SEO is ideally a continuous process but results can already be delivered within 3-6 months.

Its unpredictable because of the often changes. What are you referring to? rankings?

Check the Google cache (text version) to see If your link/URL exist.

If you find your link on the Google cache, Google knows about the link.

No one can tell you about that. SEO result time differs from site to site. Some sites rank very soon and some takes a long time.

It is extremely difficult to speak out clearly the exact time required for your site to come on serp. It depends upon the website (web design/development sites will take an eternity or might never be at all), the keywords you have chosen and from where you have created your backlinks. Niche category sites tend to rank sooner than sites that are generally appealing to a broader mass.

Its based on your web site and the back links you created,but it may take around 6 months to result your web site in search engine.

That would depend on the caliber of the backlinks, and the situation with your site. If you're building useless crap links they might just never register on any radar. If your profile is already fairly good the new links might not have huge immediate effects.

After getting decent backlinks we've seen some movement in SERP trackers even in very short time frames like 1 or 2 weeks. It should not really take 6 months to see some results unless you're doing it completely wrong.

However, keep in mind that I'm talking about concentrated SEO efforts, and there's really no way to know if we're attributing the rise to the action that actually was the culprit. For example, a SEO partner of mine gleefully declared a recently posted YouTube video and outreach a huge success, when in fact we'd build some links just couple of weeks prior.

Hi,

It takes 2/3 months minimum for the places you backlinked to, to give you backlinks.

As long as you post relevant content and good backlinks, you really shouldn't worry about how long it will take to get ranked.