Persistent Systems Software Engineer Interview Questions, Process, and Tips

Basic aptitude questions asked

From strings and arrays

Q1. Tell me about yourself
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Q2. Your projects, your tech stack you worked
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Basics on Arrays , strings

Q1. Programming questions
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Q2. Pattern printing ,reverse of strings
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Q1. What are your strengths
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Question from hackerearth practice questions. Medium difficulty.

Design a elevator system using pseudo code.

Q1. Basics on oops, one basic quiz, questions on college project.
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Basic questions of core CS subjects like OS, CN, DS, OOP, Computer Organization, Programming concepts.

Q1. 1. Pattern Printing Program
Ans. 
A program to print patterns using arrays of strings.
• Create an array of strings to hold the pattern

• Use loops to fill the array with the desired pattern

• Print the array to display the pattern
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Q2. 2. Reverse the given array and store it in the same variable (Do not use temporary array for reverse operation).
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Q3. 3. Write a query to demonstrate outer join on given tables.
Ans. 
Demonstrate outer join using SQL query
• Use LEFT OUTER JOIN or RIGHT OUTER JOIN to include all records from one table and matching records from another table

• Use the ON keyword to specify the join condition

• Use COALESCE function to handle NULL values in the result set
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Q1. Why should we hire you?
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Q2. What is your family background?
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Q3. Where do you see yourself in 5 years?
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Q4. What are your strengths and weaknesses?
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Q5. Tell me about yourself.
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