Deutsche Telekom Sdet Automation Test Engineer Interview Questions and Answers

Q1. Manual Testing Concepts
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Q2. What are Oops Concepts
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Oops Concepts are fundamental principles of object-oriented programming such as Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a function to behave differently based on the object it is acting upon.

• Abstraction: Hiding t...read more
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Q1. Java related questions
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Q1. Group anagram strings in a array
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Group anagram strings in an array
• Iterate through the array of strings

• For each string, sort the characters alphabetically

• Use a hashmap to group anagrams together based on sorted strings
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Q2. Reverse subset of array 'k'
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Reverse a subset of strings in an array 'k'
• Iterate through the array 'k' and reverse the strings within the specified subset range

• Use a temporary variable to swap the strings at the start and end of the subset range

• Ensure to handle edge cases like empty array or invalid subset range
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Have to write code snippet for serialization and deserialization in java

Q1. Code to explain Indian number plate system
Ans. 
Indian number plate system consists of a unique combination of letters and numbers to identify vehicles.
• Indian number plates consist of a combination of letters and numbers

• The first two letters indicate the state where the vehicle is registered

• Followed by a unique number assigned to the vehicle

• Some number plates may also include additional information like the vehicle class or fuel type
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Q2. To check if a string is palindrome with recusrion
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Check if a string is palindrome using recursion
• Create a recursive function that compares the first and last characters of the string

• If they match, call the function with the substring excluding the first and last characters

• Continue this process until the string length is 0 or 1, then return true if all characters matched

• Example: 'racecar' is a palindrome, 'hello' is not
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Q3. Oops concepts in java
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Oops concepts in Java refer to Object-Oriented Programming principles like Inheritance, Polymorphism, Encapsulation, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: Ability of an object to take on many forms.

• Encapsulation: Bundling of data with the methods that operate on that data.

• Abstraction: Hiding the implementation details and showing only the necessa
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Q1. Separate 1's and 0's in an array with minimal complexity
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Use two pointers approach to separate 1's and 0's in an array of strings with minimal complexity.
• Initialize two pointers, one at the beginning and one at the end of the array.

• Move the left pointer until it encounters a '0' and the right pointer until it encounters a '1'.

• Swap the elements at the left and right pointers, then move the pointers towards each other until they meet in the middle.
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Q2. How to automate filters in web page
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Automating filters in a web page involves identifying filter elements, selecting filter criteria, and verifying filtered results.
• Identify filter elements on the web page such as dropdowns, checkboxes, or input fields

• Use automation tools like Selenium to interact with filter elements and select desired criteria

• Trigger filter action (e.g. clicking 'Apply' button) and wait for the page to refresh with filtered results

• Veri...read more
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1. Prepare java string questions