IDZ Digital Interview Questions, Process, and Tips

10 reasoning questions and 3 coding questions

Q1. Wap for factorial with recurrsion
Ans. 
Factorial calculation using recursion in a programming language
• Define a function that takes an integer as input

• Base case: if input is 0, return 1

• Recursive case: return input multiplied by factorial of input-1

• Example: factorial(5) = 5 * factorial(4) = 5 * 4 * factorial(3) = ... = 5 * 4 * 3 * 2 * 1 = 120
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Q2. Opps and basic core Java questions
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Basic aptitude only think out of box

Q1. Static and final difference
Ans. 
Static variables belong to the class itself, while final variables cannot be changed after initialization.
• Static variables are shared among all instances of a class

• Final variables cannot be reassigned once initialized

• Static variables are initialized only once at the start of the program

• Final variables must be initialized when declared
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Q2. Patterns problem
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Q1. Tell me about your self?
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Q2. Checking english fluency
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Aptitude with 2 easy coding questions.

Q1. Basic java oops , exception questions
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Q2. And few easy SQL questions were asked
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Q1. Basic HR questions like tell me about yourself and
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Q2. What's your strength and weaknesses ?
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Q1. * this is not a technical round * logical questions were asked like how many ways can we measure distance between two walls ?
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Q2. Area of a table?
Ans. 
The area of a table is the measurement of the surface space it occupies.
• To calculate the area of a table, you need to measure the length and width of the table and then multiply the two measurements together.

• For example, if a table is 3 feet long and 2 feet wide, the area would be 3 x 2 = 6 square feet.

• The area of a table is important for determining how much space it will take up in a room or how many items can be pla
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Q3. Count number of hair in your head
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Was assigned to create a chess game with all the possible moves.

Q1. Related to unity, like what is sprite? what is ray casting? what is mesh? What are UI elements? What are the advantages of using UI elements?
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Q2. What is abstraction?
Ans. 
Abstraction is the process of removing unnecessary details and focusing on essential characteristics.
• Abstraction allows developers to work at a higher level of understanding without needing to worry about specific implementation details.

• It helps in simplifying complex systems by breaking them down into smaller, more manageable parts.

• For example, in programming, object-oriented programming languages use abstraction to c...read more
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Q3. What is OOPS? Various concepts of OOPS
Ans. 
OOPS stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects, which can contain data and code.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

• Inheritance: Ability of a class to inherit properties and behavior from another class

• Polymorphism: Ability to present the same interface for different data types

• Abstraction: Hiding the compl...read more
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Q4. What is a class and object?
Ans. 
A class is a blueprint for creating objects in object-oriented programming. An object is an instance of a class.
• A class defines the properties and behaviors of objects.

• An object is a specific instance of a class.

• Objects can have their own unique data and methods, while classes provide a template for creating objects.

• Example: Class 'Car' may have properties like 'color' and 'model', while an object of class 'Car' could
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Basic aptitude questions along with 2 coding questions

Q1. Fibbonaci series program
Ans. 
Fibonacci series program generates a sequence where each number is the sum of the two preceding ones.
• Start with two initial numbers, usually 0 and 1.

• Add the two previous numbers to get the next number in the sequence.

• Repeat this process to generate the Fibonacci series.
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Q2. Questions based on OOPS concepts, inheritance and reccursion
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Q1. Basic questions about you and your hobbies
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Simple logic and maths based questions along with coding round

Q1. Questions on string literals
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Q2. Array vs arraylist
Ans. 
Arrays are fixed in size, while ArrayLists can dynamically resize. Arrays are faster for accessing elements, while ArrayLists offer more flexibility.
• Arrays have a fixed size, while ArrayLists can dynamically resize.

• Arrays are faster for accessing elements, while ArrayLists offer more flexibility in terms of adding, removing, and manipulating elements.

• Example: String[] namesArray = new String[5]; ArrayList namesList = n
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Q1. My strength and weaknesses
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Q2. Past work experiences if any
Ans. 
I have worked as a software developer for 3 years at XYZ company.
• Developed web applications using Java, Spring, and AngularJS

• Collaborated with team members to design and implement new features

• Participated in code reviews and testing processes

• Resolved technical issues and provided support to end users
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