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SQL - Quiz - QA FOR STUDENTS Quiz
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ISTQB TEST QUESTIONS
SQL - Quiz - QA FOR STUDENTS
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SQL - Quiz - QA FOR STUDENTS Quiz
SQL - Quiz - QA FOR STUDENTS
1) Which of the operations constitute a basic set of operations for manipulating relational data?
Predicate calculus
Relational calculus
Relational algebra
None of the above
2) NULL is
the same as 0 for integer
the same as blank for character
the same as 0 for integer and blank for character
not a value
3) A data dictionary is a special file that contains:
The name of all fields in all files.
The width of all fields in all files.
The data type of all fields in all files.
All of the above.
4) The result of the UNION operation between R1 and R2 is a relation that includes
all the tuples of R1
all the tuples of R2
all the tuples of R1 and R2
all the tuples of R1 and R2 which have common columns
5) A set of possible data values is called
Attribute.
Degree.
Tuple.
Domain.
6) A table joined with itself is called
JOIN
Self Join
Outer Join
Equi Join
7) The natural join is equal to :
Cartesian Product
Combination of Union and Cartesian product
Combination of selection and Cartesian product
Combination of projection and Cartesian product
8) _____________ function divides one numeric expression by another and returns the remainder.
POWER
MOD
ROUND
REMAINDER
9) In E-R Diagram relationship type is represented by
Ellipse
Dashed ellipse
Rectangle
Diamond
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