Zoom Technologies Software Engineer Interview Questions and Answers

Round duration - 40 minutes
Round difficulty - Easy

Technical round with questions based on DSA.

Q1. 
Reverse a Number Problem Statement
Create a program to reverse a given integer N. The output should be the reversed integer.
Note:
If a number has trailing zeros, their reversed version should not inclu...read more
Ans. 
Reverse a given integer while excluding trailing zeros.
• Create a program to reverse the given integer by converting it to a string and then reversing it.

• Remove any trailing zeros from the reversed string before converting it back to an integer.

• Handle the constraints of the input integer being between 0 and 10^8.

• Example: For input 1230, the output should be 321.
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Q2. 
Reverse a Linked List Problem Statement
You are given a Singly Linked List of integers. Your task is to reverse the Linked List by changing the links between nodes.
Input:
The first line of input contai...read more
Ans. 
Reverse a given singly linked list by changing the links between nodes.
• Iterate through the linked list and reverse the links between nodes.

• Use three pointers to keep track of the current, previous, and next nodes.

• Update the links while traversing the list to reverse it.

• Return the head of the reversed linked list.
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Q3. What is the difference in C++ between 'new int[5]' and 'malloc(5 * sizeof(int))'?
Ans. 
new int[5] is C++ specific and initializes the array with default values, while malloc(5 * sizeof(int)) is a C function and does not initialize the array.
• new int[5] is C++ specific and calls constructors for each element in the array.

• malloc(5 * sizeof(int)) is a C function and does not call constructors, leaving the array uninitialized.

• new int[5] returns a pointer to the first element of the array, while malloc(5 * siz...read more
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Q1. Tell me about yourself.
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Psuedo code based test

Q1. Coding question in any language of choice
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Q1. Multiple questions based on networking, OS, DSA, ML, puzzles and one coding question as well
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Q1. Interview with manager - combination of technical and behavioral
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Q1. Interview with Director - Technical theory questions based on networking
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Q1. No specific questions
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Q1. Question on OOPS, c++
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Q2. Questions on resume
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General aptitude questions

Q1. Questions based on resume
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Q1. More based on resume but from managers
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Basic coding questions

Q1. Core subjects like Operating System, Networking
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Q2. TCP, UDP protocols, working
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Q3. OSI, TC/IP working model
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Mcqs + 2 coding questions fairly easy one

Q1. Implement something which you donot know by researching
Ans. 
Implementing a neural network for image recognition
• Research different types of neural networks such as Convolutional Neural Networks (CNNs) and Recurrent Neural Networks (RNNs)

• Study how to preprocess image data and feed it into the neural network

• Learn about popular deep learning frameworks like TensorFlow or PyTorch

• Experiment with training a neural network on a dataset like MNIST for digit recognition
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Q1. Traversing the web pages which has links to other web pages in specific orders
Ans. 
Traversing web pages with links in specific orders requires web scraping and following the links recursively.
• Use web scraping tools like BeautifulSoup or Scrapy to extract links from web pages.

• Implement a recursive function to follow the links in specific orders (e.g. depth-first or breadth-first).

• Track visited pages to avoid infinite loops or revisiting the same pages.

• Handle errors and exceptions when accessing web pa...read more
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Q2. Heap implementation
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