PCB Apps Interview Questions and Answers

1 round is coding round in pan paper test atleast 5 coding questions and some multiple questions and 1 DSA questions and 4 coding questions correct and dsa correct than interview

Q1. Problem-solving using Java.
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Q2. SQL queries to solve problems.
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Q1. SQL and Java basics. Write some code to solve problems.
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Q2. System design problems
Ans. 
System design problems involve designing scalable and efficient software systems.
• Consider scalability, reliability, and performance requirements

• Break down the system into smaller components and define their interactions

• Choose appropriate technologies and architecture patterns

• Optimize for performance and consider fault tolerance

• Consider data storage, caching, and load balancing strategies
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Q1. Behavioral questions, general talks. Interests and passion for software development.
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Q2. Talks about the product and salary discsussion
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Q1. Personal questions and about the company.
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Q2. Discussion on company culture and benefits.
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Aptitude test, basic maths and LR

SQL and Visualisation related

Q1. Asked for details after qualifying in test
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Basic Aptitude test and personality test, It's easy

Q1. Code to print diagonal elements in 2d array. Reverse a string without using other empty string.
Ans. 
Print diagonal elements in a 2D array and reverse a string without using an empty string.
• Iterate through the rows and columns of the 2D array and print the elements where the row index is equal to the column index.

• Iterate through the characters of the string from the last index to the first index and append each character to a new string.
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Aptitude, reasoning,java MCQS

Q1. Technical round
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Q1. Second technical round
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Q1. HR and package discussion
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Q1. Level order traversal of tree similar question
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Q2. Sql window function based question
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Q3. Design a key generator
Ans. 
A key generator is a tool used to create unique keys for various purposes.
• Use a combination of letters, numbers, and special characters to create a unique key

• Consider using a hashing algorithm to generate the key

• Ensure the key is sufficiently long and random to minimize the chance of collisions
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The aptitude test was easy. basic mcq questions were asked.

It was a pen paper test and was comparatively tough.

Pen and paper test
C and C++ output questions
Basic flowchart question
Only 3 out of 60 students were selected

Q1. After writing about your project CFO will take interview my tech stack didn't meet companies requirement hence all three students were rejected.
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