<div>
This is the second question of yours that also sounds a lot like a homework or exam question.<br />
<br />
If so we can only provide general guidance.<br />
<br />
Please clarify.
</div>


This is the second question of yours that also sounds a lot like a homework or exam question.

If so we can only provide general guidance.

Please clarify.

<div>
<div class="content wysiwyg-content">
a sequential file contains 50,000 records, and 5 milliseconds are required to interrogate an entry. How long should we expect to wait when retrieving a record from the middle of the file?<br />

</div>
</div>


a sequential file contains 50,000 records, and 5 milliseconds are required to interrogate an entry. How long should we expect to wait when retrieving a record from the middle of the file?


Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.

Oracle Database

Sybase, a subsidiary of SAP, builds a client/server relational database management system. Products include Adaptive Server Enterprise (ASE), Adaptive Server Anywhere (ASA), Sybase Unwired Platform (SUP) for mobile applications, Afaria for enterprise mobile device management and IQ for data warehouse and big data applications.

Sybase Database

SQL (Structured Query Language) is designed to be used in conjunction with relational database products as of a means of working with sets of data. SQL consists of data definition, data manipulation, and procedural elements. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control.