AET Digital Electronics and Microprocessors 3

Question 1

Which test instrument captures and simultaneously displays multiple digital signal states to aid in troubleshooting microprocessor-based avionics?

Accepted Answer

Logic analyzer

Answer

Multimeter

Answer

Function generator

Answer

Impedance bridge

Question 2

What is the primary purpose of BITE (Built-In Test Equipment) in avionics systems?

Accepted Answer

It continuously monitors and tests system functions automatically

Answer

It requires external test equipment to initiate each test

Answer

It operates only during scheduled ground maintenance

Answer

It fully replaces all ground support equipment

Question 3

What distinguishes a microcontroller from a standalone microprocessor?

Accepted Answer

A microcontroller integrates CPU, memory, and I/O peripherals on a single chip

Answer

A microcontroller operates at a faster clock speed

Answer

A microcontroller uses only RISC architecture

Answer

A microcontroller has a wider data bus than a microprocessor

Question 4

Why is EEPROM commonly used for storing calibration and configuration data in avionics line replaceable units (LRUs)?

Accepted Answer

It can be electrically erased and reprogrammed in-circuit without physical removal

Answer

It is the fastest memory type available

Answer

It supports unlimited write cycles with no degradation

Answer

It requires no power to perform read operations

Question 5

When a logic probe indicates a 'pulsing' or 'active' state at a test point, this means the signal is:

Accepted Answer

Rapidly toggling between HIGH and LOW states

Answer

Stuck at a constant HIGH level

Answer

Stuck at a constant LOW level

Answer

Floating with no valid logic level

Question 6

What is the primary function of a watchdog timer in an avionics microprocessor system?

Accepted Answer

Reset the processor if software fails to respond within a defined time interval

Answer

Track total elapsed flight hours for maintenance scheduling

Answer

Monitor and log bus voltage levels to detect power anomalies

Answer

Synchronize timing across multiple ARINC 429 data buses

Question 7

Binary-Coded Decimal (BCD) represents each individual decimal digit using how many bits?

Accepted Answer

4 bits

Answer

2 bits

Answer

8 bits

Answer

16 bits