TS Unit 2 Review for Test

Front

What is the name for this kind of code structure? if color == "red": print("Sounds good! We'll make the car red!") elif color == "blue": print("Sounds good! We'll make the car blue!")

Back

conditional

Answer explanation

Explanation: An if statement, or conditional, is a code structure that makes a decision. It is composed of a line that asks a question, and then one or more indented lines that run or are skipped based on the answer to that question.

Front

What value is in the variable `x` after this code runs?
x = 0
y = 10
if x == y:
x = 100

Back

0

Answer explanation

Explanation: In this case the answer to 'are x and y equal?' is False, and so the line inside the if-statement will not run, meaning x will stay the same.

Front

What value is in the variable `x` after this code runs?
x = 0
y = 10
if x < y:
x = y

Back

10

Answer explanation

Explanation: In this case the answer to 'is the value of x less than y?' is True, and so the line inside the if-statement will run, setting a new x value.

Front

Which of the following is NOT a valid conditional clause format? (circle one) A. else: B. if condition: C. elif condition: D. else condition:

Back

else condition:

Answer explanation

Every clause contains a keyword and a colon. Most clauses also contain a condition, except for `else`, which does not have its own condition.

Front

Which of the following is NOT true about conditions?
They are boolean expressions,
They always produce the value True or False,
You can only have one condition per conditional,
They come between the keyword and colon in a conditional clause

Back

You can only have one condition per conditional

Answer explanation

Explanation: The condition is the part of the if-statement or other conditional clause that asks a yes-or-no question. For a conditional with multiple clauses, each clause will have its own condition, except for `else`.

Front

What value is in the variable `y` after this code runs?

Back

100

Answer explanation

Explanation: A nested conditional is only tested if the outer conditional is True. In this case, x is less than y, so the first condition is True. Then we check the inner conditional. x is NOT less than 0, so we skip the block of the inner conditional, and the final value of y is 100.

Front

What symbol is used in Python to divide with no remainder? (floor division operator)

Back

//

Answer explanation

Explanation: The Python floor division operator, //, divides two numbers and gets rid of the remainder, leaving an integer.

Front

What is the chance you will see bigfoot? Give your answer as a fraction.

Back

1/100

Answer explanation

Explanation: The Weighted Choice technique works by picking more numbers than you have choices. Then several numbers will result in the same outcome, making that outcome more likely.

Front

How do you put an if-statement inside another if-statement (nesting)?

Back

Indent the second conditional underneath the first one.

Answer explanation

Explanation: You can tell the nesting level of a statement based on its indentation. Each new level of indentation means the code is "inside" of the unindented line above it.

Front

The % symbol or modulo operator is used to:

Back

Get the remainder after division

Answer explanation

Explanation: The modulo operator, or %, gets the remainder after division. It can be used to check if something is evenly divisble by a given number, among other uses.