Computer Concepts Exercises

Topics: Computer, Hard disk drive, Personal computer Pages: 16 (2338 words) Published: October 29, 2012
Chapter 1

010100 The Web is just another name for the Internet. (Answer: False)

010200 A computer’s operating system is a type of application software. (Answer: False)

010300 Microcontrollers are special purpose microprocessors that can be embedded in devices such as refrigerators, cars, and washing machines. (Answer: True)

010400 A bit is a binary digit, such as a 1 or 0. (Answer: True)

010500 ASCII, EBCDIC, and Unicode are used to represent character data. (Answer: True)

010600 A megabyte is 1024 bits. (Answer: False)

010700 Microprocessors are a type of integrated circuit. (Answer: True)

010800 C, COBOL, and Java are examples of programming languages. (Answer: True)

010900 A compiler converts source code to object code. (Answer: True)

011000 The list of codes for a microprocessor’s instruction set is called machine language. (Answer: True)

011100 A microprocessor holds data in the interpreter register. (Answer: False) 011200 A dictionary attack is a virus that hides out in the spelling checker for your word processing software. (Answer: False)

012100 Computers and the digital revolution have changed our lives in many fundamental ways. If you were on the front lines of the digital revolution when computers were first developed to break codes and calculate missile trajectories, you were most likely living in what time period?

a. World War I

b. The roaring twenties

c. World War II

d. The 1960s

(Answer: c)

012200 Today, consumers can choose from a wide variety of digital devices, including personal computers, workstations, videogame consoles, smartphones, iPods, and PDAs. Knowing the strengths of these devices helps you make the right choice. What is the fundamental difference between videogame consoles, personal computers, and smartphones?

a. Video game consoles and smartphones are not be classified as computers because they don’t have stored program capabilities like real computers.

b. Videogame consoles and smartphones fill specialized niches and are not replacements for personal computers.

c. Personal computers and smartphones can be used to access the Internet, whereas videogame consoles cannot.

d. Personal computers and smartphones have better graphics than videogame consoles.

(Answer: b)

012300 When you shop for digital devices, their capabilities are often touted in

terms of speed and capacity. Suppose you’re shopping for a USB Flash drive. A

friend recommends one that’s 64 GB. What does that mean?

a. It operates at 64 gigabits per second.

b. It holds 64 billion bytes of data.

c. It holds 64 million 0s and 1s to represent data.

d. It uses 64-bit ASCII code to hold data.

(Answer: b)

012400 Programmers write computer programs for word processing, displaying

photos, playing music, and showing movies. What programmers write, however,

is not what a computer actually processes. Why is this the case?

a. Because programmers usually write programs using high-level programming languages that have to be converted into machine language that computers can work with.

b. Because programs are basically outlines that programmers have to fill out using op codes.

c. Because high-level languages are too detailed for computers to process, so programs written in these languages have to be simplified.

d. Because computer programmers make too many errors for programs to run successfully.

(Answer: a)

012500 Security experts stress that the use of “strong” p asswords can prevent identity theft and help to keep your computer files secure. Which of the following passwords is likely to be the most secure? a. 12345 because it is all numbers.

b. Hippocampus, because it is a long and unusual word.

c. Il2baomw, because it combines numbers with a nonsense word.

d. Football88, because it combines a word and numbers.

(Answer: c)...
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