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  • Is there a difference between multi-tasking and time-sharing?

    - by Dummy Derp
    Just going over my school notes, my teacher identifies multi-tasking OS, and time-sharing OS as two different things. I really don't see a difference between the two. MULTI-TASKING: You load a number of programs in the memory and execute them. You execute another program if the time quantum allocated to the current program expires OR if it goes on to do I/O and leaves the CPU OR if it finishes execution. TIME-SHARING: the same,again. The same applies in case of serial processing and batch processing. Although they are the same, I guess the only difference would be the way in which control information is passed to the CPU. Maybe, and again MAYBE, in serial processing you need to provide the punch cards with all the processes while in batch, the entire batch uses the same set of control information. Like all the print jobs would have the same control information.

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  • Dedicated Servers: Is one better then two for LAMP pseudo HA setup? [closed]

    - by bikedorkseattle
    Possible Duplicate: How to find web hosting that meets my requirements? I know there are zillions of commentary about hosting out there, but I haven't read much about this. Our current well known host is having too many problems, the hardware we are on it subpar, and I'm ready to leave. A day of downtime can cost as much as our monthly hosting bill. A month of bad performance is just killing us right now, user and google wise. I'm wondering about running two dedicated boxes for LAMP, one running as the primary Nginx/Apache (proxy pass), and the other as the MySQL box. Running a single box scares the bejesus out of me because who knows how long it will take anyone to fix a raid card or whatever. The idea is to set this up using some sort of failover system using pacemaker and heartbeat. If one server goes down the other can take over for the other running both web and db. There are some good articles over at Linode about this. I have a few DBs that are 1GB+ and would like to load them into memory. Because of this, I'm shying away from a Linode HA setup because for the price I could do it with two dedicated like I described. Am I mad or an idiot? What are people out there doing for pseodu high availability good performance setups under $400/month? I'm a webmaster; I do a lot of things none of it that well :)

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  • How do I find fun companies?

    - by the_great_monkey
    When looking for jobs, I'm not sure how to determine whether the company is fun to work for or not. I want to work in companies that are open, innovative, and make a good contribution to the world of computer science. For example, Dropbox looks like a very fun company and its existence is very important. How do I spot this in job advertisements? EDIT: I should note that I live in Australia, so many of the fun companies that I know does not have any office here. I know only a handful of fun companies in Australia – including Google in Sydney. But I don't know that many.

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  • Au tour d'Opera de s'en prendre au Flash en l'accusant d'être une technologie fermée et trop gourman

    Mise à jour du 07/05/10 Au tour d'Opera de s'en prendre au Flash En l'accusant d'être une technologie fermée et trop gourmande en ressources C'est un peu comme si Steve Jobs avait enfilé un masque de norvégien pour répondre à une interview. Pour Phillip Grønvold, analyste chez l'éditeur du navigateur Opera, Flash est une technologie fermée. Flash consomme trop de ressources. Flash c'est le passé et le présent du Web. Pas son futur (contrairement au HTML 5). « Aujourd'hui, les contenus webs sont dépendants du Flash. [?] Nous essayons de procurer la meilleure expérience du Net à nos utilisateurs, donc on a besoin du Flash [?] ...

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  • Flash vs. l'HTML5 : lequel est le plus performant ? Aucun, selon un expert américain

    Mise à jour du 10.03.2010 par Katleen Flash vs. l'HTML5 : lequel est le plus performant ? Aucun, selon un expert américain L'utilité de Flash est âprement discutée ces dernières semaines, suite au refus catégorique de Steve Jobs d'implémenter cette technologie dans ses derniers produits : l'iPad et l'iPod Touch. Les fanboys d'Apple suivent leur maître et, comme lui, ils considèrent Flash comme un dévoreur de CPU nuisible pour la longévité des batteries. Flash a alors tout de la bête noire. Pourtant, de récentes études l'ont comparé à l'HTML5. Et les résultats sont?innatendus. Du moins, pour les détracteurs de Flash. Flash est en effet...

