"I'm Luke Skywalker, I'm here to rescue you!"
"Who?"
"I'm with Ben Kenobi, come on!"
"Ben Kenobi where is he?"
*luke and leia exit the cell, the door closes*
*camera pans to the right, Jar Jar is just sitting there*
JarJar: "So, uh... what meesa should do? Meessa should wait here? Is Annie's son gonna rescue JarJar too? Hello? (Echoes) Hello?? Anyone?"
So it's obvious he dies in the Death Star explosion.