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question_answer1) Direction: In the questions given below, there are two statements marked as Assertion (A) and Reason (R). Choose the correct option out of the choices given below in each question: Assertion (A): Primary key is a set of one or more attributes that identify tuples in a relation. Reason (R): Every table must have one primary key.
question_answer2) Direction: In the questions given below, there are two statements marked as Assertion (A) and Reason (R). Choose the correct option out of the choices given below in each question: Assertion (A): Foreign key is a non-key attribute whose value is derived from primary key of another table. Reason (R): Each foreign key refers a candidate key in a relation.
question_answer3) Direction: In the questions given below, there are two statements marked as Assertion (A) and Reason (R). Choose the correct option out of the choices given below in each question: Assertion (A): Data Integrity means that data is accurate and consistent in the database. Reason (R): Data integrity also ensures that your data is safe from any outside forces.
question_answer4) Direction: In the questions given below, there are two statements marked as Assertion (A) and Reason (R). Choose the correct option out of the choices given below in each question: Assertion (A): There can be multiple primary key in a table. Reason (R): Duplicate values cannot be entered in primary key.
question_answer5) Direction: In the questions given below, there are two statements marked as Assertion (A) and Reason (R). Choose the correct option out of the choices given below in each question: Assertion (A): A database can have only one table. Reason (R): If a piece of data is stored in two places in the database, then storage space is wasted.
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