By Chavi Mehta (Reuters) -IT hardware and services company IBM Corp beat quarterly revenue expectations on Monday but warned the hit from forex for the year could be about $3.5 billion due to a strong dollar. A hawkish Federal Reserve and heightened geopolitical tensions have driven gains in the dollar against a basket of currencies over the last year, prompting companies with sizeable international operations, including Microsoft and Salesforce, to temper expectations. Shares of IBM pared losses and were down 1.3% in extended trading. On the earnings call, Chief Financial Officer James Kavana…