RapidOps Assistant Software Developer Interview Questions and Answers

Q1. 30min technical round
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Q2. Project manager round
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Q3. HR round for salary discussion
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Q1. Operate or control a particualar typing of data device that is attached to a computer
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Q2. Operate or contriol
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Q3. In computing a device driver is a computer program that operates or controls a particular type of device that is attached to a computer or automaton
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Q4. To perform some manual act upon a human body in a methodical manner, and usually with instruments, with a view to restore soundness or health, as in amputation, lithotomy, etc.
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Coding test are just basic Array and linkedList question

Q1. Explain 4 pillar of oops
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Q2. Internal working of Hashmap
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Q3. Crud operation implementation
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Q1. Why are you chaning the organisation?
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The first round was an aptitude test. There were 30 questions with 1 marks for each.

After being selected from the first round the second round was the Coding test there were 6 sets and 1 set had 3 questions. they told me to do it in an online compiler without an internet connection.

Q1. After being selected from the coding test. They took technical interviews and asked very basic questions like oops and all but they were doing cross-questioning.
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30min Pseudo Code,Ratio and Proportion

1 hour Array,HashMap

Q1. Write a program a string is Anagram or not
Ans. 
Program to check if a string is an Anagram or not
• Create a function that takes in two strings as input

• Sort the characters in both strings and compare if they are equal

• Return true if they are anagrams, false otherwise
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Q2. How to connect mongodb with database
Ans. 
To connect MongoDB with a database, you need to use the MongoDB URI and a MongoDB client library.
• Use the MongoDB URI to specify the connection details such as host, port, username, password, and database name

• Install a MongoDB client library like Mongoose for Node.js or pymongo for Python

• Use the client library to establish a connection to the MongoDB database and perform CRUD operations
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Q3. What is event listener
Ans. 
An event listener is a function that waits for a specific event to occur and then triggers a response.
• Event listeners are commonly used in web development to handle user interactions like clicks, keypresses, etc.

• They are attached to specific elements and listen for events to occur on those elements.

• Once the event occurs, the listener executes a callback function to respond to the event.

• Example: Adding a click event lis...read more
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Q4. What is polymorphism
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Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.
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Q1. How to reverse a string without using extra space
Ans. 
Use two pointers to swap characters in place
• Initialize two pointers, one at the beginning of the string and one at the end

• Swap characters at the two pointers and move them towards each other until they meet or cross

• Repeat the process until the entire string is reversed
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Q2. Find a number that not present in array in O(N) time complexity array contain only 0 to n numbers
Ans. 
Use bitwise XOR operation to find the missing number in O(N) time complexity.
• Iterate through the array and XOR all the elements with their indices and the array length.

• The missing number will be the result of XORing all the elements with their indices and the array length.
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Q3. Why should you join this company
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Q4. How many interview have you give previously and why you get rejected
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Practice atleast 20 questions for every topic.

Q1. Introduction Achievement background education
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Q2. Ask about technical skills and ask questions about projects
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3 Question based on strings, array & LinkedList

Q1. Sql queries & RDBMS Concepts Java core Collection Complexity Pattern program
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Q1. Linked list Map Arraylist Sql Jvm Acid properties
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Q1. Why you want to join Skills What is your best handled situation
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