Describe the plot produced by the following code

</description>

<time_limit>

30

</time_limit>

<code>

In []: x = linspace(0, 2*pi, 50)

In []: plot(x, cos(x), 'go')

</code>

<expected_answer>

Correct this question manually

</expected_answer>

</question>

<question>

<description>

What ipython magic command do you use to obtain the lines of code you have already typed in the interpreter? What command do you use to save them?

</description>

<time_limit>

30

</time_limit>

<expected_answer>

\%hist \%save

</expected_answer>

</question>

<question>

<description>

How do you set the x and y labels of a plot to "x" and "sin(x)" ?

</description>

<time_limit>

60

</time_limit>

<expected_answer>

xlabel \( \" x \" \) ylabel \( \"sin\(x\)\" \)

xlabel \( \" x \" \) ylabel \( \'sin\(x\)\' \)

xlabel \( \' x \' \) ylabel \( \"sin\(x\)\" \)

xlabel \( \' x \' \) ylabel \( \'sin\(x\)\' \)

</expected_answer>

</question>

<question>

<description>

How will you set the x and y axis limits so that the region of interest is in the rectangle (0, -1.5) and (2 pi, 1.5)?

xlim \( 0 , 2 \* pi \) [;,\n+] ylim \( -1\.5 , 1\.5 \)

</expected_answer>

</question>

<question>

<description>

How do you combine two lists a and b to produce one list?

</description>

<time_limit>

30

</time_limit>

<expected_answer>

a \+ b

</expected_answer>

</question>

<question>

<description>

If a = [1, 2, 5, 9] how do you add 10 to the end of this list ?

</description>

<time_limit>

30

</time_limit>

<expected_answer>

a\.append \( 10 \)

a = a \+ \[ 10 \]

a \+= \[ 10 \]

Write the code to read a file "data.txt" and print each line of it?

60

correct this manually

The following code snippet has an error/bug.

What is the error?

</description>

<code>

In []: l = [0.1, 0.2, 0.3, 0.4]

In []: t = [0.69, 0.90, 1.19, 1.30]

In []: tsq = []

In []: for time in t:

 ....:     tsq.append(time*time)

 ....:     plot(l, tsq)

</code>

<time_limit>

60

</time_limit>

<expected_answer>

plot

</expected_answer>

</question>

<question>

<description>

"Rossum, Guido, 42, 56, 34, 54" is a sample line from a Comma Separated Values (CSV) file

\.split \( " , " \)

\.split \( ' , ' \)

<question>

<description>

What is the output of the following code snippet

</description>

<code>

In [1]: d = {

	  'a': 1,

	  'b': 2

	  }

In [2]: print d['c']

</code>

<time_limit>

30

</time_limit>

<expected_answer>

error

Error

ERROR

</expected_answer>

</question>

<question>

<description>

Given the below dictionary, what command will you give to plot a pie-chart?

</description>

<code>

In []: sc = {'A': 10, 'B': 20, 

             'C': 70}

</code>

<time_limit>

60

</time_limit>

<expected_answer>

pie \( sc\.values \( \) \)

pie \( sc\.values \( \) , labels = sc\.keys \( \) \)

</expected_answer>

</question>

<question>

<description>

Given the below marks, how will you calculate the mean?

</description>

<code>

In []: marks = [10, 20, 30, 50, 55, 

                75, 83] 

</code>

<time_limit>

30

</time_limit>

<expected_answer>

mean \( marks \)

sum \( marks \) \/ len \( marks \)

</expected_answer>

</question>

<question>

<description>

How will you convert the list marks to an array?

</description>

<code>

In []: marks = [10, 20, 30, 50, 55, 75, 83]

</code>

<time_limit>

30

</time_limit>

<expected_answer>

array \( marks \)

</expected_answer>

</question>