ASG Technologies Senior Software Engineer Interview Questions and Answers

Q1. Explain technical challenges you have come across and how did you overcome it?
Ans. 
I faced a technical challenge while implementing a complex algorithm for real-time data processing.
• Identified the bottleneck in the algorithm by profiling the code

• Optimized the algorithm by implementing data structures and algorithms with lower time complexity

• Tested the optimized solution thoroughly to ensure correctness and performance

• Collaborated with team members to brainstorm alternative approaches
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Q2. Explain the main feature of JavaScript frameworks
Ans. 
JavaScript frameworks provide pre-written code to simplify and speed up web development.
• Helps in organizing code and improving code quality

• Provides reusable components for faster development

• Offers built-in features like routing, state management, and data binding

• Examples: React, Angular, Vue
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Aptitude test with aptitude based questions

Q1. What is variable hoisting.
Ans. 
Variable hoisting is a behavior in JavaScript where variable declarations are moved to the top of their scope during compilation.
• Variable declarations are hoisted to the top of their function or global scope.

• Only the declarations are hoisted, not the initializations.

• This can lead to unexpected behavior if variables are accessed before they are declared.
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Q2. What is closures in js
Ans. 
Closures in JavaScript allow functions to access variables from an outer function even after the outer function has finished executing.
• Closures are created whenever a function is defined within another function.

• Inner functions have access to the outer function's variables even after the outer function has returned.

• Closures are commonly used to create private variables and functions in JavaScript.

• Example: function outer...read more
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Q1. Machine coding: Design in-memory document search
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Q1. HLD: Design a ad-click aggregation service
Ans. 
Design an ad-click aggregation service for tracking and analyzing ad clicks.
• Use a distributed system to handle high volume of ad click data

• Implement real-time processing for immediate insights on ad performance

• Utilize a database to store aggregated ad click data for reporting and analysis
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Two simple coding questions were asked.

One multithreading questions was asked and few theoretical questions.

Q1. Few code snippets were provided on OOPs and result was asked.
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Q2. Sql query was asked.
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Q3. Two more rounds are still left
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Q1. Basic Java and Android and kotline
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Q1. Related to Version control
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Q1. Basic policy and immediate joining related
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Trees, Arrays, DP, Graphs, Leetcode Questions

Q1. Personal Projects
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Q2. System design interview, HP Products
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Q1. Find the duplicates in an array.
Ans. 
Find duplicates in an array of strings.
• Iterate through the array and store each element in a hash set.

• If an element is already in the hash set, it is a duplicate.

• Return a list of all duplicates found.
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Q2. Delete a node from Linked
Ans. 
To delete a node from a Linked List, update the pointers of the previous node to skip the node to be deleted.
• Set the next pointer of the previous node to skip the node to be deleted

• Update the next pointer of the node before deletion to point to the node after deletion

• Free the memory of the node to be deleted
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Q1. Tell me about what is completable future
Ans. 
CompletableFuture is a class introduced in Java 8 to represent a future result of an asynchronous computation.
• CompletableFuture can be used to perform tasks asynchronously and then combine their results.

• It supports chaining of multiple asynchronous operations.

• It provides methods like thenApply, thenCompose, thenCombine, etc. for combining results.

• Example: CompletableFuture future = CompletableFuture.supplyAsync(() -> 1
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