Page 418 - Computer Science V2.0 Class 11

[3, 5, 5, 2, 8, 9, 7, 21, 6, 5, 4]
the program should display the list:
[27, 5, 5, 8, 8, 9, 343, 21, 6, 125, 4]
You should not create a new list, but rather modify the existing list.
11. Write a function that takes a list as an input argument (say, key) and search for key in the list. If the key is found
in the list the function should return the index of the first occurrence in the list, otherwise the function should return
None.
12. Write a function marksUpdate that accepts a list of lists RollNoMarksList (where each inner list comprises a pair
of roll number and marks of students) and the RollNo and returns the updated list with the marks increased by 5
corresponding to RollNo. Write a program that accepts pairs of roll number and marks of some students as lists and uses
the function RollNoMarksUpdateto increase the marks by 5. Finally, display the updated list.
13. Write a function minorModeration() that accepts a list of lists NameMarksList (where each inner list comprises a
pair of roll number and marks of students) and returns the updated list with the marks appropriately increased so that the
students who just miss the marks by not more than three marks are awarded pass marks. Generalise your function so that
the margin is flexible and not necessarily fixed as three marks. You may like to use a default parameter for this purpose. Write
a program that accepts pairs of names and marks of some students as lists and uses the function minorModeration
to increase the marks, if necessary.
14. Write a function moderation() that accepts a list of lists NameMarksList (where each inner list comprises a pair of
roll number and marks of students) and returns the updated list with the marks appropriately moderated according to the
following criteria:

Marks range Moderation

marks <40 6
40<=marks<50 5
50<=marks<60 4
60<=marks<70 3
70<=marks<80 2
80<=marks<90 1
90<=marks 0
Write a program that accepts pairs of names and marks of some students as lists and uses the function moderation()
to increase the marks, if necessary.

Assertion and Reasoning Based Questions

The following questions are assertion(A) and reasoning(R) based. Mark the correct choice as
a. Both A and R are true and R is the correct explanation of A
b. Both A and R are true and R is not the correct explanation of A
c. A is true but R is false
d. A is false but R is true

1. Assertion(A): Elements of a list can be accessed using indices.
Reasoning (R): The list is a sequence data type, and the elements of a sequence data type can be accessed using
indices.
2. Assertion(A): In the case of linear search, the search key is sequentially compared with the elements of the list.
Reasoning (R): Linear search is only applicable to lists, not to tuples.
3. Assertion(A): The function call sorted(lst) yields a list sorted in ascending order.
Reasoning(R): The list is a mutable data type.

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