dopp_test_sample_questions.ipynb

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   "source": [
    "### The DOPP Python test will be an in-person paper-based test. Below are some sample test questions from each topic."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Built-in types\n",
    "\n",
    "## 1. What is the return value of the last expression of the following cells?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "i = 3\n",
    "i ** 3, i % 2, abs(i - 5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "l = list(range(0, 20, 2))\n",
    "l[-5:-2]"
   ]
  },
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   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "t = tuple([3, 2, 1, 1])\n",
    "t[1] += 1"
   ]
  },
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 2. Turn string A into string B using string formatting methods alone? Do not try to change the individual letters of the string and do not take substrings.\n",
    "\n",
    "| input | output |\n",
    "| ---- | ---- |\n",
    "|`\"ABC\"` | `\"abc\"` |\n",
    "|`\"ABC \\n\"` | `\"abc\"` |\n",
    "|`\"word1_word2_word3\"` | `\"word1 word2 word3\"` |"
   ]
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  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 3. Write a function that takes three parameters with default values. Demonstrate that it can be called with zero, one, two or three parameters."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# OOP"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 1. How do you define a class in Python? Write an example that can be initialized with 2 parameters!"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 2. Consider the following code snippet. What will the output be?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "class A:\n",
    "    def method(self):\n",
    "        print(\"A\")\n",
    "    \n",
    "class B:\n",
    "    def method(self):\n",
    "        print(\"B\")\n",
    "\n",
    "b = B()\n",
    "b.method()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "a = 12\n",
    "b = 13\n",
    "assert a == b, \"a and b are not the same\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 3. How can we prevent a code from raising an error? The following function will raise a ZeroDivisionException. Wrap it so, that it will only print out `Error` instead of raising one."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def problem():\n",
    "    return 1 / 0"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# List comprehension, context managers and functional programming"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 1. Transform the following code into a list comprehension!"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "l = []\n",
    "for i in range(10):\n",
    "    l.append(i * 3)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 2. What will be the output of the following code snippet?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def func(i: int) -> int:\n",
    "    return i * 2\n",
    "\n",
    "l = [1, 2, 3, 4, 5]\n",
    "print(list(map(func, l)))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 3. What elements will the following list contain?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "l = [i for i in range(10) if i % 2 == 0]"
   ]
  }
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