Practice Midterm

Question 1

When using the command line on a computer, what does PWD mean in UNIX and PowerShell?

Answer 1

Print Working Directory

Question 2

When using the command line on a computer, what command will tell me my computer’s network name ?

Answer 2

hostname

Question 3

When using the command line on a computer, what command do you use to make a directory in UNIX and PowerShell?

Answer 3

mkdir

Question 4

When using the command line on a computer, what command is used to changed directory in UNIX and PowerShell?

Answer 4

cd

Question 5

When using the command line on a computer, what command is used to list a directory in UNIX and PowerShell?

Answer 5

ls

Question 6

When using the command line on a computer, what command is used to make a directory in UNIX and PowerShell?

Answer 6

mkdir

Question 7

When using the command line on a computer, what does the command RMDIR used for in UNIX and PowerShell?

Answer 7

Remove directory

Question 8

When using the command line on a computer, what command is used to become super user root in UNIX and PowerShell?

Answer 8

runas (Windows) or sudo (UNIX)

Question 9

When using the command line on a computer, what command is used to read a manual page in UNIX and PowerShell?

Answer 9

help (Windows) man (UNIX)

Question 10

When using the command line on a computer, what command is used to print some arguments in UNIX and PowerShell?

Answer 10

echo

Question 11

When done with the SHELL, what command do you use to exit the program?

Answer 11

exit

Question 12

When using the command line on a computer, what command is used to make an empty text file called Test Doc in UNIX and PowerShell?

Answer 12

New-Item Test_Doc.txt (Windows) OR touch Test_Doc.txt (UNIX)

Question 13

In python, how you code a Hello, World program?

Answer 13

print “Hello World!”

Question 14

In python, can we write x=100 instead of x = 100?

Answer 14

yes, but it is bad form

Question 15

In computer programming, what is the # symbol called

Answer 15

Octothorpe

Question 16

In python, comments are proceeded with;

Answer 16

#

Question 17

In python, the comma ( , ) is used to break lines of code that are longer than 80 characters. Do you have to use the comma?

Answer 17

You do not have to use a comma, but it is considered bad form

Question 18

When coding in python %r is for what?

Answer 18

debugging

Question 19

When coding in python the “”” is what kind of command

Answer 19

Multi-line string

Question 20

In python, there are a number of built in math functions. What does the % symbol represent

Answer 20

modulo

Question 21

true or false: Python is a scripting language and therefore uses an interpreter and not a compiler

Answer 21

true

Question 22

True or false: The main advantages of primary batteries are their high energy density, long storage life, and ease of disposal

Answer 22

True

Question 23

True or False: One convenient alternative from to the lead-acid battery is the gel cell, which contains a semisolid electrolyte that prevents spillage.

Answer 23

True

Question 24

What does this circuit represent?

looks like H

Answer 24

H-Bridge

Question 25

What does this circuit represent? | Looks like a triangle person.

Answer 25

Operational Amplifier

Question 26

What does MTTF stand for?

Answer 26

Mean Time to Failure

Question 27

What is the advantage of using Lead Acid batteries in robotics applications?

Answer 27

Cheap Easily rechargeable High power output capability

Question 28

What is the advantage of Alkaline batteries?

Answer 28

Popular and well-known Relatively safe Long shelf-life

Question 29

What is the advantage of NiCad batteries?

Answer 29

Inexpensive Rugged Come in "standard" sizes and are easy to recharge

Question 30

What is the advantage of NiMH batteries?

Answer 30

Good alternative to Alkalines in most situations High power density, "standard" size, not as rugged Better capability than alkalines and pretty easy to recharge

Question 31

What is the advantage of Lithium Ion and Lithium Polymer Batteries?

Answer 31

Ultra-light weight High power and high capability High cell voltage

Question 32

What is the advantage of Lithium Coin Cell batteries?

Answer 32

Light, high-density, small, and inexpensive High cell voltage Easy to stack for higher voltages

Question 33

Which Battery has the highest power density? 2

Answer 33

Lithium Coin Cell

Question 34

The human brain has what advantage over the modern computer?

Answer 34

Humans make faster descisions when the brain stores more information

Question 35

Microprocessors/Microcontrollers typically operate at what voltage?

Answer 35

5 volts

Question 36

What would be the challenge of using an AI to control an UE prosthesis?

Answer 36

The AI would need in excess of a billion memories to learn a small environment

Question 37

Proprio, C-leg, and Rheo use what type of battery?

Answer 37

Lithium-Ion

Question 38

In February 2003 by the European Union adopted what directive that restricts the use of six hazardous materials in the manufacture of various types of electronic and electrical equipment?

Answer 38

Restriction of Hazardous Substances Directive (RoHS)

Question 39

Which battery has the disadvantage of being very heavy, and tend to be very large bricks because power density is very low?

Answer 39

Lead Acid

Question 40

Which battery is known for being Non-rechargeable, low-capability costs about $1 and has up to 3000 mAh of charge capacity

Answer 40

Alkaline

Question 41

Which statement is true regarding NiMH batteries?

Answer 41

More expensive than Ni-Cads, service life isnt as long, don't like to be used in a high-drain system, self-discharges quickly. Good alternative to Alkalines in most situations, high power density, "standard" size, better capability than alkalines, pretty easy to recharge but not as rugged.

Question 42

Which of the following are characteristics of the C-Leg?

Answer 42

Initial Stance Phase Flexion, Stumble Recovery, Swing Resistance Self Adjusts to Incline Change, Stairs and Ramp Safety, Programmable On-board microprocessor (PIC16C74B)

Question 43

Which statement is true regarding the Rheo Knee?

Answer 43

Provides the user with Initial Stance Phase Flexion, Stumble Recovery, and Resistance Self Adjusts to Incline Change, Stairs and Ramp Safety, Programmable, and Artificial Intelligence (AI) Embedded microprocessor (Motorola 68HC11)

Question 44

Which battery is known to be Lower power density, requires "full discharge/recharge" cycles every once in a while to reduce memory effect' (the growth of crystals on the battery plates), contains toxic metal?

Answer 44

Ni-Cad

Question 45

What type of architecture has physically separate storage and signal pathways for instructions and data?

Answer 45

Harvard architecture

Question 46

What computer architecture is faster for a given circuit complexity because instruction fetches and data access do not contend for a single memory pathway?

Answer 46

Harvard architecture