CBSE Class 12 - Informatics Practices - Java GUI Programming – Tour III (Q and A) (#cbseNotes)

Java GUI Programming – Tour III (Q and A)JOptionPane : Built-In Dialog of JAVA

JOptionPane allows to create pop-up window or dialog with predefined style.

It provides following types of Dialogs which can be used as per requirement.


① Dialog Type: MessageDialog
Method used: showMessageDialog();
It is used to inform user by displaying a message. It includes OK button only.


② Input Dialog
Method: showInputDialog();
Used to get user input using Text Field.

③ Confirm Dialog
Method: showConfirmDialog();
Used to ask a user to confirm some information with Yes/No or OK/Cancel buttons.

CBSE Class 10 - Geography - Minerals and Energy Resources (Short Q and A) (#cbseNotes)

Class 10 - Geography Minerals and Energy Resources (Short Q and A)

Q1: What are Placer deposits?

Answer: Minerals that occur as alluvial fans in sands of valley floors, and the base of hills.


Q2: Define Rat-hole Mining.

Answer: In the tribal areas of North-East India mining is carried out by individuals or communities illegally. The mining is done in the form of a long narrow tunnel known as Rat hole mining.


Q3: Write two uses of Mica and also areas famous for mica deposits.

Answer: Mica is used in electric and electronic industries
Areas found in:
(a) Gaya-Hazaribagh inJharkhand, and
(b)Ajmer and Beawarin Rajasthan

CBSE Class 11 - Business Studies - Chapter 4 - Business Services - Insurance Services (#cbseNotes)

Insurance Services

(Chapter Notes)

Q: Define Insurance.

Answer: Life is full of uncertainties and risks. Insurance is a means of providing against loss caused by natural or man-made factors. It is a contract or agreement under which one party agrees in return for a consideration (called premium which maybe monthly , quarterly, half yearly or annually) to pay in agreed amount of money to another party to make good a loss, damage, or injury to something of value.


Q: What are the functions of Insurance?

CBSE Class 10 - Chemistry - Ch5 - Periodic Classification Of Elements (Concept Points) (#cbseNotes)

PERIODIC CLASSIFICATION OF ELEMENTS (Concept Points)

Modern Periodic Table
credits: By Mbenzdabest (Own work) [CC BY-SA 4.0 ],
via Wikimedia Commons

1. Early chemists classified elements as metals and non-metals on the basis of a set of physical and chemical properties.

2. Dobereiner classified elements on the basis of “Law of Triads” which states that “atomic mass of the middle element of a triad is almost the arithmetic mean of the other two elements”.


3. A triad of elements is a group of three elements arranged in the order of increasing atomic masses, such that a group of such elements have similar physical and chemical properties.


4. Newland classified elements on the basis of “Law of Octaves” stated by him. According to
this law :
“When the elements are arranged in the order of increasing atomic mass, the properties of the eighth element (starting from a given element) are a repetition of the properties of the first element.”

CBSE Class 9 - Biology - Why Do We Fall ill? ( Important Terms to Remember) (#cbseNotes)

Why Do We Fall Ill?  Important Terms to Remember 

Here a few definitions are listed. Can you identify the terms defined here.


Decrease in number of RBCs and heamoglobin concentration.


A condition in which the normal functioning of the body or any part of it is damaged or disturbed.


A rapidly appearing disease, which lasts only in a few days.


A long lasting or a persisting disease.

CBSE Class 8 - Science - Ch 8 - Cell Structure and Functions (Worksheet) (#cbseNotes)

Cell Structure and Functions (Worksheet) 

Fill in the blanks

1. ______ is the structural and functional unit of life.


2. All living organisms are made of ______.


3. Cells were first observed by ____________ in 1665.


4. Antonie van Leeuwen hook was the first to see __________ under microscope which he had constructed himself

CBSE Class 12 - Informatics Practices - Java GUI Programming - Revision Tour-2 (Q & A)

Java GUI Programming - Revision Tour-2
(Q & A)

Questions and Answers

Q: What is Netbeans? Write about its three important features.

Answer: Netbeans is an open source, Integrated Development Environment (IDE) tool for developing Java applications. 

1. Its a RAD (rapid application development) tool that allows us to develop applications by dragging and positioning GUI components from a palette onto a container.

2. Its GUI builder automatically takes care of the correct spacing and alignment of the different components relative to each other.

3. It has in built support for Java Compiler, interpreter and debugger.

4. It has in built text editor with syntax highlighting.