16. How many columns are retrieved from this query:
SELECT address1||','||address2||','||address2 "Adress" FROM employee;
(A) 1
(B) 2
(C) 3
(D) 0
17. To produce a meaningful result set without any cartesian products, what is the minimum number of conditions that should appear in the WHERE clause of a four-table join?
(A) 8
(B) 3
(C) 4
(D) 5
18. Assuming today is Monday, 10 July 2000, what is returned by this statement:
SELECT to_char(NEXT_DAY(sysdate, 'MONDAY'), 'DD-MON-RR') FROM dual;
(A) 10-JUL-00
(B) 12-JUL-00
(C) 11-JUL-00
(D) 17-JUL-00
19. Which character is used to continue a statement in SQL*Plus?
(A) *
(B) /
(C) -
(D) @
20. When a user creates an object without a TABLESPACE clause, where will Oracle store the segment?
(A) System tablespace
(B) Users tablespace
(C) Default tablespace for the user
(D) Oracle will give an error
21. The primary key on table EMP is the EMPNO column. Which of the following statements will not use the associated index on EMPNO?
(A) select * from EMP where nvl(EMPNO, '00000') = '59384';
(B) select * from EMP where EMPNO = '59384';
(C) select EMPNO, LASTNAME from EMP where EMPNO = '59384';
(D) select 1 from EMP where EMPNO = '59834';
22. Which character function can be used to return a specified portion of a character string?
(A) INSTR
(B) SUBSTRING
(C) SUBSTR
(D) POS
23. Which command will delete all data from a table and will not write to the rollback segment?
(A) DROP
(B) DELETE
(C) CASCADE
(D) TRUNCATE
24. Which of the following can be a valid column name?
(A) Column
(B) 1966_Invoices
(C) Catch_#22
(D) #Invoices
25. Which Oracle access method is the fastest way for Oracle to retrieve a single row?
(A) Primary key access.
(B) Access via unique index
(C) Table access by ROWID
(D) Full table scan
26. In this PL/SQL statement, which of the following lines will produce an error?
(A) cursor CAPITALS is select CITY, STATE
(B) into my_city, my_state
(C) from CITIES
(D) where CAPITAL = 'Y';
27. In a PL/SQL block, a variable is declared as NUMBER without an initial value. What will its value be when it is used in the executable section of the PL/SQL block?
(A) NULL
(B) 0
(C) Results in a compilation error
(D) An exception will be raised
28. PL/SQL raises an exception, in which TWO of the following cases:
(A) When a SELECT statement returns one row
(B) When a SELECT statement returns more than one row
(C) When the datatypes of SELECT clause and INTO clause do not match
(D) When INTO statement is missing in the SELECT statement
29. What is the result if two NULL values are compared to each other?
(A) TRUE
(B) FALSE
(C) Undefined
(D) NULL
30. Functions for error trapping are contained in which section of a PL/SQL block?
(A) Header
(B) Declarative
(C) Executable
(D) Exception
ORACLE
======
Oracle at BIT...well i cleared the written but the interview was
really rigourous...it was in 4 rounds....with streching upto 8
hrs
per candidate who was selelcted....Oracle took a total of 10
people(9 BEs and 1 MCA)
The oracle paper was difficult to remember...
but i can give brief outline as to what could be studied...The
Technical consisted of C,Pl/SQL and JAVA....go through Ivan
Bayross for Pl/SQL and Pointers in C by Kanetkar....some of the
qs
were directly from there.....
u may also do DBMS concepts.....as to what is Data
Modelling,Transactions, Distributed Databases
In my interview.....first we had a short test on C Programming
where in i
was given C programs to write on PREORDER Tree traversal and
Conversion of
Infix to Postfix expression...the interview followed where they
grilled me
on Java and C preprocessors from head to toe...but was unable to
clear the
second round of interview
TCS
===
TCS at BIT was really great....it took a whopping 63(56 BEs and
7
MCA) the pattern was no different....since i didn't appear for TCS
i
cannot give the wordlist.....but it is only the wordlist that
changed but rest of the pattern was same as JSR and other
RECs..go
through GRE Barrons high frequency word list.....around 16 words
from there...
oracle paper
1. An index is automatically generated with the following
constraints.
