Raspberry Pi Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
What is a computer? - CORRECT ANSWER - A computer is a device that accepts
information (in the form of digitalized data) and manipulates it for some result based on a
program or sequence of instructions on how the data is to be processed.
Computers also include the means for storing data (including the program, which is also a form
of data) for some necessary duration. A program may be invariable and built into the computer
(and called logic circuitry as it is on microprocessors) or different programs may be provided to
the computer (loaded into its storage and then started by an administrator or user).
What is Raspberry Pi's Operating System? - CORRECT ANSWER - Variant of first Linux
Version "Debian" known as "Raspbian"
What are some applications software for Rasp Pi? - CORRECT ANSWER - Surf Internet
with a Browser, High Definition Video, Spreadsheets and Word Processing, Games
What are some of the compilers and interpreters used with a Rasp Pi? - CORRECT
ANSWER - Compilers and Interpreters: C, C++, Java, Python, R, etc.
What is a Raspberry Pi? - CORRECT ANSWER - Raspberry Pi is a low cost, credit card
sized computer that can plug into a display monitor or TV, standard keyboard and mouse, hard
disk and USB storage devices and connect to the network wired or wirelessly.
How much memory does a Raspberry Pi have? - CORRECT ANSWER - 1GB RAM
CPU of Raspberry Pi - CORRECT ANSWER - 1.2 GHz Quad-Core ARM Cortex
-(The ARM Cortex-A9 MPCore is a 32-bit processor core)
What's Headless mode? - CORRECT ANSWER - Raspberry Pi is typically used in
environments where attaching a display, keyboard, mouse, etc., is not feasible due to
environment factors, cost and not required by applications software .
, Operating a Raspberry Pi by directly accessing the OS terminal or the Desktop via VNC over the
network (WiFi or Ethernet) without the need for a monitor, keyboard or a mouse is called
Headless mode.
Duty Cycle - CORRECT ANSWER - T = 1/f
DC = Pulse Width/T
Duty cycle is the proportion of time during which a component, device, or system is operated. In
electronics, duty cycle is the percentage of the ratio of pulse duration, or pulse width (PW) to the
total period (T) of the waveform
How does a DC motor work? - CORRECT ANSWER - A DC Motor consists of an
armature (rotating part) a field. The field can consists of either a winding (electromagnet) or
permanent magnet.
(Small DC motors have permanent magnets as the field while large DC motors have windings
that forms an electromagnet.) Speed is varied by varying the magnetic field intensity of the field.
Rotational Direction can be changed by reversing the polarity of the voltage applied to the
armature.
What is an H-bridge and how does it function? - CORRECT ANSWER - An H-bridge is
built of four switches that control the flow of current to a load. An H bridge is an electronic
circuit that enables a voltage to be applied across a load in opposite direction. These circuits are
often used in robotics and other applications to allow DC motors to run forwards or backwards.
For our DC motor we use a SN754410 which is a Quadruple Half-H-Bridge capable of
controlling the rotational direction of two DC motors.
How does an H-bridge revers polarity? - CORRECT ANSWER - Enable where you want
the magnets to pull from to fine tune where you want the motor to turn.
What is a Servo Motor? - CORRECT ANSWER - Servomotor is a DC or AC Motor with a
potentiometer, gear assembly and a controlling circuit. Gear assembly is used to reduce the speed
and increase the torque.
Exam Questions and CORRECT Answers
What is a computer? - CORRECT ANSWER - A computer is a device that accepts
information (in the form of digitalized data) and manipulates it for some result based on a
program or sequence of instructions on how the data is to be processed.
Computers also include the means for storing data (including the program, which is also a form
of data) for some necessary duration. A program may be invariable and built into the computer
(and called logic circuitry as it is on microprocessors) or different programs may be provided to
the computer (loaded into its storage and then started by an administrator or user).
What is Raspberry Pi's Operating System? - CORRECT ANSWER - Variant of first Linux
Version "Debian" known as "Raspbian"
What are some applications software for Rasp Pi? - CORRECT ANSWER - Surf Internet
with a Browser, High Definition Video, Spreadsheets and Word Processing, Games
What are some of the compilers and interpreters used with a Rasp Pi? - CORRECT
ANSWER - Compilers and Interpreters: C, C++, Java, Python, R, etc.
What is a Raspberry Pi? - CORRECT ANSWER - Raspberry Pi is a low cost, credit card
sized computer that can plug into a display monitor or TV, standard keyboard and mouse, hard
disk and USB storage devices and connect to the network wired or wirelessly.
How much memory does a Raspberry Pi have? - CORRECT ANSWER - 1GB RAM
CPU of Raspberry Pi - CORRECT ANSWER - 1.2 GHz Quad-Core ARM Cortex
-(The ARM Cortex-A9 MPCore is a 32-bit processor core)
What's Headless mode? - CORRECT ANSWER - Raspberry Pi is typically used in
environments where attaching a display, keyboard, mouse, etc., is not feasible due to
environment factors, cost and not required by applications software .
, Operating a Raspberry Pi by directly accessing the OS terminal or the Desktop via VNC over the
network (WiFi or Ethernet) without the need for a monitor, keyboard or a mouse is called
Headless mode.
Duty Cycle - CORRECT ANSWER - T = 1/f
DC = Pulse Width/T
Duty cycle is the proportion of time during which a component, device, or system is operated. In
electronics, duty cycle is the percentage of the ratio of pulse duration, or pulse width (PW) to the
total period (T) of the waveform
How does a DC motor work? - CORRECT ANSWER - A DC Motor consists of an
armature (rotating part) a field. The field can consists of either a winding (electromagnet) or
permanent magnet.
(Small DC motors have permanent magnets as the field while large DC motors have windings
that forms an electromagnet.) Speed is varied by varying the magnetic field intensity of the field.
Rotational Direction can be changed by reversing the polarity of the voltage applied to the
armature.
What is an H-bridge and how does it function? - CORRECT ANSWER - An H-bridge is
built of four switches that control the flow of current to a load. An H bridge is an electronic
circuit that enables a voltage to be applied across a load in opposite direction. These circuits are
often used in robotics and other applications to allow DC motors to run forwards or backwards.
For our DC motor we use a SN754410 which is a Quadruple Half-H-Bridge capable of
controlling the rotational direction of two DC motors.
How does an H-bridge revers polarity? - CORRECT ANSWER - Enable where you want
the magnets to pull from to fine tune where you want the motor to turn.
What is a Servo Motor? - CORRECT ANSWER - Servomotor is a DC or AC Motor with a
potentiometer, gear assembly and a controlling circuit. Gear assembly is used to reduce the speed
and increase the torque.
