D684 Introduction to Computer Science Test – Verified Questions & Correct Answers, Graded A+

D684 - Introduction to Computer Science
Test with Questions 𝚊nd Correct Answers
2026 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