Nokia Networks Sdet Lead Interview Questions and Answers

Q1 - Delete all entries of a given number from a linked list.
Q2 - Find inorder traversal of a BST (with and without recursion).

Q1. Array based problems
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Q2. Reverse integer
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C, C++, OS, aptitute test, OS concepts

Q1. C, C++ data structures
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Q2. Concept of pointers,double pointers
Ans. 
Pointers are variables that store memory addresses of other variables. Double pointers store memory addresses of pointers.
• Pointers are used to access and manipulate memory addresses of variables.

• Double pointers are used to store memory addresses of pointers themselves, allowing for indirect access to variables.

• Example: char *ptr; int **dptr;
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Q3. Lists, data structures, coding mcqs
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Q1. Are you planning to do Masters?
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30 mcq's OF coding and 30 mcq's of apti

Q1. Oops,computer networks
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Q2. 4 pillars of oops , tcp ip model ,osi model
Ans. 
4 pillars of OOPs are Abstraction, Encapsulation, Inheritance, and Polymorphism. TCP/IP and OSI models are networking models.
• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions together and restricting access to them.

• Inheritance: Creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: Ability of objects to tak...read more
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DSA and Python based questions

They ask us 40 mcqs and 2 coding questions. Mcqs are from networking,OS,DS,Ada and also have questions of general aptitude like direction,blood relation. Coding question are not easy both the questions are from Graph.

Q1. Subnetting, Supernetting,IPv4,Linkedlist,
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Q2. Find unique character from a string and optimize it
Ans. 
Find unique character from a string and optimize it
• Use a hash table to store the frequency of each character in the string

• Iterate through the hash table to find the character with frequency 1

• If there are multiple characters with frequency 1, return the first one

• Optimization: Stop iterating through the hash table once a character with frequency 1 is found
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They give me a scenario like you have to go from place A to place B then what should You consider.

Basic Easy Level LeetCode Questions.

Medium Level Questions from LeetCode along with questions on String and one scenario based DS question.

Q1. Manager Round where he asked me about my past experience and some basic day to day tasks
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Q1. How to reverse the link list? find all possible sub sequences in a given array
Ans. 
Reverse a linked list and find all possible subsequences in a given array.
• To reverse a linked list, iterate through the list and change the next pointers of each node to the previous node.

• To find all possible subsequences in an array, use recursion and generate all possible combinations of elements.

• For example, given the array [1, 2, 3], the possible subsequences are [], [1], [2], [3], [1, 2], [1, 3], [2, 3], [1, 2, 3]
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