FIS Senior Software Engineer and Lead Interview Questions and Answers

Leetcode medium level questions 2

Leetcode 2 medium level questions

Q1. Basic info about project
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Soo easy aptitude exam asked questions

Q1. What is oops in Java,fibo, and sorting
Ans. 
OOPs in Java refers to Object-Oriented Programming concepts, fibo likely refers to Fibonacci sequence, and sorting refers to arranging elements in a specific order.
• OOPs in Java includes concepts like classes, objects, inheritance, polymorphism, and encapsulation.

• Fibo likely refers to the Fibonacci sequence, where each number is the sum of the two preceding ones (e.g. 0, 1, 1, 2, 3, 5, ...).

• Sorting involves arranging el...read more
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Q2. Why is garbage collector is used in java etc more of java questions
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Q3. Can main can be overloaded and overrided
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Yes, main can be overloaded but not overridden in C++.
• Main can be overloaded by defining multiple functions with different parameters.

• Example: int main() and int main(int argc, char* argv[])

• Main cannot be overridden as it is a static function of the program.
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Q1. Merge two sorted linked lists
Ans. 
Merge two sorted linked lists into a single sorted linked list
• Create a new linked list to store the merged result

• Iterate through both input linked lists and compare nodes to determine the order in which they should be added to the result list

• Handle cases where one list is longer than the other
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Q2. Check if paranthesis are balanced or not
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To check if parentheses are balanced, use a stack data structure to keep track of opening and closing parentheses.
• Use a stack to push opening parentheses and pop when encountering a closing parenthesis

• If stack is empty when encountering a closing parenthesis, return false

• After iterating through all parentheses, if stack is empty, return true
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Q1. Right view of a Binary Search tree
Ans. 
The right view of a Binary Search Tree shows the nodes that are visible when viewing the tree from the right side.
• The right view of a Binary Search Tree includes the rightmost node at each level.

• Nodes at each level that are not visible from the right side are not included in the right view.

• Example: For the Binary Search Tree with values 1, 2, 3, 4, 5, the right view would be 1, 3, 5.
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Q2. Few javascript questions on how to parse a json object without using inbuilt libraries.
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The DSA round happens with pseudo code

Q1. Question asked from my resume
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Q2. How I implemented everything
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Q1. Why you want to join
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Q2. Where do you see yourself in five years
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Q1. Java Fundamentals
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Q2. System Design
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Q1. Previous experience
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Q2. Spring boot
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Q1. Offer discussion
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Q2. Onboarding process
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Q1. Explain the react lifecycle functions and how they work
Ans. 
React lifecycle functions are methods that are automatically called at specific points in a component's life cycle.
• Mounting: constructor, render, componentDidMount

• Updating: render, componentDidUpdate

• Unmounting: componentWillUnmount
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Q2. Css box model, difference between padding and margin
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Padding is the space inside the border of an element, while margin is the space outside the border.
• Padding is used to create space between the content and the border of an element.

• Margin is used to create space between the border of an element and other elements.

• Padding affects the size of the content area, while margin affects the positioning of the element.

• Example: padding: 10px will create 10 pixels of space inside ...read more
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Q1. What are your salary expectations in CTC and variables?
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Q2. Will you relocate to the location required?
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Data structures and algo. 2 ques were asked in hackerrank

Q1. Questions related to System design
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Q1. Basic question related to Spring and Java
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