Vantiva Software Engineer Interview Questions and Answers

Difficult online round

Q1. Arrays from neetcode
Ans. 
Arrays are a collection of strings in programming used to store multiple values under a single variable name.
• Arrays are declared using square brackets []

• Each element in an array is accessed by its index, starting from 0

• Example: var fruits = ['apple', 'banana', 'orange']
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Q2. Linked list from neetcode
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Q1. Trees in neet code
Ans. 
Trees in neet code refer to the implementation of tree data structures in coding challenges on the platform NeetCode.
• Trees are a common data structure used in coding challenges to represent hierarchical relationships between data.

• Common tree operations include traversal (inorder, preorder, postorder), insertion, deletion, and searching.

• Examples of tree-related coding challenges on NeetCode include implementing a binary...read more
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Q2. Trees in leet code
Ans. 
Trees in leetcode are a common topic for coding interviews, involving various tree traversal and manipulation techniques.
• Understand different tree traversal methods like inorder, preorder, and postorder.

• Learn about common tree algorithms like finding the height, diameter, and lowest common ancestor.

• Practice solving tree-related problems on leetcode to improve your skills.
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Question from Strings and Question from Linked Lists

Q1. What are double pointers ?
Ans. 
Double pointers are pointers that store the memory address of another pointer.
• Double pointers are used in C and C++ to store the address of a pointer variable.

• They are commonly used in functions to modify the value of a pointer passed as an argument.

• Example: int **ptr; // declares a double pointer to an integer pointer.
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Q2. Discuss OOPS in Programming.
Ans. 
OOPS stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.
• OOPS focuses on creating objects that contain both data and methods to manipulate that data.

• Encapsulation, inheritance, and polymorphism are key principles of OOPS.

• Example: Inheritance allows a class to inherit properties and methods from another class, promoting code reusability.
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Q1. Reverse a linked list
Ans. 
Reverse a linked list by changing the next pointers of each node
• Initialize three pointers: prev = null, current = head, next = null

• Iterate through the linked list, updating next to current's next, current's next to prev, and moving prev and current pointers forward

• Return the new head, which is the last node visited
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Q2. Find a bit is set
Ans. 
To find if a bit is set, use bitwise AND operator with the bit position
• Use bitwise AND operator (&) with the bit position to check if it is set

• If the result is greater than 0, then the bit is set

• Example: Check if 3rd bit is set in binary number 1010 - (1010 & 0100) = 0100 (4), so 3rd bit is set
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Q3. Create a thread in process
Ans. 
Creating a thread in a process involves allocating resources for a new thread to run concurrently with other threads.
• Use threading libraries like pthreads in C or java.util.concurrent in Java

• Create a new thread object and pass a function or method to be executed by the thread

• Start the thread to begin execution

• Join the thread to wait for it to finish before continuing
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Basic java mcq, Java Hibernate Spring MVC framework questions

Q1. Os , CPP , bit manipulation
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Q1. Os , threads,cpp, python
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Q1. Transformer is a static device and transfer power one from to another form current
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Q2. Current transformer is a series conection and step up to high voltage
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Q3. There are three function of smart grid electrical protection isolation and control
Ans. 
The three functions of smart grid electrical protection isolation and control are fault detection, fault isolation, and service restoration.
• Fault detection involves identifying any issues in the electrical system.

• Fault isolation involves isolating the faulty component to prevent further damage.

• Service restoration involves restoring power to the affected area as quickly as possible.

• Examples of smart grid technologies th...read more
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Q4. Current is a flow in wire
Ans. 
Yes, current is the flow of electric charge in a wire.
• Current is measured in amperes (A).

• It is caused by the movement of electrons in a conductor.

• The direction of current flow is from positive to negative.

• Current can be either direct current (DC) or alternating current (AC).
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Q5. Faraday law is a electro magnetic field induction working
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Q6. Ohm's law is current between directly proportional voltage
Ans. 
Ohm's law states that current is directly proportional to voltage.
• Current increases as voltage increases

• Resistance remains constant

• Can be expressed as I = V/R
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SQP, PRS, SRT, TUV, is right answer VXW

Q1. Previous work exp
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Q2. Angular questions
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Standard test

Difficult problem to solve

Q1. What are your strengths and weaknesses?
Ans. 
My strengths include problem-solving, attention to detail, and teamwork. My weaknesses include time management and public speaking.
• Strengths: problem-solving, attention to detail, teamwork

• Weaknesses: time management, public speaking
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Q1. Manager discussion to understand career path
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