eed answer for D,E,F,G

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
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Need answer for D,E,F,G

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Step 1

Result of the following expressions:

Part d:

string1 > "maximum";

It will return 1 (or true) since string1 > "maximum"

Hence, it returns 1

Part e:

string3.substr(0,4) == "mini" || string1 == string2

The statement consists of two logical statements

First, string3.substr(0,4) == "mini"

The function string3.substr(0,4) will return first four characters of string 3 "mini" and matches against string "mini". Hence, condition is true.

Second, string1 == string2 will evaluate to false since both strings are not the same.

Now logical OR of true and false is TRUE.

Hence, it returns 1

Part f:

string3.length() > string1.length() && string1 > string3

The first condition string3.length() > string1.length() evaluates to FALSE but another condition string1 > string3 evaluates to true. The logical AND of FALSE and TRUE is FALSE.

Hence, the result is 0

Part g:

!((string1.substr(8,1) == string3.substr(8,1)) && string1.length() == 9)

The boolean statement ((string1.substr(8,1) == string3.substr(8,1)) && string1.length() == 9) evaluate to true but negation of TRUE that is !(TRUE) is false.

Hence, it returns 0.

 

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