solved ocp questions

8/9/2019 Solved Ocp Questions

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1.)which of the following statements are DML Statements?

1.select2.create3.Truncate4.commit

ans :1

2)char datatype "hhh"=="hhh "

what is the result?

1.true2.false

ans :1

3)select distinct empid,empname from employees

will this query execute?

1.true2.false

ans:1

4)Dual table has how many colums and rows?

1. 1 and 12. 0 and 13. 1 and 0

4. 0 and 0

ans : 1

5)select empname from employess empname like 'jack%';

what are the values given below can be returned by the query?

1.jackson and sonjack2.jackson3.sonjack4.none fo the above

ans :2

6).what is the default beahaviour of order by?

1.ascending order2.descending order

ans:1


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7)Null values will appear in the top of the result when using ascendingorder by?

1.true2.false

ans:2

8)Group by statement can appear after order by ?

1.true2.false

ans:2

9)Column alias name can be used for where clause ?

1.true2.false

ans :2

10.where clause can not appear after group by clause?

1.true2.false

ans:1

11.Which of the following commands are not supported in isql *plu?

A. ACCEPT

B. HOSTC. EXITD. SPOOLE. STORE

ans:all of the above

12.what are the functions can return non-null value when called withnull value?

A. upperB. ASCIIC. CONCATD. DECODEE. NVL

ans:C,D,E


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13.select substr("the great ocp", -3) result from dual;

A. theB. greatC. ocpD. the great

ans: C

14.what is ceil(-21.3) and ceil(-21.5) ?

A. -21,-21B. -22,-21C. -22,-22D. -22,-21

ans:A

14.what is floor(-21.3) and floor(-21.5) ?

A. -21,21B. -22,-21C. -22,-22D. -22,-21

ans:c

15.The user function is a singlerowfunction which returns the currentuser name?

true

false

ans:true

16.Trignometric function uses?

A. radiansB. degreesC. gradientsD. both radians and degrees

ans:A

17.which function uses if then else logic

A. decodeB. initcapC. collaceD. replaceE. ifelse


4/9

ans :A

18.In group functions, the exact numer of inputs is determined afterthe query is executed

A. trueB. false

ans:A

19.find out the correct sequence?

A. groupby,orderby,havingB. having,groupby,orderbyC. orderby,having,groupbyD. groupby,having,orderbyE. none of the above

ans: D

19.Nesting functions are not supported.

A. trueB. false

ans :B

20.GROUP BY, ORDER BY can be used in WHERE clause.

A. trueB. false

ans:B

21.Alias names can be used in

A. natural join syntaxB. join using syntaxC. join on syntaxD. All of the above

ans :c

22.How many joins required to avod cartesian product?

ans: n-1 joins for n tables


5/9

23.Which of these are set operators?

A. unionB. union allC. intersect

D. minusE. all of the above

ans :E

24.A single row subquery may return many values.

A. trueB. false

ans :B

25.select regionid,regioname as region from regions order by 1,regionsgroup by regionid;

Will the above statement successfully execute?

A. trueB. false

ans:B

26.Which statement resists the high water mark?

A. truncateB. deleteC. dropD. none of the above

ans :A

27.Which statement will not end a transaction?

A. commitB. alterC. insertD. create

ans:C

28.Long datatype can appear in


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A. order byB. whereC. group byD. none of the above

ans:D

29.Which datatype stores data outside oracle?

A. long rawB. blobC. bfileD. clob

ans:C

30.ALTER statement can rename a column

A. trueB. false

ans:B

31.Drop table command will

A. drop indexB. drop triggersC. drop constraintsD. all of the above

ans: D

32.The default constraint name begins with SYS_

A. trueB. false

ans:A

33.The not null constraint can be defined in table level?

A. trueB. false

ans :B


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34.which constraint will not allow null value?

A. checkB. uniqueC. primary

D. not null

ans:C,D

35.which is not supported in select clause in a view definition?

A. havingB. cubeC. group byD. order byE. none of the above

ans:E (for update not supported)

36.Rownum is not stored in the database

A. trueB. false

ans :A(it is assigned as each record is fetched)

37.what are the special chars allowed in table name?

A. %B. #C. $D. @E. &

ans:B,C

38.A view can be create before the creation of its base table

A. true

B. false

ans:A (with force option in create view statement)

39.what is the default value for maxvalue in decreasing sequence?

A. -1B. 0


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C. 1D. nomaxvalue

ans:A

40.Before referencing currval nextval should be referenced

A. trueB. false

ans:A

41.B tree indexes is suitable for high cardinality columns

truefalse

ans :A

42.Bitmap indexes is suitable for high cardinality columns

truefalse

ans:B

43.In which order objects are referenced?

A. objects owned by current user,public synonym,private synonym

B. objects owned by current user,private synonym,public synonymC. private synonym,public synonym,objects owned by currentuser'D. none of the above

ans :B

44.PL/SQL function should return a value

A. trueB. false

ans:A

45.PL/SQL procedure should return a value

A. trueB. false


9/9

ans: B

46.Grant command has implicit commit

A. true

B. false

ans :A

47.alter sequence ramharid increment by 4.4;

Will the above statement execute?

A. trueB. false

ans:B

48.

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