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Droisys Interview Questions and Answers
Droisys Interview Experiences
6 interviews found
Anonymous
Smooth process of the group discussion.
Provide a problem and request a solution.
(1 Question)
- Q1. What fundamental questions related to the technologies mentioned in your resume were asked?
(1 Question)
- Q1. Basic hr discussion
Trainee Interview Questions asked at other Companies
Selected
I applied via Company Website and was interviewed in Nov 2024. There were 2 interview rounds.
Basic questions on about string and array data structures
(2 Questions)
- Q1. Ethics , company policy
- Q2. How they regulate
IOS Developer Interview Questions asked at other Companies
I applied via LinkedIn and was interviewed in Oct 2022. There were 2 interview rounds.
(2 Questions)
- Q1. Difference between stored procedure and functions?
- Ans.
Stored procedures are used to perform an action, while functions return a value.
Stored procedures are precompiled and stored in the database, while functions are compiled at runtime.
Functions can be used in SQL statements, while stored procedures cannot be used in SQL statements.
Functions can be called from within stored procedures, but stored procedures cannot be called from within functions.
Functions can have input p...
- Q2. Difference between == & === ?
- Ans.
The == operator compares values, while the === operator compares values and types.
The == operator performs type coercion, while the === operator does not.
The == operator returns true if the values are equal after type coercion, while the === operator returns true only if the values and types are equal.
For example, 1 == '1' returns true, but 1 === '1' returns false.
Interview Preparation Tips
Skills evaluated in this interview
DOT NET Developer Interview Questions asked at other Companies
Selected
I applied via Campus Placement and was interviewed before Mar 2023. There were 3 interview rounds.
For fresher it was a normal aptitude test of Maths and English
(4 Questions)
- Q1. Second round was technical related to coding common concepts like polymorphism, inheritance, class and struct etc.
- Q2. What is Polymorphism
- Ans.
Polymorphism is the ability of a single function or method to operate on different types of data.
Polymorphism allows objects of different classes to be treated as objects of a common superclass.
It enables a single interface to represent multiple underlying data types.
Examples include method overloading and method overriding in object-oriented programming.
- Q3. What is encapsulation
- Ans.
Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.
Encapsulation helps in hiding the internal state of an object and restricting access to it.
It allows for better control over the data by preventing outside code from directly accessing it.
Encapsulation also helps in achieving data abstraction, where the internal details of an object are hidden and only the necessary in
- Q4. Interface in java
- Ans.
Interface in Java is a reference type in Java, similar to a class, that can contain only abstract methods, default methods, static methods, and constant variables.
Interfaces are used to achieve abstraction and multiple inheritance in Java.
All methods in an interface are public and abstract by default.
A class can implement multiple interfaces but can only extend one class.
Example: interface Shape { void draw(); }
Example
This was final round where the VP was taking GD and asking questions related to the domain you've applied, as I applied for mobile development he asked me differences key between iOS and Android, latest available versions on those OS and some general questions
Interview Preparation Tips
Skills evaluated in this interview
IOS Developer Interview Questions asked at other Companies
Droisys interview questions for popular designations
I applied via Approached by Company and was interviewed in Oct 2021. There were 3 interview rounds.
(6 Questions)
- Q1. Basic questions on python
- Q2. Difference between list and tuple
- Ans.
List is mutable while tuple is immutable. List uses square brackets while tuple uses parentheses.
Lists can be modified while tuples cannot
Lists use square brackets [] while tuples use parentheses ()
Lists are used for collections of homogeneous items while tuples are used for heterogeneous items
Lists are slower than tuples
Lists have more built-in methods than tuples
- Q3. What is decorator in python
- Ans.
Decorator is a design pattern in Python that allows adding behavior to an object dynamically.
Decorators are functions that take another function as input and extend its behavior without modifying it.
They are denoted by '@' symbol followed by the name of the decorator function.
They can be used to add functionality like logging, timing, caching, etc. to a function.
They can also be stacked to apply multiple decorators to ...
- Q4. List some key differences between python 2.x and python 3.x
- Ans.
Python 3.x is not backward compatible with Python 2.x due to several changes in syntax and features.
Print statement is replaced with print() function
Division operator (/) returns float instead of integer
Unicode support is improved
Some modules and functions are renamed or removed
New syntax for exception handling
Different way of handling byte strings
Different way of importing modules
Different way of defining classes
Diffe
- Q5. What are the basic fundamental types in python
- Ans.
Python has four basic fundamental types: integers, floats, booleans, and strings.
Integers are whole numbers, positive or negative, without decimals.
Floats are numbers with decimals.
Booleans are either True or False.
Strings are sequences of characters enclosed in quotes.
- Q6. What are moderators in python
- Ans.
Moderators are objects that control the flow of execution in Python generators.
Moderators are used to pause and resume the execution of a generator function.
They are created using the yield keyword.
The send() method is used to send a value to the generator and resume its execution.
The throw() method is used to raise an exception in the generator.
The close() method is used to terminate the generator.
Examples: itertools....
You have some numeric elements in an array. You have to reverse the elements without using reverse function
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Skills evaluated in this interview
Software Engineer Interview Questions asked at other Companies
Selected
I applied via Approached by Company and was interviewed before Oct 2022. There were 4 interview rounds.
(1 Question)
- Q1. Salary if suitable in budget they will schedule
(1 Question)
- Q1. Only communication skill Performance Securiry Only tools name because they do not even know the use Analytical question
(1 Question)
- Q1. Manageral questions Analytical question Communication
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Senior QA Engineer Interview Questions asked at other Companies
Jobs at Droisys
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Tejaswini Kadam
Selected
I applied via Company Website and was interviewed in Dec 2023. There were 3 interview rounds.
