A burn-in test is a test which is usually performed on a system or component by running it for a long time in order to bring out any errors or system failures etc.
While doing it on CPU the data must be backed up as any kind of error or failure may result in the loss of data, at time systems can be repaired to retrieve data but still there is no guarantee, backing up is the best option.
Answer:
On the Slide Master tab, click Insert Placeholder, and then click the type of placeholder that you want to add. Click a location on the slide layout, and then drag to draw the placeholder. You can add as many placeholders as you like. (For Power point) But not sure about a short cut for it. Hope this helps!
Answer:
Recognize that a bug exists.
Explanation: