Final answer:
François Hollande, as the French President, addressed several national crises, including the 2015 Paris terrorist attacks. His administration focused on security, social inequality, and economic issues, especially in the French banlieues.
Step-by-step explanation:
During his time in office, French President François Hollande took a number of significant actions. Hollande faced challenges such as terrorist attacks, one of the most notable being the November 2015 Paris attacks. In the aftermath, he, alongside President Barack Obama and Paris Mayor Anne Hidalgo, paid tribute to the victims at the Bataclan concert hall.
Hollande's presidency also entailed dealing with ongoing issues in the banlieues, where conditions had not improved significantly since prior riots under Sarkozy's presidency. To address this, Hollande may have continued or modified existing policies, focusing on issues of security, social inequality, and national economic concerns, although the exact effectiveness of his actions in these domains remains subject to debate.