Mechanical advantage is the ratio of the force required to move a load divided by_____

E xercise 17.2.4: The following is a sequence of undo-log records written by two transactions T and U: < START T>; ; <

masya89 [10]

Answer:

Check the explanation

Explanation:

The following is a sequence of Undo — log records written by two transactions.

<START 1>; <F, A, 10>; <START U>; <U, B, 20>; <F, C, 30>; <U, D, 40>; <COMMIT U>; <T, E, 50>; <COMMIT T>; (a) < START U >;

If the system crashes after the log < START U >,

Then we have log records will be shown below.

<START U>;

<T, A, 10>;

<START T>;

SYSTEM CRASHED

The recovery manager sees the Undo - Redo log and inspect the both trans-actions T and U are not committed. Then those elements changed by both transactions are arranged to their old values.

Transaction T changes the element A.
Then the Element A is arranged to old value A=10.
Transaction U did not change any existing element in the records.
So, not anything to do with transaction U.

(B) < T, E, 50>;

If the system crashes after the log < T, E, 50>;

Then we have log records will be shown below .

START T>;

<T, A, 10>;

<START U>;

<U, B, 20>;

<T, C, 30>;

<U, D, 40>;

<COMMIT U>;

<T, E, 50>;

SYSTEM CRASHED

The recovery manager sees the Redo logs and inspect the transaction U is committed or not. Such changes made by transaction U are reached to disk.

• So much the recovery manager arranged the elements to their recent values changed by transaction U.

• Transaction U changed the elements B and its records <U, B, 20>with re-cent values.

• Transaction U changed the elements D and its records <U, D, 40>with recent values.

• The transaction T is not committed.

• Then the elements changed by transaction T are arranged to old values.

• Then element A is arranged to 10, C is arranged to 30 and E is arranged to 50.

7 0

2 years ago

There are no breakpoints in the "Access Customer Account" subpage however there is an error. What will happen if you choose to s

blsea [12.9K]

Answer:

Move to the breakpoint at "Get Customer Details" stage.

Explanation:

This question is incomplete, we need a diagram and four options to resolve this questions, I attached the diagram and the options.

- The process will work all stages in the "Access Customer Account" page until the error is thrown and then focus would move to the breakpoint at "Get Customer Details" stage.

- The process will work all stages in the "Access Customer Account" page until the error is thrown and then focus would move to the "Recover1" stage.

- The process will work all stages in the "Access Customer Account" page until the error is thrown and then focus would move to the stage containing the error on the "Access Customer Account" page.

- The process will work all stages in the "Access Customer Account" page until the error is thrown and then focus would move to the "Exception1" stage.

In this case, we are going to run an extra from subpage testing in <u>Process studio</u>. Process studio is a tool where we can test these processes.

The process always it's going to work all stages in the "Access Customer Account" we're going to receive an interruption when the error is activated, moving the focus to the Get Customer Details stage.

There is an error in the stage Access Customer Account, if we run the processes with the Go button, the focus should move into the Recover1 stage, and should show the error.

But in this particular example, we must use the STEP OUT BUTTON, What means this?

The process it's going be executed, but won't show any error or message, because we have used the STEP OUT BUTTON.

If we use the STEP OUT BUTTON, the process should end but in this case, we have a breakpoint in Get Customer Details stage, for that the focus and the process will end in Get Customer Details stage and not at the end or at the Recover1 stage.

8 0

2 years ago

How efficient would a 6-bit code be in asynchronous transmission if it had 1 parity bit, 1 start bit, and 2 stop bits?

Lana71 [14]

How efficient well if we are transmitting 6bits and we need 10 to transmit the 6 bits that would be 6/10 = .6 = 60% efficient.

7 0

2 years ago

Early Intel processors (e.g., the 8086) did not provide hardware support for dual-mode operation (i.e., support for a separate u

Firlakuza [10]

Answer:

Uneven use of resources

Explanation:

Potential problem associated with supporting multi - user operation without hardware support is:

Uneven use of resources: In a situation where we assign a set of resources to user 1 and if a new user comes, then it would be difficult to allocate new resources to him. The processor would get confused between the two users. And the tasks would not be completed. This can affect task processing.

8 0

2 years ago

You are working on a documentation file userNotes.txt with some members of your software development team. Just before the file

neonofarm [45]

Answer: Provided in the explanation section

Explanation:

The question says :

You are working on a documentation file userNotes.txt with some members of your software development team. Just before the file needs to be submitted, you manager tells you that a company standard requires that one blank space be left between the end-of-sentence period (.) and the start of the next sentence. (This rule does not affect sentences at the very end of a line.) For example, this is OK: Turn the knob. Push the "on" button. This is not: Turn the knob. Push the "on" button. Asking around among your team members, you discover that some of them have already typed their sentences in the approved manner, but others have inserted two or even more blanks between sentences. You need to fix this fast, and the first thing you want to do is to find out how bad the problem is. What command would you give to list all lines of userNotes.txt that contain sentence endings with two or more blanks before the start of the next sentence?

Solution:

Here, our fundamental aim is to look for the content which is having single space between different sentences. As it sentences finishing with . Going before with single and various spaces we have to channel and match just e the sentences which are finishing with ". "

For this we use order called "GREP" in Unix. "GREP " represents worldwide quest for standard articulation. This order is utilized inquiry and print the lines that are coordinating with determined string or an example. The example or indicated string that we have to look through we call it as customary articulation.

Syntax of GREP:

GREP [OPTIONS] PATTERN [FILE_NAME]

For our solution please follow the command

GREP "*\•\s$" userNotes.txt

Now it will display a all the lines having . Followed by single space.

6 0

2 years ago

Mechanical advantage is the ratio of the force required to move a load divided by______