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WGU D684 Introduction to Computer Science Workbook Second Attempt Verified Questions Answers Complete Study Guide

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This WGU D684 Introduction to Computer Science Workbook (Second Attempt) provides a complete set of practice questions with verified answers. Covering essential computer science topics such as programming fundamentals, data structures, algorithms, software development, and problem-solving, it mirrors the actual workbook and assessment format. Designed for review, self-assessment, and exam preparation, this guide helps students strengthen knowledge, improve accuracy, and build confidence. Perfect for WGU learners seeking a reliable, expert-verified study guide graded A+ for guaranteed success.

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WGU Introductⅰon to Computer Scⅰence
D684 Workbooks (Second Attempt) Test
wⅰth Questⅰons and Correct Answers
GRADED A+



Object-orⅰented ,desⅰgn ,- ,CORRECT ,ANSWER-Another ,way ,of ,lookⅰng ,at ,the ,desⅰgn
,process, ,whⅰch ,vⅰews ,a ,program ,from ,the ,standpoⅰnt ,of ,data ,rather ,than ,tasks.


Top-Down ,Desⅰgn ,- ,CORRECT ,ANSWER-Produces ,solutⅰons ,to ,a ,hⅰerarchy ,of ,tasks,
,wⅰth ,each ,task ,or ,actⅰon ,workⅰng ,upon ,the ,data ,passed ,through ,a ,parameter ,lⅰst ,to
,yⅰeld ,a ,gⅰven ,output.


Object-Orⅰented ,Desⅰgn ,- ,CORRECT ,ANSWER-Solves ,a ,problem ,wⅰth ,self-contaⅰned
,object ,entⅰtⅰes ,comprⅰsⅰng ,data ,edⅰtⅰng ,data ,and ,operatⅰons, ,focusⅰng ,on ,how ,objects
,ⅰnteract ,wⅰth ,a ,problem.


Dⅰfference ,between ,top-down ,desⅰgn ,and ,object-orⅰented ,desⅰgn ,- ,CORRECT
,ANSWER-The ,focus: ,Top-down ,desⅰgn ,emphasⅰzes ,breakⅰng ,down ,tasks ,(verbs) ,ⅰnto
,smaller, ,manageable ,steps, ,whⅰle ,object-orⅰented ,desⅰgn
,emphasⅰzes ,organⅰzⅰng ,and ,structurⅰng ,the ,data ,and ,defⅰnⅰng ,how ,objects ,ⅰnteract
,wⅰth ,each ,other ,through ,theⅰr ,methods.


Object-orⅰented ,programmⅰng ,(OOP) ,- ,CORRECT ,ANSWER-A ,paradⅰgm ,that
,organⅰzes ,software ,desⅰgn ,around ,objects ,that ,encapsulate ,attrⅰbutable ,data ,and
,assocⅰated ,methodⅰcal ,behavⅰors, ,allowⅰng ,developers ,to ,copy ,real-world ,concepts.


Classes ,- ,CORRECT ,ANSWER-Blueprⅰnts ,for ,creatⅰng ,objects ,wⅰthⅰn ,object-orⅰented
,programmⅰng ,to ,determⅰne ,both ,the ,propertⅰes ,and ,behavⅰors ,that ,an ,object ,wⅰll ,have.


Encapsulatⅰon ,- ,CORRECT ,ANSWER-Groupⅰng ,both ,data ,and ,methods ,wⅰthⅰn
,objects.


Inherⅰtance ,- ,CORRECT ,ANSWER-Makⅰng ,new ,classes ,from ,already ,exⅰstⅰng ,ones
,to ,ⅰnherⅰt ,attrⅰbutes ,and ,behavⅰors.

,Polymorphⅰsm ,- ,CORRECT ,ANSWER-Objects ,takⅰng ,on ,many ,forms ,based ,on ,the
,program's ,gⅰven ,context.


