10+ Demag Cranes Interview Questions and Answers

A constructor is a special method used to initialize objects in a class. The main OOPs concepts are encapsulation, inheritance, and polymorphism.

• A constructor is called automatically when an object is created.

• It has the same name as the class and does not have a return type.

• Constructors can be used to set initial values for object attributes.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objects of different classes to be t...read more

Constructed data is organized and formatted, while unconstructed data is raw and unorganized.

• Constructed data is organized and formatted in a specific way for easy access and analysis.

• Unconstructed data is raw and unorganized, requiring processing before it can be used effectively.

• Examples of constructed data include databases, spreadsheets, and structured documents.

• Examples of unconstructed data include raw text files, images, and audio recordings.

A diode is a semiconductor device that allows current to flow in one direction only. The terminal of a diode includes an anode and a cathode.

• Diodes are commonly used in rectifier circuits to convert AC to DC.

• The anode of a diode is the positive terminal, while the cathode is the negative terminal.

• Diodes have a forward voltage drop, typically around 0.7V for silicon diodes.

• Reverse biasing a diode blocks current flow.

• Zener diodes are used for voltage regulation.

Creating a dynamic table with object key pair mapping.

• Create a table element in HTML

• Loop through the object and create table rows and cells dynamically

• Use object keys to map to table headers and values to map to table cells

Structured Query Language (SQL) is a programming language used to manage and manipulate relational databases.

• SQL is used to create, modify, and delete databases, tables, and data.

• It is used to retrieve data from databases using queries.

• SQL is used in various applications such as web development, data analysis, and business intelligence.

• Examples of SQL-based database management systems include MySQL, Oracle, and Microsoft SQL Server.

I rate myself 8 out of 10 in Java programming language.

• Strong understanding of object-oriented programming concepts

• Experience in developing web applications using Java frameworks like Spring

• Proficient in writing efficient and scalable code

• Familiar with Java libraries and tools for testing and debugging

• Continuous learning and improvement in Java programming skills

Use the delay() method in jQuery to add delay for animation.

• Use the delay() method before the animation function.

• Specify the duration of the delay in milliseconds as an argument.

• Example: $(element).delay(1000).fadeOut();

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

• Transistors are fundamental building blocks of modern electronic devices.

• They can amplify signals, regulate currents, and act as switches.

• Common types of transistors include bipolar junction transistors (BJTs) and field-effect transistors (FETs).

Pseudo classes are keywords used to define a special state of an element.

• Pseudo classes start with a colon (:)

• They are used to style elements based on their state or position

• Examples include :hover, :active, :first-child, :nth-child

• Pseudo classes can be combined with selectors to target specific elements

I will highlight the unique features of the pen and demonstrate its usefulness in various scenarios.

• Highlight the pen's sleek design and comfortable grip

• Emphasize the pen's smooth writing experience and quick-drying ink

• Demonstrate the pen's versatility by showcasing its ability to write on different surfaces

• Create a sense of urgency by mentioning limited stock or a special promotion

Cloud computing refers to the delivery of computing services over the internet.

• Cloud computing allows users to access data and applications from anywhere with an internet connection

• It offers scalability, flexibility, and cost-effectiveness compared to traditional on-premises computing

• Examples of cloud computing services include Amazon Web Services, Microsoft Azure, and Google Cloud Platform