Dell Interview Questions, Process, and Tips

Q1. Basic Account questions on Bad Debts
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Q2. Explain how you can be a good fit for this role
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Q1. No technical questions
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Q2. Few work based scenarios were given and I had to identify the customer who made the payment.
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Core Subjects(DBMS,DCN,OS) + Aptitude + Coding(MCQS)

Q1. OOPS CONCEPTS, CHARACTERISITICS OF OOPS, AND MANY MORE
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Q2. CHECK IF A STRING IS SUBSTRING OF ANOTHER STRING
Ans. 
Check if a string is a substring of another string
• Use the indexOf() method to check if the substring exists in the main string

• If indexOf() returns -1, the substring is not present

• If indexOf() returns a value greater than -1, the substring is present
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Q1. Give me the code in-order recursive and non-recursive
Ans. 
In-order traversal of a binary tree using both recursive and non-recursive methods.
• Recursive method: Traverse left subtree, visit root, traverse right subtree.

• Non-recursive method: Use a stack to simulate the recursive call stack.

• Example: Given binary tree: 1 / \ 2 3, In-order traversal: 2 1 3.
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Q2. How would you sort words in large file
Ans. 
Use external sorting with merge sort algorithm to efficiently sort words in large file
• Divide the large file into smaller chunks that can fit into memory

• Sort each chunk individually using a sorting algorithm like merge sort

• Merge the sorted chunks back together to get the final sorted result

• Example: Divide a file of words into chunks of 1000 words each, sort each chunk using merge sort, then merge the sorted chunks back
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Q3. Explain the T9 Dictionary
Ans. 
T9 Dictionary is a predictive text technology used on mobile phones to input text using numeric keypads.
• T9 stands for Text on 9 keys

• It uses a dictionary to predict and suggest words based on the numeric keypad input

• For example, pressing 2-2-8-3-3-7-7-3-3-3 would suggest 'coffee' as a word
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Q4. What is insertion sort code
Ans. 
Insertion sort is a simple sorting algorithm that builds the final sorted array one item at a time.
• Iterate through the array starting from the second element

• Compare each element with the elements before it and insert it in the correct position

• Repeat until all elements are sorted

• Example: [5, 2, 4, 6, 1, 3] -> [2, 4, 5, 6, 1, 3] -> [2, 4, 5, 6, 1, 3] -> [1, 2, 4, 5, 6, 3] -> [1, 2, 3, 4, 5, 6]
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Hackerrank DSA questions, 120 mins, Easy to Medium

Q1. Puzzle, DSA LRU Cache
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Q2. HashMap related
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Q1. Past Project In depth discussion
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Q2. Java and Oops related question
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Q1. Common Behavioral Questions
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Q2. Reason for Switch
Ans. 
I switched to pursue new challenges and opportunities for growth in my career.
• Desire for new challenges and opportunities

• Seeking career growth and advancement

• Interest in learning new technologies or industries
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Q3. CTC expectations
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