Which of the following is true about filters in microsoft excel database?

In a batch operating system, three jobs are submitted for execution. Each job involves an I/O activity, CPU time and another I/O

Ilia_Sergeevich [38]

Answer:

a) CPU utilization for uniprogramming system = 18.2%

b) CPU utilization for multiprogramming system = 41.379%

Explanation:

IO time = total time – CPU time

For JOB 1

CPU time = 3ms ,

total time= 23ms

IO time = 23-3 = 20ms ,

For JOB 2

CPU time =5ms

total = 29ms

IO time = 29-5 = 24ms

For JOB 3

CPU time = 4ms

total = 14ms

IO time = 14-10 =10ms

1.) In uniprogramming system, operations are performed sequentially

CPU utilization=total CPU time / total real time

CPU utilization =(3+5+4) / (23+29+14)

CPU utilization =0.182 or 18.2%

2) In multiprogramming system, jobs wait for the CPU to get free while performing IO operations concurrently

steps followed by the os

1. IO for 1st job at 0ms

2. IO for 2nd job at 0ms

3. IO for 3rd job at 0ms

4. CPU time for 3rd job at 5ms

5. Next IO job for 3rd job at 9ms END at 14ms

6. CPU time for 1st job at 9ms

7. Next IO job for 1st job at 14ms END at 23ms

8. CPU time for 2nd job at 14ms

9. Next IO job for 2nd job at 15ms END at 29ms

CPU time is 3+5+4 =12ms

Total execution time = 29ms

CPU utilization = 12*100/29= 41.379%

5 0

2 years ago

Which is the most portable memory media? Mention its features in detail.

scZoUnD [109]

Answer:

Flashdrive

Increased Durability. Unlike traditional hard-disk drives, flash drives lack moving parts. ...

Maximum Portability. ...

Plenty of Storage Capacity. ...

Fast Transfer Speeds. ...

Compatibility with Many Devices. ...

Use Flash Drives as Promotional Materials.

5 0

2 years ago

A developer needs to create a visualforce page that displays case data. The page will be used by both support reps and support m

shutvik [7]

Answer:

B. Use a new support manager permission sets

Explanation:

According to the requirements, field level security is required so, 1st options is not suitable because it may reduce the maintenance cost but increase the risk of security.

By creating a separate page for each of the two, it will leads to increase in the maintenance cost of the system. So <u>Option C</u> is also not suitable.

Option B is more Suitable as compared to others, that <em>Create a new support manager permission set</em>, with the help of this, both of Support rep and Support manager can visualize their required information with the help of support manager permission. This solution will not compromise the security and not increase the maintenance cost.

7 0

3 years ago

You have a scenario where you need to disable the guest network on your wireless router. You try to log in, but your password do

Tom [10]

Answer:

Reset the router by holding down the reset button for 30 seconds. The reset button can be located in the back or bottom area of the router. The function of the reset button is to turn restore the wireless router to default factory setting such that customized settings including the DNS, the static IP address setup, stored personal passwords DHCP parameter settings port forwarding and routing settings are erased.

Explanation:

8 0

3 years ago

Suppose you want to find a specific piece of hardware at the lowest price, and you don't mind if it's used. Which type of purcha

tino4ka555 [31]

Answer:

consumer-to-consumer auction site

Explanation:

The best type of purchase for this scenario would be a consumer-to-consumer auction site. These sites allow anyone to make a publication selling their product. This publication can be seen by anyone around the world. It is the best way of finding the cheapest prices for a specific item. The condition of the items on these sites can vary. The majority of the time they are used items in good conditions, but can also be new items or very worn out items being sold for parts.

7 0

3 years ago