ISYS mnmn209 mnmnFINAL mnmnEXAM mnmnNEWEST mnmn2026 mnmnACTUAL
mnmn EXAM| m n m n COMPLETE mnmn250 mnmnREAL mnmnEXAM
QUESTIONS mnmnAND mnmnCORRECT mnmnVERIFIED
mnmn
ANSWERS/ mnmnALREADY mnmnGRADED mnmnA+| mnmnISYS mnmn209
mnmn
mnmn FINAL mnmnEXAM mnmnREVIEW mnmn(MOST mnmnRECENT!!)
1. In mnmnan mnmnentity-relationship mnmn(ER) mnmndiagram, mnmnwhich
mnmn symbol m n m n represents mnmnan mnmnentity?
A) Circle
B) Rectangle
C) Diamond
D) Line
Correct mnmnAnswer: mnmnB
Rationale: mnmnIn mnmnER mnmndiagrams, mnmnentities mnmn(tables) mnmnare
mnmnrepresented mnmnby mnmnrectangles. mnmnAttributes mnmnare mnmnovals mnmn(or
mnmn circles), mnmnrelationships mnmnare mnmndiamonds, mnmnand mnmnlines mnmnconnect
mnmnentities mnmnto mnmnrelationships.
2. Which mnmnof mnmnthe mnmnfollowing mnmnbest mnmndescribes mnmna mnmnprimary
mnmnkey?
A) A mnmn field mnmn that mnmn allows mnmn duplicate mnmn values
B) A mnmnfield mnmnthat mnmnuniquely mnmnidentifies mnmneach mnmnrecord mnmnin mnmna
mnmntable
1
,C) Amnmnfieldmnmnthatmnmncanmnmnbemnmnnull
D) A mnmnfield mnmnthat mnmnreferences mnmnanother mnmntable
2
,Correct mnmnAnswer: mnmnB
Rationale: mnmnA mnmnprimary mnmnkey mnmnuniquely mnmnidentifies mnmneach
mnmn row/record mnmnin mnmna mnmntable. mnmnIt mnmnmust mnmncontain mnmnunique, mnmnnon-
null mnmnvalues. mnmnOption mnmnD mnmndescribes mnmna mnmnforeign mnmnkey.
3. A mnmnforeign mnmnkey mnmnin mnmna mnmntable mnmnmust mnmnmatch mnmnwhich mnmnof
mnmnthe mnmnfollowing mnmninmnmnanothermnmntable?
A) Any m nmn indexed mnmn column
B) A mnmnprimary mnmnkey mnmnor mnmnunique mnmnkey
C) Any mnmncolumn mnmnwith mnmnthe mnmnsame mnmnname
D) A mnmncolumn mnmn that mnmnallows mnmn nulls
Correct mnmnAnswer: mnmnB
Rationale:mnmnAmnmnforeignmnmnkeymnmnreferencesmnmnamnmnprimarymnmnkey
mnmn ormnmnuniquemnmnkey mnmnin mnmnanother mnmntable mnmnto mnmnenforce
mnmn referential mnmnintegrity. mnmnIt mnmndoes mnmnnot mnmnrequire mnmnmatching
mnmn column mnmnnames.
4. What mnmnis mnmnthe mnmnmain mnmnpurpose mnmnof mnmnnormalization mnmnin
mnmn database m n m n design?
A) To mnmnincrease mnmndata mnmnredundancy
B) To mnmnreduce mnmndata mnmnredundancy mnmnand mnmnavoid mnmnupdate
mnmn anomalies
C) To mnmnmake mnmnqueries mnmnrun mnmnfaster
D) To mnmnencrypt mnmnsensitive mnmndata
3
, Correct mnmnAnswer: mnmnB
Rationale: mnmnNormalization mnmnorganizes mnmndata mnmnto mnmnminimize
mnmn redundancy mnmnand mnmneliminate mnmnanomalies mnmn(insertion, mnmnupdate,
mnmndeletion mnmnanomalies). mnmn Performance m nm n may m nm n sometimes
mnmn decrease, mnmn not mnmn increase.
5. Which mnmnnormal mnmnform mnmnrequires mnmnthat mnmnall mnmnnon-key
mnmn attributes mnmnbe mnmnfully mnmnfunctionally mnmndependent mnmnon mnmnthe
mnmn entire mnmnprimary mnmnkey mnmn(no mnmnpartial mnmndependencies)?
A) First m nmn normal m nm n form m n m n (1NF)
B) Second m n m n normal m n m n form m n m n (2NF)
C) Third mnmnnormal mnmnform mnmn(3NF)
D) Boyce-Codd mnmnnormal mnmnform mnmn(BCNF)
Correct mnmnAnswer: mnmnB
Rationale: mnmn2NF mnmneliminates mnmnpartial mnmndependencies mnmn(where
mnmn a mnmnnon-key mnmnattribute mnmndepends mnmnon mnmnonly mnmnpart mnmnof mnmna
mnmn composite mnmnprimary mnmnkey). mnmn1NF mnmneliminates mnmnrepeating
mnmn groups. mnmn3NF mnmneliminates mnmntransitive mnmndependencies.
