DXC Technology

DXC Technology

American multinational B2B IT services provider.

4 Rounds ~21 Days Medium
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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

Backend Engineer • Coding • easy

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. Assume exactly one solution exists.

#Arrays #Hash Table
Practice
Backend Engineer • Coding • medium

Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element.

#Heap #Quickselect #Arrays
Practice
Backend Engineer • Coding • easy

Reverse a singly linked list. Provide both iterative and recursive solutions.

#Linked List #Recursion
Practice
Backend Engineer • Coding • medium

Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals that cover all the intervals in the input.

#Arrays #Sorting
Practice
Backend Engineer • Coding • medium

Given a string s, find the length of the longest substring without repeating characters.

#Strings #Sliding Window #Hash Set
Practice
Backend Engineer • Coding • medium

Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level).

#Trees #Breadth-First Search (BFS) #Queue
Practice
Backend Engineer • Coding • easy

Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -1.

#Strings #Hash Table
Practice
Backend Engineer • Coding • medium

Design and implement a data structure for Least Recently Used (LRU) cache. It should support get and put operations in O(1) time complexity.

#Design #Hash Table #Doubly Linked List
Practice
Data Engineer • Coding • medium

Write a Python generator function that reads a file and yields one line at a time. Why is this useful?

#Python #Generators #Memory Management
Practice
Data Engineer • Coding • easy

Given a list of dictionaries representing employee records, write a Python function to sort the list by the 'salary' key in descending order.

#Python #Sorting #Data Structures
Practice
Data Engineer • Coding • medium

Write a Python function to parse a large server log file and return the top 5 most frequent IP addresses.

#Python #File I/O #Hash Maps #Collections
Practice
Data Engineer • Technical • medium

How would you handle processing a 50GB file in Python on a machine with only 8GB of RAM?

#Python #Generators #Memory Management #Chunking
Practice
Data Scientist • Coding • hard

Implement the K-Means clustering algorithm from scratch in Python. You do not need to optimize it, but the logic must be sound.

#Python #Machine Learning Algorithms #Math
Practice
Data Scientist • Coding • medium

Write a Python function from scratch to calculate the TF-IDF scores for a given list of documents without using Scikit-Learn.

#Python #NLP #Math Implementation
Practice
Data Scientist • Coding • easy

Given an array of integers and a target sum, write a Python function to return the indices of the two numbers that add up to the target. (Two Sum)

#Python #Hash Maps #Time Complexity
Practice
Frontend Engineer • Coding • hard

Write a function to deep clone a nested JavaScript object, ensuring you handle circular references.

#JavaScript #Data Structures #Recursion
Practice
Frontend Engineer • Coding • easy

Write a function that flattens a deeply nested array without using `Array.prototype.flat`.

#JavaScript #Arrays #Recursion
Practice
Full Stack Engineer • Coding • easy

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

#Strings #Stacks
Practice
Full Stack Engineer • Coding • easy

Find the first non-repeating character in a string and return its index. If it does not exist, return -1.

#Strings #Hash Tables
Practice
Full Stack Engineer • Coding • medium

Write a function to flatten a deeply nested JSON object into a single-level dictionary with dot-separated keys.

#Recursion #Data Structures #JSON
Practice
Full Stack Engineer • Coding • medium

Given a string s, find the length of the longest substring without repeating characters.

#Strings #Sliding Window #Hash Tables
Practice
Full Stack Engineer • Coding • medium

Write a function to merge an array of overlapping intervals into a new array of non-overlapping intervals.

#Arrays #Sorting
Practice
Full Stack Engineer • Coding • easy

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

#Arrays #Hash Tables
Practice
Machine Learning Engineer • Coding • hard

Write a Python function to calculate the ROC-AUC score given an array of true labels and an array of predicted probabilities, without using scikit-learn.

#Python #Metrics #Machine Learning Algorithms
Practice
Machine Learning Engineer • Coding • easy

Write a Python function to merge two sorted arrays into a single sorted array without using built-in sorting functions.

#Python #Arrays #Two Pointers
Practice
Machine Learning Engineer • Coding • medium

Given a list of customer transaction amounts, write a Python script to find the top K most frequent transaction values.

#Python #Hash Maps #Heaps
Practice
Machine Learning Engineer • Coding • hard

Implement a basic K-Means clustering algorithm from scratch in Python using NumPy.

#Python #NumPy #Machine Learning Algorithms
Practice
Software Engineer • Coding • medium

Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals that cover all the intervals in the input.

#Arrays #Sorting
Practice
Software Engineer • Coding • easy

Write a function to find the first non-repeating character in a string and return its index. If it doesn't exist, return -1.

#Strings #Hash Tables
Practice
Software Engineer • Coding • easy

Write a program to detect if a cycle exists in a linked list.

#Linked Lists #Two Pointers
Practice
Software Engineer • Coding • medium

Given an array of strings, group the anagrams together. You can return the answer in any order.

#Hash Tables #Strings #Sorting
Practice
Software Engineer • Coding • easy

Implement a binary search algorithm to find a target value in a sorted array.

#Binary Search #Arrays
Practice
Software Engineer • Coding • medium

Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level).

#Trees #Breadth-First Search #Queues
Practice
Software Engineer • Coding • medium

Find the longest substring without repeating characters in a given string.

#Sliding Window #Hash Tables #Strings
Practice
Software Engineer • Coding • easy

Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

#Stacks #Strings
Practice

Difficulty Radar

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The "Standard" Interviewer

Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

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Think Out Loud

Always explain your thought process before writing code or drawing architecture.

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