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Working with Lists and Dictionaries — Chapter Summary

CBSE · Class 11 · Informatics Practices

Summary of Working with Lists and Dictionaries for CBSE Class 11 Informatics Practices. Part of the CBSE Class 11 Informatics Practices syllabus.

94 questions72 flashcards5 formulas & key relations5 concepts

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Overview

Lists are ordered, mutable sequence data types that can store mixed data types, including nested lists. Dictionary is a mapping data type that stores key-value pairs, where each key maps to a value. Lists and dictionaries are essential for storing, accessing, and organizing data in Python.

Key Concepts

A list is an ordered

A list is an ordered, mutable sequence data type. Its elements are written inside square brackets and separated by commas. A list can contain elements

List indexing starts at 0

List indexing starts at 0. Negative indices access elements from the end of the list, and list[-1] returns the last element. Accessing an out-of-range

Slicing uses list[start

Slicing uses list[start:stop:step], where start is inclusive, stop is exclusive, and step is the jump size. Slicing beyond the list length truncates t

Lists can be joined using +

Lists can be joined using +, repeated using *, and checked using in and not in. Concatenation does not change the original lists, and both operands mu

append() adds one element at

append() adds one element at the end, extend() adds each element of another list individually, insert() places an element at a given index, count() co

Learning Objectives

  • Understand the meaning and structure of lists
  • Use list indexing, slicing, and membership operations correctly
  • Apply list methods such as append, extend, insert, count, index, remove, pop, reverse, sort, sorted, min, max, and sum
  • Understand dictionary structure, keys, values, and items
  • Access and traverse dictionaries using keys and loop statements

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.

More resources for Working with Lists and Dictionaries

All CBSE Class 11 Informatics Practices Chapter Summary

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