CompTIA Training Classes in Sandy Springs, Georgia
Learn CompTIA in Sandy Springs, Georgia and surrounding areas via our hands-on, expert led courses. All of our classes either are offered on an onsite, online or public instructor led basis. Here is a list of our current CompTIA related training offerings in Sandy Springs, Georgia: CompTIA Training
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2 May, 2024 - 3 May, 2024 - DOCKER WITH KUBERNETES ADMINISTRATION
6 May, 2024 - 10 May, 2024 - Enterprise Linux System Administration
10 June, 2024 - 14 June, 2024 - VMware vSphere 8.0 with ESXi and vCenter
10 June, 2024 - 14 June, 2024 - Go Language Essentials
29 July, 2024 - 1 August, 2024 - See our complete public course listing
Blog Entries publications that: entertain, make you think, offer insight
I will begin our blog on Java Tutorial with an incredibly important aspect of java development: memory management. The importance of this topic should not be minimized as an application's performance and footprint size are at stake.
From the outset, the Java Virtual Machine (JVM) manages memory via a mechanism known as Garbage Collection (GC). The Garbage collector
- Manages the heap memory. All obects are stored on the heap; therefore, all objects are managed. The keyword, new, allocates the requisite memory to instantiate an object and places the newly allocated memory on the heap. This object is marked as live until it is no longer being reference.
- Deallocates or reclaims those objects that are no longer being referened.
- Traditionally, employs a Mark and Sweep algorithm. In the mark phase, the collector identifies which objects are still alive. The sweep phase identifies objects that are no longer alive.
- Deallocates the memory of objects that are not marked as live.
- Is automatically run by the JVM and not explicitely called by the Java developer. Unlike languages such as C++, the Java developer has no explict control over memory management.
- Does not manage the stack. Local primitive types and local object references are not managed by the GC.
So if the Java developer has no control over memory management, why even worry about the GC? It turns out that memory management is an integral part of an application's performance, all things being equal. The more memory that is required for the application to run, the greater the likelihood that computational efficiency suffers. To that end, the developer has to take into account the amount of memory being allocated when writing code. This translates into the amount of heap memory being consumed.
Memory is split into two types: stack and heap. Stack memory is memory set aside for a thread of execution e.g. a function. When a function is called, a block of memory is reserved for those variables local to the function, provided that they are either a type of Java primitive or an object reference. Upon runtime completion of the function call, the reserved memory block is now available for the next thread of execution. Heap memory, on the otherhand, is dynamically allocated. That is, there is no set pattern for allocating or deallocating this memory. Therefore, keeping track or managing this type of memory is a complicated process. In Java, such memory is allocated when instantiating an object:
String s = new String(); // new operator being employed String m = "A String"; /* object instantiated by the JVM and then being set to a value. The JVM calls the new operator */
It is hard not to wonder how current technology would have altered the events surrounding the tragic death of John F. Kennedy. On the afternoon of November 22, 1963, shots rang out in Dallas, TX, taking the life of JFK, one of the most beloved Americans. Given the same circumstances today, surely the advances in IT alone, would have drastically changed the outcome of that horrible day. Would the government have recognized that there was a viable threat looming over JFK? Would local and government agencies have been more prepared for a possible assassination attempt? Would the assortment of everyday communication devices assisted in the prevention of the assassination, not to mention, provided greater resources into the investigation? With all that the IT world has to offer today, how would it have altered the JFK tragedy?
As many conspiracy theories have rocked the foundation of the official story presented by government agencies, realization of the expansive nature of technology provides equal consideration as to how the event would have been changed had this technology been available during the time of the shooting. There were T.V. cameras, home 8mm recorders, even single shot-hand held cameras snapping away as the car caravan approached. Yet, there remains little documentation of the shooting and even less information pertaining to the precautions taken by officials prior to JFK's arrival. Theorists consider these possibilities along with how the world would have turned out had the great John F. Kennedynever been assassinated on that day.
Like me, I believe most people go about their business never to give a serious thought about their assumed private correspondence when using Gmail to email friends, colleagues and business associates. As it turns out, your daily banter may not be so private after all. A recent article in Fortune Magazine, “Judge Rejects Google Deal Over Email Scanning” caught my attention and an immediate thought dominated my curiosity…Google email and scanning scam.
In essence, the article describes Googles’ agreement to change the way it scans incoming messages so that it no longer reads emails while they are in transit, but only when they are in someone's inbox! So, what exactly does that mean? Judge Koh, a San Francisco federal judge, said she's not so sure about that. Her ruling claims the settlement does not provide an adequate technical explanation of Google's workaround, which involves scanning in-transit emails for security purposes, and then later parsing them for advertising data. The judge also proposed a legal settlement to pay $2.2 million to lawyers, but nothing to consumers.
