Suppose that x and y are logical vectors of equal positive (nonzero) lengths. Which of the following must return TRUE? Select all correct answers. all((!(x & y)) == ((!x) | (ly)))) all(xor(x, y) & (x & y)) all(((x | y)) == ((!x) | (!y))) all ((!(x & y)) None of the above. ((!x) & (!y)))

Suppose that x and y are logical vectors of equal positive (nonzero) lengths. Which of the following must return TRUE? Select all correct answers. all((!(x & y)) == ((!x) | (ly)))) all(xor(x, y) & (x & y)) all(((x | y)) == ((!x) | (!y))) all ((!(x & y)) None of the above. ((!x) & (!y)))

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Suppose that x and y are logical vectors of equal positive (nonzero) lengths. Which of the following
must return TRUE?
Select all correct answers.
all((! (x & y))
==
all(xor(x, y) & (x & y)))
all((! (x & y))
((!x) | (!y)))
all(((x y)) == ((!x) | (!y))))
== ((!x) & (!y)))
None of the above.

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