I was wondring if u cud hlp me to clear few points about criminal record. I was a uk resident i lived there about ten year and i got convection in the uk and they cancelled my visa im n pakistan now and now i was thinking to come to aus on a student visa and im using my uk computer degree to apply for further edu in aus, My question is will they know that i have got convection in the uk even im applying from pak.I need help on that wt i need to do to not finding them out
It depends on what type of visa you are looking to obtain, but most visas (including most student visas) require you to not only disclose any criminal records, but also to obtain a police check from every country you have lived in over the last 10 years.
Having assisted many people to obtain 457 visas, 482 visas and Permanent Residency, my advice would be to be very open and up-front about your conviction. If you fail to declare a conviction and then it is uncovered at a later point you DEFINATELY will not get your visa granted/will have your visa cancelled.
The good news is that simply having a criminal record is not ground in itself to reject your visa application. Australian Immigration has to look at the nature of the conviction, how long it has been since you were convicted, if any custodial time was served (prison) and if there is a pattern of offences. Generally speaking, smaller convictions (such as for drink-driving, drunk and disorderly, minor drug possession, petty theft/shoplifting etc) will not preclude you from obtaining a visa if you disclose these up front. If however your conviction was for a 'serious criminal offence' (such as murder, rape, paedophillia etc) then it would be likely that your visa application would be rejected.
Either way, the best advice I think I could give you is to declare the conviction you have. Hopefully it's considered a small, inconsequential conviction and it won't effect your application.
Just to add to KoalaGirl's reply, all visas actually require you to disclose whether or not you have a police record. Including visitor visas. Most people don't know this, and most people don't disclose what they consider to be "minor" incidents. This does catch people out when they decide that Australia is the place to be and then they have to explain why they failed to declare police convictions previously.