Virtusa Consulting Services Consultant Interview Questions and Answers

I use commands like ls, cd, grep, and chmod in my daily routines on Linux.

• ls - list directory contents

• cd - change directory

• grep - search for specific patterns in files

• chmod - change file permissions

Oops concepts refer to Object-Oriented Programming concepts which include inheritance, polymorphism, encapsulation, and abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: Allows objects to be treated as instances of their parent class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Abstraction: Hides the complex implementation details and only shows the necessary features to the outs...read more

Tags are labels or keywords that are used to categorize or organize information. Hooks are functions that allow customization or extension of a software system.

• Tags are used to classify or group related information together.

• They can be used in various contexts such as organizing files, categorizing blog posts, or labeling products.

• Hooks are functions that enable developers to modify or extend the behavior of a software system.

• They are often used in programming frameworks or l...read more

Handling exceptions involves identifying and responding to unexpected errors or events in a program.

• Use try-catch blocks to catch and handle exceptions

• Handle specific exceptions separately for more precise error handling

• Use finally block to execute code regardless of whether an exception occurred

• Throw custom exceptions to provide meaningful error messages

• Log exceptions to aid in debugging and troubleshooting

Optimization techniques are methods used to improve efficiency and performance in various processes.

• Use mathematical optimization models to find the best solution

• Consider constraints and objectives when optimizing

• Common techniques include linear programming, genetic algorithms, and simulated annealing