intro-to-python/08_mfr/06_review.ipynb

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   "source": [
    "# Chapter 8: Map, Filter, & Reduce (Review Questions)"
   ]
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   "source": [
    "The questions below assume that you have read the [first <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_nb.png\">](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/main/08_mfr/00_content.ipynb), [second <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_nb.png\">](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/main/08_mfr/01_content.ipynb), and [third <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_nb.png\">](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/main/08_mfr/04_content.ipynb) part in Chapter 8.\n",
    "\n",
    "Be concise in your answers! Most questions can be answered in *one* sentence."
   ]
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   "source": [
    "## Essay Questions "
   ]
  },
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   "source": [
    "**Q1**: With the [map() <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/functions.html#map) and [filter() <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/functions.html#filter) built-ins and the [reduce() <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/functools.html#functools.reduce) function from the [functools <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/functools.html) module in the [standard library <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/index.html), we can replace many tedious `for`-loops and `if` statements. What are some advantages of doing so?"
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   "source": [
    " < your answer >"
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   "source": [
    "**Q2**: Looking at the `lambda` expression inside [reduce() <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/functools.html#functools.reduce) below, what [built-in function <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/functions.html) is mimicked here?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "```python\n",
    "from functools import reduce\n",
    "\n",
    "numbers = [7, 11, 8, 5, 3, 12, 2, 6, 9, 10, 1, 4]\n",
    "\n",
    "reduce(lambda x, y: x if x > y else y, numbers)\n",
    "```"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " < your answer >"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q3**: What is the primary use case of **`list` comprehensions**? Why do we describe them as **eager**?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " < your answer >"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q4**: **`generator` expressions** may replace `list` objects and list comprehensions in many scenarios. When evaluated, they create a **lazy** `generator` object that does *not* **materialize** its elements right away. What do we mean by that? What does it mean for a `generator` object to be **exhausted**?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " < your answer >"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q5**: What does it mean for the **boolean reducers**, the built-in [all() <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/functions.html#all) and [any() <img height=\"12\" style=\"display: inline-block\" src=\"../static/link/to_py.png\">](https://docs.python.org/3/library/functions.html#any) functions, to follow the **short-circuiting** strategy?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " < your answer >"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q6**: What is an **iterator**? How does it relate to an **iterable**?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " < your answer >"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## True / False Questions"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Motivate your answer with *one short* sentence!"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q7**: `lambda` expressions are useful in the context of the **map-filter-reduce** paradigm, where we often do *not* re-use a `function` object more than once."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " < your answer >"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q8**: Using **`generator` expressions** in place of **`list` comprehensions** wherever possible is a good practice as it makes our programs use memory more efficiently."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " < your answer >"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q9**: Just as **`list` comprehensions** create `list` objects, **`tuple` comprehensions** create `tuple` objects."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " < your answer >"
   ]
  }
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