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694 imaging assistant interview questions shared by candidates

If there is one piece of material with reflective index gradually changed inside from left to right. Now we know the light travels faster on the left hand side compared to right. If we want to hit the target vertically upside, what direction should the incoming light goes?
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Graduate Imaging Geophysicist

Interviewed at Viridien

3.4★
Nov 6, 2019

If there is one piece of material with reflective index gradually changed inside from left to right. Now we know the light travels faster on the left hand side compared to right. If we want to hit the target vertically upside, what direction should the incoming light goes?

I attended the automated video interview. It started with introducing myself, then explaining a CGG technology, the physics and mathematics behind it. It was followed by high-school level mathematics and optics questions, like a linear function, mirages, rainbows, etc. Questions about a research project I had done and how it may help CGG. Why interested in this role? Any example of going beyond your duties/ responsibilities to achieve an objective.
avatar

Graduate Imaging Geophysicist

Interviewed at Viridien

3.4★
Jun 13, 2021

I attended the automated video interview. It started with introducing myself, then explaining a CGG technology, the physics and mathematics behind it. It was followed by high-school level mathematics and optics questions, like a linear function, mirages, rainbows, etc. Questions about a research project I had done and how it may help CGG. Why interested in this role? Any example of going beyond your duties/ responsibilities to achieve an objective.

Q1: A and B are flipping a coin. A flips first, and then B. What is the probability of A winning first? Q2: What is the volume of a cube inscribed in a sphere with radius 1? Q3: There are 25 horses, each of which runs at a constant speed that is different from the other horses. Since the track only has 5 lanes, each race can have at most 5 horses. If you need to find the 3 fastest horses, what is the minimum number of races needed to identify them?
avatar

Seismic Imaging Analyst

Interviewed at Viridien

3.4★
Feb 24, 2024

Q1: A and B are flipping a coin. A flips first, and then B. What is the probability of A winning first? Q2: What is the volume of a cube inscribed in a sphere with radius 1? Q3: There are 25 horses, each of which runs at a constant speed that is different from the other horses. Since the track only has 5 lanes, each race can have at most 5 horses. If you need to find the 3 fastest horses, what is the minimum number of races needed to identify them?

Two identical sound waves travel via different ray paths to a detector. Destructive interference between the two waves is observed at a frequency of 100 Hz. Given the speed of sound in the medium as 1500 m/s can you determine the difference in path length?
avatar

graduate imaging geophysicist

Interviewed at Viridien

3.4★
Apr 4, 2023

Two identical sound waves travel via different ray paths to a detector. Destructive interference between the two waves is observed at a frequency of 100 Hz. Given the speed of sound in the medium as 1500 m/s can you determine the difference in path length?

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