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Working with Lists and Dictionaries — Revision Notes

CBSE · Class 11 · Informatics Practices

Working with Lists and Dictionaries revision notes for CBSE Class 11 Informatics Practices: 4 topics in quick points.

94 questions72 flashcards5 formulas & key relations5 concepts

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Key Topics to Revise

1

1. Lists: Basics, Indexing, and Properties

  • A list is an ordered, mutable sequence data type.
  • List elements are enclosed in square brackets and separated by commas.
  • A list can contain mixed data types such as integers, floats, strings, tuples, and even another list.
2

2. List Operations

  • Lists are joined using the + concatenation operator.
  • Concatenation does not change the original lists.
  • The + operator works only when both operands are lists; otherwise TypeError occurs.
3

3. List Methods and Built-in Functions

  • append() adds a single element at the end of the list.
  • If a list is passed to append(), it becomes one nested element.
  • extend() adds each element of the passed list individually.
4

4. Dictionary Basics and Traversal

  • A dictionary is a mapping data type.
  • A dictionary stores key-value pairs called items.
  • Each item has a key and a value separated by a colon.

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Full Notes

Key Concepts

A list is an orderedList indexing starts at 0Slicing uses list[startLists can be joined using +append() adds one element at

Frequently Asked Questions

What are the important topics in Working with Lists and Dictionaries for CBSE Class 11 Informatics Practices?
Key topics in Working with Lists and Dictionaries include Lists: Basics, Indexing, and Properties, List Operations, List Methods and Built-in Functions, Dictionary Basics and Traversal. Study these first, then practise questions on each for Class 11 exams.
How should I revise Working with Lists and Dictionaries for Class 11 exams?
Learn the core ideas first, then work through the 94 practice questions on Working with Lists and Dictionaries. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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