display interview questions

Top display frequently asked interview questions

Connecting 2 External Monitors to a Laptop?

Equaling 3 Displays Total (or 2, if the laptop display cannot be used).

I work at home on two large monitors, but at the office on a laptop with a single large monitor. Is it possible to attach two (or more?) external monitors to a laptop without having them clone each-others display?

Source: (StackOverflow)

Turn off display in Windows on command

Is there a way to turn off the display in Windows (7), preferably without using additional software?

Powershell script works fine, but leaves command-line window after turning on the display.

Source: (StackOverflow)

Displaying XML in the Chrome browser

I love the Chrome browser, but I use XML quite a lot in my development work and when I view it in Chrome I just get the rendered text.

I know that the source view is slightly better, but I'd really like to see the layout and functionality that Internet Explorer adds to XML, namely:

  • Highlighting
  • Open/close nodes

Any ideas how I can get this on Chrome?


The XMLTree Extension is available on Google Chrome Extension Beta Site.

Source: (StackOverflow)

Why does text look so Horrible on my HD monitor?

I just bought a 1080p 22" Samsung Syncmaster 2333HD (connected via HDMI) and the picture and video quality is great but the text quality is absolutely horrible. This monitor has a built in HD TV tuner.

Even as I type now all the text in this text box as well as in the browser toolbar and start menu, etc looks weird - like it all has a white outline around it that makes it jagged and hard to read. It hurts my eyes just to look at it.

I am running my PC in the suggested native resolution of 1920x1080, so what's the problem?

Is this one of the unavoidable downsides of using a HD monitor? Is there a solution to the problem?

Source: (StackOverflow)

Generating usage logs that prove my Internet connection is flaky

I need a way to generate reports or logs that prove that my Internet connection is flaky. My Comcast connection is very flaky but if I ask their support to send someone over it will probably work fine while the guy is here.

I found and tried "Connection Monitor" from CSGWare Corp but it does not create the kind of reports or graphs I'd need to be able to convince my ISP that their link is intermittent.

What I need to be able to do is have the software monitor my connection and produce a record of when the connection dies or when, for example, ping time climbs dramatically.

Can I get Connection Monitor to do this or is there another program that does?

Source: (StackOverflow)

Triple (3) Monitors under Linux

I have a 3 monitor setup (each 1680x1050) via an Nvidia NVS440 (2 GPUs, 2 outputs per GPU totalling 4 outputs); this works fine under Windows XP,7 but caused considerable headaches under Linux (Ubuntu 9.04).

I had previously used an XFX 9600GT and the onboard XFX 9300GS to produce the same result but the card was noisy and power hungry and I was hoping that there was some magical switch in the NVS4400 that got rid of this annoying problem - turns out the NVS440 is just 2 cards on one physical PCB :-p (I searched the net high and low for people using this card under Linux but found nothing, if anything the card uses less power and is fan less so I was to benefit from it either way)

Anyway, using either set up there were 5 solutions available:

  • Have 3 separate X instances, all un joined
  • Have 3 separate X instances, adjoined by Xinerama
  • Have 2 separate X instances - One using twin-view, both adjoined by Xinerama
  • Have 2 separate X instances - One using twin-view but no Xinerama
  • Have a single Twin-view setup and leave the 3rd screen unplugged :-p

The 4rd option, using 2 separate X instances and twinview (but no xinerama) was the best balance in terms of performance and usability but caused 2 really annoying issues

  • You couldn't control (without altering the shortcuts) which screen an application opened onto - and once it was opened you couldn't move it to another screen without opening up terminal and forcing it to move
  • Nvidia's overriding or falsifying of Xinerama breaks and the 2 screens joined by Twin view behave like a single huge screen causing popups to open in the middle of both screens and maximising of windows stretches to the width of the first 2 screens
  • Firefox can only run one instance as the same user so having multiple firefox windows requires at least 2 users

The second option "feels" like the right option, but OpenGL is basically disabled and playing any sort of game or even running anything graphical causes a huge performance drop and instability - even trying to run a basic emulator for gba or gens just causes the system to fall over. It works just enough to stare at your desktop and do nothing but as soon as you start doing some work - opening windows, dragging things around - running multiple copies of firefox it just really feels slow.

The last open, only going dual screen works perfectly and everything performs as required, full GPU acceleration - two logical screen spaces - perfect, just make it work across GPUs like windows! :-p

Anyway, I know RandR was supposed to pick up the slack when it would introduced GPU objects of sorts to allow multiple GPUs to be stitched together to create one huge desktop at a much deeper layer than Xinerama. I was wondering if this has now been fixed (I noticed X server 1.7 is out) and whether anyone has got it running successfully?

Again, my requirements are:

  • One huge desktop to drag any window across
  • Maximising of windows to each screen (as XP does)
  • Running fullscreen apps on the primary screen and disabling the mouse from moving onto the others or on all 3 stretched

Finally as a side note; I am aware of the Matrox triple (and dual) head splitter but even the price they go for on eBay is more than I can afford atm, my argument: I shouldn't have to buy extra hardware to get something to work on Linux when it's something that's existed in the windows world for a long time (can you tell I don't get on with X :-p); If I had the cash I'd have bought the latest version of this box already (the new version finally supports large resolutions as the displays I have 1680x1050 each).

Source: (StackOverflow)

Is it possible to power on/off a monitor using the computer?

I was wondering if it was possible to power on/off a display using a computer connected via HDMI. Let me explain :

I want my computer to power off my monitors (not standby mode) when I don't use it (no keyboard/mouse input) for more than 15 minutes, and power them back when such input is received. My monitors are connected over HDMI, so I was wondering if it was possible to use the CEC functionality with a computer. If is it possible, then is there a hardware requirement ?

