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Google IOS Engineer interview questions

based on 16 ratings - Updated Oct 28, 2025

Difficult interview difficulty

Mixed interview experience

How others got an interview

69%
Recruiter
Recruiter
31%
Applied online
Applied online

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16 interviews

IOS Engineer Interview

Jun 17, 2022

Anonymous Interview Candidate

No offer

Negative experience

Average interview

Application

I applied through a recruiter. I interviewed at Google (New York, NY)

Interview

The interview started with an intro call with HR. She described quite a standard interview process in the company: 1 screening phone interview and 5 interviews for virtual on-site. The onsite interview did not have a system design part. 5 coding challenges and one behavioral interview. I got to interview with the hiring manager but I failed one of the onsite interview challenges, so the hiring committee denied my application. Even though I did not get offer from google, I've received from another large company. I strongly recommend the following video for your preparation: "Dynamic Programming - Learn to Solve Algorithmic Problems & Coding Challenges" (can't use the link)

Interview questions [5]

Question 1

Screening question: Write a "recursiveDescription" function for a UIView that prints out subviews tree in a following example: <UIView> | <UIScrollView> | | <UIView> | | | <UILabel> | <UIView> | | <UILabel> A similar example could be a recursive iteration in folders/files or a tree.

1 Answer

Question 2

Onsite 1: A question is similar to "canConstruct". Write a function that takes a string and an array of strings as input and returns a boolean if you can construct a string in the input out of substrings in the attay. Alternatively, you might need to return an array of substrings

1 Answer

Question 3

Write a function that takes an array of floats (or doubles) as a parameter and returns a longest subsequence of floats where all elements have differences not more than 1 between each other. For example input: [4.2, 5.3, 4.6, 9.8, 1.5, 5.2, 4.7] output: [4.2, 4.6, 5.2, 4.7], -> if you find the difference between any pair of elements here, it would be less or equal then one.

1 Answer

Question 4

A challenge to merge pairs. For example, find free time between two calendars.

Answer question

Question 5

Recursive folder traversal in a file system. Very similar to the first screening phone interview question. You get a folder-like data structure as an input and return a string describing a tree structure. As an alternative, each subfolder might contain files and you need to return a count of files contained in the folder and it's subfolders.

1 Answer

IOS Engineer Interview

Apr 8, 2022

Anonymous Interview Candidate

No offer

Negative experience

Difficult interview

Application

I applied online. I interviewed at Google (Chicago, IL) in Feb 2020

Interview

I saw a job posting online. I applied online and submitted my resume. I was contacted about an interview with the hiring manager. It was a short hr/background interview followed by one technical question.

Interview questions [1]

Question 1

"This one stumped a team of engineers for 3 months, but we finally figured it out. A client wants to display JPG images on their website but wants to prevent copying. How would you do that?"

1 Answer

IOS Engineer Interview

Feb 25, 2021

Anonymous Interview Candidate

No offer

Positive experience

Average interview

Application

I applied through a recruiter. I interviewed at Google (Vancouver, BC)

Interview

Online technical interview on google doc. Asked me easy question at first and the difficulty built up as the interview went on. The interviewer was very kind and was trying to help when you are stuck.

Interview questions [1]

Question 1

Building tableview with data in it. Explain the concurrency/threading issue behind it.

Answer question

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