Not necessarily, but. Many of the symptoms commonly associated with gallbladder problems may actually be due to stomach problems such as ulcers, gastritis, or acid reflux. Upper endoscopy can help your doctor diagnose and treat these other possible causes of gallbladder-like pain/nausea/cramping. Treating these other problems, if found, is important even if the gallbladder is removed.
Usually not. If you are having a lap chole for typical symptomatic cholelithiasis, not necessary. If your diagnosis remains uncertain and your doctors want to be sure that lap chole is the best option for you, an upper endoscopy is done as part of your work up.