Visions Software Engineer Interview Questions and Answers

Two DSA ques were asked. One easy and one medium.

Q1. Project discussion and some DSA ques
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Q1. Standard hr question
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Q1. Questions about JavaScript, different types of DataTypes,
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Q2. Write code to add elements dynamically
Ans. 
Adding elements dynamically to an array in code
• Use push() method to add elements to an array in JavaScript

• In Python, use append() method to add elements to a list

• In Java, use ArrayList and add() method to dynamically add elements
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Q3. What is Hoisting
Ans. 
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope.
• Variable and function declarations are hoisted to the top of their scope during the compilation phase.

• Only the declarations are hoisted, not the initializations.

• Function declarations take precedence over variable declarations when hoisted.
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Q1. Current CTC, Experience
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Q2. What is expected CTC
Ans. 
Expected CTC should be based on industry standards, experience, skills, and location.
• Research industry standards for Software Engineer salaries

• Consider your experience level and skills when determining expected CTC

• Take into account the cost of living in the location of the job

• Negotiate based on the job responsibilities and market demand
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Q1. Tell me about Yourself
Ans. 
I am a passionate software engineer with experience in developing web applications and a strong background in computer science.
• Experienced in developing web applications using technologies like HTML, CSS, JavaScript, and React

• Strong background in computer science with knowledge of data structures and algorithms

• Passionate about learning new technologies and solving complex problems
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Q2. Sort the array in one loop
Ans. 
Use quicksort algorithm to sort array in one loop
• Use quicksort algorithm to partition array and sort elements

• Choose a pivot element and rearrange elements around pivot in one loop

• Repeat process for subarrays until entire array is sorted
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Q1. Immutable Class, Remove duplicates from string using java 8
Ans. 
Immutable class, remove duplicates from string using Java 8
• Create an immutable class to represent the string

• Use Java 8 streams to remove duplicates from the string

• Convert the string to a character array, use distinct() and collect() to remove duplicates
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Q2. Sealed classes in java
Ans. 
Sealed classes in Java restrict inheritance to a predefined set of subclasses.
• Sealed classes were introduced in Java 15 to restrict inheritance to a predefined set of subclasses.

• Subclasses of a sealed class must be declared in the same file as the sealed class.

• Sealed classes are declared using the 'sealed' modifier before the 'class' keyword.

• Example: sealed class Shape permits Circle, Square, Triangle;
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Q1. Fallout Mechanism between the microservices
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Fallout mechanism between microservices refers to how failures in one microservice can impact other microservices.
• Fallout can occur due to cascading failures when one microservice depends on another.

• Implementing circuit breakers can help prevent fallout by isolating failures.

• Monitoring and alerting systems are crucial for detecting and responding to fallout.

• Using asynchronous communication can reduce the impact of fall...read more
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Q1. Java tricky question related to collections
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Q1. HLD discussion related to current project
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Q1. Internals of hashset
Ans. 
HashSet is a collection that stores unique elements using a hash table.
• Uses hashing to store elements

• Does not allow duplicate elements

• Provides constant-time performance for basic operations like add, remove, contains
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Q2. Deques based questions
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Q1. Projects discussion from beginning
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Q2. How do you resolve conflicts?
Ans. 
I resolve conflicts by actively listening, understanding all perspectives, finding common ground, and proposing solutions.
• Actively listen to all parties involved

• Understand each perspective and the underlying reasons for conflict

• Find common ground and areas of agreement

• Propose solutions that address the concerns of all parties
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