PerfectKode Software Technologies Software Developer Interview Questions and Answers

Q1. Write any sorting algorithm
Ans. 
Bubble Sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order.
• Compare each pair of adjacent elements in the array and swap them if they are in the wrong order

• Repeat this process until no more swaps are needed, indicating that the array is sorted

• Time complexity of O(n^2) in the worst case scenario

• Example: ['banana', 'apple', 'c...read more
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Q2. Write the search in binary search tree function
Ans. 
Function to search for a value in a binary search tree
• Start at the root node

• Compare the value to the current node's value

• If the value is less, move to the left child node; if greater, move to the right child node

• Repeat until the value is found or the node is null
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Q3. Basic DBMS questions about joins and keys
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Q4. Linear searching vs binary searching code
Ans. 
Linear search compares each element in a list sequentially, while binary search divides the list in half at each step.
• Linear search has a time complexity of O(n), while binary search has a time complexity of O(log n).

• Linear search is suitable for small lists, while binary search is more efficient for larger sorted lists.

• Example: Linear search - searching for a name in an unsorted phone book. Binary search - searching f...read more
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Q5. Print all the prime numbers from 1 to n
Ans. 
Use a loop to check for prime numbers from 1 to n
• Iterate from 1 to n and check if each number is prime

• A prime number is only divisible by 1 and itself

• Start checking divisibility from 2 up to the square root of the number
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Generally, they ask questions related to data structures and algorithms, focusing on the basics rather than high-level concepts, as well as the fundamentals of object-oriented programming (OOP).

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