Winjit Technologies Senior Software Engineer Interview Questions and Answers for Experienced

Q1. Java related questions core java
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Aptitude test with aptitude based questions

Q1. What is variable hoisting.
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Variable hoisting is a behavior in JavaScript where variable declarations are moved to the top of their scope during compilation.
• Variable declarations are hoisted to the top of their function or global scope.

• Only the declarations are hoisted, not the initializations.

• This can lead to unexpected behavior if variables are accessed before they are declared.
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Q2. What is closures in js
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Closures in JavaScript allow functions to access variables from an outer function even after the outer function has finished executing.
• Closures are created whenever a function is defined within another function.

• Inner functions have access to the outer function's variables even after the outer function has returned.

• Closures are commonly used to create private variables and functions in JavaScript.

• Example: function outer...read more
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Q1. Arrays and array list questions
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Q2. Basic java concepts
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Q1. Arrange of characters in arrays
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Arrange characters in arrays by sorting or manipulating strings for various applications.
• Use built-in sorting functions: In Python, use sorted() to arrange strings alphabetically. Example: sorted(['banana', 'apple']) returns ['apple', 'banana'].

• Custom sorting: Implement a custom sort function to arrange strings based on specific criteria, like length or character frequency.

• Reversing strings: Use slicing to reverse stri...read more
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Q2. SQL query to find value using joins
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SQL joins combine rows from two or more tables based on related columns, enabling complex queries and data retrieval.
• Use INNER JOIN to return records with matching values in both tables. Example: SELECT * FROM Orders INNER JOIN Customers ON Orders.CustomerID = Customers.CustomerID;

• LEFT JOIN returns all records from the left table and matched records from the right table. Example: SELECT * FROM Customers LEFT JOIN Order...read more
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