Two drivers, walt and jessie, each drive up to a gas station. before looking at the price, each places an order. walt says, "i'd like 10 gallons of gas." jessie says, "i'd like $10 worth of gas." what is each driver's price elasticity of demand

In the question above, Walt asks for 10 gallons of gas while Jessie asks for $10 worth of gas. In both the cases, the drivers need gas but Walt is concerned about the quantity of gas and Jessie is concerned about the price of the gas.
In case of Walt, the price elasticity of demand is zero because he want 10 gallons of gas regardless of the price of gas per gallon. While in case of Jessie, the price elasticity of demand is one because he wants to buy gas worth $10, no matter what is the price of the gas per gallon.

The advantage of administering personality tests on employees is that it will allow the employer to know the mindset and personality of the employee. this will allow the employer to at least have an idea as to how the employee works and how his attitude in the workplace. the disadvantage is that it may make the employee a little anxious as to whether he would meet the personality requirements of the employer and whether he would be able to retain the job or not. 

The statement is true