Apple 26NG SDE VO|11.18 A Round of Coding - Follow-up Explosions of the Many Kinds

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"It's not that the questions are hard, it's that follow-up doesn't give you a break."

This year's fall recruiting Apple Newcomer posts are really getting harder with the naked eye. Our cadet's VO experience was typical:
The coding itself is solid, but there are so many follow-ups that you could have a small workshop on it.
Overall, though, the pacing was solid, the delivery was smooth, the logic was clean, and the interviewer was very buy-in throughout.

Here's a complete recap of the round's experience for you, following the real process.

Apple 26NG SDE VO

Background of trainees

  • Master in CS, American University
  • Internship in backend + data cleansing related
  • Volume of questions 250+
  • Familiarity with double pointers, binary search, sliding window
  • English expression is not bad, just on the fast side, we did a couple of tempo drills ahead of time
  • VO coaching by Programhelp for this round (structured narrative + follow-up preview)

This round of questions eats up a lot of basic skills + thought structure, which just happens to be his strong suit.

Opening experience: American relaxation, but watching you from the shadows

The interviewer is a typical American guy, with a bright voice and a few pleasantries right off the bat. But here's the thing about Apple VOs:
Even if the atmosphere is relaxed, he's still judging whether your delivery is clear, organized, and on-topic.

The opening five minutes were spent talking about all of this:

  • What modules did the internship
  • The trickiest bug I've ever encountered
  • Why you left your last company
  • What's the main thing you've been working on lately?
  • Which Apple teams are interested?

The trainees answered naturally, without piling up keywords or signs of memorization.
Lao listens quite attentively, then laughs a little:

"Alright, let's get to the coding part."

It's official.

Coding: Squares of a Sorted Array

Title Content:

Given a sorted integer array, return a new array of the squares of each number, sorted in non-decreasing order.

The trainee first verbally walked through the ideas (very critical):

  • Original array is sorted
  • Possibly larger after squaring the negative area
  • Shrink to the center with the left and right double pointers
  • Whoever squares the larger number starts at the end of the result.

"Makes sense."
The trainee begins to write code.

def sortedSquares(nums).
    left, right = 0, len(nums) - 1
    res = [0] * len(nums)
    idx = len(nums) - 1

    while left  abs(nums[right]).
            res[idx] = nums[left] * nums[left]
            left += 1
        else: res[idx] = nums[left] * nums[right].
            res[idx] = nums[right] * nums[right]
            res[idx] = nums[right] * nums[right]
        right -= 1

    return res

I also volunteered to test two cases after writing it:
[-4,-1,0,3,10][0,1,9,16,100]
[-7,-3,2,3,11][4,9,9,49,121]

The interviewer nods, "Good. now let's explore some variations."

The result is a straight-forward, Apple-inspired follow-up, with three consecutive follow-up questions.

Follow-up Full process (all really asked)

Follow-up 1: Can we do O(1) Space? arrays allow modification

The trainee gives the program on the spot:

  • Finding the positive and negative index
  • Decreasing absolute value of the left negative area
  • The right non-negative region is increasing
  • With the double pointer merge
  • Because it's in-place, you need to use insertion + local shift

Then the in-place version is knocked out on site.
The interviewer was very pleased, especially as the trainee had clearly stated:

  • in-place adds complexity
  • Decreased code readability
  • But the space meets the requirements

Very plus.

Follow-up 2: Lots of zeros in an array, can it be optimized?

The points given by the trainees were spot on:

  • Count the number of zeros first.
  • zero squared is still zero, just batch fill the front part
  • The remaining positive and negative areas are merged.
  • More stable time, no need to compare zero side

The interviewer nodded again, "Good observation."

Follow-up 3: Can we do O(n) if the inputs are not sorted?

The logic of the trainee's response was very standard:

  • If there is no value range restriction:
    → No, optimality still requires ordering O(n log n)
  • If the range is limited and the integers are not large:
    → can do O(n) with counting array
  • Decide if you can optimize based on domain

The presentation is structured without being wordy.

Overall VO performance: stable, fast, clear and logical

Throughout the round, the rhythm was a "solid" one:

  • First the idea and then the code.
  • follow up Structured answers to each question
  • Code is easy to read, not showy
  • Active complementary complexity and trade-off
  • No haste, no flutter, no nonsense

The interviewer is "persuaded" throughout.
An evaluation was also given at the end:

"I like how you articulate your thoughts."

Overall, they are of the steady-over type.

How Programhelp VO Assist Works

The biggest difficulty with Apple's coding VOs isn't the questions at all:

  • follow-up High density
  • fast-paced
  • Requires structured expression
  • You can't panic, you can't answer randomly, you can't talk too much.

Programhelp in VO assist On can help you:

  • Real-time voice alerts (clarify / edge case / trade-off)
  • Simulate Apple's high-frequency follow-up so you can step over the pitfalls ahead of time
  • Helps you train your "structured response rhythm".
  • Adjust the speed of speech and sentence patterns to sound more professional
  • The coding site prompts for clearer naming and more concise comments.

So even though the number of follow-ups in this round was exaggerated, the trainees were still steady throughout.

author avatar
Jory Wang Amazon Senior Software Development Engineer
Amazon senior engineer, focusing on the research and development of infrastructure core systems, with rich practical experience in system scalability, reliability and cost optimization. Currently focusing on FAANG SDE interview coaching, helping 30+ candidates successfully obtain L5/L6 Offers within one year.
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