# Software Development Engineer In Test (SDET) Interview Questions

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“Given a set of numbers -50 to 50, find all pairs that add up to a certain sum that is passed in. What's the O notation for what you just wrote? Can you make it faster? Can you find an O(n...” |

“Given a binary tree, how would you set the keys/values of all the nodes and their child pointers to null. No language restriction. Do it iteratively in O(N) time with O(1) space complexity where N...” |

“Describe and code an algorithm that returns the first duplicate character in a string?” |

“I was asked a pretty straight forward brain teaser during my last phone interview, which they said they don't normally do, but because I put that I was a logical problem solver on my resume they...” |

“given two linked lists with a digit in each node, add the two linked lists together. the result must be a linked list with one digit in each node. use only one iteration of the two input lists.” |

“In a BST write a program to find 2 nodes x and y such that X+y=k” |

“Given a triangle, determine if its a scalene, equilateral, isosceles or neither... required knowledge of triangle properties, I learnt these properties about two decades ago so ofcourse I was fuzzy...” |

“Write a function to find the maximum sum of sub array where the array can have negative and positive numbers.” |

“In a given sorted array of integers remove all the duplicates.” |

“Given an integer write a function that converts the input into a linkedList where each node corresponds to a number of the integer. Eg: 25697== 2 -> 5 -> 6 -> 9 -> 7 Then write a...” |

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