Backbase Senior IOS Developer Interview Questions and Answers

Q1. Explain core data stack
Ans. 
Core data stack is a set of classes that work together to manage the model layer of an iOS application.
• Consists of Managed Object Model, Persistent Store Coordinator, and Managed Object Context

• Managed Object Model defines the data model schema

• Persistent Store Coordinator handles interactions with the underlying data store

• Managed Object Context is used to manage the lifecycle of managed objects
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Function to find sum of adj numbers

Q1. Reactive forms in angular
Ans. 
Reactive forms in Angular are a way to build forms in a reactive and scalable way.
• Reactive forms use an underlying data model to manage form data.

• They allow for dynamic form creation and validation.

• They can be used with complex form structures and nested forms.

• They provide a more scalable and maintainable approach to form development.

• Example: Creating a reactive form with FormBuilder in Angular.
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Q2. Dependency injection
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Platform - Mettl
3 Questions of medium level difficulty to do in 2 hours, typically contain concepts like DSA, DP etc.

Q1. What is structure padding?
Ans. 
Structure padding is the insertion of unused bytes between structure members to align them on memory boundaries.
• Padding is added to ensure that each member of a structure starts at a memory address that is a multiple of its size.

• Padding is compiler-dependent and can vary between different platforms and architectures.

• Padding can affect the size of a structure and the performance of the program.

• Example: struct example { ...read more
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Q2. College Project discussion
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Q3. Form a dictionary from name.
Ans. 
Forming a dictionary from name
• Create an empty dictionary

• Iterate through each character in the name

• Add the character as a key and its frequency as value in the dictionary
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1 hour 3 questions easy to medium leetcode.

Q1. Tell me about yourself, availability, visa-related questions
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Dynamic programming questions, longg time to complete the 2 questions

Problem solving : a clock with 3 hands, no numbers written, guess what it is

Q1. Basic node.js and javascript.
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Q1. More discussion towards the existing project.
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There will be 3 coding questions, Easy, moderate and hard level.

Q1. 2nd round will be technical round, they will ask mostly theoretical coding questions(Mostly array, Linked List), puzzles (Geeks Puzzles are enough).
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3 hours was the duration of the test. 3 questions were asked