Qubole Interview Questions and Answers

Code to delete duplicate nodes in a sorted linked list

• Traverse the linked list and compare adjacent nodes

• If nodes are equal, delete one of them

• Repeat until all duplicates are removed

Printing all root to leaf paths in a binary search tree

• Traverse the tree recursively and keep track of the current path

• When a leaf node is reached, add the current path to the list of paths

• Print all the paths in the list

• Use an array of strings to store the paths

Find two integers in an array whose sum is closest to zero.

• Sort the array in ascending order.

• Initialize two pointers at the beginning and end of the array.

• Move the pointers towards each other until the sum is closest to zero.

Count set bits in a 32-bit integer in linear time

• Use bit manipulation to count set bits

• Divide the integer into 16-bit chunks and count set bits in each chunk

• Use lookup tables to count set bits in each 8-bit chunk

• Use parallel processing to count set bits in multiple integers simultaneously

To determine the width of a binary tree using breadth-wise traversal, we need to count the number of nodes at each level.

• Perform a breadth-first traversal of the binary tree

• Count the number of nodes at each level

• Keep track of the maximum number of nodes seen at any level

• Return the maximum number of nodes seen

Files are preferred over databases for certain types of data and applications.

• Files are faster for small amounts of data.

• Files are easier to manage and backup.

• Files are more flexible for certain types of data, such as images or videos.

• Databases are better for complex data relationships and queries.

• Databases are more secure and scalable for large amounts of data.

• The choice between files and databases depends on the spec

I have contributed to my projects by developing and implementing new features, fixing bugs, and improving overall performance.

• Developed and implemented new features

• Fixed bugs and issues

• Improved overall performance

• Collaborated with team members to ensure project success

• Provided technical support and troubleshooting assistance

I encourage open communication and collaboration to identify and solve problems within the team.

• Encourage open communication and active listening

• Identify the root cause of the problem

• Brainstorm solutions as a team

• Assign tasks and follow up on progress

• Evaluate the effectiveness of the solution

• Provide constructive feedback

• Celebrate successes and learn from failures

I expect a company that values innovation, growth opportunities, and work-life balance.

• Opportunities for professional development and growth

• A culture that encourages innovation and creativity

• A healthy work-life balance

• Clear communication and transparency

• Competitive compensation and benefits

• Collaborative and supportive team environment

Yes, I am planning to pursue a Master's degree in Computer Science.

• I am interested in specializing in Artificial Intelligence.

• I have already researched and shortlisted a few universities.

• I plan to apply for the next academic year.

• I believe higher studies will help me gain a deeper understanding of the field and advance my career.

I am very flexible in my professional life and can adapt to changing situations easily.

• I am open to learning new technologies and skills

• I can work in different environments and with different teams

• I am willing to take on new challenges and responsibilities

• I can adjust my work schedule to meet project deadlines

• I am comfortable with remote work and flexible work arrangements

I am a software engineer with experience in developing web applications and a passion for problem-solving.

• Experienced in developing web applications using languages such as Java, Python, and JavaScript

• Proficient in using frameworks such as Spring, Django, and React

• Strong problem-solving skills and ability to work in a team environment

• Passionate about learning new technologies and keeping up with industry trends

The current exchange rate varies depending on the currency pair and market conditions.

• Exchange rates are constantly fluctuating based on supply and demand

• Factors such as political events, economic data, and central bank decisions can impact exchange rates

• For example, as of August 2021, the exchange rate for USD to EUR is approximately 0.85

The Indian rupee is expected to depreciate against the dollar in the long run.

• The Indian economy is heavily dependent on imports, which puts pressure on the rupee.

• The US economy is expected to grow faster than India's, which will strengthen the dollar.

• Political and economic instability in India can also weaken the rupee.

• However, global events such as trade wars and geopolitical tensions can also impact the exchange rat...read more

Negotiate with service providers for bulk discounts and limit data usage to essential business needs.

• Negotiate with service providers for bulk discounts

• Limit data usage to essential business needs

• Consider implementing a BYOD (Bring Your Own Device) policy

• Use mobile device management software to monitor and control usage

• Encourage employees to use Wi-Fi instead of cellular data when possible

A consultant should possess strong analytical skills, effective communication, adaptability, and industry expertise.

• Strong analytical skills to identify problems, analyze data, and provide effective solutions.

• Effective communication to clearly convey ideas, build relationships, and present recommendations.

• Adaptability to work in diverse environments, handle unexpected challenges, and adjust strategies accordingly.

• Indus...read more

Consultant role requires a broader skill set and the ability to provide holistic solutions.

• Consultants need to have a deep understanding of various business functions and how they interact.

• They are expected to provide comprehensive solutions that address multiple aspects of a problem.

• Finance, marketing, and HR are important components of a business, but a consultant needs to go beyond individual functions.

• For example, ...read more

My major drawback as a consultant in my previous organization was my lack of experience in a specific industry.

• Lack of industry-specific knowledge

• Difficulty in understanding the unique challenges faced by clients

• Limited network and connections in the industry

• Less credibility due to lack of experience

• Need for extensive research and learning before providing effective solutions

The company is a leading consulting firm specializing in providing strategic advice and solutions to businesses.

• The company has been in operation for over 10 years.

• They have a team of experienced consultants with expertise in various industries.

• They offer services such as market research, financial analysis, and business strategy development.

• Some of their notable clients include Fortune 500 companies and startups.

• They ...read more

Key factors for creating a client solution

• Understanding client's needs and goals

• Identifying potential challenges and limitations

• Developing a customized solution

• Ensuring scalability and flexibility

• Providing ongoing support and maintenance

• Collaborating with the client throughout the process

Consulting offers diverse challenges, continuous learning, and the opportunity to make a significant impact.

• Consulting provides exposure to various industries and business problems.

• It offers the chance to work with talented professionals and learn from their expertise.

• Consultants have the opportunity to solve complex problems and make a tangible difference.

• The work is dynamic and ever-changing, ensuring continuous lear...read more

Wipro is an Indian multinational corporation that provides information technology, consulting and business process services.

• Founded in 1945 by M.H. Hasham Premji

• Headquartered in Bangalore, India

• Employs over 190,000 people worldwide

• Provides services in various industries including healthcare, finance, retail, and more

• Has a strong focus on sustainability and social responsibility

• Acquired Appirio, a cloud services company