Rigel Networks Software Developer Interview Questions and Answers for Freshers

Reasoning and aptitude questions are given

Q1. Tell all concepts of Overloading
Ans. 
Overloading is a concept in programming where multiple functions can have the same name but different parameters.
• Functions with the same name but different parameters can be defined in a class

• Overloading allows for flexibility in function usage

• Example: void print(int num) and void print(string text) are overloaded functions
Answered by AI
Add your answer
Q2. Tell me about a live example of inheritance
Ans. 
Inheritance in software development allows a class to inherit properties and behaviors from another class.
• Inheritance allows a subclass to reuse code from a superclass

• Subclass can also add new functionalities or override existing ones

• Example: Animal class can be a superclass with properties like name and age, while Dog class can inherit from Animal and add a method bark()
Answered by AI
Add your answer

Q1. Tell about the your self
Add your answer

Q1. What is HashMap?
Ans. 
HashMap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.
• HashMap allows quick access to values based on their keys

• Keys must be unique and values can be duplicated

• HashMap is not thread-safe and requires synchronization for concurrent access

• Java's HashMap implementation uses hashing to distribute keys across buckets
Answered by AI
Add your answer
Q2. It’s a collection framework.
Add your answer

It was online coding test having 3 questions:
- -----/
- -----
- -----

Q1. Resume, DSA, Cs fundamentals
Add your answer

Q1. DSA, coding Puzzles, Design Pattern
Add your answer

Q1. Company & values question
Add your answer

Most rounds were regarding English proficiency and 1 round regarding logical reasoning

Q1. What is your family background?
Add your answer
Q2. Why should we hire you?
Add your answer
Q3. What are your strengths and weaknesses?
Add your answer
Q4. Tell me about yourself.
Add your answer

Round duration - 135 minutes
Round difficulty - Medium

The test window was open from 2:00 p.m. to 05:30 PM IST on 28th of August 2020.We were also given a chance to take a practice test to know about working of the platform .It was a Proctored Assessment .The test platform was HackerEarth and there were around 28 MCQs, 1 programming question, and 2 SQL queries. MCQs majorly focused on OS, DBMS, C++, OOPS concepts.

Q1. Two Sum
You are given an array of integers 'ARR' of length 'N' and an integer Target. Your task is to return all pairs of elements such that they add up to Target.
Note:
We cannot use th...read more
Ans. Hashing Solution
• We can store the frequency of every element in the array in a hashmap.
• We will loop over every index i, and check the frequency of (Target - ARR[i]) is the hashmap:
  • If (Target - ARR[i]) is equal to ARR[i], we will check if frequency of ARR[i] . If it is greater than 1 then we will decrease the frequency of ARR[i] by 2 and add a pair (ARR[i] , ARR[i]) to our answer.
  • Else, if the frequency of ARR[i] and Targ...read more
Answered by CodingNinjas
Add your answer
Q2. SQL Questions
Write a query to find names of the customers who have purchased less than or equal to one product. Order the output by customer name. Given customer table with customer id and customer name , ...read more
Add your answer

Round duration - 50 minutes
Round difficulty - Medium

It was basically a technical interview. It was conducted around 11:00 a.m. on 31st august 2020. There was only 1 person who was interviewing me though I expected a panel. It started off by the question regarding our college and infrastructure of it and what do I like the most about it etc. Later continued by few technical subjective questions and a code along with a basic query. Technical questions regarding data structures like linked list, Array List , HashMap were asked along with concepts like backtracking were also covered. More about technologies related to projects that I have done were asked which is machine learning. the ratings i earned in online judges were also asked about.

Q1. SQL Question
Query to retrieve the employee name with second maximum salary from given table (there are 3 tables Employee(ID,name), Salary(Esalary,post) , Works For(ID,Salary)).
Add your answer
Q2. Sudoku
You are given a 9x9 sudoku. Your task is to solve sudoku and return the solution.
A sudoku is a puzzle in which players insert the numbers one to nine into a grid consisting of nine squares subdiv...read more
Ans. BACKTRACKING
Our approach here will be to check for each empty slot that filling it with which number will not violate any constraint. We will start from the first block and keep on checking for each block using recursion. Consider a function SOLVESUDOKU for this, that accepts as a parameter an ArrayList ARR and  do:
1. Check, if ARR[i][j] = 0 for each 1<=i<=9 and 1<=j<=9:
   1. Iterate for each 1<= VAL <=9 ...read more
Answered by CodingNinjas
Add your answer
Q3. Cycle Detection in a Singly Linked List
You have given a Singly Linked List of integers, determine if it forms a cycle or not.
A cycle occurs when a node's next points back to a previous node in the ...read more
Ans. Outer And Inner Loop
We are going to have two loops outer-loop and inner-loop 
1. Maintain a count of the number of nodes visited in outer-loop.
2. For every node of the outer-loop, start the inner loop from head.
3. If the inner-loop visits the node next to the outer-loop node, then return true, else repeat the process for the next iteration of outer-loop.
4. If outer-loop reaches the end of list or null, then return false.
Space ...read more
Answered by CodingNinjas
View 2 more answers

Round duration - 40 minutes
Round difficulty - Medium

It is more of a Managerial round. This was not confined to any topic or a subject .It took place around 4:15 p.m. on 31st of August ,2020. 
 

Q1. Technical Questions
How did you feel when you got to know that you were qualified to next round?
Take me through your resume.
What is your project about?
Why did you wanted to do an ML project?
Why do u choose ...read more
Add your answer