a. Check
b. Not null
c. Primary key
d. Foreign key
2. Select mod(16,3) from emp;
a. 1
b. 2
c. 3
d. Error in the stmt
3. The data dictionary view to see the list of constraints enabled
on a
table is
a. user_tables
b. user_table_constraints
c. user_constraints
d. There is no dictionary view available for the same
4. Identify the pseudocolumns
a. rowid
b. sysdate
c. rowval
d. dual
5. select deptno, count(empno) from emp
where count(empno)>=5
group by deptno;
identify the line no which contains the error
a. 1
b. 2
c. 3
d. 1,3
6. choose the group function that can be used with any data type
a. sum()
b. min()
c. avg()
d. all
7. which of the following sequence is true
a. WHERE,HAVING,GROUPBY,ORDERBY
b. GROUPBY, WHERE, HAVING, ORDERBY
c. ORDERBY,GROUPBY,WHERE,HAVING
d. NONE OF THE ABOVE
8. which of the proper keyword to deallocate memory
a. free
b. delete
c. clear
d. remove
9. what is the index no of the last element of an array with 29
elements
a. 29
b. 28
c. 0
d. programmer defined
10. what is the final value of x when the code for(int
x=0;x<10;x++) is
run?
a. 10
b. 9
c. 0
d. 1
11. what is the data type of FILE?
a. integer
b. union
c. pointer
d. structure
12. if "a" is an array of 5*5 dimension, a[2][4] is same as
a. **(a+2+4)
b. *(a+2) + *(a+4)
c. **(a+2)+4
d. *(*a+2)+4)
13. what is the output of ..
#include<stdio.h>
void main()
{
char buffer[10]={"Genesis"};
printf("%d",&buffer[4]-(buffer));
}
a. 3
b. 4
c. 0
d. illegal pointer subtraction
14. what is the output for
#include<stdio.h>
main()
{
static int a[]={5,10,15,20};
int * ptr=a;
int ** ptr_ptr=&ptr;
printf("\n %d",**ptr_ptr++);
}
a. 5
b. 10
c. 15
d. 6
15. what is the value of expr..
1+2/3*4+1
a. 2
b. 3
c. 4
d. 4.666666
e. 5
16. identify the relationship between the many employees
working
in a dept..
a. one to one
b. one to many
c. many to one
d. many to many
17.there was a table given and it was asked which normal form does
it
follows..
18. the process of including some controlled redundancy for
the
sake of performance
is known as
a. normalization
b. Cartesian product
c. Denormalization
d. None
19. in a doubley linked list
a. the last node contains the address of the first node
b. each node contains the address of previous and next node
c. each node contains the address of previous node
d. none
20. in a queue each node contains
a. the address of previous node
b. address of next node
c. address of both the previous and next node
d. none of the above
Oracle Paper
The test was of 1 hour 30 ques. g apti and 30 of
technical.......some
ques. of g apti were very lengthy so don't end up in solving
them.....time was less......some 15 ques. from arithmetic......and
rest
15
logical,statement interpretation,arrangement,tense
correction......and
like
that......
i am enclosing here the 2 C questions :
1. given a square matrix which consists only of 1 and 0......find
which
rows,which cols and which diagonals consist entirely of 1's.
2. given an array of integers find all possible combinations of
the
numbers whose sum equal to 90.....
ans : knapsack problem (in data structures - aho ullman)
Note : for them solution was not the criteria.......but the
approach
was important......the solution should be generalised and
optimized........optimization was given the top priority........
here is the techincal paper :
plz try to solve them urself by trying on comp.
1. const int MAX=10;
main()
{enum a {a,b,MAX};
print MAX;
}
2. enum object is a const which can only be assigned a value at
initialization or a variable which can be assigned any value in
the
middle of
the program?
3. void *p;
what operation cannot be performed on p?
ans : arithmetic operation unless it is properly typecasted
4. char **p="Hello";
print p,*p,**p
5. main()
{char str[]="Geneius";
print (str);
}
print(char *s)
{if(*s)
print(++s);
printf("%c",*s);
}
6. what does the function fcloseall() does ?
7. main()
{printf("Genius %d",fun(123));
}
fun(int n)
{return (printf("%d",n));
}
8. difference between definition and declaration.
9. find the error?
fun()
{int i=10;
if(i<10)
return 2.0;
else
return 3.0;
}
10. int a=9,b=5,c=3,d;
d=(b-c)<(c-a) ? a : b;
print d
11. 1+2/3*4+1=?
12. In C++, a variable can be defined wherever needed whereas not
in C
13. main()
{int i=4;
fun(i=i/4);
print i;
}
fun(int i)
{return i/2;
}
14. what is an array ?
15. printf("\" NITK %%SURAHKAL%% !\"");
16. difference between scanf and gets in case of string input
17. table t1 m rows and x cols
table t2 n rows and y cols
in t1*t2 rows? cols=?
ans. m*n ,x+y
18. symbol of realtionship between 2 entities?
19. which one cannot come in data modelling
a. customer b. student c. office d. speed
20. can a database table exist without a primary key ?
21. whether higher normal forms better than lower forms as far
redundancy is concerned ?
22. file is at which level
ans. conceptual level
23. what is a foreign key
