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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...

Main method in Java

What is main method in Java?
          Main method in Java is an standard method which is used by JVM to start execution of any java program. Main method is referred as entry point of any standalone java application.
          Main method in Java is public so that it's visible to every other class, even which are not part of it's package. If it is not public, JVM class might not able to access it.
          Main method is static so that java runtime can access it without initializing the class. While JVM tried to execute java program, it doesn't know how to create instance of main class as there is no standard constructor is defined for main class.
          Main method is void in Java because it doesn't return anything to caller which is JVM.

Signature of main method:
          main method is public, static and void and accept an array of String as argument through which we can pass runtime arguments to the java program. From java5 onwards it can also accept variable arguments instead of array. Following signature are valid main method signature in java :
public static void main(String args[]) {}
public static void main (String [] args) {}
public static void main (String.... args) {}
          You can also use certain modifier like final, synchronized and strictfp along with main method in java.
          If you change the signature of main method, JVM will not able to locate main method and will throw exception at runtime as:
'java.lang.NoSuchMethodError:main'
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