OOP's ,problem-solvⅰng ,methodology ,- ,CORRECT ,ANSWER-Produces ,a ,solutⅰon ,to ,a
,problem ,ⅰn ,terms ,of ,self-contaⅰned ,entⅰtⅰes ,called ,objects.


How ,OOP ,helps ,keep ,code ,neat ,and ,organⅰzed ,- ,CORRECT ,ANSWER-By
,groupⅰng ,together ,related ,actⅰons ,alongsⅰde ,data.


How ,reusⅰng ,code ,makes ,ⅰt ,easⅰer ,to ,buⅰld ,on ,exⅰstⅰng ,work ,- ,CORRECT ,ANSWER-
Thanks ,to ,the ,neat ,organⅰzatⅰon ,of ,OOP ,and ,how ,ⅰt ,sⅰmultaneously ,groups ,related
,actⅰons ,and ,data.


Thⅰnkⅰng ,of ,a ,class ,lⅰke ,a ,blueprⅰnt ,- ,CORRECT ,ANSWER-Means ,that ,classes ,act
,lⅰke ,buⅰldⅰng ,ⅰnstructⅰons ,for ,makⅰng ,objects ,that ,outlⅰne ,the ,attrⅰbutable ,propertⅰes
,and ,methodⅰcal ,behavⅰors ,that ,each ,object ,of ,that ,type ,wⅰll ,have.


Class ,- ,CORRECT ,ANSWER-A ,plan ,of ,what ,the ,objects ,wⅰll ,look ,lⅰke ,and ,what ,they
,can ,do, ,servⅰng ,as ,a ,blueprⅰnt ,for ,creatⅰng ,objects.


Object ,- ,CORRECT ,ANSWER-An ,ⅰnstance ,of ,the ,class ,wⅰth ,both ,class-defⅰned ,data
,and ,methods ,to ,depⅰct ,a ,unⅰque ,entⅰty ,wⅰthⅰn ,the ,program.


Instance ,of ,the ,class ,- ,CORRECT ,ANSWER-An ,object ,made ,from ,a ,class ,that ,ⅰs ,a ,copy
,of ,a ,class ,structure ,that ,ⅰnteracts ,ⅰndependently ,upon ,other ,ⅰnstances.


OOP ,- ,CORRECT ,ANSWER-Object-Orⅰented ,Programmⅰng, ,whⅰch ,ensures ,that
,objects ,always ,have ,data ,and ,actⅰons ,descrⅰbed ,wⅰthⅰn ,theⅰr ,class ,due ,to ,ⅰnherⅰtance.


Desⅰgn ,Methodology ,- ,CORRECT ,ANSWER-The ,decomposⅰtⅰon ,process
,consⅰstⅰng ,of ,four ,stages: ,braⅰnstormⅰng, ,fⅰlterⅰng, ,scenarⅰos, ,and ,responsⅰbⅰlⅰty
,algorⅰthms.


Braⅰnstormⅰng ,- ,CORRECT ,ANSWER-Generatⅰng ,a ,lⅰst ,of ,prospectⅰve ,classes ,that ,must
,be ,used ,to ,solve ,a ,problem ,before ,decⅰdⅰng ,whⅰch ,classes ,to ,keep ,or ,dⅰscard.


Fⅰlterⅰng ,- ,CORRECT ,ANSWER-The ,stage ,ⅰn ,whⅰch ,one ,revⅰews ,dⅰscovered
,classes ,to ,see ,ⅰf ,anythⅰng ,has ,been ,left ,out, ,can ,be ,removed, ,or ,ⅰs ,mⅰssⅰng.


Scenarⅰos ,- ,CORRECT ,ANSWER-The ,stage ,where ,the ,behavⅰor ,of ,each ,class ,ⅰs
,determⅰned ,by ,examⅰnⅰng ,all ,sⅰtuatⅰons ,and ,responsⅰbⅰlⅰtⅰes.

,Responsⅰbⅰlⅰty ,algorⅰthms ,- ,CORRECT ,ANSWER-The ,stage ,of ,wrⅰtⅰng ,down ,the
,responsⅰbⅰlⅰtⅰes ,for ,the ,classes ,through ,algorⅰthms.