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  • Career Shifters: How to compete with IT/ComSci graduates

    - by CareerShifter
    I am wondering what are the chances of a career shifter (mid 20's), who have maybe 3-6 months programming experience vs. younger fresh IT/Com Sci graduates. You see, even though I really love programming (Java/J2EE), but nobody gives me a feedback when I apply online. maybe because they preferred IT/ComSci graduates vs a career shifter like me.. So can you advice on how to improve my chance on being hired. How can i get a real-job programming experince if nobody is hiring me. I can make my own projects (working e-commerce site blah blah) but it is still different from the real job. And my codes are working but it still needs a lot of improvement and no one can tell me how to improve it because no one sees it (because I'm doing it alone?). Do you know any open source websites (java/j2ee/jee) / online home-based jobs who accepts java/j2ee/jee trainees.. Thank you very much

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  • I hyperlinked a cell in excel 2003, formula issues?

    - by joseinsomniac
    I have a budget spreadsheet using excel 2003. I have My deposit, then all of my bills, the total, then a cell that has the difference(between the amount of deposit and the total of the bills). The difference cell numbers turn red when I dont have enough money (deposit vs bill total). I hyperlinked the difference cell to a checkbook register spreadsheet so I can track where all my extra money went(reconsile receipts daily). When hyperlinked the numbers are blue. I need the numbers to stay black(when above 0.00) and stay red (when the numbers are below 0.00) and not change after the link has been clicked on. Also if the link has not been clicked on, and the numbers are red, the font is smaller, even though the toolbar shows the font size hasnt changed. After I click on it and go back to the budget sheet, its the size it should be. Any Ideas? Thanks!

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  • Is this a bad time to be majoring in computer science?

    - by ATMathew
    There has been a lot of media attention paid in recent months and years to the increase in CS majors and the possibility of a second tech bubble. Some news reports have suggested that as more people enter CS, the market could be flooded with CS professionals and jobs could be increasingly difficult to find. Is this a bad time to be majoring in computer science? Edit: I'm a non-trad student who allready has a Bachelor's degree in economics and will be pursuing a CS degree starting this upcoming summer semester at the Univ of Kansas. I've been programming for about two/three years and just need a more formal education to fill the holes in my head. I have an interest in CS, it's just that I am worries about the prospects for the future.

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  • Inside Red Gate - Be Reasonable!

    - by simonc
    As I discussed in my previous posts, divisions and project teams within Red Gate are allowed a lot of autonomy to manage themselves. It's not just the teams though, there's an awful lot of freedom given to individual employees within the company as well. Reasonableness How Red Gate treats it's employees is embodied in the phrase 'You will be reasonable with us, and we will be reasonable with you'. As an employee, you are trusted to do your job to the best of you ability. There's no one looking over your shoulder, no one clocking you in and out each day. Everyone is working at the company because they want to, and one of the core ideas of Red Gate is that the company exists to 'let people do the best work of their lives'. Everything is geared towards that. To help you do your job, office services and the IT department are there. If you need something to help you work better (a third or fourth monitor, footrests, or a new keyboard) then ask people in Information Systems (IS) or Office Services and you will be given it, no questions asked. Everyone has administrator access to their own machines, and you can install whatever you want on it. If there's a particular bit of software you need, then ask IS and they will buy it. As an example, last year I wanted to replace my main hard drive with an SSD; I had a summer job at school working in a computer repair shop, so knew what to do. I went to IS and asked for 'an SSD, a SATA cable, and a screwdriver'. And I got it there and then, even the screwdriver. Awesome. I screwed it in myself, copied all my main drive files across, and I was good to go. Of course, if you're not happy doing that yourself, then IS will sort it all out for you, no problems. If you need something that the company doesn't have (say, a book off Amazon, or you need some specifications printing off & bound), then everyone has a expense limit of £100 that you can use without any sign-off needed from your managers. If you need a company credit card for whatever reason, then you can get it. This freedom extends to working hours and holiday; you're expected to be in the office 11am-3pm each day, but outside those times you can work whenever you want. If you need a half-day holiday on a days notice, or even the same day, then you'll get it, unless there's a good reason you're needed that day. If you need to work from home for a day or so for whatever reason, then you can. If it's reasonable, then it's allowed. Trust issues? A lot of trust, and a lot of leeway, is given to all the people in Red Gate. Everyone is expected to work hard, do their jobs to the best of their ability, and there will be a minimum of bureaucratic obstacles that stop you doing your work. What happens if you abuse this trust? Well, an example is company trip expenses. You're free to expense what you like; food, drink, transport, etc, but if you expenses are not reasonable, then you will never travel with the company again. Simple as that. Everyone knows when they're abusing the system, so simply don't do it. Along with reasonableness, another phrase used is 'Don't be an a**hole'. If you act like an a**hole, and abuse any of the trust placed in you, even if you're the best tester, salesperson, dev, or manager in the company, then you won't be a part of the company any more. From what I know about other companies, employee trust is highly variable between companies, all the way up to CCTV trained on employee's monitors. As a dev, I want to produce well-written & useful code that solves people's problems. Being able to get whatever I need - install whatever tools I need, get time off when I need to, obtain reference books within a day - all let me do my job, and so let Red Gate help other people do their own jobs through the tools we produce. Plus, I don't think I would like working for a company that doesn't allow admin access to your own machine and blocks Facebook! Cross posted from Simple Talk.

