Dish Network IT Technician Interview Questions and Answers

Technical aspects about linked list,trees, stacks

Topic related to humanities

I was given a case study to write multiple outputs by lookinginto a program.

Q1. What is MFS in abinitio?
Ans. 
MFS in Abinitio stands for Multi-File System, which is a feature that allows Abinitio graphs to read/write data from multiple files simultaneously.
• MFS allows parallel processing of data from multiple files in Abinitio graphs

• It helps in improving performance by distributing the workload across multiple files

• MFS can be configured to read/write data from/to different file systems or locations

• Example: Using MFS, a graph ca...read more
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Q2. What is MFS in abinitio
Ans. 
MFS in Abinitio stands for Multi-File System, which is a parallel processing framework for handling large volumes of data.
• MFS allows for efficient processing of large data sets by distributing the workload across multiple files and nodes.

• It provides fault tolerance and scalability by replicating data across multiple nodes.

• MFS is commonly used in Abinitio graphs to optimize data processing performance.

• It helps in improv...read more
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Q1. JavaScript prototype sorting function
Ans. 
JavaScript prototype sorting function for arrays of strings
• Use the Array.prototype.sort() method to sort an array of strings

• Pass a compare function to specify the sorting order

• Example: ['banana', 'apple', 'cherry'].sort((a, b) => a.localeCompare(b))
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Q2. Promise polyfill from scratch
Ans. 
Creating a Promise polyfill from scratch involves implementing the Promise API using callbacks and handling asynchronous operations.
• Understand the Promise API and its methods (resolve, reject, then, catch)

• Implement a constructor function that takes an executor function as an argument

• Handle asynchronous operations using callbacks and setTimeout

• Implement the then and catch methods to handle success and error cases respec
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Q3. React hooks -useEffect useMemo
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Q1. Session Management in applications
Ans. 
Session management is the process of securely managing user sessions in web applications.
• Use cookies or tokens to track user sessions

• Implement session timeout to prevent unauthorized access

• Store session data securely on the server side

• Use HTTPS to encrypt session data during transmission
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Q2. Why react is fast than other frameworks
Ans. 
React is faster than other frameworks due to its virtual DOM, efficient diffing algorithm, and use of server-side rendering.
• React uses a virtual DOM which allows it to update only the necessary components instead of re-rendering the entire page.

• React's efficient diffing algorithm compares the virtual DOM with the actual DOM to minimize updates and improve performance.

• React supports server-side rendering, which can impr...read more
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Round duration - 30 Minutes
Round difficulty - Easy

In this round, Interviewer tried to judge if my basics are clear or not. 
He focused majorly on CS fundamentals.
He was pretty cooperative and gave me time after asking questions.

Q1. Have you ever solved a complex Java problem on your own?
Ans. 
Yes, I have solved a complex Java problem on my own.
• I once had to optimize a large-scale Java application by implementing multithreading to improve performance.

• I successfully debugged a memory leak issue in a Java program by analyzing heap dumps and identifying the root cause.

• I designed and implemented a custom data structure in Java to efficiently solve a specific problem.
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Q2. 
N-th Fibonacci Number Problem Statement
Given an integer ‘N’, your task is to find and return the N’th Fibonacci number using matrix exponentiation.
Since the answer can be very large, return the answer ...read more
Ans. 
The task is to find the Nth Fibonacci number using matrix exponentiation and return the answer modulo 10^9 + 7.
• Implement a function to find the Nth Fibonacci number using matrix exponentiation.

• Return the answer modulo 10^9 + 7 to handle large values.

• Use the formula F(n) = F(n-1) + F(n-2) with initial values F(1) = F(2) = 1.

• Optimize the solution to achieve better than O(N) time complexity.

• Consider solving the problem us...read more
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Q3. 
Swap Kth Elements in an Array
Given an array ARR of size N, perform the operation to swap the Kth element from the beginning with the Kth element from the end of the array.
Example:
Input:
N = 5, K = 2
...read more
Ans. 
Swap Kth elements in an array with given constraints.
• Create a function that takes the array, K value, and size of the array as input

• Swap the Kth element from the beginning with the Kth element from the end

• Handle edge cases like K being out of bounds or array size being less than 2
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Round duration - 30 minutes
Round difficulty - Medium

It was in late evening, interviewer was quite cool and asked me quite basic things about myself.

Q1. 
Covid Vaccination Distribution Problem
As the Government ramps up vaccination drives to combat the second wave of Covid-19, you are tasked with helping plan an effective vaccination schedule. Your goal is...read more
Ans. 
Given constraints and rules, maximize vaccines administered on a specific day during a vaccination drive.
• Iterate through each test case and calculate the maximum number of vaccines administered on the specified day.

• Distribute the available vaccines evenly across the days while adhering to the rules.

• Ensure that the sum of vaccines administered does not exceed the maximum allowed.

• Maximize the vaccines administered on the
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