(1 Question)
- Q1. GCD, Operation queue, struct vs class, some small logical coding ,
(1 Question)
- Q1. GCD, operation queue, URL Session tasks, ref type , value tyep,
(1 Question)
- Q1. Basic and discussion about Job offer
(1 Question)
- Q1. Access Specifier
(2 Questions)
- Q1. Weak - Strong Difference
- Ans.
Weak - Strong Difference is a common interview question to assess understanding of object-oriented programming concepts.
Weak references do not prevent the referenced object from being deallocated, while strong references do.
Weak references are used to avoid retain cycles in iOS development.
Strong references increase the retain count of an object, keeping it in memory until all strong references are released.
- Q2. Open - Public Difference
- Ans.
In iOS development, 'open' allows access to the class or method from any module, while 'public' restricts access to the current module only.
Open access modifier allows classes and methods to be accessed from any module.
Public access modifier restricts access to the current module only.
Example: 'open class MyClass' can be accessed from any module, while 'public class MyClass' can only be accessed within the current modu
I appeared for an interview before Feb 2021.
(3 Questions)
Round duration - 150 Minutes
Round difficulty - Medium
It was an Aptitude test and Technical objective test of 60 minutes followed by a Coding test of 90 minutes.There was a 1 hour gap b/w the two tests.
- Q1.
Count Derangements
Determine the number of derangements possible for a set of 'N' elements. A derangement is a permutation where no element appears in its original position.
Input:
An integer 'T' repres... - Ans.
Count the number of derangements possible for a set of 'N' elements.
Derangement is a permutation where no element appears in its original position.
Use dynamic programming to calculate derangements efficiently.
Apply the formula: D(n) = (n-1) * (D(n-1) + D(n-2)), with base cases D(1) = 0 and D(2) = 1.
- Q2.
Prime Numbers Identification
Given a positive integer
N, your task is to identify all prime numbers less than or equal toN.Explanation:
A prime number is a natural number greater than 1 that has no po...
- Ans.
Identify all prime numbers less than or equal to a given positive integer N.
Iterate from 2 to N and check if each number is prime
Use the Sieve of Eratosthenes algorithm for better efficiency
Optimize by only checking up to the square root of N for divisors
- Q3.
Common Elements Problem Statement
Identify and output the common strings present in both given arrays of lowercase alphabets for each test case.
Input:
The first line contains an integer 'T' representin... - Ans.
The problem requires identifying and outputting common strings present in two arrays of lowercase alphabets for each test case.
Iterate through the elements of the second array and check if they are present in the first array.
Use a hash set or map to efficiently check for common elements.
Return the common strings in the order they appear in the second array.
(4 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
This round had 1 question from DSA particulary Trees and after that some questions from OOPS were asked.
- Q1.
Spiral Order Traversal of a Binary Tree
Given a binary tree with
Nnodes, your task is to output the Spiral Order traversal of the binary tree.Input:
The input consists of a single line containing elem... - Ans.
Implement a function to return the spiral order traversal of a binary tree.
Traverse the binary tree level by level, alternating the direction of traversal.
Use a queue to keep track of nodes at each level.
Append nodes to the result list based on the traversal direction.
Handle null nodes appropriately to maintain the spiral order.
Example: Input: 1 2 3 -1 -1 4 5, Output: 1 3 2 4 5
- Q2. What is the difference between an Abstract Class and an Interface in Java?
- Ans.
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
Abstract class can have constructor, fields, and methods, while interface can only have constants and abstract methods.
A class can extend only one abstract class, but can implement multiple interfaces.
Abstract classes are used to provide a common base for subclasses, while interfaces are used to define a contr...
- Q3. What is the static keyword in Java?
- Ans.
The static keyword in Java is used to create class-level variables and methods that can be accessed without creating an instance of the class.
Static variables are shared among all instances of a class.
Static methods can be called without creating an object of the class.
Static blocks are used to initialize static variables.
Example: public static int count = 0;
- Q4. What is the difference between a constructor and a method in Object-Oriented Programming?
- Ans.
Constructor is a special method used to initialize objects, while a method is a regular function that performs a specific task.
Constructors are called automatically when an object is created, while methods need to be called explicitly.
Constructors have the same name as the class, while methods have unique names.
Constructors do not have a return type, while methods have a return type.
Example: Constructor - public ClassN...
(2 Questions)
Round duration - 60 minutes
Round difficulty - Medium
This round had 2 questions from DSA and after that some basic HR questions were asked.
- Q1.
Ways To Make Coin Change
Given an infinite supply of coins of varying denominations, determine the total number of ways to make change for a specified value using these coins. If it's not possible to make...
- Ans.
The task is to find the total number of ways to make change for a specified value using given denominations.
Use dynamic programming to solve this problem efficiently.
Create a 1D array to store the number of ways to make change for each value from 0 to the target value.
Iterate through the denominations and update the array based on the current denomination.
The final answer will be the value at the target index of the ar
- Q2.
Palindrome String Validation
Determine if a given string 'S' is a palindrome, considering only alphanumeric characters and ignoring spaces and symbols.
Note:
The string 'S' should be evaluated in a case... - Ans.
Check if a given string is a palindrome after removing special characters, spaces, and converting to lowercase.
Remove special characters and spaces from the input string
Convert the string to lowercase
Check if the modified string is a palindrome by comparing characters from start and end
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
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