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What will be the output of Python Program? 💻🔥 Options: A) CODER B) coder C) 4 D) 5 E) error Comment Output Below 🤔👇

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Top Programming Interview Questions and Answers (General) Question: Please explain what you understand by computer programming. Answer: Also known as coding or programming, computer programming is the process of encoding an algorithm into a notation, typically a computer program, by means of some programming language so that it can be executed by a computer. Each programming language contains a set of instructions for the computer to execute a set of tasks. Programming is a complex process that includes designing an algorithm, coding the same in a programming language, debugging a program, maintaining, and updating the code. Question: Can you enumerate and explain the various types of errors that can occur during the execution of a computer program? Answer: Three types of errors can occur during the execution of a computer program. These are: Logical errors – This occurs in the scenario of a computer program implementing the wrong logic. As there is no report generated for these types of programming errors, they are the most difficult ones to deal with. Runtime errors – Occurs when the program contains an illegal operation. For example, dividing a number by 0. These are the only errors that are displayed instantly during the program execution. Upon the occurrence of a runtime error, the program execution is stopped and a diagnostic message is displayed. Syntax errors – Occurs when one or more grammatical rules of the programming language being used is violated. Such errors are detected during compile time. Question: Please explain an algorithm. What are some of its important features? Answer: An algorithm can be defined as a set of finite steps that when followed helps in accomplishing a particular task. Important features of an algorithm are clarity, efficiency, and finiteness. Question: What do you understand by maintaining and updating a computer program? Answer: The maintenance and updating process of a computer program starts post its successful installation. While program maintenance is the continuous process of monitoring the computer program for bugs and errors, updating the computer program means making it better with minor and major changes over time. Question: Please provide a brief explanation on variables. Answer: Variables are used for storing the input of a program as well as the computational results during program execution. These are actually named memory locations. The value stored in a variable can change during the program execution.

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Let’s try to understand how garbage collection works in Java: Garbage collection is mainly the process of marking or identifying the unreachable objects and deleting them to free the memory. The implementation lives in the JVM, the only requirement is that it should meet the JVM specifications. These are the different types of garbage collectors in Java: - Serial Garbage Collector - Parallel/Throughput Garbage Collector - CMS Collector - G1 Collector Let’s take a look at a few advantages of garbage collection in Java: - It automatically deletes the unused objects that are unreachable to free up the memory - Garbage collection makes Java memory efficient - It need not be explicitly called since the implementation lives in the JVM - Garbage collection has become an important and standard component of many programming languages Let’s try to understand why Destructors are not used in Java.

What is the use of Destructor in Java? What is a Destructor? A destructor is a special method that gets called automatically as soon as the life-cycle of an object is finished. A destructor is called to de-allocate and free memory. The following tasks get executed when a destructor is called. - Releasing the release locks - Closing all the database connections or files - Releasing all the network resources - Other Housekeeping tasks - Recovering the heap space allocated during the lifetime of an object Destructors in Java also known as finalizers are non-deterministic. The allocation and release of memory are implicitly handled by the garbage collector in Java. Finalizers in Java have to be implicitly invoked since their invocation is not guaranteed, unlike C# finalizers which get invoked during the .NET run-time. Let’s take a look at key properties of a destructor: - Overloading or inheritance is not allowed - No specification of access modifiers or parameters - Automatic invocation and no explicit call from the user - Used in classes but not in structures - The order of the class varies from the most derived class to the least derived class - Also called when the object instance is no longer eligible for access - Used for releasing un-managed resources instead of managed resources held by the object Garbage Collector A garbage collector is a program that runs on the Java virtual machine to recover the memory by deleting the objects which are no longer in use or have finished their life-cycle. An object is said to be eligible for garbage collection if and only if the object is unreachable.

