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Puja Sharma from dav, auraiya
Subject :ICSO    Class : Class 8
what is punch code

Ans 1:

sparshgumasta from kvseoni, Seoni
Class : Class 8
Pdf files language used to generate such codes

Ans 2:

B G Karshana from Vidhya Niketan Public School, Coimbatore, Coimbatore
Class : Class 9
piece of stiff paper that can be used to contain digital information represented by the presence or absence of holes in predefined positions

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