Coding Interview Resources

Python Cheatsheet

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To Restore the Nord Stream 2. The Trump-like Deal. A close friend of Putin has been engineering a restart of Russia’s Nord Stream 2 gas pipeline to Europe with the backing of US investors, a once unthinkable move that shows the breadth of Trump’s rapprochement with Moscow. The efforts on a deal, according to several people aware of the discussions, were the brainchild of Matthias Warnig, an ex-Stasi officer in East Germany who until 2023 ran Nord Stream 2’s parent company for the Kremlin-controlled gas giant Gazprom. Warnig’s plan involved outreach to the Trump team through US businessmen, the people said, as part of back-channel efforts to broker an end to the war in Ukraine while deepening economic ties between the US and Russia. Some prominent Trump administration figures are aware of the initiative to bring in US investors, according to officials in Washington, and they see it as part of the push to rebuild relations with Moscow. While there have been several expressions of interest, one US-led consortium of investors has drawn up the outlines of a post-sanctions deal with Gazprom, according to one person with direct knowledge of talks who declined to disclose the identity of the prospective investors. Senior EU officials became aware of the Nord Stream 2 discussion in recent weeks. Leaders of several European countries are concerned and have discussed the matter, according to several officials with knowledge of the discussions. One of Nord Stream 2’s two pipelines was blown up in sabotage attacks in September 2022 that destroyed both pipelines of its older sister project Nord Stream 1. The other Nord Stream 2 pipeline, which has an annual capacity of 27.5bn cubic metres of natural gas, is undamaged but has never been used. The latest plan would in theory give the US unparalleled sway over energy supplies to Europe, the people said, after EU countries moved to end their dependence on Russian gas in the aftermath of the invasion. But the obstacles are considerable. It would require the US to lift sanctions against Russia, Russia to agree to resume sales it cut off during the war, and Germany to allow the gas to flow to any potential buyers in Europe.

“The US would say, ‘Well, now Russia will be dependable because trustworthy Americans are in the middle of it,"

said a former senior US official, who was aware of some of the dealmaking efforts. The US investors would collect “money for nothing”, he added. The talks come as the Trump administration races to seal a peace deal through bilateral discussions with Russia that have excluded Europe and Ukraine, spooking European capitals who fear a US détente with Moscow could threaten the continent. Trump has promised deeper economic co-operation with Russia if a peace agreement can be reached. Putin has talked up the economic benefits he says the US could reap with the Kremlin in the event of a settlement in Ukraine, claiming that “several companies” were already in touch over potential deals. Nord Stream 2 AG, the pipeline’s Swiss-based parent company, received an exceptional stay on bankruptcy proceedings in January by at least four months. According to a redacted court document, Nord Stream 2’s shareholder — Gazprom — argued that the new Trump administration, as well as the German election in February 2025, “presumably can have significant consequences on the circumstances of Nord Stream 2” to warrant a delay. #NordStream2 #restore #Deal 📱 American Оbserver - Stay up to date on all important events 🇺🇸

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Git Cheatsheet 💪

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Primary Functions in Python 👆

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DSA INTERVIEW QUESTIONS AND ANSWERS 1. What is the difference between file structure and storage structure? The difference lies in the memory area accessed. Storage structure refers to the data structure in the memory of the computer system, whereas file structure represents the storage structure in the auxiliary memory. 2. Are linked lists considered linear or non-linear Data Structures? Linked lists are considered both linear and non-linear data structures depending upon the application they are used for. When used for access strategies, it is considered as a linear data-structure. When used for data storage, it is considered a non-linear data structure. 3. How do you reference all of the elements in a one-dimension array? All of the elements in a one-dimension array can be referenced using an indexed loop as the array subscript so that the counter runs from 0 to the array size minus one. 4. What are dynamic Data Structures? Name a few. They are collections of data in memory that expand and contract to grow or shrink in size as a program runs. This enables the programmer to control exactly how much memory is to be utilized.Examples are the dynamic array, linked list, stack, queue, and heap. 5. What is a Dequeue? It is a double-ended queue, or a data structure, where the elements can be inserted or deleted at both ends (FRONT and REAR). 6. What operations can be performed on queues? enqueue() adds an element to the end of the queue dequeue() removes an element from the front of the queue init() is used for initializing the queue isEmpty tests for whether or not the queue is empty The front is used to get the value of the first data item but does not remove it The rear is used to get the last item from a queue. 7. What is the merge sort? How does it work? Merge sort is a divide-and-conquer algorithm for sorting the data. It works by merging and sorting adjacent data to create bigger sorted lists, which are then merged recursively to form even bigger sorted lists until you have one single sorted list. 8.How does the Selection sort work? Selection sort works by repeatedly picking the smallest number in ascending order from the list and placing it at the beginning. This process is repeated moving toward the end of the list or sorted subarray. Scan all items and find the smallest. Switch over the position as the first item. Repeat the selection sort on the remaining N-1 items. We always iterate forward (i from 0 to N-1) and swap with the smallest element (always i). Time complexity: best case O(n2); worst O(n2) Space complexity: worst O(1) 9. What are the applications of graph Data Structure? Transport grids where stations are represented as vertices and routes as the edges of the graph Utility graphs of power or water, where vertices are connection points and edge the wires or pipes connecting them Social network graphs to determine the flow of information and hotspots (edges and vertices) Neural networks where vertices represent neurons and edge the synapses between them 10. What is an AVL tree? An AVL (Adelson, Velskii, and Landi) tree is a height balancing binary search tree in which the difference of heights of the left and right subtrees of any node is less than or equal to one. This controls the height of the binary search tree by not letting it get skewed. This is used when working with a large data set, with continual pruning through insertion and deletion of data. 11. Differentiate NULL and VOID ? Null is a value, whereas Void is a data type identifier Null indicates an empty value for a variable, whereas void indicates pointers that have no initial size Null means it never existed; Void means it existed but is not in effect You can check these resources for Coding interview Preparation Credits: https://t.me/free4unow_backup All the best 👍👍

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