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  • What should I think about when switching from Python to Java?

    - by Nick Rosencrantz
    I was a Java developer in the early 2000s, switched to Python in 2008 and now Iäm working in Java again. Is there anything special you think I should keep in mind when going back to a Java environment? I used to work with EJB 1.0, I didn't work with EJB 2.0 and now we have JPA instead. I'm comfortable programming in Java and my new job with Java is much better than my Python job even though Python is my favorite language the tools and others things about my Java job makes it much better. I found when I searched jobs that demand for Java developer was much greater than demand for Python programmers- do you have a similar experience? Thank you

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  • Tracking costs within one AWS account

    - by caius howcroft
    I have what I'm sure is a very common problem. Our company has many projects and groups working for different clients. We do a lot of our development work in the cloud and deploy our solutions there. We have a VPC set up that isolates projects from each other in their own subnet and that VPC is getting a hardware VPN connection back to HQ. We need to keep track of the cost run up by every project. The way I currently implement this is by providing my own tools for starting and stopping instances which log which user (and thus which project) to bill the instance too. This works okay for BoxUsage costs but not for other costs. I could create a separate account for each project and use consolidated billing, this I think would allow me to pay once but track costs per "project", but I would then not be able to share common resources (like bring account B's running instances inside the same VPC). Does anyone have any suggestions? Cheers C

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  • Copying partial cell to another cell in OpenOffice Calc

    - by Justin
    Cell A1 says 0001 John Smith Cell A2 says 0002 Bill Snyder I want to basically split this, so one column just shows the numbers (0001, 0002, etc.) and then another column just shows the name. The first part is easy. Using the function "=LEFT(A1;4)" I can get 0001. How can I grab the name? Using "RIGHT(A1;99)", for example, will grab the entire string "0001 John Smith". Since each name is different in length, I'm not sure what to do. Can I somehow tell it to grab the whole string EXCEPT the first 4 characters? Or somehow tell it to grab the last 2 WORDS instead of a number of characters like it's asking?

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  • How to write efficient code despite heavy deadlines

    - by gladysbixly
    I am working in an environment wherein we have many projects with strict deadlines on deliverables. We even talk directly to the clients so getting the jobs done and fast is a must. My issue is that i'd always write code for the first solution that comes to my mind, which of course I thought as best at that moment. It always ends up ugly though and i'd later realize that there are better ways to do it but can't afford to change due to time restrictions. Are there any tips by which I could make my code efficient yet deliver on time?

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  • Best language or tool for automating tedious manual tasks [closed]

    - by Jon Hopkins
    We all have tasks that come up from time to time that we think we'd be better off scripting or automating than doing manually. Obviously some tools or languages are better for this than others - no-one (in their right mind) is doing a one off job of cross referencing a bunch of text lists their PM has just given them in assembler for instance. What one tool or language would you recommend for the sort of general quick and dirty jobs you get asked to do where time (rather than elegance) is of the essence? Background: I'm a former programmer, now development manager PM, looking to learn a new language for fun. If I'm going to learn something for fun I'd like it to be useful and this sort of use case is the most likely to come up.

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  • Asking potential developers to draw UML diagrams during the interview

    - by DotnetDude
    Our interview process currently consists of several coding questions, technical questions and experiences at their current and previous jobs. Coding questions are typically a single method that does something (Think of it as fizzbuzz or reverse a string kind of question) We are planning on introducing an additional step where we give them a business problem and ask them to draw a flowchart, activity, class or a sequence diagram. We feel that our current interview process does not let us evaluate the candidate's thinking at a higher level (which is relevant for architect/senior level positions). To give you some context, we are a mid size software company with around 30 developers in the team. If you have this step in your interview process, how has it improved your interviewing veracity? If not, what else has helped you evaluate the candidates better from a technical perspective.

