INFORMATICS PRACTICES

TexTbook for Class xI

Prelims.indd 1 09-Aug-19 2:28:21 PM

First EditionAugust 2019 Shravana 1941

PD 50T BS

© National Council of Educational Research and Training, 2019

140.00

Printed on 80 GSM paper with NCERT watermark

Published at the Publication Division by the Secretary, National Council o f Educat ional Research and Training, Sri Aurobindo Marg, New Delhi 110016 and printed at Swan Press, 308 & 309, Sector-7 Manesar, Gurugram - 122050, Haryana.

ISBN 978-93-5292-148-5

Publication Team

Head, Publication : M. Siraj AnwarDivision

Chief Editor : Shveta Uppal

Chief Business Manager : Bibash Kumar Das

Chief Production Officer : Arun Chitkara

Editor : Bijnan Sutar

Production Assistant : Mukesh Gaur

Cover Design and LayoutMeetu Sharma (Contractul)

ALL RIGHTS RESERVED No part of this publication may be reproduced, stored in a

retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior permission of the publisher.

This book is sold subject to the condition that it shall not, by way of trade, be lent, re-sold, hired out or otherwise disposed of without the publisher’s consent, in any form of binding or cover other than that in which it is published.

The correct price of this publication is the price printed on this page, Any revised price indicated by a rubber stamp or by a sticker or by any other means is incorrect and should be unacceptable.

OFFICES OF THE PUBLICATION DIVISION, NCERT

NCERT CampusSri Aurobindo MargNew Delhi 110 016 Phone : 011-26562708

108, 100 Feet Road Hosdakere Halli ExtensionBanashankari III StageBengaluru 560 085 Phone : 080-26725740

Navjivan Trust BuildingP.O.Navjivan Ahmedabad 380 014 Phone : 079-27541446

CWC CampusOpp. Dhankal Bus StopPanihatiKolkata 700 114 Phone : 033-25530454

CWC Complex Maligaon Guwahati 781 021 Phone : 0361-2674869

Prelims.indd 2 09-Aug-19 2:28:21 PM

Contents

Foreword iiiPreFace ivChapTer 1 CoMpuTer sysTeM 1

1.1 Introduction to Computer System 11.2 Evolution of Computer 31.3 Computer Memory 51.4 Software 9

ChapTer 2 eMergIng Trends 152.1 Introduction to Emerging Trends 152.2 Artificial Intelligence (AI) 162.3 Big Data 192.4 Internet of Things (IoT) 212.5 Cloud Computing 232.6 Grid Computing 252.7 Blockchains 26

ChapTer 3 brIef overvIew of pyThon 313.1 Introduction to Python 313.2 Python Keywords 343.3 Identifiers 343.4 Variables 343.5 Data Types 353.6 Operators 383.7 Expressions 413.8 Input and Output 423.9 Debugging 433.10 Functions 443.11 if..else Statements 463.12 for Loop 483.13 Nested Loops 50

ChapTer 4 workIng wITh lIsTs and dICTIonarIes 554.1 Introduction to List 554.2 List Operations 574.3 Traversing a List 594.4 List Methods and Built-in Functions 60

Prelims.indd 9 09-Aug-19 2:28:22 PM

x

4.5 List Manipulation 624.6 Introduction to Dictionaries 674.7 Traversing a Dictionary 694.8 Dictionary Methods and Built-in Functions 694.9 Manipulating Dictionaries 71

ChapTer 5 undersTandIng daTa 815.1 Introduction to Data 815.2 Data Collection 855.3 Data Storage 865.4 Data Processing 875.5 Statistical Techniques for Data Processing 88

ChapTer 6 InTroduCTIon To nuMpy 956.1 Introduction 956.2 Array 966.3 NumPy Array 966.4 Indexing and Slicing 1006.5 Operations on Arrays 1026.6 Concatenating Arrays 1046.7 Reshaping Arrays 1056.8 Splitting Arrays 1066.9 Statistical Operations on Arrays 1076.10 Loading Arrays from Files 1096.11 Saving NumPy Arrays in Files on Disk 112

ChapTer 7 daTabase ConCepTs 1237.1 Introduction 1237.2 File System 1247.3 Database Management System 1277.4 Relational Data Model 1327.5 Keys in a Relational Database 136

ChapTer 8 InTroduCTIon To sTruCTured Query language (sQl) 1438.1 Introduction 1438.2 Structured Query Language (SQL) 1448.3 Data Types and Constraints in MySQL 1458.4 SQL for Data Definition 1468.5 SQL for Data Manipulation 1538.6 SQL for Data Query 156 8.7 Data Updation and Deletion 166

Prelims.indd 10 09-Aug-19 2:28:22 PM