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L4 ADAS (Driver Assistance) — practice test

Studying for L4 (ADAS (Driver Assistance))? Overhaul Prep has 165 verified L4 questions written to the current task list — in the same formats the real exam uses (direct, Technician A/B, EXCEPT and most-likely-cause). Every answer comes with a written explanation, so you learn why instead of memorising a letter.

165L4 questions
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9,711questions in total
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Sample L4 questions

Straight from the bank — answers highlighted, with the explanation underneath.

Automotive long-range radar used for adaptive cruise control most commonly operates in which frequency band?

  1. 2.4 GHz
  2. 24 GHz
  3. 76-77 GHz
  4. 300 MHz
WhyLong-range ADAS radar operates in the 76-77 GHz band (short/mid-range historically used 24 GHz). The higher frequency gives the narrow beam and resolution needed to track vehicles at long distance.

Two technicians discuss ADAS calibration types. Technician A says static calibration uses fixed targets with the vehicle stationary. Technician B says dynamic calibration requires driving the vehicle at a specified speed. Who is correct?

  1. Technician A only
  2. Technician B only
  3. Both Technicians A and B
  4. Neither Technician
WhyStatic calibration uses stationary targets; dynamic calibration uses a road drive at OEM speed and conditions. Both statements are correct, and some vehicles require both.

A vehicle's adaptive cruise control intermittently loses the lead vehicle and a radar-blocked message appears in cold, snowy weather. The MOST likely cause is:

  1. A failed brake light switch
  2. Snow or ice packed over the front radar behind the emblem
  3. Low windshield washer fluid
  4. Worn wiper blades
WhyCold-weather blockage messages point to snow or ice accumulation over the radar aperture, temporarily blinding the sensor.

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