Week 7 - DCS2103 (Strings)

Multiple Select

If you write your name on a sticky note and put it on a lunchbox, then peel it off and put it on a new lunchbox — does the old lunchbox magically change into the new one?

• Yes

• No

Draw

Draw the string "HELLO" as a row of boxes. Label positive indexes on top (0 to 4) and negative indexes on the bottom (-5 to -1).

Multiple Choice

What will "Python"[0] return?

• 0
• Python
• P
• N

Multiple Choice

What happens if you try to access "hello"[10]?

• Error

• None

• o

• " "

Multiple Choice

What is the result of "Python"[1:4]?

• Python
• Pytho
• ythn
• yth

Multiple Choice

Which code prints "Pto"?

• "Python"[::2]

• "Python"[1:5:2]

• "Python"[2::2]

• "Python"[::3]

Multiple Choice

Which method makes the first letter uppercase and the rest lowercase?

• upper()

• capitalize()

• title()

• swapcase()

Multiple Choice

What will "hello world".title() return?

• Hello world

• Hello World

• HELLO WORLD

• hello world

Multiple Choice

Output of "banana".count("a") is:

• 2
• 4
• 5
• 3

Multiple Choice

What does "hello".find("l") return?

• 2
• 3
• 1
• -1

Multiple Choice

What will "apple,banana,cherry".split(",") return?

• ['banana', 'cherry']
• ['apple', 'banana']
• ['apple', 'banana', 'cherry']
• ['apple', 'cherry']

Multiple Choice

What will "-".join(["2025", "09", "23"]) return?

• 23-09-2025
• 2025/09/23
• 2025.09.23
• 2025-09-23

Multiple Choice

Which statement about Python strings is TRUE?

• Strings are mutable.

• Strings can be modified in-place.

• Strings are immutable.

• Strings are stored as arrays.

Multiple Choice

What happens when two variables are assigned the same short string in Python?

• Both variables create separate string objects.
• The first variable is deleted from memory.
• Both variables reference the same string object in memory.
• The second variable cannot be assigned a string.

Open Ended

Imagine you are writing a password checker. How could you use isalpha(), isdigit(), and isupper() to validate a user’s password?

Open Ended

How would you clean and format this input string: " PYTHON is Fun! " so that it becomes "Python Is Fun!"? Which string methods would you use?

Thank you!