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18 questions

• What are the four pillars of OOP? Explain with examples.Fresher · Q51Programming🔒
• What is the difference between method overloading and overriding?Fresher · Q52Programming🔒
• What is the difference between an interface and an abstract class?Fresher · Q53Programming🔒
• Why is String immutable in Java? What is the difference between == and equals()?Fresher · Q54Programming🔒
• What is the difference between an Array and an ArrayList? When do you use a HashMap?Fresher · Q55Programming🔒
• Explain exception handling in Java. Checked vs unchecked exceptions?Fresher · Q56Programming🔒
• Write a program to reverse a string and check if it is a palindrome.Fresher · Q57Programming🔒
• Write a program to count the occurrence of each character in a string.Fresher · Q58Programming🔒
• What do static, final and the finally block mean in Java?Fresher · Q59Programming🔒
• What is a constructor? What do this and super mean?Fresher · Q60Programming🔒
• What are Java 8 streams and lambdas? How do you use them in automation?Junior QA · Q56Programming🔒
• How do you find duplicate elements in an array or list?Junior QA · Q57Programming🔒
• Write a program to find the largest and second largest number in an array.Junior QA · Q58Programming🔒
• What is the difference between HashMap, LinkedHashMap, TreeMap and Hashtable?Junior QA · Q59Programming🔒
• Write a Python script to validate an API response.Junior QA · Q60Programming🔒
• How do you use pytest fixtures and parametrization?Mid-level QA · Q51Programming🔒
• How do you implement a thread-safe singleton and when should you avoid singletons in tests?Senior SDET · Q31Programming🔒
• Write a utility that retries an operation with exponential backoff.Senior SDET · Q32Programming🔒