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Unit 6 String in Java

1. Introduction to String In Java, a String is an object that represents a sequence of characters . Strings are written using double quotation marks (" ") . Example: String s = "Java" ; A character array can also be used to create a String. Example: char [] ch = { 'j' , 'a' , 'v' , 'a' }; String s = new String ( ch ); This is the same as: String s = "java" ;   Java StringBuffer Class The StringBuffer class is used to create mutable (modifiable) string objects . Unlike the String class, StringBuffer objects can be modified after creation . ·          String → Immutable (cannot change) ·          StringBuffer → Mutable (can change) Features of StringBuffer ·          Characters can be inserted, replaced, or deleted ·          Automatically grows when more characters are adde...
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VP Practical Questions

 1. Write a program to find simple interest of any principal amount taking all input from user. 2. Write a program to find the sun of n natural numbers and also find the average of those. 3. Writre  program to display whether the year entered by user is leap year or not. 4. Write a program to find find whether the number entered by user is palindrome or not. 5. Write a program to find the smallest among 3 numbers. 6. Write a program to print the factorial of numbers. 7. Write a program to print multiplication table of any numbers. 8. Write a program to print the fibonacci series upto n numbers. 9.  Develop a Student Result Processing System that takes a student’s name and marks of five subjects, then calculates the total and percentage. If any subject mark is below 40, the student is Fail . Otherwise, assign division based on percentage: 80%+ Distinction, 60–79 First, 50–59 Second, 40–49 Third.  Finally, display total, percentage, division, and Pass/Fail status. 10....
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UNIT–4: DEADLOCK MANAGEMENT (OS)

Introduction to Deadlock A deadlock is a situation in an operating system where a set of processes are permanently blocked because: ·          Each process is holding at least one resource ·          Each process is waiting for another resource held by some other process As a result, none of the processes can continue execution , and the system becomes stuck. Real-Life Example: Two Cars on a Narrow Road Imagine two cars coming from opposite directions on a narrow one-lane road where only one car can pass at a time. They meet in the middle. Now: ·          Car A cannot move forward unless Car B moves back. ·          Car B cannot move forward unless Car A moves back. ·          Neither car is willing or able to move backward. So: ·      ...
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Unit 5 Java Array

  Array in Java Arrays are used to store multiple values in a single variable, instead of declaring separate variables for each value. Java array  is an object which contains elements of a similar data type. Additionally, The elements of an array are stored in a contiguous memory location. It is a data structure where we store similar elements. We can store only a fixed set of elements in a Java array. declaration: An "array declaration" names the array and specifies the type of its elements . Initialisation : Initialisation is when you provide an initial value for a variable. Instantiation : Instantiation is where an object (class instance) is created . Syntax to Declare an Array in Java 1.       dataType[] arr;   2.       dataType []arr;  3.       dataType arr[];                        ...
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