Solved

Expansion

Posted on 1998-11-09
3
142 Views
Last Modified: 2010-04-27
Why do exe files have signature "MZ" ?      What is the expansion for "MZ" ?
0
Comment
Question by:jameen
3 Comments
 

Expert Comment

by:Nanos
ID: 1012271
Please explain more on what you mean.. what is this signature?
0
 
LVL 10

Accepted Solution

by:
MasseyM earned 100 total points
ID: 1012272
The MZ are initials fo one of Microsoft's lead programmers that was instrumental in the compilation of code.  

Check this article:
http://www-personal.monash.edu.au/~damcc5/doswin/dosexec.htm
0
 
LVL 3

Expert Comment

by:vikiing
ID: 1012273
As Massey said, they're the initials of the guy's name who worked on that matter at Microstuff (some centuries ago).

The main purpose of those letters "MZ" that appear as the two first bytes of every .EXE file, is to differentiate the .EXE from a .COM file.

Althoug both of them are binary files, and whose contents are intended to be executed directly by the machine (in fact, both of them contain binary instructions understood by the processor), they receive different treatment. A real .EXE file is slightly different from a .COM

If you RENAME a .COM file as if it were a .EXE, operating system ignores that fact, 'cause it doesn't regard of extension itself (.COM / .EXE). When file is loaded into memory, op.sys. checks the first two bytes, if they are "MZ", file is treated as a .EXE one; if not, file is treated as .COM


0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Device same like our heart 12 75
Can not play a CD from the D drive 31 71
amazon fire stick 3 44
Multiple times a day Computer loses internet connection 17 38
Stuck in voice control mode on your Amazon Firestick?  Here is how to turn it off!!!
Great sound, comfort and fit, excellent build quality, versatility, compatibility. These are just some of the many reasons for choosing a headset from Sennheiser.
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.
Concerto provides fully managed cloud services and the expertise to provide an easy and reliable route to the cloud. Our best-in-class solutions help you address the toughest IT challenges, find new efficiencies and deliver the best application expe…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now