Answered: a) “12abc” is a valid Atom name in…

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

1.True or False:

a) “12abc” is a valid Atom name in prolog.
b) “123” is a valid Integer name in prolog.
c) “_” is a valid variable name in prolog.
d) “_boy” is a valid Atom name in prolog.
e) _123 is a valid Variable name in prolog.
f) “xmen” is a valid Variable name in prolog.
g) “fred%nezar” is a valid Atom name in prolog.

2.What does Prolog return to the following queries?

a) sum (X+Y)= sum(2+3)
b) sum(2+3) =sum(X+Y)
c) sum(X) = sum(2+3)
d) sum(X+Y) = sum(3)
e) X is 2+3
f) X is 3+Y.
g) X = 3+5.
h) X is f(3+5).
i) X=Y
j) X=X

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