DSO Triggering Modes: Auto, Normal, Single, Edge, Pulse Width, Video, and Pattern triggering. Triggering is used to stabilize and capture waveforms based on specified conditions. Ammeter and Voltmeter Connections: Ammeter is connected in series with the circuit because it measures current and has very low internal resistance. Voltmeter is connected in parallel across the component because it measures voltage and has very high internal resistance. Common Interview Follow-up: Connecting an ammeter in parallel can cause a short circuit, while connecting a voltmeter in series can block current flow.