Bacancy Technology Web Developer Interview Questions and Answers

The first round of the interview includes Data Structures and Algorithms (DSA).

The second round of interviews involves a project.

Very basic aptitude questions along with few coding questions

Q1. A problem statement was given and we had to provide an optimal approach to design and handle that problem
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Q2. Oops concepts, SQL queries
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Basic Programming questions will be there

Q1. Why Java is most secured!?
Ans. 
Java is most secured due to its strong memory management, bytecode verification, and security manager.
• Java's strong memory management prevents buffer overflow and other memory-related vulnerabilities.

• Bytecode verification ensures that the code is safe to execute and prevents malicious code from running.

• Security manager allows fine-grained control over access to system resources.

• Java also has a robust set of security AP...read more
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Q2. Explain how Java program execute?
Ans. 
Java programs are executed by the Java Virtual Machine (JVM) which interprets and executes the bytecode generated by the Java compiler.
• Java source code is compiled into bytecode by the Java compiler

• The bytecode is platform-independent and can be executed on any device with a JVM

• The JVM interprets the bytecode and executes the instructions

• The JVM manages memory, handles exceptions, and provides other runtime services

• Exa
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Q1. Communication and basic technical questions
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Difficulty level is medium

Q1. Medium about java and database
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Q1. Medium level - about project
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Q1. Why strings are immutable
Ans. 
Strings are immutable to ensure data integrity and security by preventing accidental or intentional modification.
• Immutable strings prevent accidental changes to data

• Enhances security by preventing data tampering

• Allows for efficient memory management
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Q2. Count the number of repeated words from the given string
Ans. 
Count the number of repeated words in a given string
• Split the string into words using a delimiter like space

• Create a hashmap to store word frequencies

• Iterate through the words and update the hashmap accordingly

• Count the number of words with frequency greater than 1
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Q1. What is abstract class?
Ans. 
Abstract class is a class that cannot be instantiated and may contain abstract methods.
• Cannot be instantiated directly

• May contain abstract methods that must be implemented by subclasses

• Can have both abstract and non-abstract methods

• Used for creating a template for other classes to inherit from
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Q2. What is sub query and Like operator?
Ans. 
A subquery is a query nested within another query, and the LIKE operator is used in SQL to search for a specified pattern in a column.
• A subquery is enclosed in parentheses and executed first before the main query.

• The result of a subquery can be used in comparison with the main query's result.

• The LIKE operator is used with the WHERE clause to search for a specified pattern in a column.

• The LIKE operator allows for wildca...read more
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Q1. Java coding and development
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Q2. Db and development skills
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