Abc Technologies Software Developer Interview Questions and Answers

Asking the dp and tree and other

Q1. Asking the project based question and
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Q1. Some question asking base on cultural base and resume based
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Q1. How is GIL and how python handle multi threading
Ans. 
GIL stands for Global Interpreter Lock in Python, which limits execution of multiple threads at once.
• GIL is a mutex that protects access to Python objects, preventing multiple threads from executing Python bytecodes at once.

• Due to GIL, Python threads are not suitable for CPU-bound tasks but are still useful for I/O-bound tasks.

• To handle multi-threading in Python, one can use multiprocessing module or asynchronous progr...read more
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Q2. Explain How React works under the hood.
Ans. 
React uses a virtual DOM to efficiently update the actual DOM based on changes in state or props.
• React creates a virtual DOM representation of the actual DOM.

• When state or props change, React compares the virtual DOM with the actual DOM to determine the minimal set of changes needed.

• React then updates the actual DOM efficiently to reflect the changes.
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Q1. Write a program of bubble sort.
Ans. 
Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order.
• Initialize an array of strings to be sorted

• Repeat until no swaps are needed: Compare adjacent elements and swap if necessary

• Continue until the entire array is sorted
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Oops concept, java basics, sqlqueries

Q1. Technical knowledge tested.
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LEVEL UP CODING TEST

Q1. What is the work in office
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Q2. What is timings in day
Ans. 
Timings in a day refer to the different periods of time that make up a 24-hour day.
• A day is typically divided into morning, afternoon, evening, and night

• Different cultures may have different ways of dividing a day

• Timings can also refer to specific times for events or activities
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Q1. How much salary per month
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Q2. What is timing in the day
Ans. 
Timing in the day refers to the different periods or divisions of time within a 24-hour cycle.
• Timing in the day includes morning, afternoon, evening, and night.

• It helps in organizing daily activities and scheduling tasks.

• Different cultures may have different names or divisions for timing in the day, such as siesta or tea time.

• Timing in the day can also be represented using the 12-hour or 24-hour clock system.
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Q3. How to procesa I share my details
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Q4. Please tell me the process
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Round duration - 90 minutes
Round difficulty - Medium

2 Programing Questions and 30 MCQs. 
Programing questions were medium with one being array manipulation and other being graph based. 

MCQ were from OOPs concepts, SQL, Operating System and Network, prepare in depth knowledge for all the topics.

Q1. 
Count Pairs Problem Statement
You are given an array A of length N consisting only of integers. Additionally, you are provided with three integers X, Y and SUM. Your task is to count the number of pairs (...read more
Ans. 
Using HashMap or self balancing BST for fastest result.
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Q2. 
Longest Substring Without Repeating Characters Problem Statement
Given a string S of length L, determine the length of the longest substring that contains no repeating characters.
Example:
Input:
"abac...read more
Ans. Brute Force
In the brute force approach, we will use two nested loops. The outer loop is used to select the starting index of the substring and the inner loop is used to fix the ending index of the substring. After selecting the substring, we will use another loop (or a method) to check whether the substring contains all unique characters or not using a HashSet.
Space Complexity: O(n)Explanation:
O(L), where L is the len...read more
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Round duration - 90 minutes
Round difficulty - Medium

Questions on SQL and DBMS were asked in this round

Q1. What are the ACID properties in DBMS?
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Q2. Can you explain the different levels of data abstraction in a DBMS?
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Q3. What are constraints in SQL?
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Round duration - 30 minutes
Round difficulty - Medium

HR round was pretty much a casual conversation about why optum, work location, joining availablity and what qualities you would like to highlight about yourself.

Q1. Why do you want to work at Optum, and what qualities would you like to highlight?
Ans. 
Tip 1 : Go through wiki page or google about the working of the company
Tip 2 : Qualities should more aligned to the company's values.
Tip 3 : Show your interest in working with the organisation and how will you contribute to the team.
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Simple technical maths calculations,

Writing a Jawa coding in small projects