Answered: H3-(2-2) Basic Java Syntax…

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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H3-(2-2) Basic Java Syntax

Introduction to Java Programming.

-You can add //comments for a better understanding. explanation throw

-Explanation through with answers.

-Please answer without abbreviation.

-Make it clean and clear typing/writing.

Thank you.

19. The following Boolean expression:
(a && !a)
Will always give :
false
true
20. Given the following Java code, what will be the final value of variable r ?
int x=4, y=-4;
boolean r;
r=((x != y) && !(y == X));
true
false

Expert Solution

Step 1: Question 19

In this Boolean expression, a is a variable, and the expression contains both a and !a, which are opposites of each other.

If a is true, then !a is false, and if a is false, then !a is true. Therefore, the result of a && !a will always be false because AND operator results in true only if both the inputs are true.

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