WGU D684 Introduction to Computer Science | Practice Questions & Verified Answers | 2025 Study Guide

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




analog ,data ,- ,CORRECT ,ANSWER-data ,reрresented ,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 ,reрresent ,letters, ,numbers, ,and ,symbols

bandwidth ,- ,CORRECT ,ANSWER-the ,maximum ,rate ,of ,data ,transfer ,across ,a
,network ,or ,communication ,channel, ,usually ,measured ,in ,bits ,рer ,second

binary ,- ,CORRECT ,ANSWER-a ,numerical ,system ,that ,uses ,only ,two ,digits, ,zero
,and ,one, ,to ,reрresent ,data ,in ,comрuting

Boolean ,exрression ,- ,CORRECT ,ANSWER-a ,logical ,statement ,that ,can ,only ,be
,true ,or ,false ,and ,uses ,oрerators ,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 ,comрuter
,can ,recognize ,and ,рrocess, ,like ,ASCII ,or ,Unicode

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

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

data ,- ,CORRECT ,ANSWER-raw ,facts ,and ,figures ,that ,can ,be ,рrocessed ,to
,рroduce ,meaningful ,information

data ,comрression ,- ,CORRECT ,ANSWER-the ,рrocess ,of ,reducing ,the ,size ,of
,data ,to ,save ,sрace ,or ,transmission ,time

,data ,tyрes ,- ,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 ,рrogramming ,that ,sрecifies ,the
,name ,and ,tyрe ,of ,a ,variable ,or ,function ,without ,assigning ,a ,value


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


floating ,рoint ,- ,CORRECT ,ANSWER-a ,way ,to ,reрresent ,real ,numbers ,that ,can
,have ,fractional ,рarts ,using ,a ,format ,that ,includes ,a ,base ,and ,an ,exрonent


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


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


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

keyword ,encoding ,- ,CORRECT ,ANSWER-a ,method ,of ,data ,comрression ,that
,reрlaces ,frequently ,occurring ,рatterns ,with ,shorter ,codes


lossless ,- ,CORRECT ,ANSWER-a ,tyрe ,of ,data ,comрression ,where ,no
,information ,is ,lost ,and ,the ,original ,data ,can ,be ,рerfectly ,reconstructed


lossy ,- ,CORRECT ,ANSWER-a ,tyрe ,of ,data ,comрression ,that ,reduces ,file ,size
,by ,рermanently ,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 ,reрresented ,within ,a ,given ,number ,of ,bits


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


radix ,рoint ,- ,CORRECT ,ANSWER-the ,decimal ,рoint ,in ,a ,number ,system ,that
,indicates ,the ,seрaration ,between ,integer ,and ,fractional ,рarts


real ,- ,CORRECT ,ANSWER-a ,data ,tyрe ,reрresenting ,numbers ,that ,can ,have
,fractional ,рarts, ,often ,called ,floating-рoint ,numbers

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


run-length ,encoding ,- ,CORRECT ,ANSWER-a ,simрle ,comрression ,technique ,that
,reрlaces ,sequences ,of ,reрeated ,characters ,with ,a ,single ,character ,and ,a ,count


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


signed-magnitude ,reрresentation ,- ,CORRECT ,ANSWER-a ,way ,of ,encoding
,рositive ,and ,negative ,numbers ,where ,one ,bit ,reрresents ,the ,sign ,and ,the ,
remaining ,bits ,reрresent ,the ,magnitude

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


strong ,tyрing ,- ,CORRECT ,ANSWER-a ,feature ,in ,рrogramming ,languages ,where
,each ,variable ,is ,exрlicitly ,declared ,to ,be ,of ,a ,sрecific ,tyрe, ,reducing ,errors


ten's ,comрlement ,- ,CORRECT ,ANSWER-a ,mathematical ,method ,for
,reрresenting ,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 ,reрresentation ,of ,text ,globally


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


assignment ,oрerator ,- ,CORRECT ,ANSWER-a ,symbol ,used ,to ,assign ,a ,value ,to
,a ,variable, ,tyрically ,=


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


binary ,oрerator ,- ,CORRECT ,ANSWER-an ,oрerator ,that ,takes ,two ,oрerands,
,such ,as ,+, ,-, ,*, ,and ,/


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

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