getting-started-with-for/questions.rst
author anand
Thu, 11 Nov 2010 00:03:57 +0530
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permissions -rw-r--r--
Checklist OK for `The other kinds of plots`
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Objective Questions
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-------------------
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.. A mininum of 8 questions here (along with answers)
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1. In Python a block is represented by
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   a. Curly braces
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   #. Begin and End keywords
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   #. Indentation
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   #. Curly braces + Indentation
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   #. All of the above
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Answer: Indentation
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2. Indentation is not mandatory in Python
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   a. True
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   #. False
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Answer: False
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3. A ``for`` loop in Python,
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   a. is a simple iterator
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   #. is a condition based loop
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   #. can iterate only over integer list of elements
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   #. All of the above
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Answer: is a simple iterator
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4. ``range()`` function can generate negative numbers
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   a. True
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   #. False
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Answer: True
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5. ``range(a,b)`` function returns,
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   a. A tuple of elements from a to b including a and b
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   #. A tuple of elements from a to b excluding b
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   #. A list of elements from a to b including a and b
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   #. A list of elements from a to b excluding b
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Answer: A list of elements from a to b excluding b
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6. ``linspace(1,100,2)`` and ``range(1,100,2)`` produces the same output,
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   a. True
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   #. False
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Answer: False
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7. What is the output of the below code snippet?
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   ::
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     y = 1
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     for x in range(21):
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         y*=x
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     print y
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   a. Product of natural numbers up to 20(including)
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   #. Product of natural numbers up to 21(including)
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   #. Zero
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   #. Error
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Answer: Zero
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8. What is the output of the below code snippet?
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   ::
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    y = 1
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    for x in range(1,21):
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        y*=x
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    print y
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   a. Product of natural numbers up to 20(including)
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   #. Product of natural numbers up to 21(including)
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   #. Zero
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   #. Error
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Answer: Product of natural numbers up to 20(including)
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9. What is the output of the below code snippet?
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   ::
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    y = 1
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    for x in range(1,21)
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        y*=x
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    print y
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   a. Product of natural numbers up to 20(including)
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   #. Product of natural numbers up to 21(including)
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   #. Zero
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   #. Error
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Answer: Error
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Larger Questions
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----------------
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.. A minimum of 2 questions here (along with answers)
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1. Write a python script to calculate the sum of the first 1000
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    natural numbers?
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2. Write a python script to find out prime numbers up to 500.
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    [`hint`: a number ``A`` which is divisible by only ``1`` and ``A``
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    is a prime number.]
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3. Write a python script to find out the difference between the
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    square of sum of first 100 natural numbers and sum of squares of
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    first 100 natural numbers.
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