Sonata Software Software Engineer Interview Questions, Process, and Tips

Q1. Python questions
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Q1. Design a linked list
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A linked list is a data structure consisting of nodes where each node points to the next node in the sequence.
• Nodes contain data and a reference to the next node

• Can be singly linked (each node points to the next) or doubly linked (each node points to the next and previous)

• Operations include insertion, deletion, traversal, and searching

• Example: Node { data: 5, next: Node { data: 10, next: null } }
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Q2. Implement binary search
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Binary search is a divide and conquer algorithm that efficiently finds the target value in a sorted array.
• Start by defining the low and high indices of the array.

• Calculate the mid index as (low + high) / 2.

• Compare the target value with the value at the mid index and adjust the low and high indices accordingly.

• Repeat the process until the target value is found or the low index surpasses the high index.
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Q1. Sorting algorithm to use when 70% of numbers are sorted
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Use a modified version of Merge Sort or Tim Sort for efficient sorting when 70% of numbers are already sorted.
• Consider using Merge Sort with optimizations for nearly sorted arrays, such as checking for already sorted subarrays before merging.

• Tim Sort, a hybrid sorting algorithm derived from Merge Sort and Insertion Sort, is also a good choice for partially sorted arrays.

• Both algorithms have a time complexity of O(n log...read more
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Q2. What is virtual destructor in c++
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A virtual destructor in C++ is used to ensure that the correct destructor is called when deleting an object through a base class pointer.
• Virtual destructors are necessary when deleting an object through a pointer to a base class in order to properly call the derived class destructor.

• Without a virtual destructor, only the base class destructor would be called, potentially leading to memory leaks or undefined behavior.

• Ex...read more
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Q3. What is overflow in c++ ?
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Overflow in C++ occurs when a value is too large to be stored in the data type, leading to unexpected behavior.
• Overflow can happen when adding two large numbers, causing the result to exceed the maximum value that can be stored in the data type.

• For example, adding 2147483647 + 1 to an int data type in C++ will result in overflow, wrapping around to -2147483648.

• To prevent overflow, it is important to check for potential...read more
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Q1. About the previous experience
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Q2. Explained in detail about the past works taken
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It was pretty simple like all the other aptitude tests

Q1. Tell me something about you that is not mentioned in your resume
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Q2. Tell me about your weaknesses
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