NielsenIQ Business Intelligence Analyst Interview Questions and Answers

Multithreading in Java refers to the concurrent execution of two or more parts of a program for maximum utilization of CPU.

• Multithreading allows multiple threads to run concurrently within a single program.

• It improves the performance of the program by utilizing the CPU more efficiently.

• Java provides built-in support for multithreading through the java.lang.Thread class.

• Multithreading can be used for tasks such as backg...read more

CPU scheduling policies include FCFS, SJF, Round Robin, Priority, and Multilevel Queue. The operating system does the scheduling.

• FCFS (First Come First Serve)

• SJF (Shortest Job First)

• Round Robin

• Priority

• Multilevel Queue

• Operating system does scheduling

Jvm is Java Virtual Machine. It manages threads on its own.

• Jvm is a virtual machine that executes Java bytecode.

• It provides a runtime environment for Java programs.

• Jvm manages threads on its own using its own thread scheduler.

• Jvm is platform-independent and provides a layer of abstraction between the Java code and the underlying operating system.

• Examples of popular JVM implementations include Oracle's HotSpot and OpenJ

Tree traversal is a technique to visit all nodes of a tree in a specific order.

• There are three types of tree traversals: inorder, preorder, and postorder.

• Inorder traversal visits the left subtree, then the root, and then the right subtree.

• Preorder traversal visits the root, then the left subtree, and then the right subtree.

• Postorder traversal visits the left subtree, then the right subtree, and then the root.

• For exampl...read more

ArrayList and Vector are both dynamic arrays, but Vector is synchronized and slower. Traversing a Vector is similar to an ArrayList.

• ArrayList is not synchronized, while Vector is synchronized.

• ArrayList is faster than Vector, but Vector is thread-safe.

• To traverse a Vector, we can use a for loop or an iterator, similar to an ArrayList.

• Example: Vector v = new Vector<>(); for(String s : v) { //do something }

TCS is a leading global IT services company with a strong reputation and diverse opportunities for growth.

• TCS has a strong reputation in the IT industry

• TCS offers diverse opportunities for growth and learning

• TCS has a global presence and works with top clients

• TCS has a strong focus on innovation and technology

• TCS provides a supportive and inclusive work environment

Tata Salt is the product used in every house.

• Tata Salt is a brand of salt produced by Tata Chemicals.

• It is the market leader in India with a 27% market share.

• Tata Salt has been fortified with iodine to help address iodine deficiency in India.

• It is available in various sizes and packaging options to suit different needs.

• Tata Salt has won several awards for its quality and innovation.

My hobby and passion is photography.

• I love capturing moments and telling stories through my photographs.

• I enjoy exploring different techniques and experimenting with composition.

• Photography allows me to express my creativity and view the world from unique perspectives.

• I have participated in several photography competitions and my work has been featured in local exhibitions.

• Some of my favorite subjects to photograph are

A good leader possesses qualities such as strong communication skills, empathy, integrity, and the ability to inspire and motivate others.

• Strong communication skills: A good leader is able to effectively convey their ideas and instructions to their team members.

• Empathy: A good leader understands and considers the feelings and perspectives of their team members, fostering a positive and supportive work environment.

• Integ...read more

Being stranded in a foreign country with no money or means to communicate

• Lost my wallet with all my money and identification

• Couldn't speak the local language to ask for help

• Had to rely on the kindness of strangers for assistance

I worked on a project analyzing customer data to identify trends and improve marketing strategies.

• Used data analysis techniques to identify patterns and correlations in customer behavior

• Developed predictive models to forecast customer preferences and optimize marketing campaigns

• Collaborated with cross-functional teams to implement data-driven strategies and measure their impact

• Conducted A/B testing to evaluate the effe

Using stochastic to analyze Indian cricket team's current scenario and eliminate worst while preserving best.

• Stochastic analysis can help identify the strengths and weaknesses of individual players and the team as a whole

• It can also help in predicting the outcome of future matches based on past performance

• Eliminating the worst performers and preserving the best can help improve the team's overall performance

• For example...read more