1. What is the purpose of garbage collection in Java, and when is it used ? The purpose of garbage collection is to identify and discard those objects that are no longer needed by the application, in order for the resources to be reclaimed and reused. 2. What does System.gc() and Runtime.gc() methods do ?
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1. What is JVM ? Why is Java called the Platform Independent Programming Language? A Java virtual machine (JVM) is a process virtual machine that can execute Java bytecode. Each Java source file is compiled into a bytecode file, which is executed by the JVM. Java was designed to allow application programs to be built
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Main root <html> … </html> The HTML <html> element represents the root (top-level element) of an HTML document, so it is also referred to as the root element. All other elements must be descendants of this element. Example: <!DOCTYPE html> <html lang=”en”> <head>…</head> <body>…</body> </html> Document metadata <head> … </head> The HTML <head> element contains
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1. What is SQL? SQL stands for Structured Query Language. It is a programming language used for managing and manipulating relational database. 2. What is database? A database is an organized collection of data stored and accessed electronically. It provides a way to store, organize, and retrieve large amounts of data efficiently. 3. What is
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Which one of the following is the difference of the sum of cubes of first ten natural numbers and the sum of squares of first ten natural numbers? Answer: 2640 A person buys an item from a shop for which the shopkeeper offers a discount of 10% on the marked price. The person pays
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1. What is a dielectric material? State their property. Dielectrics are the insulating materials having electric dipole moment permanently or temporarily by applying the electric field. These are mainly used to store electrical energy and used as electrical insulators. All dielectrics are electrical insulators. But all electrical insulators need not to be dielectrics. Dielectrics are
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1. What is data science? Data science is like a detective story for numbers. It’s all about collecting, analyzing, and interpreting data to uncover hidden patterns and gain insights. Imagine you have a massive puzzle of information, and data scientists are the detectives putting the pieces together to reveal the bigger picture. They use a
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1. What is meant by magnetic materials? Give examples? Magnetic materials are the materials which can be easily magnetized by keeping it in an external magnetic field. Examples: Iron, Ferrites, Carbon steel etc. 2. Define Magnetic Flux [φ] The total number of magnetic lines of force passing through a surface is known as magnetic flux.
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1. What is a semiconductor? The materials in which the electrical conductivity lies between conductors and insulators are called semiconductors. They have resistivity value between 10-4 to 0.05 ohm-m. The electrical conductivity of semiconductor increase when we add impurities and by increasing the temperature and it is contrary to the metals. 2. Define the properties
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1. What is a conducting material? The material possessing higher electrical and thermal conductivities are called conducting materials. The resistance of such materials are very low. The conducting property of a material depends on the number of free electrons. 2. What is meant by a free electron? The electron moves freely in all directions in
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