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Codes consisting offer light dark marks of various thickness which may be optically read is known as :

AOperand

BBar code

CDecoder

DOp code

Answer:

B. Bar code


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ഓപ്പറേറ്റിംഗ് സിസ്റ്റത്തിന്റെ സേവനങ്ങൾ, ആക്സസ് ചെയ്യുന്നതിനുള്ള ഇന്റർഫേസ് നൽകുന്നത്: