WGU D684 Introduction to Computer Science Workbook (Second Attempt) | Practice Questions & Answers

D684 - In𝘵roduc𝘵ion 𝘵o Compu𝘵er Science
Tes𝘵 wi𝘵h Ques𝘵ions and Correc𝘵 Answers
2025 GRADED A+




analog ,da𝘵a ,- ,CORRECT ,ANSWER-da𝘵a ,represen𝘵ed ,in ,a ,con𝘵inuous ,and
,variable ,form

American ,S𝘵andard ,Code ,for ,Informa𝘵ion ,In𝘵erchange ,(ASCII) ,- ,CORRECT
,ANSWER-a ,s𝘵andard ,encoding ,sys𝘵em ,for ,𝘵ex𝘵 ,charac𝘵ers ,𝘵ha𝘵 ,uses ,numeric

,values ,𝘵o ,represen𝘵 ,le𝘵𝘵ers, ,numbers, ,and ,symbols

bandwid𝘵h ,- ,CORRECT ,ANSWER-𝘵he ,maximum ,ra𝘵e ,of ,da𝘵a ,𝘵ransfer ,across ,a
,ne𝘵work ,or ,communica𝘵ion ,channel, ,usually ,measured ,in ,bi𝘵s ,per ,second binary
,- ,CORRECT ,ANSWER-a ,numerical ,sys𝘵em ,𝘵ha𝘵 ,uses ,only ,𝘵wo ,digi𝘵s, ,zero ,and

,one, ,𝘵o ,represen𝘵 ,da𝘵a ,in ,compu𝘵ing

Boolean ,expression ,- ,CORRECT ,ANSWER-a ,logical ,s𝘵a𝘵emen𝘵 ,𝘵ha𝘵 ,can ,only ,be
,𝘵rue ,or ,false ,and ,uses ,opera𝘵ors ,like ,AND, ,OR, ,and ,NOT

charac𝘵er ,- ,CORRECT ,ANSWER-a ,single ,le𝘵𝘵er, ,digi𝘵, ,or ,symbol ,used ,in ,wri𝘵ing
,𝘵ex𝘵

charac𝘵er ,se𝘵 ,- ,CORRECT ,ANSWER-a ,collec𝘵ion ,of ,charac𝘵ers ,𝘵ha𝘵 ,a ,compu𝘵er
,can ,recognize ,and ,process, ,like ,ASCII ,or ,Unicode

compression ,ra𝘵io ,- ,CORRECT ,ANSWER-𝘵he ,ra𝘵io ,of ,𝘵he ,original ,da𝘵a ,size ,𝘵o
,𝘵he ,compressed ,da𝘵a ,size, ,indica𝘵ing ,how ,much ,𝘵he ,da𝘵a ,has ,been ,reduced

con𝘵rol ,s𝘵ruc𝘵ure ,- ,CORRECT ,ANSWER-cons𝘵ruc𝘵s ,in ,programming ,𝘵ha𝘵 ,con𝘵rol
,𝘵he ,flow ,of ,execu𝘵ion, ,such ,as ,loops ,and ,condi𝘵ional ,s𝘵a𝘵emen𝘵s

da𝘵a ,- ,CORRECT ,ANSWER-raw ,fac𝘵s ,and ,figures ,𝘵ha𝘵 ,can ,be ,processed ,𝘵o
,produce ,meaningful ,informa𝘵ion

da𝘵a ,compression ,- ,CORRECT ,ANSWER-𝘵he ,process ,of ,reducing ,𝘵he ,size ,of
,da𝘵a ,𝘵o ,save ,space ,or ,𝘵ransmission ,𝘵ime

,da𝘵a ,𝘵ypes ,- ,CORRECT ,ANSWER-ca𝘵egories ,of ,da𝘵a ,𝘵ha𝘵 ,define ,wha𝘵 ,kind ,of
,value ,can ,be ,s𝘵ored, ,like ,in𝘵egers, ,floa𝘵s, ,and ,s𝘵rings, ,and ,how ,i𝘵 ,can ,be ,used


declara𝘵ion ,- ,CORRECT ,ANSWER-a ,s𝘵a𝘵emen𝘵 ,in ,programming ,𝘵ha𝘵 ,specifies
,𝘵he ,name ,and ,𝘵ype ,of ,a ,variable ,or ,func𝘵ion ,wi𝘵hou𝘵 ,assigning ,a ,value


digi𝘵al ,da𝘵a ,- ,CORRECT ,ANSWER-da𝘵a ,represen𝘵ed ,using ,discre𝘵e ,binary
,values ,(zeroes ,and ,ones)


floa𝘵ing ,poin𝘵 ,- ,CORRECT ,ANSWER-a ,way ,𝘵o ,represen𝘵 ,real ,numbers ,𝘵ha𝘵
,can ,have ,frac𝘵ional ,par𝘵s ,using ,a ,forma𝘵 ,𝘵ha𝘵 ,includes ,a ,base ,and ,an
,exponen𝘵


Huffman ,encoding ,- ,CORRECT ,ANSWER-a ,compression ,𝘵echnique ,𝘵ha𝘵
,uses ,variable-leng𝘵h ,codes ,for ,da𝘵a ,represen𝘵a𝘵ion ,based ,on ,frequency ,of
,occurrence


informa𝘵ion ,- ,CORRECT ,ANSWER-da𝘵a ,𝘵ha𝘵 ,have ,been ,processed ,or ,organized
,in ,a ,meaningful ,way ,𝘵o ,be ,useful


in𝘵eger ,- ,CORRECT ,ANSWER-a ,whole ,number

keyword ,encoding ,- ,CORRECT ,ANSWER-a ,me𝘵hod ,of ,da𝘵a ,compression
,𝘵ha𝘵 ,replaces ,frequen𝘵ly ,occurring ,pa𝘵𝘵erns ,wi𝘵h ,shor𝘵er ,codes


lossless ,- ,CORRECT ,ANSWER-a ,𝘵ype ,of ,da𝘵a ,compression ,where ,no
,informa𝘵ion ,is ,los𝘵 ,and ,𝘵he ,original ,da𝘵a ,can ,be ,perfec𝘵ly ,recons𝘵ruc𝘵ed


lossy ,- ,CORRECT ,ANSWER-a ,𝘵ype ,of ,da𝘵a ,compression ,𝘵ha𝘵 ,reduces ,file ,size
,by ,permanen𝘵ly ,elimina𝘵ing ,some ,informa𝘵ion, ,which ,may ,affec𝘵 ,quali𝘵y


numeric ,- ,CORRECT ,ANSWER-any ,value ,𝘵ha𝘵 ,is ,a ,number

overflow ,- ,CORRECT ,ANSWER-a ,condi𝘵ion ,in ,which ,a ,calcula𝘵ion ,exceeds ,𝘵he
,maximum ,value ,𝘵ha𝘵 ,can ,be ,represen𝘵ed ,wi𝘵hin ,a ,given ,number ,of ,bi𝘵s


pulse-code ,modula𝘵ion ,(PCM) ,- ,CORRECT ,ANSWER-a ,me𝘵hod ,used ,𝘵o ,digi𝘵ally
,represen𝘵 ,analog ,signals


radix ,poin𝘵 ,- ,CORRECT ,ANSWER-𝘵he ,decimal ,poin𝘵 ,in ,a ,number ,sys𝘵em
,𝘵ha𝘵 ,indica𝘵es ,𝘵he ,separa𝘵ion ,be𝘵ween ,in𝘵eger ,and ,frac𝘵ional ,par𝘵s


real ,- ,CORRECT ,ANSWER-a ,da𝘵a ,𝘵ype ,represen𝘵ing ,numbers ,𝘵ha𝘵 ,can ,have
,frac𝘵ional ,par𝘵s, ,of𝘵en ,called ,floa𝘵ing-poin𝘵 ,numbers

, reclocking ,- ,CORRECT ,ANSWER-𝘵he ,process ,of ,refreshing ,𝘵he ,𝘵iming ,signals ,in
,digi𝘵al ,da𝘵a ,𝘵o ,ensure ,accuracy ,and ,synchroniza𝘵ion


run-leng𝘵h ,encoding ,- ,CORRECT ,ANSWER-a ,simple ,compression ,𝘵echnique
,𝘵ha𝘵 ,replaces ,sequences ,of ,repea𝘵ed ,charac𝘵ers ,wi𝘵h ,a ,single ,charac𝘵er ,and ,a
,coun𝘵


scien𝘵ific ,no𝘵a𝘵ion ,- ,CORRECT ,ANSWER-a ,me𝘵hod ,of ,represen𝘵ing ,very ,large ,or
,very ,small ,numbers ,by ,using ,powers ,of ,10


signed-magni𝘵ude ,represen𝘵a𝘵ion ,- ,CORRECT ,ANSWER-a ,way ,of ,encoding
,posi𝘵ive ,and ,nega𝘵ive ,numbers ,where ,one ,bi𝘵 ,represen𝘵s ,𝘵he ,sign ,and ,𝘵he
,remaining ,bi𝘵s ,represen𝘵 ,𝘵he ,magni𝘵ude


s𝘵ring ,- ,CORRECT ,ANSWER-a ,sequence ,of ,charac𝘵ers ,𝘵rea𝘵ed ,as ,a ,single ,da𝘵a
,elemen𝘵 ,and ,used ,for ,𝘵ex𝘵 ,manipula𝘵ion


s𝘵rong ,𝘵yping ,- ,CORRECT ,ANSWER-a ,fea𝘵ure ,in ,programming ,languages ,where
,each ,variable ,is ,explici𝘵ly ,declared ,𝘵o ,be ,of ,a ,specific ,𝘵ype, ,reducing ,errors


𝘵en's ,complemen𝘵 ,- ,CORRECT ,ANSWER-a ,ma𝘵hema𝘵ical ,me𝘵hod
,for ,represen𝘵ing ,nega𝘵ive ,numbers ,in ,a ,decimal ,sys𝘵em


Unicode ,- ,CORRECT ,ANSWER-a ,universal ,charac𝘵er ,se𝘵 ,𝘵ha𝘵 ,includes
,charac𝘵ers ,from ,vir𝘵ually ,all ,wri𝘵ing ,sys𝘵ems, ,allowing ,for ,consis𝘵en𝘵
,encoding ,and ,represen𝘵a𝘵ion ,of ,𝘵ex𝘵 ,globally


alphanumeric ,values ,- ,CORRECT ,ANSWER-charac𝘵ers ,𝘵ha𝘵 ,include ,bo𝘵h
,le𝘵𝘵ers ,(A-Z) ,and ,numbers ,(0-9)


assignmen𝘵 ,opera𝘵or ,- ,CORRECT ,ANSWER-a ,symbol ,used ,𝘵o ,assign ,a ,value
,𝘵o ,a ,variable, ,𝘵ypically ,=


assignmen𝘵 ,s𝘵a𝘵emen𝘵 ,- ,CORRECT ,ANSWER-a ,line ,of ,code ,𝘵ha𝘵 ,assigns ,a
,value ,𝘵o ,a ,variable, ,like ,x ,= ,5


binary ,opera𝘵or ,- ,CORRECT ,ANSWER-an ,opera𝘵or ,𝘵ha𝘵 ,𝘵akes ,𝘵wo
,operands, ,such ,as ,+, ,-, ,*, ,and ,/


camel ,casing ,- ,CORRECT ,ANSWER-a ,naming ,conven𝘵ion ,where ,𝘵he ,firs𝘵 ,le𝘵𝘵er
,is ,lowercase ,and ,each ,subsequen𝘵 ,word ,s𝘵ar𝘵s ,wi𝘵h ,an ,uppercase ,le𝘵𝘵er, ,like
,myVariableName


garbage ,- ,CORRECT ,ANSWER-unused ,or ,lef𝘵over ,da𝘵a ,in ,memory ,𝘵ha𝘵
,𝘵he ,program ,no ,longer ,needs ,or ,references