2. What should the pre-condition P be in each of the following correctness statements for the statement to be an instance of Hoare's assignment axiom scheme? (a) P { x = (b) P { y 1; } x <= 2 = x - (c) P { i i (d) P { i i - - y; } y*y > 5 k; For All (i=0; i<10) i+k > O k; } Exists (k=0%; k i

2. What should the pre-condition P be in each of the following correctness statements for the statement to be an instance of Hoare's assignment axiom scheme? (a) P { x = (b) P { y 1; } x <= 2 = x - (c) P { i i (d) P { i i - - y; } y*y > 5 k; For All (i=0; i<10) i+k > O k; } Exists (k=0%; k i

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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Concept explainers

Bare bones programming language

Bare bones programming language is a low-level programming language that gives a detailed stepwise description of a program. It has a tight program design and in-depth understanding of the toolchain. It is based on the target environment and is used for safe coding practices. C programming language is a type of bare bones programming language.

Question

2. What should the pre-condition P be in each of the following correctness statements for the
statement to be an instance of Hoare's assignment axiom scheme?
(a) P { x
(b) P { y
=
1; } x <= 2
= x
-
y; } y*y > 5
(c) P { i
= i
(d) P { i = i
k;
k; } For All (i=0; i<10) i+k > 0
Exists (k=0%; k<i) k+m > i

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