Accenture interview questions

Preview Questions

1. Explain the difference between abstract classes and interfaces in Java with real-world examples.

   Abstract classes in Java are classes that cannot be instantiated directly and may contain both abstract methods (without implementation) and concrete methods (with implementation). They support constructors, instance...

2. How does call by value differ from call by reference? Explain with memory allocation perspective.

   Call by value means that when you pass a variable to a function, a copy of the variable's value is created and passed to the function. Any modifications made to the parameter inside the function affect only the local...

3. Describe normalization in databases and explain each normal form with practical examples.

   Database normalization is the process of organizing data to minimize redundancy and dependency, improving data integrity and reducing anomalies during insertions, updates, and deletions. First Normal Form (1NF) requires...

4. Compare PRIMARY KEY and UNIQUE KEY constraints with detailed use cases

   A PRIMARY KEY is a column or combination of columns that uniquely identifies each row in a table. Every table can have only one primary key, and it cannot contain NULL values. The primary key enforces entity integrity,...

5. Explain the OSI model and describe the function of each layer with real-world protocols.

   The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes network communication functions into seven distinct layers, enabling different systems to communicate regardless of their internal...

6. How do you handle exceptions in programming? Explain best practices and exception hierarchy.

   Exception handling is a mechanism for managing runtime errors gracefully, preventing program crashes and providing meaningful error messages to users. In Java, exceptions are objects representing error conditions,...