My point is that I often take a break from my computer, but forget to turn off the screens, and I would prefer to shut down the screens completely instead of putting them to standy mode

Thanks a lot

Source: (StackOverflow)

What are the advantages of 10-bit monitors?

To support 10-bit color the following are needed:

  • A monitor supporting it.
  • A GPU supporting it (only AMD FirePro and NVIDIA Quadro support this?).
  • Compatible software. Unless I am mistaken there are very few programs out there supporting 10-bit color. Photoshop is a notable example.

The questions are about how 10-bit monitors perform in comparison with 8-bit monitors:

  • In which situations would a 10-bit monitor give a noticeable advantage over an 8-bit monitor (say, for professional photography)?
  • Have 10-bit monitors been compared against 8-bit monitors based on subjective or objective tests? What were the results?
  • Human eyes can see only 10m colors, so would using a monitor with 1b colors make a difference?

Source: (StackOverflow)

How could I safely fix my walking "dead pixel" bug?

I need suggestions.

I've got a live little bug inside my macbook pro screen for 2 days now.

I've tried to film it using my iPhone, but it ain't that good. :(

Should I try to open it? o_O

C'mon, looking for ideas here! :)

edit: Here's an alike video.

It's not moving anymore for now... I hope it isn't dead! Right when I've found a possible solution along with many ideas on that link: suction cup; monitor off and lamp on to attract it out; scratching the screen (made it move a little); and got to know there's no warranty for this "feature" (also known as bad design in a jargon).

edit2: It's been "fixed" on its own. Just check the answer.

Source: (StackOverflow)

What did computers use for output before monitors?

How did the early industrial computers, such as UNIVAC, ENIAC, MARK I, etc display output before monitors existed?

Did the first personal computers, like the Altair 8800 or the Simon use monitors, or did they use some alternate output as well?

Source: (StackOverflow)

Turning DisplayPort monitor off disables monitor completely

I have 2 monitors connected to a NVIDIA GeForce GTX 660:

  • Left is 1920x1080 via DVI (Samsung SyncMaster 2443BW)
  • Right is 2560x1440 via DisplayPort and is set to Primary (Samsung SyncMaster SA850)

I often leave my computer running overnight (working on long render job, doing backups, etc) so I only power off my monitors manually. However, if I power off the primary monitor, it is disabled completely as if it were unplugged from the graphics card (i.e. icons are moved, open apps are moved and resized to fit on the new primary monitor). If I switch from DP to a DVI cable, this does not occur. It seems to be an issue when using DisplayPort.

Is there a way to disable the monitor from being disabled completely in Windows when I power it off physically?

I have found no relevant settings in either Windows Display settings, nor the NVIDIA control panel software.

Edit #1: I'm using an Oehlbach Transdata DP 510 cable.

Edit #2: Here is a screenshot of my NVIDIA Control Panel v7.2.710.0: enter image description here

Edit #3: Here are screenshots of my Monitor configuration:

enter image description here

Clicking on Advanced settings reveals a Generic PnP monitor running at 59 Hz? 60 Hz is the only other option available.

enter image description here

Here is my secondary monitor which is connected via DVI:

enter image description here

Edit #4: If I open the "Screen Resolution" configuration panel and power the monitor off (via the power switch), this is what is shown:

enter image description here

It looks like I disconnected the monitor from the video card.

Source: (StackOverflow)

Can I sleep one of the displays on a multi-monitor setup?

I want to be able to 'put the display to sleep' on one of my two monitors when it isn't needed, so it doesn't distract me or use unnecessary power.

Ideally, the display would be asleep, but the OS would remain in dual-monitor mode, so I could still have a variety of windows open in the sleeping monitor's display space, which would mean I wouldn't have to keep switching between single- and dual-monitor modes.

That said, I'd also consider a solution that made it easy to toggle between single- and dual-monitor modes without navigating several system menus.

Source: (StackOverflow)

How can I display the Windows 8 Start Screen on a secondary monitor?

Is there a way to get Windows 8 to use my secondary monitor for the start screen?

Source: (StackOverflow)

Is an LED monitor better for eyes than an LCD monitor?

Is an LED monitor better for eyes than an LCD monitor?

EDIT: And if you are allergic to fluorescent light, is LED going to be better? I heard that LED doesn't uses fluorescent light.

Source: (StackOverflow)

Is VGA port hot-pluggable?

In meetings, I often see people detaching the VGA connector from one running laptop and connecting it to another, while the projector is still on.

Is this 100% risk free, and OK by design of the VGA standard? If there's a risk involved in hot-plugging VGA, can it be removed by turning off or suspending either laptop, display, or both?

I see this being done all the time without causing disaster, so clearly I'm not interested in answers stating "we do it all the time, so it should be OK!".

I want to know if there's a risk - real or in theory - that something breaks when doing this.

EDIT: I did an internet search on the topic, and I never found a clear statement as to why it is safe or unsafe to hot swap VGA devices. The typical form is a forum question asking basically the same question as I did, and the following types of statements

  • Yes it's hot swappable! I do it all the time!
  • It involves some kind of risk, so don't do it!
  • You're some kind of moron if you think there's a risk, so just do it!

But no explanation as to why it safe or not...

Joe Taylors answer below contains a link to a forum post and answers that basically give me the same statements as mentioned above. But again, no good explanation why.

So I looked for an actual manual for a projector, and found "Lenovo C500 Projector User’s Guide". It states on page 3-1:

Connecting devices

Computers and video devices can be connected to the projector at the same time. Check the user’s manual of the connecting device to confirm that it has the appropriate output connector.


Attention: As a safety precaution, disconnect all power to the projector and devices before making connections.

But again, no good explanation.

Source: (StackOverflow)