Question

Q**Draw a State Transition Diagram for an Automatic Teller Machine (ATM). Your diagram should be able to deal with: Card inserted, reading card, enter PIN, waiting for PIN, Bank Checks PIN, Wait for Authorisation from Bank, Display Accounts, Select Account,

Display limits, Wait for Selection, Limit Exceeded, Print Receipt and Dispense Cash.

Q**Explain the concept of information hiding

Answer 1

Stale Taeition Bingisn f ATM Aus 9 nserct Main Card Enler Pin ai gor pin Plh 9nsesded Menu Take Card Caak Sesy Pin Cara ijected Consarchiun voufain Pront gncaroveds wait }ar Authaasahs ang Pin Reapt Cosored isplaging Selet Accourt Acounts wart far selcet acee ded Coflorard thisamplut limik timh Sitrenes Caif

In fermation Hiding 9i the procen of hiding gumction akiject the details ap am abetrachion whic educes the Hiding of thhese delail ueult im an gunchian esiier to uu olbject and makes the the extermal combplesiy 9mLlimeut to techriue pragammers En capudahien iageronatio briding Com mon Cars unit knaun as Hiding of data and gunchian mb a int meminyjut main clas Student int avay Student Studend an Student. calculak (Studentomarka Studenti.makıa, ludeut. morks int RL-No int marh, mah2, marks3) Enabrdati jnt caleulate (int masa int marla 2, int marbi3) dala and memker in absthactien (This is abtrachin ut calling farchn , den't knaw inde hew'to caleulale average) 1+mark2 + marha lar reurmavy