O-Strand Mission Computers Practice Test

These questions are part of the practice quiz. Start practicing

• Which methods are used to verify worst-case latency for a control loop in a mission computer?
• Where does the ADF receive the 26 VAC synchro reference voltage?
• Which statement describes how altitude information is used by the MC1?
• What is ADF (Automatic Direction Finder)?
• Which statement best describes Night Effect?
• Which MC controls do what?
• Which description best fits the CSC's input set?
• What is the nomenclature of the AN/ARA-99? (HINT: use your 600-100)
• ADF Power supply sources are what?
• What is Night Effect?
• When the MC switch is set to 2 off (down), what happens to relay 1K-F082 and MC2?
• EMCON effects include which of the following?
• What best describes the role of a cross-checking controller in a redundant mission computer?
• Why is modular software architecture important for mission computers, and how does it aid verification and maintenance?
• Which of the following lists represents common interconnects used by mission computers to share resources?
• What is boundary scan test (JTAG) used for in mission computer hardware?
• Explain the concept of secure data handling: encryption at rest and in transit, key management, and protection against side-channel leaks in mission computers.
• The IAC control receives the audio error signal and produces which signal?
• Explain the role of boundary conditions and state estimation in mission computers for sensor fusion, such as Kalman filters.
• What is memory scrubbing in SEU mitigation?
• How much RAM can each MC hold?
• Channels 1 and 2 are used for what?
• Which statement about parity memory is true?
• In the context of sensor fusion, what is the role of boundary conditions?
• Which statement best describes the difference between deterministic and best-effort communication in mission computer networks?
• From the TACAN pulses, which data is decoded?
• What two components constitute the Automatic Direction Finder?
• MC2 mainly controls which area?
• Which approach best addresses preventing eavesdropping and tampering in inter-process communication on a mission computer?
• In TACAN transmit/receive mode, what will the system provide?
• What does the MUX do?
• In software testing for mission computers, which statement best describes verification vs validation?
• Which components are commonly duplicated in a dual-redundant mission computer architecture?
• The RT-1022/ARN-99 Receiver Transmitter does what?
• What WRA utilizes the ADF information to position the ADF bearing symbol on the display?
• What is a memory protection unit (MPU) and how does it contribute to software safety in a mission computer?
• What is the primary purpose of position fixing in navigation?
• When is Quadrantal Error maximized?
• What activates the ADF system?
• MC1 mainly controls which area?
• What is the purpose of data normalization in telemetry streams, and how does it facilitate cross-subsystem analysis?
• In the two-MC system, what are the defined roles for MC1 and MC2?
• The AS-3422/ARN-99 is the _____?
• From where does the MC system obtain altitude information?
• Why is time synchronization important in a distributed mission computer system?
• The height indicator uses which altitude setting?
• How is the ADF antenna mounted?
• In the ADF system, what does CSC stand for?
• TACAN offers 3 modes, what are they?
• What is the primary function of a Kalman filter in sensor fusion?
• Which display group shows the radar altitude on the HUD?
• The ADF modulates the received RF at what frequency?
• What does the Multipurpose Display Group provide?
• How many letter codes represent the TACAN station?
• Which system gates signals to avoid interference between avionics?
• Which statement about boundary scan tests is accurate?
• What are the key characteristics of a robust diagnostic framework for mission computers, including tests and failure modes?
• How can redundancy be implemented at the software level, including process-level vs thread-level redundancy?
• Why are sequence numbers used in fault-tolerant data logging?
• If one MC fails, what does the other MC take over?
• What is the function of the ADF when radios are keyed according to the A-395 Relay Assembly?
• ADF Antenna is described as what type and frequency range?
• TACAN antenna bands consist of?
• How would you implement fault-tolerant data logging, ensuring no data loss during failover?
• In clock synchronization, holdover refers to what behavior?
• How would you perform a fault tree analysis for a mission computer subsystem, and what are typical top-level failure modes?
• Which option best describes the TACAN transmit/receive operation?
• What is the primary role of a watchdog timer in a mission computer?
• In a dual-redundant mission computer architecture, which statement about hot spares is true?
• Explain the role of cryptographic tokens and authentication in inter-module communications for mission computers.
• Which device processes the signals to drive the indicator in the ADF system?
• Which SEU mitigation technique is primarily used to detect and correct bit flips in RAM?
• Air-to-Air TACAN mode does what?
• Which component is used to switch from the ADF antenna to the Comms antenna when radios are keyed?
• In a do-undo-redo diagnostic approach for mission computers, what is the primary purpose?
