Calculated expressions start with an equal sign.

You obtain a digital ID when you:

A) purchase Microsoft Office. B) register online. C) purchase it from a certification authority. D) purchase a computer.

You are writing a procedure to add a node to a doubly linked list. The system on which this procedure is to be run is subject to periodic hardware failures. The list your program is to maintain is of great importance. Your program must ensure the integrity of the list, even if the machine fails in the middle of executing your procedure. Supply the individual statements to update the list. (Your list should be fewer than a dozen statements long.) Explain the effect of a machine failure after each instruction. Describe how you would revise this procedure so that it would restore the integrity of the basic list after a machine failure.

What will be an ideal response?