The principle of redundancy is used when system reliability is improved through redundant or back up components. Suppose you’re on a business trip and you must awaken before 5 AM in time to get ready to catch a hotel shuttle for an important meeting. To rest assured you decide to put in a request to the front desk for a wake up call, set the alarm clock at your bedside, and set an alarm on your cell phone. Assuming you’ll awaken and if at least one of these components succeeds, and the probability of success for each of these components is .97, .98, and .95 respectively what is the probability you’ll be awakened

The new software organization requires a new point of sale and stock control system for their many stores throughout Pakistan to replace their aging mini-based systems. A sales assistant will be able to process an order by entering product numbers and required quantities into the system. The system will display a description, price, and available stock. In-stock products will normally be collected immediately by the customer from the store but may be selected for delivery to the customer's home address for which there will be a charge. If stock is not available, the sales assistant will be able to create a backorder for the product from a regional warehouse. The products will then either be delivered directly from the regional warehouse to the customer's home address, or the store for collection by the customer. The system will allow products to be paid for by cash or credit card. Credit card transactions will be validated via an online card transaction system. The system will produce…

You are a nasa engineer who needs to monitor the situation every time a probe uses its thrusters. For a given day you are given the planned times when the thruster will be used.  You need to be monitoring the situation at those boost times and for 5 minutes after. You want to figure out if you can take a break for a certain number of minutes.    To achieve this you are given the planned boost times in in hours and minutes with an am/pm. And you are given a desired break time in minutes. Output if you can take the break or not given the monitoring you have to do.   For example: If you know the thruster is fired at 5:00am and 12:50pm. You need to be monitoring the situation from 5:00am to 5:05am and again from 12:50pm to 12:55pm. Apart from those times you are free to take a break. So a 5 minute break is possible. But a 12 hour break is not possible. Note You should assume that the launch times that the user entered would occur in one day. However, you cannot assume that these were…

What if we construct the central processing unit, but not the one that detects danger?