how is parliamentary system of execution different from semi presidential system
A semi-presidential system, or dual executive system, is a system of government in which a president exists alongside a prime minister and a cabinet, with the latter responding to the legislature of the state. It differs from a parliamentary republic in that it has a popularly elected head of state who is more than a ceremonial figurehead, and from the presidential system in that the cabinet, although named by the president, responds to the legislature, which may force the cabinet to resign through a motion of no confidence.
Parliamentary republics have the executive entirely accountable to the legislature, while semi-presidential republics have only part of the executive (the prime minister and their cabinet) accountable to the legislature while another part (a directly elected president) is not accountable to the legislature.
In a parliamentary system, the head of government exercises most executive power. The amount the president will have will vary from country to country, but is generally ceremonial, even if the constitution says otherwise, just like with a monarch in a constitutional monarchy. In a semi-presidential system, the president holds actual executive power, though the amount will vary from country to country. In France, for example, the president controls foreign policy and defense, and the prime minister’s power over domestic policy will depend on if he is from the same party of the president or not. If different due to the prime minister’s party having a majority in the National Assembly, then the PM will generally have the control for domestic policy.
The semi-presidential president has more power than the parliamentary one.