6. A mnmntable mnmnis mnmnin mnmn1NF mnmnif mnmnit mnmncontains:
A) No mnmnrepeatingmnmngroups
B) No mnmnpartialmnmndependencies
C) No mnmntransitive mnmndependencies
4
mnmn EXAM| m n m n COMPLETE mnmn250 mnmnREAL mnmnEXAM
QUESTIONS mnmnAND mnmnCORRECT mnmnVERIFIED
mnmn
ANSWERS/ mnmnALREADY mnmnGRADED mnmnA+| mnmnISYS mnmn209
mnmn
mnmn FINAL mnmnEXAM mnmnREVIEW mnmn(MOST mnmnRECENT!!)
1. In mnmnan mnmnentity-relationship mnmn(ER) mnmndiagram, mnmnwhich
mnmn symbol m n m n represents mnmnan mnmnentity?
A) Circle
B) Rectangle
C) Diamond
D) Line
Correct mnmnAnswer: mnmnB
Rationale: mnmnIn mnmnER mnmndiagrams, mnmnentities mnmn(tables) mnmnare
mnmnrepresented mnmnby mnmnrectangles. mnmnAttributes mnmnare mnmnovals mnmn(or
mnmn circles), mnmnrelationships mnmnare mnmndiamonds, mnmnand mnmnlines mnmnconnect
mnmnentities mnmnto mnmnrelationships.
2. Which mnmnof mnmnthe mnmnfollowing mnmnbest mnmndescribes mnmna mnmnprimary
mnmnkey?
A) A mnmn field mnmn that mnmn allows mnmn duplicate mnmn values
B) A mnmnfield mnmnthat mnmnuniquely mnmnidentifies mnmneach mnmnrecord mnmnin mnmna
mnmntable
1
,C) Amnmnfieldmnmnthatmnmncanmnmnbemnmnnull
D) A mnmnfield mnmnthat mnmnreferences mnmnanother mnmntable
2
,Correct mnmnAnswer: mnmnB
Rationale: mnmnA mnmnprimary mnmnkey mnmnuniquely mnmnidentifies mnmneach
mnmn row/record mnmnin mnmna mnmntable. mnmnIt mnmnmust mnmncontain mnmnunique, mnmnnon-
null mnmnvalues. mnmnOption mnmnD mnmndescribes mnmna mnmnforeign mnmnkey.
3. A mnmnforeign mnmnkey mnmnin mnmna mnmntable mnmnmust mnmnmatch mnmnwhich mnmnof
mnmnthe mnmnfollowing mnmninmnmnanothermnmntable?
A) Any m nmn indexed mnmn column
B) A mnmnprimary mnmnkey mnmnor mnmnunique mnmnkey
C) Any mnmncolumn mnmnwith mnmnthe mnmnsame mnmnname
D) A mnmncolumn mnmn that mnmnallows mnmn nulls
Correct mnmnAnswer: mnmnB
Rationale:mnmnAmnmnforeignmnmnkeymnmnreferencesmnmnamnmnprimarymnmnkey
mnmn ormnmnuniquemnmnkey mnmnin mnmnanother mnmntable mnmnto mnmnenforce
mnmn referential mnmnintegrity. mnmnIt mnmndoes mnmnnot mnmnrequire mnmnmatching
mnmn column mnmnnames.
4. What mnmnis mnmnthe mnmnmain mnmnpurpose mnmnof mnmnnormalization mnmnin
mnmn database m n m n design?
A) To mnmnincrease mnmndata mnmnredundancy
B) To mnmnreduce mnmndata mnmnredundancy mnmnand mnmnavoid mnmnupdate
mnmn anomalies
C) To mnmnmake mnmnqueries mnmnrun mnmnfaster
D) To mnmnencrypt mnmnsensitive mnmndata
3
, Correct mnmnAnswer: mnmnB
Rationale: mnmnNormalization mnmnorganizes mnmndata mnmnto mnmnminimize
mnmn redundancy mnmnand mnmneliminate mnmnanomalies mnmn(insertion, mnmnupdate,
mnmndeletion mnmnanomalies). mnmn Performance m nm n may m nm n sometimes
mnmn decrease, mnmn not mnmn increase.
5. Which mnmnnormal mnmnform mnmnrequires mnmnthat mnmnall mnmnnon-key
mnmn attributes mnmnbe mnmnfully mnmnfunctionally mnmndependent mnmnon mnmnthe
mnmn entire mnmnprimary mnmnkey mnmn(no mnmnpartial mnmndependencies)?
A) First m nmn normal m nm n form m n m n (1NF)
B) Second m n m n normal m n m n form m n m n (2NF)
C) Third mnmnnormal mnmnform mnmn(3NF)
D) Boyce-Codd mnmnnormal mnmnform mnmn(BCNF)
Correct mnmnAnswer: mnmnB
Rationale: mnmn2NF mnmneliminates mnmnpartial mnmndependencies mnmn(where
mnmn a mnmnnon-key mnmnattribute mnmndepends mnmnon mnmnonly mnmnpart mnmnof mnmna
mnmn composite mnmnprimary mnmnkey). mnmn1NF mnmneliminates mnmnrepeating
mnmn groups. mnmn3NF mnmneliminates mnmntransitive mnmndependencies.
6. A mnmntable mnmnis mnmnin mnmn1NF mnmnif mnmnit mnmncontains:
A) No mnmnrepeatingmnmngroups
B) No mnmnpartialmnmndependencies
C) No mnmntransitive mnmndependencies
4
