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Integrity constraints ensure that changes made to the database by authorized users do not result into loss of data consistency. Which of the following statement(s) is (are) true w.r.t. the examples of integrity constraints ? (A) An instructor Id. No. cannot be null, provided Intructor Id No. being primary key. (B) No two citizens have same Adhar-Id. (C) Budget of a company must be zero.
  • a)
    (A), (B) and (C) are true.
  • b)
    (A) false, (B) and (C) are true.
  • c)
    (A) and (B) are true; (C) false.
  • d)
    (A), (B) and (C) are false.
Correct answer is option 'C'. Can you explain this answer?
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Integrity constraints ensure that changes made to the database by auth...
(A) An instructor Id. No. cannot be null, provided Instructor Id No. being primary key. Correct by Codd's rule (B) No two citizens have same Adhar-Id. Correct because Adhar is identification for citizens so it must be unique (C) Budget of a company must be zero. We cant say or it is not necessarily true So, option (C) is correct.
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Integrity constraints ensure that changes made to the database by auth...

Explanation:

Integrity Constraints:

- Integrity constraints are rules that ensure data integrity in a database. They prevent unauthorized changes that could result in loss of data consistency.

(A) An instructor Id. No. cannot be null, provided Instructor Id No. being primary key:

- This statement is true. In a database table, a primary key uniquely identifies each record. Therefore, the primary key attribute cannot be null as it must have a unique value for each record.

(B) No two citizens have the same Adhar-Id:

- This statement is also true. Aadhar-Id is a unique identifier for each citizen in a country. It should be unique to ensure that there are no duplicate records for the same individual.

(C) Budget of a company must be zero:

- This statement is false. The budget of a company can vary and is not required to be zero. It can be a positive value, negative value, or zero depending on the financial status of the company.

Therefore, the correct answer is option (C), where (A) and (B) are true, and (C) is false.
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Integrity constraints ensure that changes made to the database by authorized users do not result into loss of data consistency. Which of the following statement(s) is (are) true w.r.t. the examples of integrity constraints ? (A) An instructor Id. No. cannot be null, provided Intructor Id No. being primary key. (B) No two citizens have same Adhar-Id. (C) Budget of a company must be zero.a)(A), (B) and (C) are true.b)(A) false, (B) and (C) are true.c)(A) and (B) are true; (C) false.d)(A), (B) and (C) are false.Correct answer is option 'C'. Can you explain this answer?
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