Zoom Video Communications Software Engineer Interview Questions and Answers for Experienced

2 coding question were asked

Q1. Sum on node in binary tree
Ans. 
Recursively sum the values of nodes in a binary tree
• Use a recursive function to traverse the tree and add the values of each node

• Base case: if the current node is null, return 0

• Recursive step: return the sum of current node value, left subtree sum, and right subtree sum
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Q2. Lp question asked
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Q1. Question on string manipulation
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Q2. Lp question asked
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Q1. Managerial question on projects were asked
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Q2. Past experience and leadership question
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Q1. Internal working of Hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• To retrieve a value, the key is hashed a...read more
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Q1. Explain Oops Concept
Ans. 
Oops concept is a programming paradigm that focuses on objects and classes to organize code and promote reusability.
• Oops stands for Object-Oriented Programming

• Key concepts include classes, objects, inheritance, polymorphism, and encapsulation

• Classes are blueprints for objects, defining their properties and behaviors

• Objects are instances of classes, representing real-world entities

• Inheritance allows classes to inherit p...read more
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Q2. Explain SOLID Principles
Ans. 
SOLID principles are a set of five design principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable...read more
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Q3. Explain auto layout
Ans. 
Auto layout is a constraint-based layout system used in iOS and macOS development to create user interfaces that adapt to different screen sizes and orientations.
• Auto layout allows developers to create flexible and adaptive user interfaces by defining relationships between UI elements.

• Constraints are used to specify the position and size of UI elements relative to each other or to the parent view.

• Auto layout automatica...read more
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Q4. Explain Content hugging
Ans. 
Content hugging is a constraint used in Auto Layout to determine how much a view resists growing beyond its intrinsic content size.
• Content hugging priority is a value between 1 and 1000, with higher values indicating a stronger resistance to growing.

• Views with higher content hugging priorities will try to maintain their intrinsic content size rather than expand to fill available space.

• Content hugging is often used in c...read more
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Q5. Explain retain cycle
Ans. 
Retain cycle occurs when two objects hold a strong reference to each other, preventing them from being deallocated.
• Occurs in iOS development when two objects have strong references to each other

• Can lead to memory leaks as the objects are never deallocated

• Prevented by using weak or unowned references in Swift
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Q1. What technical skills you've learned so far in the college
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Q2. Where do you see yourself in the next 5 years.
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Q3. Reverse a linked list
Ans. 
Reverse a linked list by changing the pointers direction
• Iterate through the linked list and change the direction of pointers

• Use three pointers - prev, current, next to reverse the list

• Update the head pointer to point to the new first node
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Q4. General dbms, os, and cn questions
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Q1. CAN protocol frames
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Q2. UDS services ids
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Q1. Only one round of c language and then shortlisted
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Q1. Sql queries, java coding
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Q1. Basics of your technical skills
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Q1. More Projects related questions
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