UKG Interview Questions, Process, and Tips

Q1. How frequently have you worked with large datasets?
Ans. 
I have extensive experience working with large datasets in various projects.
• Worked with large datasets in previous roles

• Utilized tools like SQL, Python, and R for data analysis

• Performed data cleaning, transformation, and visualization on large datasets

• Built predictive models using big data
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Q1. Reverse the linked list.
Ans. 
Reverse a linked list by changing the direction of pointers.
• Start with three pointers: current, previous, and next.

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

• Return the new head of the reversed linked list.
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Q1. Internel working of Hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• Retrieving a value involves hashing the ...read more
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Q1. Salary Discussion
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Hacker rank mcq medium to hard level 1 hr duration

Q1. Oops , diff composition and inheritance
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Q2. Design pattern explain singleton , abstract factory
Ans. 
Singleton ensures a class has only one instance, while Abstract Factory provides an interface for creating families of related objects.
• Singleton pattern restricts the instantiation of a class to one object, ensuring there is only one instance of the class.

• Abstract Factory pattern provides an interface to create families of related or dependent objects without specifying their concrete classes.

• Singleton pattern can be i...read more
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Q3. Implement linked list , all combination string in python
Ans. 
Implement linked list and generate all combination strings in Python.
• Create a Node class to represent each element in the linked list.

• Implement methods to add nodes, delete nodes, and generate all combinations of strings.

• Use recursion to generate all combinations of strings.
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Q1. Introduction about my skills and projects
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Q2. Situation based question on my projects , talk about security and performance in my projects
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Q1. Introduction about me and my family members
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Q2. Relocation comfortable , about my friends who are placed , why many people from my college
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Q1. Design a efficiënte db read
Ans. 
Efficient database read design
• Use indexing to quickly locate data

• Minimize the number of reads by fetching only necessary columns

• Consider denormalizing data for faster reads

• Implement caching mechanisms to reduce database load

• Optimize queries by avoiding unnecessary joins
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Q2. Exception handling
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Q3. Customruntime exception
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Q4. Design abstract factory
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Q5. Design a system to read the data efficiently without iterating on record repeatedly
Ans. 
Use indexing to access data directly without iterating
• Implement a database with proper indexing on key fields

• Utilize data structures like hash tables or binary search trees for quick access

• Consider using caching mechanisms to store frequently accessed data

• Optimize queries by using efficient algorithms like merge sort or quicksort
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Hacker rank exam, 2 DSA coding questions

Q1. Backend questions on spring boot
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Q2. Angular routing and service
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Q1. Cultural fit question
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Q2. And prior job experience and mental ability test
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Q1. The interviewer is from testing panel how the testing panel can take a developer interview they don’t have any knowledge about java worst interviewer in my life they waste my 1hour. after answer all the qu...read more
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Q2. What is encapsulation. Protected and default difference i have to explain her with example. Collection and hashmap i explain all the things in hashmap even the implementation After that she said to write ...read more
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Q3. She asked me about helm chart and aws.I did answer according to it. My interview was pretty well but very next day what i got to know from HR that my basic was not clear that’s very very unprofessional beh...read more
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3 questions were there

Q1. Basic questions
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Q2. Os, dbms, core concept of cs
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Q1. Core concept of cs
Ans. 
Core concept of computer science is the study of algorithms and data structures.
• Algorithms are step-by-step procedures for solving problems.

• Data structures are ways to organize and store data efficiently.

• Examples include sorting algorithms like bubble sort and data structures like arrays and linked lists.
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