20+ ITC Interview Questions and Answers

Find the duplicate number in an array of integers from 0 to N-2.

• Iterate through the array and keep track of the frequency of each number using a hashmap.

• Return the number with a frequency greater than 1 as the duplicate number.

• Alternatively, use Floyd's Tortoise and Hare algorithm to find the duplicate number in O(N) time and O(1) space.

Create a function to remove all occurrences of a given character from a string.

• Iterate through the string and build a new string excluding the specified character.

• Use string manipulation functions to achieve the desired result.

• Handle the case where the character does not exist in the string.

• Return the modified string as the output.

Develop a function to remove all instances of a given character from a string.

• Iterate through the string and only add characters that are not equal to the given character to a new string.

• Return the new string as the result.

• Handle edge cases like empty string or character not found in the string.

• Example: Input 'hello world' and 'o', output 'hell wrld'.

The task is to find the frequency of each character from 'a' to 'z' in a given string.

• Create an array of size 26 to store the frequency of each character from 'a' to 'z'.

• Iterate through the given string and increment the count of each character in the array.

• Print the array of frequencies as the output for each test case.

Given an array of integers, find a contiguous subarray with a given sum.

• Iterate through the array while keeping track of the current sum and start index.

• Use a hashmap to store the sum and its corresponding index.

• If the current sum - target sum exists in the hashmap, return the indices.

• Handle edge cases like when the target sum is 0 or when no subarray is found.

Count the total number of set bits in the binary representation of numbers from 1 to N modulo 1e9+7.

• Iterate through numbers from 1 to N and count the set bits in their binary representation

• Use bitwise operations to count the set bits efficiently

• Return the count modulo 1e9+7 for each test case

Implement a function to find the index of a given integer in a singly linked list.

• Traverse the linked list while keeping track of the index of each element.

• Compare each element with the target integer 'N'.

• Return the index if the element is found, otherwise return -1.

• Handle cases where the target integer is not found in the linked list.

SDLC/STLC are software development/testing lifecycles. Agile is a development methodology focused on iterative and incremental development.

• SDLC (Software Development Life Cycle) is a process used to design, develop, and test software. It includes phases like planning, analysis, design, implementation, and maintenance.

• STLC (Software Testing Life Cycle) is a process used to test software. It includes phases like test planning, test design, test execution, and test closure.

• Agile...read more

Find the smallest number whose digits multiply to a given number N.

• Iterate through possible digits to form the smallest number with product equal to N

• Use a priority queue to keep track of the smallest possible number

• Check constraints to ensure the number fits in a 32-bit signed integer

Implementing OOPs concepts in Python using code examples.

• Create classes and objects to represent real-world entities

• Use inheritance to create a hierarchy of classes

• Encapsulate data and behavior within classes

• Implement polymorphism by overriding methods

• Use abstraction to hide implementation details

A mobile device connects to a network through wireless communication protocols like Wi-Fi, Bluetooth, or cellular data.

• Mobile device scans for available networks

• User selects a network and enters password if required

• Device sends a connection request to the network

• Network authenticates the device and assigns an IP address

• Device is now connected to the network and can access the internet

I want to work at HPE because of their innovative technology solutions and commitment to research and development.

• HPE is a leader in the tech industry, known for cutting-edge solutions

• I am passionate about research and development and want to contribute to HPE's projects

• I admire HPE's focus on innovation and continuous improvement

• I believe working at HPE will provide me with valuable experience and opportunities for growth

Merge two sorted linked lists into a single sorted linked list.

• Create a new linked list to store the merged result.

• Compare the values of the nodes from both input lists and add the smaller value to the result list.

• Move the pointer of the list with the smaller value to the next node and continue the process until both input lists are empty.

ABC analysis is a technique used in inventory management to categorize items based on their importance.

• ABC analysis classifies items into categories A, B, and C based on their value and contribution to overall inventory costs.

• Category A items are high value items that make up a small percentage of total items but contribute a large percentage of total inventory costs.

• Category B items are moderate value items that make up a moderate percentage of total items and contribute a m...read more

Reverse a linked list in groups of k nodes

• Break the linked list into groups of k nodes

• Reverse each group individually

• Connect the reversed groups back together

Deferred revenue is revenue that has been received by a company, but has not yet been earned.

• Deferred revenue is a liability on the company's balance sheet.

• It represents revenue that has been paid by customers in advance for goods or services that have not yet been delivered.

• As the goods or services are provided, the deferred revenue is gradually recognized as revenue on the income statement.

• Examples include magazine subscriptions, software licenses, and annual maintenance co...read more

Common types of network topologies include bus, star, ring, mesh, and hybrid.

• Bus: all devices are connected to a central cable

• Star: all devices are connected to a central hub

• Ring: each device is connected to two other devices, forming a ring

• Mesh: each device is connected to every other device

• Hybrid: combination of two or more different topologies

Accounting is the process of recording, summarizing, analyzing, and reporting financial transactions of a business.

• Involves recording financial transactions

• Summarizing financial data in financial statements

• Analyzing financial information to make business decisions

• Reporting financial results to stakeholders

• Examples: preparing balance sheets, income statements, cash flow statements

Deferred revenue is revenue that has been received but not yet earned, so it is recorded as a liability until the goods or services are delivered.

• Deferred revenue is a liability on the balance sheet until the revenue is recognized.

• It is common in subscription-based businesses where customers pay upfront for services to be provided over time.

• Once the revenue is earned, it is recognized on the income statement.

• Examples include magazine subscriptions, software licenses, and prep...read more

SQL queries involving JOINS are used to combine rows from two or more tables based on a related column between them.

• Use INNER JOIN to return rows when there is at least one match in both tables

• Use LEFT JOIN to return all rows from the left table, and the matched rows from the right table

• Use RIGHT JOIN to return all rows from the right table, and the matched rows from the left table

• Use FULL JOIN to return rows when there is a match in one of the tables

Factorial of a number is the product of all positive integers less than or equal to that number.

• Factorial of 5 is 5! = 5 x 4 x 3 x 2 x 1 = 120

• Factorial of 0 is defined as 1, 0! = 1

• Factorial of negative numbers is not defined

Finding a subsequence of strings in an array

• Iterate through the array and check if each string is part of the subsequence

• Maintain a pointer for the subsequence and array to compare elements

• Return true if all strings in the subsequence are found in the array