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All MCQs
Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
Choose an option to check your answer.
A.
an object can be uniquely recognized independent of its attribute values
B.
objects cannot be referenced directly
C.
two objects are the same only when all attributes match
D.
identity is always the physical disk block number
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Correct Answer: A. an object can be uniquely recognized independent of its attribute values
Explanation:
This statement is correct because object identity means that an object can be uniquely recognized independent of its attribute values.
Choose an option to check your answer.
A.
two objects are the same only when all attributes match
B.
identity is always the physical disk block number
C.
an object can be uniquely recognized independent of its attribute values
D.
objects cannot be referenced directly
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Correct Answer: C. an object can be uniquely recognized independent of its attribute values
Explanation:
object identity is used in Advanced DBMS because an object can be uniquely recognized independent of its attribute values.
Choose an option to check your answer.
A.
objects cannot be referenced directly
B.
two objects are the same only when all attributes match
C.
an object can be uniquely recognized independent of its attribute values
D.
identity is always the physical disk block number
Show Answer
Correct Answer: C. an object can be uniquely recognized independent of its attribute values
Explanation:
The correct answer explains object identity in the context of Advance Data Models.
Choose an option to check your answer.
A.
it stores only two-dimensional numeric tables
B.
it allows only SQL aggregation queries
C.
it prevents relationships between objects
D.
it stores data as objects with identity, state, and behavior
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Correct Answer: D. it stores data as objects with identity, state, and behavior
Explanation:
This statement is correct because object-oriented database model means that it stores data as objects with identity, state, and behavior.
Choose an option to check your answer.
A.
it stores only two-dimensional numeric tables
B.
it prevents relationships between objects
C.
it allows only SQL aggregation queries
D.
it stores data as objects with identity, state, and behavior
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Correct Answer: D. it stores data as objects with identity, state, and behavior
Explanation:
object-oriented database model is used in Advanced DBMS because it stores data as objects with identity, state, and behavior.
Choose an option to check your answer.
A.
it stores only two-dimensional numeric tables
B.
it prevents relationships between objects
C.
it stores data as objects with identity, state, and behavior
D.
it allows only SQL aggregation queries
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Correct Answer: C. it stores data as objects with identity, state, and behavior
Explanation:
The correct answer explains object-oriented database model in the context of Advance Data Models.
Choose an option to check your answer.
A.
stores every record only as a plain text file
B.
executes queries without a DBMS
C.
removes the need for keys and constraints
D.
it extends the relational model with complex types, inheritance, and methods while keeping tables
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Correct Answer: D. it extends the relational model with complex types, inheritance, and methods while keeping tables
Explanation:
This statement is correct because object-relational data model means that it extends the relational model with complex types, inheritance, and methods while keeping tables.
Choose an option to check your answer.
A.
executes queries without a DBMS
B.
removes the need for keys and constraints
C.
it extends the relational model with complex types, inheritance, and methods while keeping tables
D.
stores every record only as a plain text file
Show Answer
Correct Answer: C. it extends the relational model with complex types, inheritance, and methods while keeping tables
Explanation:
object-relational data model is used in Advanced DBMS because it extends the relational model with complex types, inheritance, and methods while keeping tables.
Choose an option to check your answer.
A.
removes the need for keys and constraints
B.
stores every record only as a plain text file
C.
executes queries without a DBMS
D.
it extends the relational model with complex types, inheritance, and methods while keeping tables
Show Answer
Correct Answer: D. it extends the relational model with complex types, inheritance, and methods while keeping tables
Explanation:
The correct answer explains object-relational data model in the context of Advance Data Models.
Choose an option to check your answer.
A.
free
B.
fprintf
C.
fscanf
D.
fclose
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Correct Answer: C. fscanf
Explanation:
The correct answer is fscanf.
Choose an option to check your answer.
A.
malloc
B.
fscanf
C.
fopen
D.
fprintf
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Correct Answer: D. fprintf
Explanation:
The correct answer is fprintf.
Choose an option to check your answer.
A.
a
B.
w
C.
r
D.
read
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Correct Answer: A. a
Explanation:
The correct answer is a.
