1. Is 34 too old to join as an officer ?
A. When I was a recruiting officer I once enrolled a 47-year-old as an officer - he finished first on his Basic Officer Training ... (so, even though 34 is older than the average age for newly enrolling officers, it isn‘t "too" old ... depending on how physically fit and mentally tough you are - you‘ll get sorted out during your training)
2. What is the medical like ? Iam healthy but shortsighted.
A. There are minimum enrolment standards, and then minimum standards for each military occupation/trade - as already mentioned, it is possible to be enrolled if you wear glasses (depending on how strong/weak your perscription is - you‘ll find out definitively during your medical examination)
3. How quick is promotion ?
A. It depends on a number of factors - i.e. you mentioned something about communications - if you mean Army "Signals" (vice public relations thingey) you‘d be a CELE - a reasonably healthy branch. The recruiting centre can explain the normal career progression (i.e. how long from Officer Cadet to Second Lieutenant - which might be accelerated if you‘ve already got your degree, and then to Lieutenant and Captain - these are fairly automatic, after a couple of years if I remember correctly - once you get beyond Captain it depends more on vacancies at Major and above, along with the inevitable politics ... but don‘t be discouraged - somebody I know has been a captain for eighteen years, but they say he‘s an okay guy ... chuckle)
4. Are Communications officers out in the field much ?
A. Depends on where you‘re posted (stationed) - if you‘re with a field unit, you‘ll get dirt under your fingernails - if you get a desk job, watch out for those killer paper cuts.
5. What is the average length of of an overseas posting ?
A. Well, once upon a time when we had bases overseas it was a different story. Today, however, the most common form of foreign vacation is a six month peacekeeping tour. There are also year-long tours, and sometimes there are "postings" to jobs which can last two or three years - however, these are normally highly coveted, and not doled out to junior communications weenies still wet behind their ears ...
6. How often in a career do officers move location ?
A. Depends how long a career you‘re talking about. Once upon a time, postings were usually three years long - sometimes two, or four as well. Today, the Army is a little smaller, so in order to fill a sudden vacancy or urgent requirement some people get posted after only one year, while others can remain for relatively long periods in a job if they‘re willing to stay and nobody else is willing to replace them ... (i.e. Toronto is a good example - not too many people want to be posted there, but sometimes there‘s somebody who‘s from there, or happy to stay a little longer for various reasons)
7. Can I live on a second lieutenant‘s salary ?
A. Depends upon your vices, the cost of living wherever they send you, and how quickly you blow your enrolment bonus (assuming you‘ve got an engineering degree).
8. Is field training limited due to lack of funds eg do Artillery fire live rounds frequently enough to stay sharp ?
A. That‘s a loaded question (pun intended) - the Army‘s budget seems to keep shrinking, and shrinking ... and there‘s no such thing as too much ammunition ...
9. How long does the selection process take ?
A. Others have already given up-to-date replies - depending on how eager you are, it will seem to take forever ... or else it will be the old Army adage "hurry up and wait" ...
candidates. There are also a few other serials a year for re-coursed people or Civilian university :crybaby: people. Talk to your recruiting center, they have all the info on dates etc... 
