Class 12 CS Chapter 1 Python Revision Tour Solutions Sumita Arora New Syllabus

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Back Exercise Part A

1. What are tokens in Python ? How many types of tokens are allowed in Python ? Exemplify your answer.
2. How are keywords different from identifiers ?
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3. What are literals in Python ? How many types of literals are allowed in Python ?
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4. Can nongraphic characters be used and processed in Python ? How ? Give examples to support your answer.
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5. Out of the following, find those identifiers, which cannot be used for naming Variables or Functions in a Python program :
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6. How are floating constants represented in Python ? Give examples to support your answer.
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7. How are string-literals represented and implemented in Python ?
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8. What are operators ? What is their function ? Give examples of some unary and binary operators.
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9. What is an expression and a statement ?
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10. What all components can a Python program contain ?
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11. What are variables ? How are they important for a program ?
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12. Describe the concepts of block or suite and body. What is indentation and how is it related to block and body ?
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13. What are data types ? How are they important ?
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14. How many integer types are supported by Python ? Name them.
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15. What are immutable and mutable types ? List immutable and mutable types of Python.
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16. What is the difference between implicit type conversion and explicit type conversion ?
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18. What is entry controlled loop ? Which loop is entry controlled loop in Python ?
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19. Explain the use of the pass statement. Illustrate it with an example.
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20. Below are seven segments of code, each with a part coloured. Indicate the data type of each coloured part by choosing the correct type of data from the following type.
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Back Exercise Part B

Back Exercise Part C

1. Write a program to print one of the words negative, zero, or positive, according to whether variable x is less than zero, zero, or greater than zero, respectively.
2. Write a program that returns True if the input number is an even number, False otherwise.
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3. Write a Python program that calculates and prints the number of seconds in a year.
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4. Write a Python program that accepts two integers from the user and prints a message saying if first number is divisible by second number or if it is not.
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5. Write a program that asks the user the day number in a year in the range 2 to 365 and asks the first day of the year – Sunday or Monday or Tuesday etp. Then the program should display the day on the day-number that has been input.
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6. One foot equals 12 inches. Write a function that accepts a length written in feet as an argument and returns this length written in inches. Write a second function that asks the user for a number of feet and returns this value. Write a third function that accepts a number of inches and displays this to the screen. Use these three functions to write a program that asks the user for a number of feet and tells them the corresponding number of inches.
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7. Write a program that reads an integer N from the keyboard computes and displays the sum of the numbers from N to (2 * N) if N is nonnegative. If N is a negative number, then it’s the sum of the numbers from (2 * N) to N. The starting and ending points are included in the sum.
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8. Write a program that reads a date as an integer in the format MMDDYYYY. The program will call a function that prints print out the date in the format , .
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9. Write a program that prints a table on two columns – table that helps converting miles into kilometres.
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10. Write another program printing a table with two columns that helps convert pounds in kilograms.
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11. Write a program that reads two times in military format (0900, 1730) and prints the number of hours and minutes between the two times.
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