10+ Modulemd Interview Questions and Answers

Count subarrays with sum divisible by K in an array.

• Iterate through the array and keep track of the running sum modulo K.

• Use a hashmap to store the frequency of remainders.

• For each prefix sum, check how many previous prefix sums have the same remainder.

• Return the total count of subarrays with sum divisible by K.

Find the Next Greater Element for each element in a list of integers.

• Iterate through the list of integers from right to left.

• Use a stack to keep track of elements whose NGE is yet to be found.

• Pop elements from the stack until a greater element is found or the stack is empty.

• Assign the NGE as the top element of the stack or -1 if the stack is empty.

Bond, paydown, factor, credit rating, swap, income, corporate action and its type are all financial terms.

• Bond is a debt security that pays interest to the investor.

• Paydown is the reduction of the outstanding principal amount of a loan.

• Factor is the percentage of the original principal amount of a loan that remains outstanding.

• Credit rating is an assessment of the creditworthiness of a borrower.

• Swap is a financial contract in which two parties agree to exchange cash flows.

• Inc...read more

Sort an array in a wave-like pattern where each element is greater than or equal to its adjacent elements.

• Iterate through the array and swap elements at even indices with their adjacent odd indices to form a wave pattern.

• There can be multiple valid wave arrays, so any valid wave array is acceptable.

• Ensure the first element is greater than or equal to the second element to start the wave pattern.

Convert a given integer number into its corresponding word representation.

• Implement a function that takes an integer as input and returns the word representation of that number.

• Break down the number into its individual digits and convert each digit into its word form.

• Handle special cases like numbers between 10 and 19, and multiples of 10.

• Combine the word forms of individual digits to form the final word representation of the number.

Explanation of financial terms related to bonds, corporate actions, coupons, paydowns, derivatives, and pricing.

• Bond: a debt security issued by a company or government

• Type: the specific characteristics of a bond, such as maturity date or interest rate

• Rating: a measure of the creditworthiness of a bond issuer

• Corporate action: an event that affects a company's securities, such as a merger or dividend

• Coupon: the interest rate paid on a bond

• Paydown: the repayment of a portion of ...read more

Paydown, factor, income, dividend, corporate action, fixed income are terms related to finance and investments.

• Paydown refers to the reduction of debt by making payments on a loan or bond.

• Factor is the amount by which a company's earnings are expected to grow in the future.

• Income is the money earned from investments or employment.

• Dividend is a portion of a company's profits paid out to shareholders.

• Corporate action refers to any event initiated by a company that affects its s...read more

Use a custom Comparator to sort names with Roman numerals as last names in Java.

• Create a custom Comparator that splits the names into parts and compares the Roman numerals separately.

• Use regular expressions to identify and extract the Roman numerals from the last names.

• Implement the Comparator interface and override the compare method to sort the names based on the Roman numerals.

• Example: Input array - ['John Smith III', 'Alice Brown II', 'David Lee IV']

A bond is a debt security that pays interest to the bondholder. It can be of different types and ratings.

• Bonds are issued by corporations, municipalities, and governments to raise capital.

• Types of bonds include corporate bonds, municipal bonds, and government bonds.

• Bond ratings are given by credit rating agencies like Moody's and S&P to indicate the creditworthiness of the issuer.

• Bond ratings range from AAA (highest) to D (default).

Facebook stores comments in its database using a combination of relational and non-relational databases.

• Comments are typically stored in a relational database like MySQL for structured data storage.

• For scalability and performance, Facebook may also use a NoSQL database like Cassandra or HBase for storing comments in a denormalized format.

• Metadata related to comments such as likes, timestamps, and user information may be stored in separate tables or collections.

• Facebook likely...read more

A hashmap is a data structure that stores key-value pairs and uses a hash function to map keys to their corresponding values.

• Hashmap uses a hash function to determine the index of the key-value pair in the underlying array.

• Collisions can occur when multiple keys hash to the same index, which is resolved using techniques like chaining or open addressing.

• Hashmap typically has an underlying array where each element is a linked list of key-value pairs with the same hash value.

• Ret...read more

A hotel management system is a software application that helps manage various aspects of a hotel's operations, such as reservations, check-ins, check-outs, room assignments, billing, and more.

• Use a relational database to store information about rooms, guests, reservations, and transactions

• Implement user interfaces for staff to manage bookings, check availability, and process payments

• Incorporate features for guests to make reservations online, view room options, and provide fe...read more

JavaScript is a programming language used for web development, while jQuery is a library built with JavaScript to simplify HTML document traversal and manipulation.

• JavaScript is a programming language, while jQuery is a library written in JavaScript.

• JavaScript can be used for a wide range of tasks, while jQuery is mainly used for DOM manipulation and event handling.

• JavaScript is a core technology for web development, while jQuery is a tool that enhances JavaScript functionali...read more

Financial derivatives are contracts whose value is derived from the performance of an underlying asset, index, or rate.

• Types include options, futures, forwards, and swaps

• Options give the holder the right, but not the obligation, to buy or sell an asset at a specified price before a certain date

• Futures are agreements to buy or sell an asset at a future date for a price agreed upon today

• Forwards are similar to futures but are customized contracts traded over-the-counter

• Swaps in...read more

Corporate actions are events initiated by a public company that impact its shareholders and securities.

• Types of corporate actions include dividends, stock splits, mergers and acquisitions, rights issues, and bonus issues.

• Dividends are payments made to shareholders from a company's profits.

• Stock splits involve dividing existing shares into multiple shares to lower the price per share.

• Mergers and acquisitions are when two companies combine or one company buys another.

• Rights iss...read more

Multithreading allows multiple threads to run concurrently, while exception handling deals with errors in a program.

• Multithreading involves running multiple threads simultaneously to improve performance and responsiveness.

• Threads share the same memory space but have their own program counter and registers.

• Exception handling is a mechanism to handle errors or exceptional situations in a program.

• It helps prevent the program from crashing by providing a way to gracefully handle ...read more