PY365 Lesson 6 Exam SCORE 90 PERCENT

Question 1

The discipline focused on the production of software, as well as the development of tools, methodologies, and theories supporting software production, is most accurately called:

Question options:

	artificial intelligence.
	computer engineering.
	computer science.
	software engineering.
Question 2

Which mistake was NOT made by AECL, the manufacturer of the Therac-25?

Question options:

	It did not include software or hardware devices to detect and report overdoses.
	It did not tell other hospitals about possible overdose incidents.
	It reused code without proper testing.
	It continued to sell the Therac-25 after the FDA declared it to be defective.
Question 3

In November 2002 a programming error caused a touch-screen voting machine to fail to record 436 ballots cast in Wake County:

Question options:

	North Carolina.
	Indiana.
	Florida.
	California.
Question 4

Which of these statements about the National Crime Information Center (NCIC) is true?

Question options:

	The NCIC databases contain about 40 million records.
	Improper use of the NCIC has led to about 1 million false arrests.
	Local law enforcement agencies enter most of the information that is in the NCIC databases.
	The Department of Homeland Security is in charge of the NCIC.
Question 5

__________ is the process of determining if a computer program correctly implements the simulation model.

Question options:

	Identification
	Verification
	Conditioning
	Specification
Question 6

The process of determining if a model is an accurate representation of the real system is called:

Question options:

	the null hypothesis.
	software engineering.
	synthesis.
	validation.
Question 7

In a(n) __________, two or more concurrent tasks share a variable, and the order in which they read or write the value of the variable can affect the behavior of the program.

Question options:

	causal condition
	integrated system
	race condition
	direct system
Question 8

Computer simulations can:

Question options:

	accurately predict the weather a month in advance.
	save automobile manufacturers time and money as they develop new cars.
	prove our planet is overpopulated.
	All of the above
Question 9

The AT&T long-distance network did not collapse entirely on January 15, 1990, because:

Question options:

	the U.S. Secret Service arrested the culprits before they could do any further damage.
	AT&T technicians rapidly fixed the software bug in the routing switches.
	MCI loaned some equipment to AT&T.
	not all the routing switches had been converted to the latest software.
Question 10

The Ariane 5 was a satellite launch vehicle designed by the __________ space agency.

Question options:

	British
	U.S.
	German
	French
Question 11

The Ariane 5 satellite launch vehicle failed because:

Question options:

	a faulty on-board computer caused the other computers in the network to crash repeatedly.
	a bad sensor fed faulty information into the flight control computer, causing it to fail.
	the rocket's on-board computer sent back faulty information to ground control, causing the human controllers to destroy the rocket.
	code that worked correctly on the Ariane 4 failed on the Ariane 5.
Question 12

Software engineers use a four-step process to develop a software product. Which of the following is NOT one of the steps?

Question options:

	Validation
	Simulation
	Evolution
	Specification
Question 13

The Patriot missile system:

Question options:

	was designed to shoot down airplanes.
	failed to shoot down a Scud missile that killed 28 U.S. soldiers in the Gulf War.
	failed because it had been left running too long.
	All of the above
Question 14

Some computer experts have spoken out against the conversion to touch-screen voting machines because:

Question options:

	there is no evidence that there have been any problems with punched card systems.
	they are made in China, which does not even hold elections.
	a power failure could make it impossible for people to vote.
	they do not have a paper audit trail.
Question 15

In 1999 computer errors led to the loss of two NASA probes to:

Question options:

	The Moon.
	Mars.
	Venus.
	Saturn.
Question 16

Which of the following is NOT a reason to use a computer simulation?

Question options:

	To model past events
	To produce a detailed financial model
	To reduce costs
	To save time
Question 17

The inability of BAE Automated Systems to create an automated baggage handling system led to a significant delay in the opening of the new airport outside the city of:

Question options:

	Boston.
	Chicago.
	Philadelphia.
	Denver.
Question 18

In 1975 Congress passed the __________. One goal of the act was to prevent manufacturers from putting unfair warranties on products costing more than $25.

Question options:

	Retail Protection Act
	Uniform Commercial Code
	Limitation of Remedies and Liability Act
	Magnuson-Moss Warranty Act
Question 19

Which of the following is NOT an issue with DRE voting machines used in Brazil and India?

Question options:

	Lack of a paper audit trail
	Vulnerability to tampering
	Voter identity may be revealed
	Source code is a trade secret
Question 20

By making the PDP 11 minicomputer an integral part of the Therac-25, AECL was able to:

Question options:

	shrink the size of the machine considerably.
	increase the stock price of its subsidiary Digital Equipment Corporation.
	reduce costs by replacing hardware safety features with software safety features.
	eliminate the need for lead shielding.