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# CBSE Class 12 Pre Board 2020 : Informatics Practices (Kendriya Vidyalaya (KV) Agra)

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SET-H KENDRIYA VIDYALAYA SANGATHAN, AGRA REGION INFORMATICS PRACTICES - NEW (065) Pre-Board Examination- 2019-20 Max Marks: 70 Time: 3 hrs. General Instructions: All questions are compulsory. Question Paper is divided into 4 sections A, B, C and D. Section A comprises of questions from Data Hadling-2. Section B comprises of questions from Basic Engineering. Section C comprises of questions from Data Management-2 Section D comprises of questions from Society, Law and Ethics-2. Section A Answer the following questions: 1 a) The ________ function returns its argument with a modified shape, whereas the _______method modifies the array itself. i) Reshape, resize ii) Resize, reshape iii) Reshape2, resize iv) All of the mentioned b) What will be the output of following python script: 1 1 import numpy as np k= np.arange(20,50,3) q=k.reshape(5,2) c) print(q) Revathi is trying to draw a line chart for some sales figure of different product. She 1 wants to plot different type of lines such as solid, dashed, dotted etc. for lines of different product. Suggest her what argument should she use with the plot () function. d) Write a python program to extract all odd numbers from an array. 2 Input array: [0,1,2,3,4,5,6,7,8,9] and desired output: array([1,3,5,7,9]) e) Consider following commands >>> ary = np.arange (10) **3 >>> ary array ([0,1,8,27,64,125,216,343,512,729]) Write code to extract elements in reverse order from array. The extracted elements should skip two elements. (Output of code will be - ([729,216,27,0]) Page 1 of 6 2

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