Class 12 CS Chapter 9 Data Structures – I Linear Lists Solutions Sumita Arora New Syllabus

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Ex 9.1 Solutions

Back Exercise Part A

17. Consider the following code and show how internally the memory is assigned to these
1. What are data structures ? Name some common data structures.
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2. Is data structure related to a data type ? Explain.
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3. What do you understand by linear and non-linear data structures ?
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4. Name some linear data structures. Is linked list a linear data structure ?
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5. What is the working principle of data structures stack and queues ?
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6. What is a linear list data structure ? Name some operations that you can perform on linear lists.
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7. Suggested situations where you can use these data structures: (i) linear lists , (ii) stacks, (iii) queues.
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8. What is a list comprehension ? How is it useful ?
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9. Enlist some advantages of list comprehensions.
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10. In which situations should you use list comprehensions and in which situations you should not use list comprehensions ?
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11. What is a nested list ? Give some examples.
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12. What is a two dimensional list ? How is it related to nested lists ?
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13. Suggest a situation where you can use a regular two dimensional list.
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14. What are ragged lists ? How are these different from two dimensional lists ?
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15. Suggest a situation where you can use ragged list ?
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16. How are lists internally stored ? How are 2D lists internally stored ?
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Back Exercise Part B

1. Create a list SqLst that stores the doubles of elements of another list NumLst. Following code is trying to achieve this. Will this code work as desired ? What will be stored in SqLst after following code ?
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2. Change the above code so that it works as stated in previous question.
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4. Consider a list ML = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]. Write code using a list comprehension that takes the list ML and makes a new list that has only the even elements of this list in it.
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5. Write equivalent list comprehension for the following code :
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6. Write equivalent for loop for the following list comprehension :
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7. Predict the output of following code if the input is :
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8. Predict the output :
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9. Predict the output :
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10. Predict the output :
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11. Predict the output :
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12. Predict the output.
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13. Find the Error. Consider the following code, which runs correctly at times but gives error at other times. Find the error and its reason.
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14. Suggest the correction for the error(s) in previous question’s code.
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15. Find the error. Consider the following code(s) and predict the error(s):
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16. Find the error in the following list comprehension :
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17. Suggest corrections for the errors in both the previous questions.
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Back Exercise Part C