• A Multi-purpose Display Group provides which display capability?
• Describe Triple Modular Redundancy (TMR) and its voting mechanism.
• The radar altimeter measurement is based on which parameter?
• Which component is responsible for transmitting the radar pulses in a radar altimeter system?
• Mission computer operation is dependent on which of the following?
• 1K-C083 is which relay?
• What is Precipitation Static?
• Which factor can cause interference by electrostatic fields on radio navigation?
• What components are used to ensure data integrity in telemetry packets?
• What frequency range does the Automatic Direction Finder operate in?
• What is SpaceWire and why is it important for mission computer communications?
• What is the RF modulated to?
• Which interface is commonly used for high-bandwidth data transfer in spacecraft mission computers?
• In a bus arbitration scheme, which approach guarantees fair access by cycling through nodes?
• What portion of the earth's atmosphere affects the radar from sunrise to sunset?
• What do mission computers communicate with?
• How many Morse code characters are used in the TACAN ID tone?
• What does the low altitude warning index pointer do?
• TACAN range is initiated by which action?
• What is the role of a failover controller in a dual-redundant mission computer?
• What is the key difference between process-level redundancy and thread-level redundancy in mission computer software?
• If one MC fails, what is the surviving MC's primary role?
• Which TACAN mode provides range and bearing to a ground station?
• Through which interface do mission computers communicate with peripheral avionics equipment?
• Distinguish between hot, warm, and cold spare philosophy and when each would be employed.
• Your bearing hold to the CSC is your what?
• What is the role of the CSC with digital data computers?
• In navigation master mode, what TACAN feature is selected?
• What does a PRIMARY altitude setting do?
• The MUX transfers information around which system?
• ADF Definition
• Which of the following is a correct list of common interfaces used by mission computers to connect with sensors and actuators?
• Define deterministic timing constraints for a control loop running on a mission computer and how to verify worst-case latency.
• In TACAN air-to-air mode, the system is used to ___?
• MC switch 1K-C106 is which relay?
• Which approach is used to manage power budgets and thermal limits to maintain reliability in space or harsh environments?
• Transmit/Receive mode in TACAN does what?
• Which power supply is not among the ADF's three power sources?
• Which two elements constitute the Automatic Direction Finder?
• What is remote procedure call (RPC) in the context of distributed mission computers, and what challenges arise in real-time deterministic RPC?
• ADF Position fixing is achieved how?
• The TACAN receiver/transmitter performs which functions?
• Which of the following is a subsystem controlled by Mission Computers?
• Which systems are selected by the EEC?
• Where is the power schematic referenced?
• RADAR Altimeter operation is based on the measurement of time for an RF pulse to travel from the aircraft to the Earth's surface and back.
• The control converter provides an ADF valid signal and an ADF bearing signal to which unit?
• ADF audio error from your radios is your what?
• What is the primary benefit of timestamping subsystem events with a common master clock?
• An automatic direction finder is a _____?
• ADF power sources include which of the following?
• EMCON effects what systems?
• ADF indicates a course bearing in reference to what?
• During TACAN operation, what is the purpose of the suppression pulse?
• Which control is used to select the RADAR warning minimum altitude on the primary Height Indicator display?
• How does ECC memory work, and what errors does it detect and correct in mission-critical RAM?
• What is memory scrubbing, and why is it essential for maintaining data integrity in radiation-rich environments?
• Describe how a mission computer can support time-based scheduling for tasks and events, including calendars, time zones, and mission events.
• The TACAN transmits out an identification tone (ID tone) of 3 Morse code characters for station identification, the 3 character CW signal is transmitted ____.
• In fault management for mission computers, which function is responsible for localizing faults?
• The MX-9965/A Interface Blanker System provides what?
• What is a health monitoring dashboard in mission computer maintenance, and which metrics are critical?
• In Air-to-Air TACAN mode, which data cannot be detected?
• What is the purpose of a state machine in mission command software, and how should you design robust states and transitions?
• Which description best contrasts hot-swap capability with normal operation and identifies the protections that enable hot-swapping?
• Which unit provides the 26 VAC synchro reference for the ADF system?
• What approach helps achieve determinism in real-time RPC?
• Which TACAN setting is selected when the aircraft master mode is in Navigation?
• How does load balancing work in a dual-redundant mission computer with two CPUs, and what criteria determine failover direction?
• In fault management, what is the role of a failover controller?
• Explain how telemetry downlink bandwidth planning affects data handling on a mission computer.
• In TACAN transmit/receive mode, what information does the TACAN system provide?
• What does an Electronic Altimeter Receiver-Transmitter do?
