HCLTech Trainee Analyst Interview Questions and Answers

Round duration - 180 Minutes
Round difficulty - Medium

Coding question 2 easy,1 hard

Q1. 
Minimum Stops for Ninja's Journey Problem Statement
Ninja wishes to travel from his house to a destination X miles away. He knows there are Y gas stations along the way, each station i located at a distan...read more
Ans. Recursion
The simple idea that we use in this approach will be to check all the available paths. For this we create a recursive function let’s say MINIMUM_STOP_HELPER() that will return the desired path. The function will take fuel left, distance travelled, next gas station, and the array of all the stations as its parameters.
 
The base conditions for this recursive function will be:
 
• If you have enough fuel
• If y...read more
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Q2. 
Black Friday Discount Challenge
Imagine it's Black Friday and a supermarket is offering a discount to every 'Nth' customer. You are tasked with calculating bills for customers based on product prices and ...read more
Ans. Counting Number of Previous Customers
We can simply start by creating a hashmap that stores each product ID and corresponding price. For each customer, calculating the bill amount is simple, just multiply the quantity by the price of each product they purchased.
 
We also keep a count of previous customers and increase it as soon as generateBill is called. If this count is divisible by ‘N’, we simply apply the discou...read more
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Q3. 
Ninja and His Secret Information Encoding Problem
Ninja, a new member of the FBI, has acquired some 'SECRET_INFORMATION' that he needs to share with his team. To ensure security against hackers, Ninja dec...read more
Ans. Brute Force
For encoding the given ‘SECRET_INFORMATION’ we can use any algorithm. Here first, we append the number of words of ‘SECRET_INFORMATION’ and ‘!’ into our resultant decoding string ‘ENCODED_INFORMATION’. Then we append the length of each word and ‘!’. At last, we find the ‘ASCII’ value of each character and then add 3 into the ASCII value. Then we convert this ASCII value into a character and replace this with...read more
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Round duration - 30 Minutes
Round difficulty - Easy

Asked me how to reverse string,tell me about yourself,visualise data structures in real life,dbms questions easy one

Q1. 
Reverse the String Problem Statement
You are given a string STR which contains alphabets, numbers, and special characters. Your task is to reverse the string.
Example:
Input:
STR = "abcde"
Output:
"e...read more
Ans. Optimal Solution
• Traverse the string and swap the first character with the last character, the second character with the second last character and so on.
• Basically, you need to swap the i-th character with the (N-i-1)-th character where N is the length of the string and 0-based indexing is considered.
Space Complexity: O(1)Explanation:
O(1).
 
In the worst case, only constant extra space is required.
Time Complexity: O(...read more
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Q1. Explain your projects
Ans. 
I have worked on various projects including developing a mobile app for a local charity and implementing a new inventory management system for a small business.
• Developed a mobile app for a local charity to help them raise funds and increase awareness

• Implemented a new inventory management system for a small business to streamline operations and improve efficiency
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Q2. Pillars of OOPS
Ans. 
The pillars of Object-Oriented Programming (OOP) are encapsulation, inheritance, and polymorphism.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object).

• Inheritance: Allowing a new class to inherit properties and behavior from an existing class.

• Polymorphism: The ability for objects of different classes to respond to the same message in different ways.
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Q3. What is Big Data?
Ans. 
Big Data refers to large volumes of data that cannot be easily managed or analyzed using traditional data processing tools.
• Big Data involves processing and analyzing massive amounts of data to uncover patterns, trends, and insights.

• It typically includes structured, semi-structured, and unstructured data from various sources.

• Examples of Big Data include social media data, sensor data, financial transactions, and healthc
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Q4. How do you manage data?
Ans. 
I manage data by organizing, analyzing, and storing it efficiently.
• I use database management systems to store and retrieve data.

• I ensure data accuracy and integrity through regular audits and validations.

• I analyze data using statistical tools and techniques to derive insights.

• I organize data into structured formats for easy access and interpretation.

• I prioritize data security and confidentiality to protect sensitive in
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Q5. What is cloud based services, why companies are shifting to cloud?
Ans. 
Cloud based services refer to services and resources delivered over the internet. Companies are shifting to cloud for scalability, cost savings, flexibility, and improved collaboration.
• Scalability: Companies can easily scale their resources up or down based on demand without investing in physical infrastructure.

• Cost savings: Cloud services eliminate the need for companies to purchase and maintain expensive hardware, le...read more
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Q6. Disadvantages of Cloud ?
Ans. 
Disadvantages of cloud computing include security risks, dependency on internet connection, and potential downtime.
• Security risks: Data stored in the cloud can be vulnerable to cyber attacks and breaches.

• Dependency on internet connection: Users need a stable internet connection to access cloud services, which can be a limitation in areas with poor connectivity.

• Potential downtime: Cloud service providers may experience ...read more
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Q1. Difference between class and interfaces
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Q2. Types of SQL queries and ques related to DBMS
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Q1. Normal behavioral question
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Q2. Questions regarding goals and hobbies
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Basic apti questions on pseudo code blood relation and profit loss.

3 coding questions 1 was easy and 2 were medium level.

Q1. Introduction Final year project overall basic cs fundamentals
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Q2. About the company
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Q1. Family background
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Q2. About the company
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Basic Quant and Reasoning questions

Simple D.P and problem solving questions

Q1. Self-introduction
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Q2. About your project and internships
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Q3. Questions on Team Collaborations and Leadership
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