Dow Jones Interview Questions and Answers

Find an odd occurring number among even occurring numbers.

• Use XOR operation to cancel out even occurring numbers and get the odd occurring number.

• Iterate through the array and XOR each element with the result variable.

• The final result will be the odd occurring number.

Print the spiral order of a binary tree and matrix.

• For binary tree, use level order traversal and alternate direction for each level.

• For matrix, use four pointers to traverse in spiral order.

• Example for binary tree: 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7 -> 8 -> 9

• Example for matrix: 1 2 3 4 -> 8 7 6 5 -> 9 10 11 12 -> 16 15 14 13

Finding pairs in an array with a given sum.

• Iterate through the array and for each element, check if the difference between the given sum and the element exists in the array.

• Use a hash table to store the elements of the array and their indices for faster lookup.

• If there are multiple pairs with the same sum, return any one of them.

• If no pair is found, return null or an empty array.

Find total number of k element with given avg in an array in minimum time complexity.

• Use sliding window technique to traverse the array in O(n) time complexity.

• Maintain a sum variable to keep track of the sum of elements in the window.

• If the sum of elements in the window is equal to k times the given avg, increment the count.

• Move the window by subtracting the first element and adding the next element in the array.

Printing non-boundary elements of a binary tree

• Traverse the tree in any order (preorder, inorder, postorder)

• Check if the current node is not a boundary node (not the first or last node in its level)

• If it is not a boundary node, print its value

• Recursively traverse its left and right subtrees

A bond is a debt security that represents a loan made by an investor to a borrower.

• Bonds are issued by governments, municipalities, and corporations.

• They are used to raise capital and finance projects.

• Different types of bonds include government bonds, corporate bonds, municipal bonds, and convertible bonds.

• Government bonds are issued by national governments and are considered low-risk.

• Corporate bonds are issued by comp...read more

My specialisation subjects in BBA include marketing, finance, human resource management, and operations management.

• Marketing involves understanding consumer behavior and creating strategies to promote products or services.

• Finance focuses on managing funds, investments, and financial planning.

• Human resource management deals with recruiting, training, and managing employees.

• Operations management involves overseeing produ...read more

My favorite subject is history because I enjoy learning about past events and how they have shaped the world we live in today.

• I find studying different time periods and cultures fascinating

• I enjoy analyzing historical documents and artifacts

• I like understanding how historical events have influenced current societies and politics

Yes, I am comfortable with night shifts as I have prior experience working in night shifts.

• I have previous experience working night shifts in my previous job.

• I am able to adjust my sleep schedule to accommodate night shifts.

• I understand the importance of being alert and focused during night shifts.

• I am willing to work night shifts if required for the role.

My hobbies include hiking, painting, and playing the guitar.

• Hiking: I enjoy exploring nature trails and challenging myself physically.

• Painting: I find relaxation and creativity in expressing myself through art.

• Playing the guitar: I love learning new songs and improving my musical skills.

My parents work in education and my siblings work in finance and healthcare.

• Parents work in education

• Siblings work in finance and healthcare