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  • How to write efficient code despite heavy deadlines

    - by gladysbixly
    Hi all, I am working in an environment wherein we have many projects with strict deadlines on deliverables. We even talk directly to the clients so getting the jobs done and fast is a must. My issue is that i'd always write code for the first solution that comes to my mind, which of course I thought as best at that moment. It always ends up ugly though and i'd later realize that there are better ways to do it but can't afford to change due to time restrictions. Are there any tips by which I could make my code efficient yet deliver on time?

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  • How should I start refactoring my mostly-procedural C++ application?

    - by oob
    We have a program written in C++ that is mostly procedural, but we do use some C++ containers from the standard library (vector, map, list, etc). We are constantly making changes to this code, so I wouldn't call it a stagnant piece of legacy code that we can just wrap up. There are a lot of issues with this code making it harder and harder for us to make changes, but I see the three biggest issues being: Many of the functions do more (way more) than one thing We violate the DRY principle left and right We have global variables and global state up the wazoo. I was thinking we should attack areas 1 and 2 first. Along the way, we can "de-globalize" our smaller functions from the bottom up by passing in information that is currently global as parameters to the lower level functions from the higher level functions and then concentrate on figuring out how to removing the need for global variables as much as possible. I just finished reading Code Complete 2 and The Pragmatic Programmer, and I learned a lot, but I am feeling overwhelmed. I would like to implement unit testing, change from a procedural to OO approach, automate testing, use a better logging system, fully validate all input, implement better error handling and many other things, but I know if we start all this at once, we would screw ourselves. I am thinking the three I listed are the most important to start with. Any suggestions are welcome. We are a team of two programmers mostly with experience with in-house scripting. It is going to be hard to justify taking the time to refactor, especially if we can't bill the time to a client. Believe it or not, this project has been successful enough to keep us busy full time and also keep several consultants busy using it for client work.

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  • How to indicate to a web server the language of a resource

    - by Nik M
    I'm writing an HTTP API to a publishing server, and I want resources with representations in multiple languages. A user whose client GETs a resource which has Korean, Japanese and Trad. Chinese representations, and sends Accept-Language: en, ja;q=0.7 should get the Japanese. One resource, identified by one URI, will therefore have a number of different language representations. This seems to me like a totally orthodox use of content negotiation and multiple resource representations. But when each translator comes to provide these alternate language representations to the server, what's the correct way to instruct the server which language to store the representation under? I'm having the translators PUT the representation in its entirety to the same URI, but I can't find out how to do this elegantly. Content-Language is a response header, and none of the request headers seem to fit the bill. It seems my options are Invent a new request header Supply additional metadata in a multipart/related document Provide language as a parameter to the Content-Type of the request, like Content-Type: text/html;language=en I don't want to get into the business of extending HTTP, and I don't feel great about bundling extra metadata into the representation. Neither approach seems friendly to HTTP caches either. So option 3 seems like the best way that I can think of, but even then it's decidedly non-standard to put my own specific parameters on a very well established content type. Is there any by-the-book way of achieving this?

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  • Upgrading HP DL185 G5 8LFF, is using a Dell J1520 4-Drop SATA Adapter possible?

    - by jpreed00
    The HP DL185 G5 8LFF model supports 8 3.5" drives and 1 optical drive. However, instead of the optical drive, I'd like to have 2x 2.5" drives instead. The problem is that the PSU has no more SATA power cables (even though the motherboard has 4 additional SATA data ports). The PSU does have a free 10-pin connector and it looks like the J1520 cable from Dell would fit the bill. Link to cable description Does anyone have any experience using these cables? Are they safe? Any other ideas for adding the disks to the server if I don't use the cable? Thanks!

