Chapter 6

Question 1

The first step in the debugging process is to

Answer 1

reproduce the problem

Question 2

Computers do exactly the same thing every time when given the same input. What is this property called?

Answer 2

Deterministic

Question 3

Most software

Answer 3

contains bugs

Question 4

When using computers, what is the most common source of problems?

Answer 4

Human error

Question 5

What does the “s” stand for in https?

Answer 5

secure

Question 6

When testing, it is never possible to establish the_____of a program.

Answer 6

correctness

Question 7

Not only is the computer unable to_____itself, we can’t____it directly, either.

Answer 7

Debug

Question 8

What built-in tool in most browsers can help you debug a web page?

Answer 8

error console

Question 9

How do we know the software running safety-critical systems is perfect?

Answer 9

we can’t

Question 10

You should expect _____ when interacting with software.

Answer 10

feedback

Question 11

An alternative approach to get around a problem is called a(n)

Answer 11

Workaround

Question 12

A(n)_____ program continues to operate when there is a problem, although its efficiency may be degraded

Answer 12

fail-soft

Question 13

A(n)_____program shuts down to avoid causing the problem

Answer 13

fail-safe

Question 14

Computers don’t understand what we_____, only what we_____

Answer 14

mean, say

Question 15

Bugs in commercial software are usually fixed

Answer 15

releases

Question 16

Computers are ____, which means that they will do exactly the same thing every time if given the same input.

Answer 16

deterministic

Question 17

___ is the most obvious HTML error.

Answer 17

The end tag

Question 18

Errors in HTML code are generally not tough to _____, just tough to ____.

Answer 18

fix, locate

Question 19

Program testing reveals only the ____ of bugs, never their _____.

Answer 19

presence, absence

Question 20

Explain in detail why error messages produced by a computer do not usually explain exactly what the problem is.

Answer 20

An error message is in the order displayed when an unanticipated condition occurs, naturally on a computer or other device .
Device not ready: This error most frequently occurs when there is no floppy disk.
A complex issue may need a more detailed error message in order to sufficiently inform the user of the problem.

Question 21

Design several workarounds for the computer printing error. Pretend it’s your term paper and it has to be printed. How would you get around the problem that the computer and the printer aren’t printing?

Answer 21

https://www.chegg.com/homework-help/questions-and-answers/1design-several-workarounds-computer-printing-error-pretend-s-term-paper-printed-would-get-q19185942

I would first try restarting the computer. Then, I would check the connection on both the computer and the printer. Then, I would check the printing queue to see if it was forced to wait. I would then check any refills needed for the printer.

Question 22

Describe a time when you debugged something in your life (it doesn’t need to relate to computers).

Question 23

Suppose your friend’s personal music player (such as an iPod) isn’t playing any songs. Explain the process you would go through to debug the problem. List at least eight questions you would ask, and explain how each applies to the debugging guidelines.

Answer 23

https://www.chegg.com/homework-help/questions-and-answers/1suppose-friend-s-personal-music-player-ipod-isn-t-playing-songs-explain-process-would-go–q19169210

Question 24

Explain the differences between fail-soft and fail-safe.

Answer 24

Fail-Soft: When a device selectively shuts down some services or apps or functions until the fault is repaired it is fail-soft. Fail-soft capability avoids the device from completely failing due to fault in 1 area.

Fail-Safe: These devices have backup devices etc built in, so in case of failure of the primary parts the backup part takes over and the device can be running without any downtime.

Question 25

Why is debugging a better approach than aimlessly “trying stuff”?

Answer 25

debugging is a logical process; "trying stuff" can lead to more bugs and fixing and unfixing the same error multiple times

Question 26

List five questions you should ask yourself while debugging.

Answer 26

Is my set up or configuration correct? Did the debug log tell me what the actual problem is? Am I in the right folder? Is it just a syntax or spelling error? Is this a data issue?

Question 27

Why do programmers never say they are down to the last bug? Provide a concrete example that illustrates this using HTML (your example should be your own, and not come directly from this book).

Answer 27

Once a bug is fixed, it could result in more bugs being revealed.

Question 28

Explain in detail three things you can try if you have followed the debugging process and are still unable to fix the problem.

Answer 28

Talk to senior developers about the issue you are getting, they might have also encountered the same problem. If not, reach the StackOverflow community and talk about the issues. Else just read the documentation and try to build your solution.