• Which component supplies DC power to your CSC?
• Which signal is used to activate the ADF system?
• Regarding quadrantal air, the air is maximum where?
• The push-to-test switch on the Height Indicator is used to select which setting?
• Which statement about the TACAN ID tone is true?
• If one MC fails, the other automatically takes over which function?
• Which option best describes the secure boot components typically involved in a mission computer?
• Audio and visual warnings activate when the aircraft is at or below which altitude settings?
• Which statement describes a technique used to guarantee worst-case execution time (WCET) in real-time systems?
• Mission computer operation is dependent on what?
• What initiates the interrogation pulse when TACAN range is required?
• By plotting a two-station fix, the operator can determine what?
• The mission computer system (MC1) receives altitude information from which source?
• Radar altimeter component recognition: which item is a radar altimeter component?
• What is a data bus arbitration mechanism, and how does it prevent contention on shared interconnects?
• Which data is decoded by the TACAN receiver/transmitter from received pulses?
• In TACAN receive mode, what information does the system provide?
• ADF Position fixing method involves what?
• When the MC switches are in normal, what is supplied?
• What is Position Fixing?
• Is the radar altimeter affected by EMCON?
• What is the primary purpose of using redundant channels in a mission computer system?
• Which three signals does the CSC receive?
• What is the typical boot sequence from power-on to application launch?
• Which MC is responsible for Mission Accomplishment?
• What are the considerations for solid-state storage selection for mission computers subjected to radiation, wear, and temperature extremes?
• Which altitude setting does the height indicator use?
• Which of the following is a DC power supply for the ADF?
• The AS-3422/ARN-99 upper TACAN antenna operates in which frequency band?
• What is the concept of deterministic interrupt latency and how is it minimized in a mission computer?
• Which of the following best describes Quadrantal Error?
• The ADF receives 3 different power supplies, what are they?
• What happens when ADF switch 1 or 2 is selected?
• What happens if the watchdog timer is not pinged within its interval?
• In TACAN receive mode, what will the system provide?
• What provides interruption of the ADF operation if the receiver-transmitter is keyed?
• Which system component is responsible for updating the navigation display bearing with ADF data?
• A RADAR Altimeter consists of which of the following?
• What is the primary function of Mission Computers?
• What is the basic measurement principle of a radar altimeter?
• Describe software hazard analysis in safety-critical systems and how it informs design choices for mission computers.
• What does an A-395 Relay Assembly provide?
• Which statement defines deterministic timing in a real-time system and describes a common approach to guarantee WCET?
• What is the role of safety-critical software standards such as DO-178C or ECSS in mission computer development?
• Which item is a radar altimeter component?
• What is Electrical Disturbance?
• What are common watchdog design patterns beyond simple timeouts, and how do they enhance recovery?
• Which MC is responsible for Navigation?
• What is your CSC input?
• Which subsystems are controlled by the Mission Computers?
• On the Horizontal Indicator, which control sets the RADAR warning minimum altitude on the radar altimeter's secondary display?
• Which feature is least essential in a robust telemetry data pipeline?
• Channel 3 is used for what?
• In fault tree analysis, which event is typically a top-level failure mode indicating a total subsystem loss?
• Which statement differentiates hard real-time from soft real-time in mission computer systems?
• What is the primary purpose of the radar altimeter in flight displays?
• What is the purpose of safe states in hazard mitigation for mission computers?
• The directional antenna RF is modulated at _____ Hz.
• The Mission computer system uses the ADF information to what?
• Which ADF limitation is minimized by circuits in the antenna and calibration procedures?
• An ADF antenna receives signals in what range?
• Which statement best describes Precipitation Static's effect?
• Your ADF system determines what for your ground system?
• Which function do MC1 and MC2 perform?
• What is the primary use of TLS or IPsec in mission computer networks?
• Which statement about guardbands and clock skew management in distributed mission computers is true?
• IAC control receives the audio error signal and produces which signal?
• What is a typical ADF antenna?
• Through which component do MC1 and MC2 provide mode control and option select outputs?
• The aircraft initially interrogates the surface beacon at _________ in search mode.
• ADF operates in which frequency range?
• Which scheduling policy is typical for a mission computer's real-time operating system, and what does priority inheritance accomplish?
• Which ADF setting enables 115 VAC to the direction finder’s antenna motor?
• Which feature of solid-state storage provides the ability to detect and correct data errors during reads and over wear cycles?
• How would a mission computer implement time-of-day and mission-time synchronization between subsystems for coherent logging?
• Which instrument supplies altitude data to the MC system?