Deck 6: An Introduction to Debugging

Question 1

The first step to take when debugging is to call tech support .

Answer 1

False

Question 2

It is possible to have completely safe software if there has been extensive program testing .

Answer 2

False

Question 3

If your computer is not working, most likely it is your fault .

Answer 3

True

Question 4

You can be sure that software running safety-critical systems is perfect .

Question 5

Testing and other techniques can ensure confidence that software works under abnormal circumstances .

Question 6

The basic premise of fail-soft and fail-safe design strategies is to have the program continue to operate as long as productive service is safely provided, but when that is not possible, the program should avoid negative outcomes by stopping entirely .

Question 7

Debugging principles are not limited to use by IT professionals .

Question 8

It is practically impossible to have 100% bug-free software .

Question 9

Sometimes unnecessary changes are made during the debugging process .

Question 10

The term bug (that is, a glitch in a computer system) evolved from an incident with the Volkswagen Beetle .

Question 11

Debugging relies on logical reasoning and is learned by experience .

Question 12

A basic debugging strategy is to isolate the problem by dividing an operation into those parts that are working and those that are not .

Question 13

Often fixing one error can reveal other errors you didn't realize were present .

Question 14

The toughest bugs to fix are always the toughest bugs to find .

Question 15

In software, a program that stops operating to avoid harm is called

A) fail-safe
B) bug-safe
C) fail-soft
D) fault-tolerant

Question 16

In software, a program that continues to operate but with possibly degraded functionality is called

A) fault-tolerant
B) bug-safe
C) fail-soft
D) fail-safe

Question 17

What is the first step in the debugging process?

A) isolating the problem
B) checking obvious error sources
C) checking that the error is reproducible
D) generating a theory to explain the problem

Question 18

In Firefox, what tool can you use to see the errors on a web page?

A) the Web Console
B) the Tech Support section
C) the Help menu
D) Firefox has no such tool .

Question 19

How are hardware failures generally resolved?

A) The manufacturer uses techniques such as redundancy .
B) The manufacturer employs a 24-hour support staff .
C) The manufacturer tests using the specification .
D) The manufacturer creates only unbreakable hardware .

Question 20

A nanosecond is

A) 1/1,000,000th of a second
B) 1/1,000th of a second
C) 1/1,000,000,000th of a second
D) 1/100th of a second

Question 21

Software that translates a program written in a programming language into machine instructions is a(n)

A) algorithm
B) browser
C) driver
D) compiler

Question 22

To assist with HTML debugging, errors discovered by Firefox while rendering a page can be viewed by going to the

A) HTML Debugger
B) HTML Compiler
C) Web Console
D) Diagnostic Analyzer

Question 23

Most hardware failures caused by the manufacturing process show up after only a few hours of operation . This is known as

A) the redundancy factor property
B) the infant mortality property
C) the specification failure property
D) the early failure property

Question 24

If you have tried all the debugging steps you learned in this chapter and still can't fix the problem, what should you do before throwing up your hands in despair?

A) Take a break and come back to try to solve the problem again later .
B) Change to another computer .
C) Email your instructor and explain that you can't submit an assignment because your computer is broken .
D) Any of these

Question 25

Select all that apply . Which of the following is NOT a step to take when attempting to debug a problem with your computer?

A) Check to see if the error happens again if you do the same thing that caused the error in the first place .
B) Call a friend who uses the same software .
C) Define, for yourself, what exactly is the error .
D) Check for obvious error sources, such as typing a lowercase L instead of a 1 .

Question 26

Select all that apply . Which of the following statements is TRUE?

A) Given enough time, manufacturers can develop bug-free software .
B) Getting out and getting back in often works when an application is not working correctly .
C) Program testing reveals only the presence of bugs, never their absence .
D) Extensive and appropriate program testing will reveal all possible bugs .

Question 27

Select all that apply . If your printer suddenly stops working, which of the following do you already know?

A) The computer and printer were working in the past .
B) Printer settings often change without user input .
C) Part of the printer is mechanical .
D) Information must be transmitted back and forth between the computer and the printer .

Question 28

________ is the goal of software programs: to be reliable in safety-critical situations, such as life support .

Question 29

In programming, a precise definition of the input, how the system should behave, and how the output should be produced is known as a(n) ________ .

Question 30

When your car doesn't start, you figure out whether the battery is dead, whether the fuel tank is empty, or whether something else is wrong using the process of ________ .

Question 31

Bypassing an error with an alternative approach is called a(n) ________ .

Question 32

The print ________ is a place where printing tasks wait before being processed .