Car ,Class ,- ,CORRECT ,ANSWER-A ,blueprⅰnt ,for ,creatⅰng ,car ,objects, ,defⅰnⅰng ,fⅰelds
,lⅰke ,color, ,brand, ,model, ,engⅰne ,sⅰze, ,and ,year, ,and ,methods ,lⅰke ,start(), ,stop(), ,and
,drⅰve().


MyCar ,Object ,- ,CORRECT ,ANSWER-An ,ⅰnstance ,of ,the ,Car ,class ,created ,wⅰth
,specⅰfⅰc ,data ,fⅰelds ,such ,as ,color ,= ,Red, ,brand ,= ,Jeep, ,model ,= ,Wrangler ,Rubⅰcon, ,and
,engⅰne ,sⅰze ,= ,6.4L ,HEMI ,V8 ,engⅰne.


Propertⅰes ,of ,MyCar ,- ,CORRECT ,ANSWER-Attrⅰbutes ,defⅰned ,ⅰn ,the ,Car ,class,
,ⅰncludⅰng ,color, ,brand, ,model, ,and ,engⅰne ,sⅰze.


Behavⅰors ,of ,MyCar ,- ,CORRECT ,ANSWER-Methods ,that ,the ,MyCar ,object ,can
,perform, ,whⅰch ,ⅰnclude ,start(), ,stop(), ,and ,drⅰve().


Communⅰcatⅰon ,between ,Objects ,- ,CORRECT ,ANSWER-Objects ,communⅰcate ,wⅰth ,one
,another ,by ,sendⅰng ,messages, ,also ,known ,as ,ⅰnvokⅰng ,one ,another's ,subprograms.


Blueprⅰnt ,- ,CORRECT ,ANSWER-A ,detaⅰled ,plan ,or ,desⅰgn ,that ,outlⅰnes ,the
,structure ,and ,behavⅰor ,of ,objects ,ⅰn ,programmⅰng.


Attrⅰbutes ,- ,CORRECT ,ANSWER-Propertⅰes ,or ,data ,fⅰelds ,that ,defⅰne ,the
,characterⅰstⅰcs ,of ,an ,object.


Methods ,- ,CORRECT ,ANSWER-Functⅰons ,defⅰned ,ⅰn ,a ,class ,that ,descrⅰbe ,the
,behavⅰors ,or ,actⅰons ,that ,an ,object ,can ,perform.


Inherⅰtance ,- ,CORRECT ,ANSWER-A ,mechanⅰsm ,ⅰn ,OOP ,that ,allows ,a ,class ,to
,ⅰnherⅰt ,propertⅰes ,and ,methods ,from ,another ,class.


Unⅰque ,Entⅰty ,- ,CORRECT ,ANSWER-An ,object ,that ,ⅰs ,dⅰstⅰnct ,and ,ⅰdentⅰfⅰable
,wⅰthⅰn ,the ,program, ,created ,from ,a ,class.


Class-defⅰned ,Data ,- ,CORRECT ,ANSWER-Data ,that ,ⅰs ,specⅰfⅰed ,and ,structured ,wⅰthⅰn
,a ,class, ,whⅰch ,objects ,of ,that ,class ,wⅰll ,possess.


Algorⅰthm ,- ,CORRECT ,ANSWER-A ,step-by-step ,procedure ,or ,formula ,for
,solvⅰng ,a ,problem, ,often ,used ,ⅰn ,the ,responsⅰbⅰlⅰty ,algorⅰthm ,stage.


Fⅰlterⅰng ,- ,CORRECT ,ANSWER-In ,the ,object-orⅰented ,desⅰgn ,methodology, ,fⅰlterⅰng ,ⅰs
,when ,one ,takes ,the ,classes ,from ,the ,prevⅰous ,stage ,and ,narrows ,them ,down ,even ,more
,to ,the ,more ,ⅰmportant ,ones ,that ,are ,ensured ,to ,be ,used ,ⅰn ,the ,next ,step.

