Core Syntax Flashcards
7 cards from real Python practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Core Syntax flashcards as text
What will `x = [1, 2, 3]; print(x[-1])` output?
Answer: 3
Negative indexing in Python counts from the end; `-1` refers to the last element, which is `3`.
Which of the following correctly unpacks a tuple `t = (10, 20, 30)` into three variables?
Answer: a, b, c = t
Tuple unpacking with `a, b, c = t` assigns each element to a corresponding variable in order.
What is the purpose of the `pass` statement in Python?
Answer: Acts as a placeholder where syntax requires a statement
`pass` is a null operation used as a syntactic placeholder when a block is required but no action is needed.
What does `print(10 % 3)` output?
Answer: 1
The `%` modulus operator returns the remainder of divison; `10 % 3` is `1` because `10 = 3*3 + 1`.
Which of the following is the correct way to write a single-line conditional expression (ternary) in Python?
Answer: x = 1 if cond else 2
Python's ternary expression uses the syntax `value_if_true if condition else value_if_false`.
What is the output of `print(2 ** 3 ** 2)`?
Answer: 512
The `**` exponentiation operator is right-associative, so `2 ** 3 ** 2` = `2 ** 9` = `512`.
Which built-in function returns the number of items in a sequence?
Answer: len()
`len()` is the built-in function that returns the number of items in a sequence or collection.