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📌Save Your time with Short Cuts Ctrl + A - Select All Ctrl + B - Bold Ctrl + C - Copy Ctrl + D - Fill Ctrl + F - Find Ctrl + G - Find next instance of text Ctrl + H - Replace Ctrl + I - Italic Ctrl + K - Insert a hyperlink Ctrl + N - New workbook Ctrl + O - Open Ctrl + P - Print Ctrl + R - Nothing right Ctrl + S - Save Ctrl + U - Underlined Ctrl + V - Paste Ctrl W - Close Ctrl + X - Cut Ctrl + Y - Repeat Ctrl + Z - Cancel F1 - Help F2 - Edition F3 - Paste the name F4 - Repeat the last action F5 - Goto F6 - Next Pane F7 - Spell Check F8 - Extension of the mode F9 - Recalculate all workbooks F10 - Activate Menubar F11 - New graph F12 - Save As Shift + F1 - What is it? Shift + F2 - Edit cell comment Shift + F3 - Paste the function into the formula Shift + F4 - Search Next Shift + F5 - Find Shift + F6 - Previous Panel Shift + F8 - Add to the selection Shift + F9 - Calculate the active worksheet Shift + F10 - Popup menu display Shift + F11 - New spreadsheet Shift + F12 - Save Ctrl + F3 - Set name Ctrl + F4 - Close Ctrl + F5 - XL, size of the restore window Ctrl + F6 - Next Workbook Window Shift + Ctrl + F6 - Previous Workbook Window Ctrl + F7 - Move window Ctrl + F8 - Resize Window Ctrl + F9 - Minimize the workbook Ctrl + F10 - Maximize or Restore Window Ctrl + F11 - Inset 4.0 Macro sheet Ctrl + F1 - Open File Alt + F1 - Insert a graph Alt + F2 - Save As Alt + F4 - Output Alt + F8 - Macro dialog Alt + F11 - Visual Basic Editor Ctrl + Shift + F3 - Create a name using the names of row and column labels Ctrl + Shift + F6 - Previous Window Ctrl + Shift + F12 - Printing Alt + Shift + F1 - New spreadsheet Alt + Shift + F2 - Save Alt + = - AutoSum Ctrl + `- Toggle value / display of the formula Ctrl + Shift + A - Insert the argument names in the formula Alt + down arrow - automatic view list Alt + '- Format Style Dialog Ctrl + Shift + ~ - General Format Enjoy❤️

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List of most asked Programming Interview Questions. Are you preparing for a coding interview? This post is for you. It contains a list of the most asked interview questions from each topic. Arrays - How is an array sorted using quicksort? - How do you reverse an array? - How do you remove duplicates from an array? - How do you find the 2nd largest number in an unsorted integer array? Linked Lists - How do you find the length of a linked list? - How do you reverse a linked list? - How do you find the third node from the end? - How are duplicate nodes removed in an unsorted linked list? Strings - How do you check if a string contains only digits? - How can a given string be reversed? - How do you find the first non-repeated character? - How do you find duplicate characters in strings? Binary Trees - How are all leaves of a binary tree printed? - How do you check if a tree is a binary search tree? - How is a binary search tree implemented? - Find the lowest common ancestor in a binary tree? Graph - How to detect a cycle in a directed graph? - How to detect a cycle in an undirected graph? - Find the total number of strongly connected components? - Find whether a path exists between two nodes of a graph? - Find the minimum number of swaps required to sort an array. Dynamic Programming 1. Find the longest common subsequence? 2. Find the longest common substring? 3. Coin change problem? 4. Box stacking problem? 5. Count the number of ways to cover a distance?

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Python Interview Questions for Freshers🧠👨‍💻 1. What is Python? Python is a high-level, interpreted, general-purpose programming language. Being a general-purpose language, it can be used to build almost any type of application with the right tools/libraries. Additionally, python supports objects, modules, threads, exception-handling, and automatic memory management which help in modeling real-world problems and building applications to solve these problems. 2. What are the benefits of using Python? Python is a general-purpose programming language that has a simple, easy-to-learn syntax that emphasizes readability and therefore reduces the cost of program maintenance. Moreover, the language is capable of scripting, is completely open-source, and supports third-party packages encouraging modularity and code reuse. Its high-level data structures, combined with dynamic typing and dynamic binding, attract a huge community of developers for Rapid Application Development and deployment. 3. What is a dynamically typed language? Before we understand a dynamically typed language, we should learn about what typing is. Typing refers to type-checking in programming languages. In a strongly-typed language, such as Python, "1" + 2 will result in a type error since these languages don't allow for "type-coercion" (implicit conversion of data types). On the other hand, a weakly-typed language, such as Javascript, will simply output "12" as result. Type-checking can be done at two stages - Static - Data Types are checked before execution. Dynamic - Data Types are checked during execution. Python is an interpreted language, executes each statement line by line and thus type-checking is done on the fly, during execution. Hence, Python is a Dynamically Typed Language. 4. What is an Interpreted language? An Interpreted language executes its statements line by line. Languages such as Python, Javascript, R, PHP, and Ruby are prime examples of Interpreted languages. Programs written in an interpreted language runs directly from the source code, with no intermediary compilation step. 5. What is PEP 8 and why is it important? PEP stands for Python Enhancement Proposal. A PEP is an official design document providing information to the Python community, or describing a new feature for Python or its processes. PEP 8 is especially important since it documents the style guidelines for Python Code. Apparently contributing to the Python open-source community requires you to follow these style guidelines sincerely and strictly. 6. What is Scope in Python? Every object in Python functions within a scope. A scope is a block of code where an object in Python remains relevant. Namespaces uniquely identify all the objects inside a program. However, these namespaces also have a scope defined for them where you could use their objects without any prefix. A few examples of scope created during code execution in Python are as follows: A local scope refers to the local objects available in the current function. A global scope refers to the objects available throughout the code execution since their inception. A module-level scope refers to the global objects of the current module accessible in the program. An outermost scope refers to all the built-in names callable in the program. The objects in this scope are searched last to find the name referenced. Note: Local scope objects can be synced with global scope objects using keywords such as global.

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