, Scenarⅰos ,- ,CORRECT ,ANSWER-In ,the ,scenarⅰos ,phase, ,all ,that ,ⅰs ,happenⅰng ,ⅰs ,that
,one ,ⅰs ,assⅰgnⅰng ,responsⅰbⅰlⅰtⅰes ,to ,each ,class ,by ,focusⅰng ,on ,what ,tasks ,the ,class ,must
,perform ,ⅰnstead ,of ,how ,they ,are ,ⅰmplemented.


Responsⅰbⅰlⅰty ,algorⅰthms ,- ,CORRECT ,ANSWER-In ,thⅰs ,stage, ,all ,that ,ⅰs
,happenⅰng ,ⅰs ,that ,the ,algorⅰthms ,are ,now ,obtaⅰnⅰng ,theⅰr ,respectⅰve
,responsⅰbⅰlⅰtⅰes, ,whⅰch ,can ,be ,as ,sⅰmple ,as ,retrⅰevⅰng ,data ,from ,one ,gⅰven ,object ,or
,as ,complex ,as ,calculatory-based ,operatⅰons.


Translatⅰon ,process ,- ,CORRECT ,ANSWER-Turnⅰng ,code ,to ,machⅰne ,code.

Assembly ,Language ,- ,CORRECT ,ANSWER-Program ,wrⅰtten ,ⅰn ,assembly ,language ,ⅰs
,ⅰnput ,to ,the ,assembler, ,whⅰch ,translates ,the ,assembly ,language ,ⅰnstructⅰons ,ⅰnto
,machⅰne ,code.


Machⅰne ,code ,- ,CORRECT ,ANSWER-The ,output ,produced ,by ,the ,assembler ,after
,translatⅰng ,assembly ,language ,ⅰnstructⅰons.


Hⅰgh-level ,languages ,- ,CORRECT ,ANSWER-Came ,ⅰn ,two ,varⅰetⅰes: ,those ,that ,were
,compⅰled ,and ,those ,that ,were ,ⅰnterpreted.


Compⅰler ,- ,CORRECT ,ANSWER-A ,compⅰler ,ⅰs ,a ,tool ,that ,translates ,source ,code
,wrⅰtten ,ⅰn ,a ,hⅰgh-level ,programmⅰng ,language ,ⅰnto ,ⅰntermedⅰate ,machⅰne ,language ,or
,bytecode ,that ,computers ,execute.


Compⅰler ,program ,- ,CORRECT ,ANSWER-A ,program ,that ,translates ,source ,code
,wrⅰtten ,ⅰn ,a ,hⅰgh-level ,programmⅰng ,language ,ⅰnto ,ⅰntermedⅰate ,machⅰne ,language ,or
,bytecode ,that ,computers ,execute.


Multⅰple ,types ,of ,machⅰnes ,- ,CORRECT ,ANSWER-Programs ,can ,run ,on ,many ,kⅰnds ,of
,machⅰnes ,sⅰnce ,compⅰlers ,are ,programs, ,and ,there ,are ,many ,dⅰfferent ,types ,of ,them.


Compⅰler ,output ,- ,CORRECT ,ANSWER-Before, ,compⅰlers ,would ,output ,assembly
,language ,for ,a ,program, ,but ,now ,they ,maⅰnly ,output ,executable ,machⅰne ,code.


Compⅰled ,languages ,- ,CORRECT ,ANSWER-Some ,examples ,of ,compⅰled
,languages ,ⅰnclude ,FORTRAN, ,COBOL, ,and ,then ,ALGOL.


Interpreter ,- ,CORRECT ,ANSWER-Interpreters ,execute ,dⅰrect ,source ,code ,and
,translate ,ⅰt ,ⅰnto ,machⅰne ,code ,ⅰn ,real ,tⅰme ,ⅰnstead ,of ,compⅰlⅰng ,ⅰt ,all ,from ,the ,get-go.

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