Opcito Technologies Senior Java Developer Interview Questions and Answers

It is easy to solve the Aptitude question and some identifying outputs of program.

Q1. What is class?and write a logic for object in a class.
Ans. 
A class is a blueprint for creating objects in object-oriented programming.
• A class defines the properties and behaviors of objects.

• An object is an instance of a class.

• Example: Class 'Car' can have properties like 'color' and 'model', and behaviors like 'drive' and 'stop'.
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Q2. 1.swap two numbers without using temp variable 2.Reverse the string.
Ans. 
Swap two numbers without using temp variable and reverse a string without using built-in functions.
• To swap two numbers without using temp variable, use bitwise XOR operation.

• To reverse a string without using built-in functions, use two pointers approach.

• Example for swapping numbers: a = a ^ b; b = a ^ b; a = a ^ b;

• Example for reversing a string: use two pointers to swap characters from start and end of the string.
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Now, I am preparing for the third round.
So, I don't know the Coding Question.

Q1. Explain process for SDE
Ans. 
The process for Software Development Engineer involves planning, designing, coding, testing, and deploying software solutions.
• Gather requirements from stakeholders

• Create a design based on requirements

• Write code to implement the design

• Test the software for bugs and issues

• Deploy the software for users to use

• Iterate on feedback and make improvements
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Logical aptitude.
Spatial aptitude.
Organisational aptitude.
Physical aptitude.

Why they chose your company.
How your product solved the problem clients faced.
The measurable results of the service provided.

Q1. Self introduction for
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Q2. Introduction your self
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Q3. Why do you choose this company
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Q4. I'm like all food my
Ans. Favourite food is biriyani it's my All time favourite
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Q5. That all when I'm thinking
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Group discussion means one of the news project will be comes we're discussing about that project it's is group discussion

Q1. Coding Related Queries Past Project related queries Pasr experience related queries
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Coding related queries

Q1. Tell me about yourself
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Print Alphabet using any language like java c python

Q1. After test technical round
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Q2. Find a mid of array
Ans. 
To find the mid of an array, divide the sum of array length by 2 and round down to the nearest integer.
• Calculate the sum of array length and divide it by 2.

• Round down the result to the nearest integer.

• The resulting index is the mid of the array.
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Q1. Qs related to javascript
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Q1. Why should we hire you
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Q1. What is an object in java ?
Ans. 
An object in Java is an instance of a class that encapsulates data and behavior.
• Objects have state and behavior

• They are created from classes

• They can be used to represent real-world entities or concepts

• Objects can interact with each other through method calls
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Q2. What is method overloading?
Ans. 
Method overloading is when multiple methods have the same name but different parameters.
• Method overloading allows for more flexibility in method calls.

• The methods must have different parameters, such as different data types or different numbers of parameters.

• Example: public void print(int num) and public void print(String str)

• Overloading constructors is also common in Java.
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Q3. Creating multiple methods in a class with a same name and different arguments. The argument must be different type and length
Ans. 
Method overloading allows creating multiple methods with the same name but different arguments.
• Method signature must differ in number, type, or order of parameters

• Return type can be different but not the only difference

• Example: public void print(int num), public void print(String str), public void print(int[] arr)

• Overloading improves code readability and reusability
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Q4. What is inheritance in java?
Ans. 
Inheritance in Java allows a class to inherit properties and methods from another class.
• Inheritance is achieved using the 'extends' keyword.

• The class that is being inherited from is called the superclass or parent class.

• The class that inherits from the superclass is called the subclass or child class.

• Subclasses can access the public and protected members of the superclass.

• Inheritance promotes code reusability and allow...read more
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Q5. What is Type casting in java ?
Ans. 
Type casting in Java is the process of converting one data type into another.
• Type casting can be done implicitly or explicitly.

• Implicit type casting is done automatically by the compiler when there is no loss of data.

• Explicit type casting is done manually by the programmer when there is a possibility of data loss.

• Type casting is useful when we want to use a variable of one data type in an expression or assignment of an...read more
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Q1. Who is ur favourite cricket palyer ?
Ans. Ms dhoni because he is good captain and best finisher and world best wicket keeper
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