Jekson Vision Software Engineer Interview Questions and Answers

Q1. Basics of Manual and Automation Testing
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Q1. Basics of SQL,Selenium,Core Java
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Q1. Salary Discussion and Company Standards.
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Q1. Regrading Self join query
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A self join query is used to join a table to itself in a SQL query.
• Self join is used when a table needs to be joined with itself to compare rows within the same table.

• It requires aliasing the table with different names to distinguish between the two instances of the same table.

• Commonly used in hierarchical data structures or when comparing related rows in a table.
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Q2. Group by query per catagory
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Group by query is used to group data based on a specific category.
• Use the GROUP BY clause in SQL to group data based on a specific column

• Aggregate functions like COUNT, SUM, AVG can be used with GROUP BY to perform calculations on grouped data

• Example: SELECT category, COUNT(*) FROM products GROUP BY category
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It placed in hackerRank.question difficulty level was medium.

Q1. The difficulty depends upon who is taking your interview. But mostly asked questions were related to string and hashmap.
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Q1. It was more like a little bit technical and hr round. Mostly talk about personal profile like education,family background, hobbies and etc.
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Q1. What is threading
Ans. 
Threading is a programming technique that allows multiple tasks to run concurrently within a single process.
• Threading allows for parallel execution of tasks within a program.

• Threads share the same memory space, allowing for efficient communication and data sharing.

• Examples of threading in programming languages include Java's Thread class and Python's threading module.
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Q2. 7 layer of networking
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The 7 layers of networking refer to the OSI model, which is a conceptual framework used to understand how networks operate.
• Physical layer: Deals with physical connections and hardware (e.g. cables, switches)

• Data link layer: Manages data transfer between devices on the same network (e.g. Ethernet)

• Network layer: Handles routing and forwarding of data packets (e.g. IP)

• Transport layer: Ensures data is delivered reliably an...read more
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Q1. Prev salary and prev experience(even if you fake it you can pass interview, he is dumb about software development)
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Q2. What is your expectation
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My expectation is to work in a challenging environment where I can utilize my skills to contribute to the success of the team and company.
• Expectation to work on complex projects that require problem-solving skills

• Desire to collaborate with talented team members to achieve common goals

• Opportunity for continuous learning and professional growth

• Expectation for clear communication and feedback from management
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Medium level leetcode

Q1. Basics of linked list. How to delete without head and address of current node is given?
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Q2. Simple join queries on 2 to 3 tables?
Ans. 
Join queries are used to combine data from multiple tables based on a related column between them.
• Use JOIN keyword to combine tables based on a common column

• Specify the columns to select from each table

• Use WHERE clause to specify the join condition
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Q1. To write any code in any programming language
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Q2. About the project work that i have done
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Q1. Time was 3:15 in the clock write an code to find the angle between the hour and minute hand
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Q2. About the project work
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