "Python"; print(word[-2])

   1. A.t
   2. B.h
   3. C.o
   4. D.n
   See the answer and solution
5. Question 5Q-C714C8

   What is printed by the following Python code? s = " Data Science "; print(s.strip().replace(" ", "_").lower())

   1. A.Data_Science
   2. B.data_science
   3. C.data_science
   4. D.data science
   See the answer and solution