SDET By VS_Automation

 Here are Java programs based on wrapper classes and their methods , showing only input and output : ✅ 1. Convert String to int Input: "123" Output: 133 String s = "123"; int num = Integer.parseInt(s); System.out.println(num + 10); ✅ 2. String to Integer object Input: "456" Output: 912 String s = "456"; Integer obj = Integer.valueOf(s); System.out.println(obj * 2); ✅ 3. Check if char is digit Input: '5' Output: It's a digit. char c = '5'; if(Character.isDigit(c)) { System.out.println("It's a digit."); } ✅ 4. Check if char is letter Input: 'a' Output: true char ch = 'a'; System.out.println(Character.isLetter(ch)); ✅ 5. Convert upper to lower Input: 'A' Output: 'a' char upper = 'A'; System.out.println(Character.toLowerCase(upper)); ✅ 6. Convert lower to upper Input: 'm' Output: 'M' char lower = 'm'; System....

L ist of 100 real-time Java string manipulation program titles , now with sample inputs  : 🔐 Authentication & Tokens Extract token value from API response string 🔸 Input: "token=abc123xyz; sessionId=xyz456;" Extract only digits from a token string 🔸 Input: "token=45gh6ab78;" Parse JWT and extract payload 🔸 Input: "eyJhbGci...eyJ1c2VyIjoiam9obiJ9..." Extract session ID from cookie string 🔸 Input: "JSESSIONID=58DFA0A2B54D5E85F39D;" Validate Bearer token format 🔸 Input: "Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." Remove prefix from access token 🔸 Input: "access_token=abc123xyz" Split authorization header into type and value 🔸 Input: "Basic YWxhZGRpbjpvcGVuc2VzYW1l" Check if token is expired using timestamp in string 🔸 Input: "exp=1718918400;" Parse OAuth callback URL and extract code 🔸 Input: "https://example.com/callback?code=12345abc" Extr...

String  manipulation and character-based logic: 🔢 String Parsing and Extraction Extract all digits from a given string. Extract all letters from a string. Extract only uppercase letters from a string. Extract only lowercase letters from a string. Extract special characters from a string. Extract digits and return as an integer array. Extract words separated by a comma. Extract domain from an email string. Extract username from an email string. Extract numbers from a string and calculate their sum. 🔁 String Modification Replace all digits with * . Replace all vowels with # . Remove all spaces from a string. Remove duplicate characters from a string. Replace all occurrences of a word. Replace each character with its ASCII value. Replace uppercase letters with lowercase and vice versa. Insert a dash between every two digits. Add commas after every 3 digits in a number string. Format a string like a phone number: (123)...

Here is a list of 10 interview-style Java programs for each of the 20 commonly used String methods . These can help you prepare effectively: ✅ 1. length() Check if a string is empty without using isEmpty() . Count the number of characters in a sentence. Validate if input length is less than 10 characters. Compare lengths of two strings. Trim string and compare original vs trimmed length. Count total characters excluding spaces. Calculate total length of all words in a sentence. Validate password length (e.g., min 8 chars). Get length of each word in a string. Find average length of words in sentence. ✅ 2. charAt() Find first and last character of a string. Count occurrences of a specific character. Print characters at even positions. Replace character at given index. Reverse string using charAt() . Count uppercase and lowercase letters. Check if all characters are digits. Print ASCII value of each character. Find vowels and their positions. Print alternate ...

Here's a complete list of commonly used String methods in Java , along with what they do and how to use them in programming : ✅ 1. length() Returns the number of characters in the string. String str = "Java"; System.out.println(str.length()); // 4 ✅ 2. charAt(int index) Returns the character at the given index (0-based). System.out.println(str.charAt(1)); // 'a' ✅ 3. substring(int startIndex) Returns substring from given index to end. System.out.println(str.substring(1)); // "ava" ✅ 4. substring(int start, int end) Returns substring from start to (end - 1). System.out.println(str.substring(1, 3)); // "av" ✅ 5. indexOf(char/String) Finds the index of first occurrence of character/substring. System.out.println(str.indexOf('a')); // 1 ✅ 6. lastIndexOf(char/String) Finds the index of last occurrence of character/substring. System.out.println(str.lastIndexOf('a')); // 3 ✅ 7. toLowerCase() / toUpp...

Here are 50 important topics for a QA (Manual Testing) interview, especially useful for 2–3 years of experience: --- 1. SDLC 2. STLC 3. Test Case 4. Test Scenario 5. Test Plan 6. Test Strategy 7. Types of Testing 8. Functional Testing 9. Non-Functional Testing 10. Smoke Testing 11. Sanity Testing 12. Regression Testing 13. Retesting 14. Exploratory Testing 15. Ad-hoc Testing 16. Boundary Value Analysis (BVA) 17. Equivalence Partitioning (EP) 18. Decision Table Testing 19. State Transition Testing 20. Compatibility Testing 21. Usability Testing 22. Performance Testing 23. Load Testing 24. Stress Testing 25. Alpha Testing 26. Beta Testing 27. UAT (User Acceptance Testing) 28. Defect Life Cycle 29. Severity vs Priority 30. Bug Reporting Tools (JIRA, Bugzilla) 31. Requirement Traceability Matrix (RTM) 32. Entry and Exit Criteria 33. Positive and Negative Testing 34. Manual Testing vs Automation Testing 35. Agile and Scrum Process 36. Daily Stand-up, Sprint Planning, Retrospective 37. Test ...

Manual Testing Notes --- 1. Basic Testing Concepts Software Testing is the process of verifying that a system works as expected and is free of bugs. SDLC (Software Development Life Cycle) defines the steps for software development, while STLC (Software Testing Life Cycle) defines the stages for testing. Error: Human mistake, Defect: Issue in the software, Failure: When defect causes system to fail. Verification ensures product is being built right; Validation ensures the right product is being built. --- 2. Types & Levels of Testing Functional Testing checks what the system does; Non-functional Testing checks how it performs (like performance, security). Smoke Testing is basic build verification; Sanity Testing checks minor fixes. Regression Testing ensures new code doesn’t break existing features; Retesting checks a specific fix. Levels: Unit → Integration → System → UAT (User Acceptance Testing). --- 3. Test Documentation Test Plan: A detailed document outlining scope, approach, ...