Every recursive function should have an exit criterion (=handling the base case) to exit the recursion.
Without it, it wil recurse forever, until system resources run out (typically the call stack will overflow and your program will crash).
<em><u>Answer</u></em>
5 hours
<em><u>Explanation</u></em>
The two working together can finish a job in

Also, working alone, one machine would take one hour longer than the other to complete the same job.
Let the slower machine working alone take x hours. Then the faster machine takes x-1 hours to complete the same task working alone.
Their combined rate in terms of x is

This should be equal to 20/9 hours.

Multiply through by;





Factor to get:


It is not feasible for the slower machine to complete the work alone in 4/9 hours if the two will finish in 20/9 hours.
Therefore the slower finish in 5 hours.
Answer:
RAM and Hard Drive
Explanation:
An FRU is also called a Field-repleacable Unit and is usually an assembly that is easily removed from an electronic equipment, laptop or just a computer and replaced so that one does not have to take the entire system for repairs. When trying to equip yourself with this unit of a laptop, you must take your Random Access Memory and your hard drive as they contain the whole information on the laptop.
Answer:
Webcam
Explanation:
A webcam is mainly used for taking images or videos from the computer. the webcam is a combination of two basic words i.e. web and camera. webcam can be connected to any computer via USB. It can be mounted on the desktop and sometimes it comes inbuilt on the laptops.
A webcam is also used for face recognition function to login to a computer system.
so according to the scenario, the most appropriate answer is a webcam.
Answer:
B. Access point repeater
Explanation:
RFID can be used for all of the listed applications except for Access point repeater. This is because Radio Frequency Identification is a technology, which includes wireless data capture and transaction processing for both short and long-range applications. Usually tracking, tracing, accessing, and managing information. It can unfortunately not be used for repeating the same RFID signal or any access point for that matter.