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PROBLEM SOLVING AND PYTHON PROGRAMMING QUIZ

1) What is the first step in problem-solving? A) Writing code B) Debugging C) Understanding the problem D) Optimizing the solution Answer: C 2) Which of these is not a step in the problem-solving process? A) Algorithm development B) Problem analysis C) Random guessing D) Testing and debugging Answer: C 3) What is an algorithm? A) A high-level programming language B) A step-by-step procedure to solve a problem C) A flowchart D) A data structure Answer: B 4) Which of these is the simplest data structure for representing a sequence of elements? A) Dictionary B) List C) Set D) Tuple Answer: B 5) What does a flowchart represent? A) Errors in a program B) A graphical representation of an algorithm C) The final solution to a problem D) A set of Python modules Answer: B 6) What is pseudocode? A) Code written in Python B) Fake code written for fun C) An informal high-level description of an algorithm D) A tool for testing code Answer: C 7) Which of the following tools is NOT commonly used in pr...

Java important question - 6

Q) What is the difference between abstract class and interface ?
Answer :
1) The abstract keyword is used to declare  abstract class. 
The interface keyword is used to declare interface.
2) Abstract class have all the features of a normal java class except that we can't instantiate it. We can use abstract keyword to make a class abstract but interfaces are a completely different type and can have only public static final constants and method declarations.
3) Abstract class can have abstract and non abstract methods. Interface can have only abstract methods.
4) Abstract class can have final, non-final, static and non-static variables. Interface has only static and final variables.
5) A java abstract class can have class members like private, protected,etc. Members of a java interface are public by default.
6) Abstract classes can have constructors but interface can't have constructors.
7) A subclass can extend only one abstract class but it can implement multiple interfaces.
8) We can run abstract class if it has main() method whereas we can't run an interface.

Q) What is the use of System class ?
Answer:
          The java.lang.System class is one of the core classes. System class comes with many Static methods and using these methods it is possible to take keyboard input, knowing system time, copying an array element into another, to advise to go for garbage collection and to know the system properties etc.
          System class is final so that we can't subclass and override it's behaviour through inheritance. System class doesn't provide any public constructors, so we can't instantiate this class and that's why all of it's methods are static.
Fields:
Following are the fields for java.lang.System class
* static PrintStream err - This is the "standard" error output stream.
* static InputStream in - This is the "standard" input stream.  
* static PrintStream out - This is the "standard" output stream.

Q) What is instanceof keyword ?
          The java instanceof keyword is used to test whether the object is an instance of the specified type.
          The instanceof in java is also known as type comparison operator because it compares the instance with type. It returns either true or false. If we apply the instanceof operator with any variable that has null value, it returns false.

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Abbreviations

No :1 Q. ECOSOC (UN) Ans. Economic and Social Commission No: 2 Q. ECM Ans. European Comman Market No : 3 Q. ECLA (UN) Ans. Economic Commission for Latin America No: 4 Q. ECE (UN) Ans. Economic Commission of Europe No: 5 Q. ECAFE (UN)  Ans. Economic Commission for Asia and the Far East No: 6 Q. CITU Ans. Centre of Indian Trade Union No: 7 Q. CIA Ans. Central Intelligence Agency No: 8 Q. CENTO Ans. Central Treaty Organization No: 9 Q. CBI Ans. Central Bureau of Investigation No: 10 Q. ASEAN Ans. Association of South - East Asian Nations No: 11 Q. AITUC Ans. All India Trade Union Congress No: 12 Q. AICC Ans. All India Congress Committee No: 13 Q. ADB Ans. Asian Development Bank No: 14 Q. EDC Ans. European Defence Community No: 15 Q. EEC Ans. European Economic Community No: 16 Q. FAO Ans. Food and Agriculture Organization No: 17 Q. FBI Ans. Federal Bureau of Investigation No: 18 Q. GATT Ans. General Agreement on Tariff and Trade No: 19 Q. GNLF Ans. Gorkha National Liberation Front No: ...

PROBLEM SOLVING AND PYTHON PROGRAMMING QUIZ

1) What is the first step in problem-solving? A) Writing code B) Debugging C) Understanding the problem D) Optimizing the solution Answer: C 2) Which of these is not a step in the problem-solving process? A) Algorithm development B) Problem analysis C) Random guessing D) Testing and debugging Answer: C 3) What is an algorithm? A) A high-level programming language B) A step-by-step procedure to solve a problem C) A flowchart D) A data structure Answer: B 4) Which of these is the simplest data structure for representing a sequence of elements? A) Dictionary B) List C) Set D) Tuple Answer: B 5) What does a flowchart represent? A) Errors in a program B) A graphical representation of an algorithm C) The final solution to a problem D) A set of Python modules Answer: B 6) What is pseudocode? A) Code written in Python B) Fake code written for fun C) An informal high-level description of an algorithm D) A tool for testing code Answer: C 7) Which of the following tools is NOT commonly used in pr...

ELECTROMAGNETIC WAVES

Understanding Electromagnetic Waves: The Invisible Messengers of Energy Electromagnetic (EM) waves are everywhere around us, shaping the way we live and communicate, though most of the time we are unaware of their presence. From the light we see to the signals carrying our favorite songs on the radio, EM waves play a fundamental role in both nature and modern technology. In this post, we’ll explore the nature of electromagnetic waves, their types, and their significance in daily life. What Are Electromagnetic Waves? At their core, electromagnetic waves are fluctuations of electric and magnetic fields that travel through space. Unlike sound waves, which need a medium like air or water to propagate, electromagnetic waves can travel through a vacuum. This means they can traverse the vast emptiness of space, which is how sunlight reaches Earth from the Sun. The discovery of electromagnetic waves is credited to James Clerk Maxwell in the 19th century. He formulated a set of equations—now kn...