My interest in this story is not so much about the proposed settlements or the specific details about how Google or any of the web giants settle claims based on vague legal language. It is however, more about the naiveté of myself and perhaps many others that never question how the email scanning process really works. I wonder, do most of us really care that Gmail uses contents of our mail to display targeted ads?
It is rather unfortunate that in the ever changing and rapidly improving world of technology, we hardly remember the geniuses who through their inventions laid the foundation for many of the conveniences and features we now enjoy in our favorite communication devices.
This article is a tribute to the ten people who made these discoveries and an attempt to bring their achievements into the limelight.
1. Marty Cooper
Did you know that Cooper was the first to file the patent in 1973, when he was already working for Motorola for the “radio telephone system”. The Cooper’s Law is his brainchild and to think that he himself was inspired to come out with the patent was Star Trek and its Captain Kirk is indeed revealing.
2. Mike Lazardidis
Tech Life in Georgia
Company Name | City | Industry | Secondary Industry |
---|---|---|---|
BlueLinx Corporation | Atlanta | Real Estate and Construction | Construction Equipment and Supplies |
Equifax, Inc. | Atlanta | Business Services | Business Services Other |
Asbury Automotive Group, Inc. | Duluth | Retail | Automobile Dealers |
Flowers Foods, Inc. | Thomasville | Manufacturing | Food and Dairy Product Manufacturing and Packaging |
Graphic Packaging Holding Company | Marietta | Manufacturing | Paper and Paper Products |
NCR Corporation | Duluth | Computers and Electronics | Networking Equipment and Systems |
Genuine Parts Company | Atlanta | Wholesale and Distribution | Automobile Parts Wholesalers |
Delta Air Lines, Inc. | Atlanta | Travel, Recreation and Leisure | Passenger Airlines |
Carter's Inc | Atlanta | Manufacturing | Textiles, Apparel and Accessories |
Mohawk Industries, Inc. | Calhoun | Manufacturing | Textiles, Apparel and Accessories |
Synovus Financial Corp. | Columbus | Financial Services | Investment Banking and Venture Capital |
Home Depot USA , Inc | Atlanta | Retail | Hardware and Building Material Dealers |
Global Payments Inc. | Atlanta | Financial Services | Financial Services Other |
AGL Resources, Inc. | Atlanta | Energy and Utilities | Gas and Electric Utilities |
ROCK-TENN COMPANY | Norcross | Manufacturing | Paper and Paper Products |
Southern Company | Atlanta | Energy and Utilities | Gas and Electric Utilities |
AGCO Corporation | Duluth | Manufacturing | Farming and Mining Machinery and Equipment |
First Data Corporation | Atlanta | Financial Services | Credit Cards and Related Services |
Acuity Brands, Inc. | Atlanta | Retail | Retail Other |
Exide Technologies | Milton | Manufacturing | Manufacturing Other |
TSYS Corporation | Columbus | Financial Services | Financial Services Other |
SunTrust Banks, Inc. | Atlanta | Financial Services | Banks |
The Coca-Cola Company | Atlanta | Manufacturing | Nonalcoholic Beverages |
United Parcel Service, Inc. - UPS | Atlanta | Transportation and Storage | Postal, Express Delivery, and Couriers |
AFLAC Incorporated | Columbus | Financial Services | Insurance and Risk Management |
Newell Rubbermaid Inc. | Atlanta | Manufacturing | Paper and Paper Products |
training details locations, tags and why hsg
The Hartmann Software Group understands these issues and addresses them and others during any training engagement. Although no IT educational institution can guarantee career or application development success, HSG can get you closer to your goals at a far faster rate than self paced learning and, arguably, than the competition. Here are the reasons why we are so successful at teaching:
- Learn from the experts.
- We have provided software development and other IT related training to many major corporations in Georgia since 2002.
- Our educators have years of consulting and training experience; moreover, we require each trainer to have cross-discipline expertise i.e. be Java and .NET experts so that you get a broad understanding of how industry wide experts work and think.
- Discover tips and tricks about CompTIA programming
- Get your questions answered by easy to follow, organized CompTIA experts
- Get up to speed with vital CompTIA programming tools
- Save on travel expenses by learning right from your desk or home office. Enroll in an online instructor led class. Nearly all of our classes are offered in this way.
- Prepare to hit the ground running for a new job or a new position
- See the big picture and have the instructor fill in the gaps
- We teach with sophisticated learning tools and provide excellent supporting course material
- Books and course material are provided in advance
- Get a book of your choice from the HSG Store as a gift from us when you register for a class
- Gain a lot of practical skills in a short amount of time
- We teach what we know…software
- We care…