Lexmark International Software Engineering Manager Interview Questions and Answers

The aptitude round had the topics of train and distance and time , OOPS , Core Java , JavaScript questions , Operating System questions and DBMS questions.

Q1. Had some data structures and algorithm questions and graph , dynamic programming questions
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Q2. Questions in the datastructures
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Q1. What are the main principles of the Java
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Q2. What is the different between == and equals method
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Q1. What is jdk, string related questions, basic java oops questions?
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Q1. What is a pointer to pointer
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Q2. Class, object, inheritance, polymorphism,dbms
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Q1. What do u mean by data
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Q2. What is preprocessed data
Ans. 
Preprocessed data is data that has been cleaned, transformed, and organized for analysis or modeling.
• Preprocessed data is often used in machine learning and data analysis to improve the accuracy and efficiency of models.

• Common preprocessing steps include removing missing values, scaling features, and encoding categorical variables.

• Examples of preprocessing techniques include normalization, standardization, one-hot enco...read more
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Q3. What do u mean by info
Ans. 
Info refers to data or knowledge that provides details or context about a specific topic or subject.
• Info can be in the form of facts, statistics, or explanations.

• It helps to understand a topic better or make informed decisions.

• Examples of info include news articles, research papers, and educational resources.
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Q4. How to copy from 2 tables and paste in 3rd one in sql
Ans. 
Use SQL INSERT INTO SELECT statement to copy data from 2 tables and paste into a 3rd table.
• Use INSERT INTO SELECT statement to copy data from 2 tables and paste into a 3rd table.

• Specify the columns you want to copy from each table in the SELECT statement.

• Make sure the columns in the SELECT statement match the columns in the 3rd table where you are pasting the data.
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Q5. Reverse string using any language you know
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Q6. A puzzle question was asked but i don't remeber it.
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Two sections :
in 1st section aptitude and verbal test and 2nd section technical

Q1. Introduction of yourself
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Q2. What is angular
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Q1. Lamda experience
Ans. Good
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90 min MCQ +coding test on hackerrank.

Q1. Sort colors DSA question
Ans. 
Sort an array of colors represented as strings in a specific order: red, white, and blue.
• Use the Dutch National Flag algorithm for efficient sorting.

• Iterate through the array and maintain three pointers: low, mid, and high.

• Swap elements based on their color: red (0), white (1), blue (2).

• Example: Input: ['blue', 'white', 'red', 'red', 'blue'], Output: ['red', 'red', 'white', 'blue', 'blue'].
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Q2. Detect cycle in a linked list
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Q1. Was asked about why you want to join the company,my experience etc.
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