Unthinkable Solutions Interview Questions, Process, and Tips

String , Array, Largest subarray with sum 0

Q1. Largest Area of Histogram
Ans. 
The largest area of a histogram can be found by calculating the maximum area of rectangles formed by the histogram bars.
• Calculate the area of rectangles formed by each bar and find the maximum area.

• Consider the width of the rectangle as the number of consecutive bars with height greater than or equal to the current bar.

• Example: For histogram [2,1,5,6,2,3], the largest area would be 10 (5*2).
Answered by AI
Add your answer

The round was done on google form, where students were given 1 hour to solve some aptitude questions.

There were 3 coding questions which required basic programming knowledge. Anyone who did all 3 skipped another coding round to direct interview.

Q1. Project Related questions were there. For example I had projects related to Machine Learning so I was asked about various activations functions, Algorithms, etc.
Add your answer
Q2. Reverse a linked list.
Ans. 
Reverse a linked list by changing the pointers direction.
• Start with three pointers: current, previous, and next.

• Iterate through the linked list, updating the pointers to reverse the direction.

• Update the head of the linked list to be the previous node once the end is reached.
Answered by AI
Add your answer
Q3. Write a sql query to join two tables and find some data from one table.
Ans. 
SQL query to join two tables and retrieve data from one table.
• Use JOIN keyword to combine tables based on a related column

• Specify the columns to retrieve using SELECT statement

• Add conditions using WHERE clause if needed
Answered by AI
Add your answer

It was a DSA round which consisted of three questions.
1)longest substring without repeating characters
2)largest subarray with sum 0
3)String based question

Q1. 1)Largest Area of Histogram
Ans. 
The largest area of a histogram is the maximum area that can be enclosed by a rectangle within the histogram bars.
• Calculate the largest area of a histogram by finding the maximum area of rectangles that can be formed within the histogram bars.

• This can be done by iterating through each bar and calculating the area of rectangles that can be formed with that bar as the height.

• Keep track of the maximum area found so far an...read more
Answered by AI
Add your answer
Q2. Minimum effort in an array
Ans. 
Find the string with minimum length in an array of strings.
• Iterate through the array and keep track of the minimum length string

• Return the string with the minimum length
Answered by AI
Add your answer

Java Programming and core java along with DSA

Q1. Define Constructors
Ans. 
Constructors are special methods in a class that are used to initialize objects.
• Constructors have the same name as the class they belong to.

• They are called automatically when an object of the class is created.

• Constructors can have parameters to initialize the object with specific values.

• Example: public class Car { public Car(String color) { this.color = color; }}
Answered by AI
Add your answer
Q2. Define Oops pillars
Ans. 
Oops pillars refer to the four main concepts of object-oriented programming: Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a function to behave differently based on the object it is acting upon.

• Abstraction: Hiding the ...read more
Answered by AI
Add your answer

Subarray sum equals to zero

Q1. Basic technical questions related to your project
Add your answer

Q1. Tell me about yourself
Ans. 
I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java, Python, and web development technologies

• Strong problem-solving skills

• Team player with excellent communication skills
Answered by AI
Add your answer