Droisys Interview Questions, Process, and Tips

Smooth process of the group discussion.

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Q1. What fundamental questions related to the technologies mentioned in your resume were asked?
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Q1. Basic hr discussion
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Basic questions on about string and array data structures

Q1. Ethics , company policy
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Q2. How they regulate
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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...read more
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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.
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For fresher it was a normal aptitude test of Maths and English

Q1. Second round was technical related to coding common concepts like polymorphism, inheritance, class and struct etc.
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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.
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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
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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
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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

Q1. Basic questions on python
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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
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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 ...read more
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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
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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.
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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....read more
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You have some numeric elements in an array. You have to reverse the elements without using reverse function