Finisar Interview Questions and Answers

OOPs feature is encapsulation, inheritance, and polymorphism.

• Encapsulation: bundling of data and methods that manipulate the data within a single unit.

• Inheritance: ability of a class to inherit properties and characteristics from its parent class.

• Polymorphism: ability of objects to take on many forms or have multiple behaviors.

• Examples: Java, C++, Python, Ruby, etc.

To declare wearables variable, use an array of strings.

• Declare a variable named 'wearables' and assign an empty array to it: let wearables = [];

• Add strings representing different wearables to the array: wearables.push('Fitbit', 'Apple Watch', 'Garmin');

• Access individual wearables using their index: console.log(wearables[0]); // Output: Fitbit

Decode and Case are SQL functions used for manipulating data.

• Decode is used to replace a value with another value based on a condition.

• Case is used to perform conditional logic and return a value based on the condition.

• Decode is specific to Oracle databases while Case is more widely used.

• Example of Decode: SELECT DECODE(column_name, 'value1', 'replacement1', 'value2', 'replacement2', 'default')

• Example of Case: SELECT CASE WHEN column_name = 'value1' THEN 'replacement1' WHEN c...read more

To set wearables, you need to connect them to a compatible device, download the corresponding app, and follow the instructions for setup.

• Connect the wearable device to a compatible smartphone or computer via Bluetooth or USB.

• Download the corresponding app for the wearable device from the app store or official website.

• Follow the on-screen instructions to create an account, pair the device, and customize settings.

• Ensure the wearable device is charged and properly positioned on ...read more

Procedures are a set of instructions executed sequentially, while functions return a value and can be called multiple times.

• Procedures are used to perform a set of instructions in a specific order.

• Functions are used to return a value and can be called multiple times.

• Procedures do not return a value, while functions do.

• Functions can have parameters, while procedures may or may not have parameters.

Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

• Abstract classes can have constructors, fields, and non-abstract methods.

• Interfaces can only have abstract methods and constants.

• A class can implement multiple interfaces, but can only inherit from one abstract class.

• Abstract classes are used to define a common behavior for subclasses, while interfaces define a contract for classes to implement.

Stored procedures are precompiled SQL queries stored in the database, while functions are reusable blocks of code that return a value.

• Stored procedures are used for executing a set of SQL statements, while functions are used to perform specific tasks and return a value.

• Stored procedures can have input and output parameters, while functions always return a value.

• Stored procedures can modify data in the database, while functions are read-only.

• Stored procedures are stored in the...read more