Important Chapter wise Quiz Informatics Practices Class 12

Nadiya wants to delete row number 4 and 6  from dataframe DF. Select an appropriate option for her.

Kish wants to delete a column labeled 'C1' from dataframe DF. Which of the following command can be used to delete a column?

Consider the following code:

import pandas as pd
d={'A':[10,20],'B':[30,40],'C':[50,60]}
df=pd.DataFrame(d)
df[:]=100

Select an appropriate option for what this code will do.

Which of the following is not an option to add a new row into a Dataframe DF?

Isha wants to create a dataframe from the below given lists:

l1=['Aman',56]

l2=['Chaman',67]

Help him to create a dataframe using which one of the following functions?

Bablu is trying to access a column from dataframe. But the column does not exist in the dataframe. Which of the following error will be returned?

Sumona wants to remove a row with the label 'R1' from dataframe DF. Select the correct option from the following:

To access each row of dataframe individually, which of the following function is used?

Which of the following statement is not correct for the pandas dataframe?

Dataframe is ________ data structure of Python Pandas.

Adnan wants to display the total number of elements present in the DataFrame. Which of the following attribute is used to accomplish his task?

Laksh wants to display row labels of DataFrame df. Suggest to him an option from the following.

Which of the following statement is correct for iloc?

Hemang wants to create an empty dataframe. Select appropriate option for him:

Which of the following is not a correct way to create a dataframe?

Kaushal wants to display the first n number of rows from a dataframe DF. Which of the following statement is correct?

Shiv has created a dataframe with 6 rows. Now he wants to display alternate rows from dataframe. Which of the following is the correct statement for him?

Dataframe is intersection of ________ and ___________

Krish has to select an option to create a dataframe. So he needs to import required module for the same. Which of the following is a correct statement?

Manisha is a student of class XII. She is learning about the attributes of DataFrame. Help her to memorize the concepts and find which of the following is not a dataframe attribute from following.

1. Which chart is useful to plot the data that shows the comparison?

2. In the following statement pyplot is considered as:

import matplotlub.pyplot

3. Which of the following is not a valid letter for color?

4. Jaimit is trying to import matplotlib into his program. Help him by select an appropriate option:

5. Krish wants to save the figure generated by the plot function. Suggest to him an appropriate function to accomplish his task from the following:

6. To apply marker as filled X wich of the following symbol is used?

7. Which of the following parameter of the plot() method accepts a string indicating the type of plot?

8. A _______ is any symbol that represents a data value in a line chart or a scatter plot.

9. Shiv wants to create a bar chart for month-wise sales reports. Which of the following function help him to his job?

10. Which of the following letter is used to apply marker as plus (filled)?

11. The figure parameter in plot function indicates

12. Which of the following is not a valid line style?

13. Consider the following statement:

import matplotlib.pyplot as plt

Here plt is considered as

14. Kaushikee wants to create a figure using pyplot. Suggest her the function which is used to create pyplot.

15. A ____________ plot is used to visualize growth or decline in data over a time interval.

16. While plotting data from dataframe the index will be automatically placed at ________ on the chart.

17. Laksh wants to show grid lines for the chart. Which of the following is the correct syntax to complete his task?

18. To plot data on a histogram, the data is sorted into ___________

19. The purpose of plotting data is

20. A _________ is the overall window where the outputs of pyplot functions are plotted.

21. The default width of the line is _____ pixels.

22. Which of the following python library helps to plot data on chart?

23. Which of the following letter is used to apply black color to chart lines or bars?

24. Which of the following is not a part of plot figure?

25. Krishn is working on a chart. He wants to display chart with the names and colors of each series of data. Help him by selecting a function to fulfill his needs.

26. Which of the following is an example of visualization in our routine life?

27. A bar chart contains

28. Which of the following is not a valid marker symbol?

29. ________ are column-charts, where each column represents a range of values, and the height of a column corresponds to how many values are in that range.

30. The values marked on the horizontal axis are called ____________

1. Which function is used to extract a word starting from a specific position to a number of characters from the string in SQL?

i) mid()

ii) sub()

iii) substr()

2. Which of the following is string function?

3. Shiv wants to extract the first 3 letters from "TutorialAICSIP". Select the appropriate query for the same.

i) select left('TutorialAICSIP',3)

ii) select mid('TutorialAICSIP',1,3)

iii) select sub('TutorialAICSIP',1,3)

iv) select first('TutorialAICSIP',3)

4. What will be the output of the following query?

select power(2,-2);

5. What will be the output of the following query?

select mid('informatics practices',3,3);

6. Krishn is working on a table that contains a column with short forms in lower letters. Now he is asked to display them into capital letters. Which of the function(s) help him?

i) upper()

ii) ucase()

iii) capital()

iv caps()

7. ____________ is used to perform some particular task and it returns zero or more values as a result.

8. Adnan wants to compute the cube of the specific column from the table. Which function he can use?

9. What is the output of the given query?

select instr('Informatics Practices','Com')

10. Which function is used to remove the extra spaces from the string from the beginning and end?

11. Krish has a salary column in emp. This salary is given as a monthly salary. Now he has computed daily salary and wants to display leftover value. Suggest to him a suitable function to perform this task.

12. Single-row functions are also known as ______________ functions.

13. Which of the following function is a date function?

14. Which SQL function returns n number of characters from the beginning of the string?

15. What will be the output of the following query?

select instr('Informatics Practices','for')

16. What will be the output of the given query:

select trim(5 from 55255255);

17. Predict the output for given query:

select round(25.60,-1);

18. Which of the following is a scalar function?

19. Shiv is working on a table of a team India which contains records of the T20 World cup. He computed the net run rate but it is coming to 5.98776544. Now his teacher asked him to display the result with two decimal places only. Suggest to him a suitable function for the same.

20. What will be the output of following query?

select round(5.54785,1);

21. What will be the output of:

select lower('IP')

22. Which of the following is not a category of functions in MySQL?

23. Which of the following functions are applied on a single value and return a single value?

24. Select a function that returns a number of characters of the specified string.

25. What will be the output of the following:

select pow(insrt('TutorialAICSIP','t'),2)

26. Which function returns n number of characters from the end of the string?

27. Which of the following numeric/math function?

28. What will be the output of following query?

select power(5,0)

29. Select the output for the following:

select left('Informatics Practices',4)

30. Laksh has written these queries:

i) select mod(56,3);

ii) select mod(2,5);

iii) select mod(5,0)

What are the correct outputs:

31. what will be the output of the following query?

select round(25.56,0);