If there exist no integer x such that x^2 ≡ q (mod n). then q is called __________(a) Quadratic Residue(b) Quadratic Nonresidue(c) Pseudoprime(d) None of the mentionedI had been asked this question during a job interview.The question is from Number Theory topic in chapter Number Theory and Cryptography of Discrete Mathematics

If there exist no integer x such that x^2 ≡ q (mod n). then q is cal

1.	If there exist no integer x such that x^2 ≡ q (mod n). then q is called __________(a) Quadratic Residue(b) Quadratic Nonresidue(c) Pseudoprime(d) None of the mentionedI had been asked this question during a job interview.The question is from Number Theory topic in chapter Number Theory and Cryptography of Discrete Mathematics
Answer» Correct CHOICE is (B) Quadratic Nonresidue To EXPLAIN I WOULD say: q is called quadratic nonresidue if it is not congurent to a perfect square modulo n.

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