Global – On the same day when Yahoo! announced plans for its second round of layoffs in six weeks, Google is boasting 2011 as the biggest hiring year in company history with over 500 hires in Asia Pacific.

After cutting about 700 employees last December, Yahoo! announced it will further lay off 1% of its global workforce, which is estimated at about 130 people.

For Google, however, it wrote in an official blog post that 2011 will be “the biggest hiring year in company history”, surpassing 2007 when it added 6,000 people to Google worldwide.

In the Japan and Asia Pacific region, Google is planning to hire over 500 people.

Alan Eustace, SVP engineering and research of Google, said many of the company’s big bets, including on mobile and display advertising, have started to pay off.

According to Google, display advertising has been a main driver in 2010 and of its China business, with the largest advertisers increasing their spending by 75%.

For Asia, Google said it would continue to act as an export gateway, allowing Asian businesses of all sizes to connect with new international clients via export tools such as AdWords and AdSense.