Comba Telecom Interview Questions and Answers

There are two types of smokes: first-hand smoke and second-hand smoke.

• First-hand smoke is the smoke inhaled directly from a cigarette or other tobacco product.

• Second-hand smoke is the smoke exhaled by a smoker or the smoke from the burning end of a cigarette.

• Second-hand smoke is also known as passive smoking and can be harmful to non-smokers.

• There are also different types of tobacco products that produce smoke, such as

Alternator is a device that converts mechanical energy into electrical energy.

• It is used in vehicles to charge the battery and power the electrical system.

• It works by using a magnetic field to generate an alternating current.

• The output voltage is regulated by a voltage regulator.

• It is an essential component of the vehicle's charging system.

• Examples of vehicles that use alternators include cars, trucks, and motorcycles.

Petrol and diesel engines differ in fuel type, combustion process, and efficiency.

• Fuel type: Petrol engines use gasoline while diesel engines use diesel fuel.

• Combustion process: Petrol engines use spark ignition while diesel engines use compression ignition.

• Efficiency: Diesel engines are generally more fuel-efficient than petrol engines.

• Examples: Petrol engine - used in most cars; Diesel engine - used in trucks and hea

The differential is a component in a vehicle that allows the wheels to rotate at different speeds.

• It helps with turning by allowing the outside wheel to rotate faster than the inside wheel.

• It also helps with traction by allowing the wheel with the most grip to receive more power.

• Without a differential, the wheels would be locked together and unable to rotate at different speeds.

• Examples of vehicles that use differentia

JOINS are used in SQL to combine data from two or more tables based on a related column.

• Inner JOIN returns only the matching rows from both tables

• Equi JOIN is a type of Inner JOIN where the join condition is based on equality between two columns

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

Divide array in two halves and keep each half in ascending order without using new Array.

• Use Array.sort() method to sort the original array

• Use Array.slice() method to divide the array into two halves

• Use Array.reverse() method to reverse the second half of the array

Interfaces are contracts that define a set of methods and properties that a class must implement.

• Interfaces provide a way to achieve abstraction and polymorphism in object-oriented programming.

• They allow for loose coupling between classes and promote code reusability.

• Interfaces can be used to define common behavior across multiple classes.

• Example: IDisposable interface in C# ensures that an object can be properly dispo...read more

Inheritance is a mechanism in object-oriented programming where a class is based on another class.

• Inheritance allows a subclass to inherit properties and methods from a superclass.

• The subclass can also add its own properties and methods.

• Examples include a Car class inheriting from a Vehicle class, or a Dog class inheriting from an Animal class.

Possible reasons for an unreachable URL

• Server is down

• Incorrect URL

• DNS resolution failure

• Firewall or security settings

• Network connectivity issues

Yes, I know Java.

• I have experience in Java programming.

• I am familiar with Java syntax and concepts.

• I have worked on Java projects in the past.

To retrieve data from the back end, you can use APIs or database queries.

• Use API calls to fetch data from the back end server.

• Execute database queries to retrieve data from the database.

• Parse the response or query result to extract the required data.

• Handle any necessary authentication or authorization for accessing the back end.

• Examples: GET request to an API endpoint, SELECT query in SQL.

OOP is a programming paradigm based on the concept of objects, which can contain data and code.

• OOP stands for Object-Oriented Programming

• It focuses on creating objects that interact with each other to solve a problem

• Encapsulation, inheritance, and polymorphism are key concepts in OOP

• Example: A car object can have properties like color, make, and model, and methods like start and stop

• OOP promotes code reusability and ma

I am open to working in any location as long as the job is challenging and rewarding.

• Open to relocation

• Prioritize job satisfaction over location

• Flexible with work arrangements