(public).sospep.systems ~ view step ~ question-features

<h2>question</h2>
<ol>
<li>]&nbsp;What are global variables? How are these variables declared and what are the problems associated with using them?</li>
</ol>
<h2>question-category</h2>
<ol>
<li>] FEATURES</li>
</ol>
<h2>answer(source)</h2>
<ol>
<li>] Global variables are those that are available throughout the length of the code, that is, these have no scope. The var keyword is used to declare a local variable or object. If the var keyword is omitted, a global variable is declared.</li>
<li>] Example: // Declare a global globalVariable = &ldquo;Test&rdquo;;</li>
<li>] The problems that are faced by using global variables are the clash of variable names of local and global scope. Also, it is difficult to debug and test the code that relies on global variables.</li>
</ol>
<h2>answer(me)</h2>
<ol>
<li>- variables that are accessible from any code in your application. They have global scope.</li>
<li>- declared outside of any function in your script</li>
<li>- problems</li>
<li>--&nbsp;is that they are accessible to any code</li>
<li>-- muteable - many different functions can access/set/change the values of these variables,</li>
<li>-- namespace pollution</li>
</ol>
<h2>source</h2>
<ol>
<li>[2015-06-30] google qry= <strong>"javascript interview questions"</strong></li>
<ol>
<li>r# 5] <a href="http://career.guru99.com/top-85-javascript-interview-questions/" target="_blank">top 85 javascript interview questions</a> - @career.guru99.com - question 11</li>
</ol></ol>
<h2>reference</h2>
<ol>
<li><strong>[2015-05-30] NEW article IN tech-dev-www/language-js/index</strong></li>
<ol>
<li>x] # <a href="/view/article?id=4560" target="_blank">4560 - javascript interview - questions and answers</a> - A listing of 85 javascript interview questions by careerguru.com, with answers by Don Sagrott</li>
</ol>
<li><strong>[2015-08-10] NEW article</strong></li>
<ol>
<li>x] # <a href="/view/article?id=4616" target="_blank">4616 - LIST-javascript-interview-questions categories</a>&nbsp;-&nbsp;A listing of all of the differenct javascript interview question categories,</li>
</ol></ol>

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