Senior Mobile Developer Interview Questions in United States
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Senior Mobile Developer interview questions shared by candidates
Hardest Q was: Here's a binary tree: find the longest path within it. So, find a path between any two leaf nodes, where the path is the longest.
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class Solution{ int ans[] = new int[1]; //O(n) public int efficientDia(TreeNode root) { if(root == null) return 0; int left = efficientDia(root.left); int right = efficientDia(root.right); ans[0] = Math.max(ans[0], 1 + left+ right); return 1+ Math.max(left, right); } //O(n^2) public int getDiameter(TreeNode root) { if(root == null) return 0; int leftHeight = getHeight(root.left); int rightHeight = getHeight(root.right); if(ans[0] < 1 + leftHeight + rightHeight) { ans[0] = 1 + leftHeight + rightHeight; } return Math.max(getDiameter(root.left), getDiameter(root.right)); } Less
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int ans[] = new int[1]; //O(n) public int efficientDia(TreeNode root) { if(root == null) return 0; int left = efficientDia(root.left); int right = efficientDia(root.right); ans[0] = Math.max(ans[0], 1 + left+ right); return 1+ Math.max(left, right); } //O(n^2) public int getDiameter(TreeNode root) { if(root == null) return 0; int leftHeight = getHeight(root.left); int rightHeight = getHeight(root.right); if(ans[0] < 1 + leftHeight + rightHeight) { ans[0] = 1 + leftHeight + rightHeight; } return Math.max(getDiameter(root.left), getDiameter(root.right)); } private int getHeight(TreeNode root) { // TODO Auto-generated method stub if(root == null) return 0; return Math.max(getHeight(root.left), getHeight(root.right))+1; } Less
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Indians at all companies always ask tree questions, it makes them giggle inside. I know, because I'm half indian and have interviewed people... tee hee hee Less
How do you deal with sensitive financial data of a user on your device?
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The device keychain. There were many questions, where even if you answered that you did not have experience in this avenue, what or how would you go about it? Less
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Hi.Could you please tell the questions that are asked for you for this role.I have an interview this friday and it would be a great help.Thanks alot Less
Normal Process with Basic and according to JD & Requirement, Question with flexible and free mind and process will finish within week.
1 Answers↳
Na
During the offline tech test I was asked to produce a list view(quite common for a mobile role position) of tracks along with details view that would present things in a browser. MVVM pattern was the architectural approach of preference. Also I shouldn't make use of any third party code like for networking or image downloading. Code should be hosted in an online version control, like GitHub.
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Just followed the approach I have taken for other similar solutions in the past. They came back to me through the recruiter (after probably he chased them). No feedback or anything, just saying they are not looking to progress. Have asked for FB, but nothing. I believe that if someone has spent 4-5 hours working on an unpaid assessment, it would be at least respectful to provide 2-3 highlights of why they have failed. Especially if task have been good enough to progress you in the next stage in the past. Less
What is an optional in the Swift language and explain how it is implemented?
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This is another Swift feature that anyone who does Swift will have experience with, but might not remember the actual formal name. Simply add a question mark to the end of the type to allow that variable to also be nil. That is, “var myName : String?” allows the variable to either be a string or nil. Less
Here’s a list of object types. Which ones can be retained and which ones can’t be? String, Array, NSInteger, Dictionary, NSNumber
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The trick here is to know which of these types are actual objects and which ones are base or C-types. In this list, NSInteger is a C-type, like “int” or “long”, and is not an object that can be alloc/init’ed. Less