Kellton Senior Software Engineer Interview Questions and Answers for Experienced

Coding test was on Java programs. Basically for loop programs.

Basic questions easy to crack. Basic programming knowledge.

Q1. Oops questions, multithreading, Exception , String .
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Q1. About salary discussion only
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Aptitude test with aptitude based questions

Q1. What is variable hoisting.
Ans. 
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
Ans. 
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. How do you read an external text file
Ans. 
To read an external text file, you can use file handling techniques in programming languages like Python or Java.
• Use file handling functions like open(), read(), and close() in Python to read an external text file.

• In Java, use classes like FileReader and BufferedReader to read text files.

• Specify the file path and mode (read mode) when opening the file.

• Read the contents of the file line by line or as a whole, depending ...read more
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Q2. Write a java program to find the occurrences of characters
Ans. 
Java program to find occurrences of characters in a string
• Create a HashMap to store characters and their counts

• Iterate through the string and update the counts in the HashMap

• Print the characters and their counts from the HashMap
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Q1. You should have basic understanding of technologies mentioned in your profile
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Q1. This is one level up. Practical questions related to your work
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Q1. Tell me about yourself.
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Q2. What are your strengths and weaknesses?
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