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Solution 2_ Java Program to Count and Map Character Reversals in a String- Interview Question Asked in TCS, Wipro, Deloitte, Tech-Mahindra

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### Explanation of the Java Program This Java program counts the frequency of each character in a given string and stores the results in a `HashMap`. The key of the `HashMap` represents the character, and the value represents the number of times that character appears in the string. #### Detailed Breakdown of the Code: 1. **Initialization**: - The input string `str` is initialized with the value `"deepakkumar"`. - The string is converted to a character array `ch` using the method `toCharArray()`. This array will be used to iterate over each character in the string. 2. **Creating the HashMap**: - A `HashMap map` is instantiated to store each character (as the key) and its frequency (as the value). 3. **Iterating Over Characters**: - A `for` loop is used to iterate over each character `c` in the character array `ch`. - For each character `c`, the program checks if it is already present in the `HashMap` using `map.containsKey(c)`. 4. **U...

Solution 1_ Java Program to Count and Map Character Reversals in a String- Interview Question Asked in TCS, Wipro, Deloitte, Tech-Mahindra

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### Brief Explanation of the Java Code The provided Java program analyzes a given string to count the occurrences of each character when comparing it with the reversed sequence of the string. The result is stored in a `HashMap` that maps each character to its calculated count. #### Step-by-Step Breakdown of the Code: 1. **Initialization**: - The input string `str` is initialized with the value `"deepakkumar"`. - A `StringBuilder sb` is created to build intermediate results while checking character occurrences. - The string `str` is converted to a character array `ch` using `toCharArray()`, which allows the program to process each character individually. - A `HashMap map` is created to store each character and its calculated count. 2. **Main Loop to Process Characters**: - The outer `for` loop iterates over each character in the character array `ch` using index `j`. - **Nested Loop for Reverse Comparison**: - For each character `c...

Java Program to Expand Letters Based on Following Digits in a String- Interview Question asked in Deloitte, Infomerica

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The provided Java code snippet expands a compressed string based on the rules defined by the input format. Let's go through the logic step-by-step: Purpose of the Code: The code aims to decode a string where a letter is followed by a digit that specifies how many times the letter should be repeated. For example, given the input string `"d2r3w4t2"`, the output will be `"ddrrrwwwwtt"`. ### Key Components of the Code: 1. **Initialization:** - `str`: The input string to be decoded (`"d2r3w4t2"`). - `StringBuilder sb`: A dynamic string object to build the decoded output. - `char[] ch`: An array of characters from the input string to facilitate character-by-character processing. - `int i`: A loop counter initialized to zero, used to track the current character index. 2. **Main Loop (`for` loop):** - The loop iterates through each character in the `ch` array except the last one (`j - **If the current character `ch[j]` is a ...

Java Program to print the count of Consecutive character- Interview Question Asked in Mobikwik company

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The provided Java program counts consecutive occurrences of each character in a given string and prints the count for each sequence of consecutive characters. Let’s go through the code step-by-step to understand how it works. Program Title: "Java Program to Count Consecutive Characters in a String" Code Explanation Detailed Step-by-Step Explanation: 1. Initialization: - The program starts by defining a string `name` containing the input `"DDeee eepppaapekkrkka"`. - The string is converted to a character array `ch` using `name.toCharArray()` for easier manipulation. - `len` stores the length of the character array. - A `StringBuilder sb` is initialized to keep track of consecutive characters as they are identified. 2. Iterate Over Characters: - The main loop iterates over each character in the array `ch` using the index `j` from `0` to `len - 2` (the second last character). 3. Checking for Consecutive Characters: - The...

Java Program to Reverse Characters in a String While Preserving Space Positions Interview Question

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This question Asked by TechMahindra, LTIMindTree, Wipro Explanation of the Logic The given Java program reverses the characters of a string while keeping the spaces in their original positions. Here’s a step-by-step breakdown of how the program works: Step-by-Step Breakdown: Input String and Initialization: The program starts by initializing a string str with the value "i am pocket". It then converts this string into a character array c using str.toCharArray(). This allows individual manipulation of each character in the string. Another character array ch of the same length as str is created to store the result. Initially, this array is empty. Preserve Spaces in the Result Array: The first for loop iterates through the character array c. If a space character (' ') is found in c, it is directly copied to the same position in the ch array. This step ensures that all spaces from the original string str are preserved in their original positions in the ch a...

Ubank Company Online Test for QA Automation Engineer

As a QA Automation Engineer, finding the right opportunity to showcase your skills can be a challenge. Ubank Company, a leading financial institution, offers a comprehensive online test to assess your expertise in automation testing. In this article, we'll guide you through the Ubank Company online test for QA Automation Engineer, providing valuable insights and tips to help you succeed. Test Overview The Ubank Company online test is designed to evaluate your technical skills and knowledge in automation testing. The test consists of multiple-choice questions, coding challenges, and scenario-based questions, covering various aspects of automation testing, including: - Automation testing fundamentals - Programming languages (Java, Python, C#) - Selenium WebDriver - API testing - Test automation frameworks (TestNG, Cucumber, Appium) - Cloud-based testing (AWS Device Farm, Google Cloud Test Lab, Microsoft Visual Studio App Center) Test Format The online test is divided int...

TVS Motor Digital Online Test for Automation Test Engineer and video attached

Test Overview: This online test is designed to assess the technical skills and knowledge of Automation Test Engineers applying for a role at TVS Motor. The test will evaluate the candidate's ability to design, develop, and execute automated tests for software applications. Test Format: - Type: Online, Multiple Choice, and Coding Challenge - Duration: 90 minutes - Questions: 50 Multiple Choice Questions and 2 Coding Challenges Test Objectives: 1. Automation Testing Fundamentals: Evaluate the candidate's understanding of automation testing principles, methodologies, and frameworks. 2. Programming Skills: Assess the candidate's programming skills in languages like Java, Python, or C#. 3. Selenium WebDriver: Test the candidate's knowledge of Selenium WebDriver, including its features, advantages, and usage. 4. API Testing: Evaluate the candidate's understanding of API testing, including RESTful APIs, SOAP APIs, and API testing tools. 5. Test Autom...