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  • Is my client correct that I cannot take a vacation as a subcontractor? [closed]

    - by Rae Ann
    I have 2 clients who I do ongoing work for as a subcontractor. Both are sporadic and part-time. Company A sent me to a 3 day certification course out of state. The following week I was scheduled for a 3 day vacation. I warned company B three weeks prior to these events. During my training that Company A was paying for, Company B asked me to leave the training to workon something for them that needed immediate attention. I declined. However I made arrangements to work on it in the evening and in the early mornings after they threatened to take the work and all subsequent work for this client to someone else. I lost all networking and fun from that trip... The following week I was in Florida and was again asked to do more work on the project after the feedback from the client. The integrated product personnel would not cooperate/return any of our calls so I did the best I could. I turned in the work, explained the issue and then was gone for 3 hours. When I returned, all my access to the project had been revoked and after a week of my calls and emails I found out they replaced me. I sent an invoice 3 weeks ago and they tell me they owe me nothing because I did not do the whole project and they cannot bill the client for what I did, because they are billing for the second contractor who started over. I was told that they realize I was on vacation but as a subcontractor I lose the ability to just disappear. I was gone 3 hours! Is this normal, correct, legal?? Not only did they ruin my class and my vacation, but now they expect me to not demand payment? They ended our relationship and I was in the middle of another project of theirs too. They told me to immediately cease all work for them. How do I get paid for the work I have yet to invoice this month?

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  • Is age a factor when looking for internships? [closed]

    - by user786362
    Possible Duplicate: Is it ever too old to learn how to become a programmer? I'm 30 years old going back to school for a 2nd degree in Computer Science. I will be transferring to my local state university this fall and would like to know if my age will be a factor when applying for internships. I have already read a few threads about age and careers: Is it too late to start your career as a programmer at the age of 30? Does it matter that you started developing at 26? While it is reassuring to know that people are getting entry-level programming jobs at 30+, what about internships? Should I even bother with bigger companies like Google, Microsoft, or Apple? I know we have laws against age-discrimination but lets not pretend we live in a perfect world where everyone follows the rules.

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  • Cloud Computing in words of one syllable

    - by harry.foxwell(at)oracle.com
    A colleague of mine challenged me to describe Cloud Computing in words of one syllable so that even his 80-year-old mother-in-law could understand the concept.  Hmmmm...The Cloud lets you do all your work on the Web or on your own net. It lets you set up your own work; no one has to set it up for you.  When you need more disk space, the cloud makes it for you.  When you need more speed, the cloud adds more gear to make your jobs go fast.  You share the cloud with more than just your own work, and you just pay for what you use.  The cloud is not new; this type of work has been done for years; just the word is new.  Now you know what the cloud is.  Or not.

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  • Outlook Replies with Inline Comments

    - by BillN
    I have a user who uses Word as his e-mail editor. Often when replying to an e-mail, he'll insert his comments into the body of the original e-mail. Since he is using Word as the editor, these show as [User Name] Comment Text in a contrasting color. However, some users see the comments in their Outlook, and others do not. I've tried Selecting/DeSelecting Word as the e-mail editor on the recipients, and it does not seem to make a difference. We are using Exchange 2007 with Outlook 2003 and Outlook 2007 clients along with a few Entourage Clients. There does not seem to be a pattern related to which client is used, but Entourage seems to be more likely to have the problem. TIA, Bill

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  • Do hiring managers have a hard time accepting developers who have a "business look alike" personal app but are NOT entrepreneurs?

    - by shadesco
    Directly post graduation from University, I decided to build my own web app (Ease My Day) while waiting to get a job as a software Engineer. The reasons to build this app: Gain solid hands on software experience before hitting the job scene Providing a solution to a common problem Not sitting doing nothing while searching for jobs The app is Not an entrepreneurial tryout nor a business to be sold. Still throughout interviews I noticed that at the rate of 4 of each 5 interviews I pass through the app is being confused with a business and I am asked the same questions: Why did you build the business? Why do you want to stop the app? Do you want to sell the app? Knowing that I didn't build a business nor make any income from this application. Do candidates who take initiatives and like to craft their own apps on the side cause a red flag on the hiring manager's radar?

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  • Is it possible to route *.example.com to a single machine without registering extra domains?

    - by oligofren
    I would like to achieve something similar to what wordpress.com does - giving each user its own subdomain. user1.wordpress.com would in the VirtualHosts setup of Apache would have its DocRoot at /user/user1, for instance. Now, our hosting service provider takes a fee for creating a domain, and in our case this would mean a ridiculous number of domains with a matching price. After some googling on DNS I came over a description of a DNAME record. That seems to fit the bill precisely. Any reason why my service provider would not do this, or why I should not do this?

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