IT &computer MCQ section 4 MCQ Questions & Answers Detailed Explanation

Answer: (b)

An attribute that uniquely identifies the rows of a table is known as the primary key.

Answer: (d)

Processor chip, Printer and Mouse are hardware while JAVA is software.

Java is a programming language originally developed by James Gosling at Sun Microsystems (which has since merged into Oracle Corporation) and released in 1995 as a core component of Sun Microsystems’ Java platform.

The language derives much of its syntax from C and C++, but it has fewer low-level facilities than either of them.

Answer: (b)

Pseudocode is an informal high-level description of the operating principle of a computer program or other algorithm. It uses the structural conventions of a programming language, but is intended for human reading rather than machine reading.

Answer: (a)

Passwords are often used to protect objects in the computer system, in the absence of more complete protection schemes. They can be considered a special case of either keys or capabilities. Passwords are the most common approach to authenticating a user identity.

Answer: (a)

Read-only memory (ROM) is a class of storage medium used in computers and other electronic devices. It is programmed during manufacturing process.

Answer: (c)

The World Wide Web (abbreviated as WWW or W3, commonly known as the Web), is a system of interlinked hypertext documents accessed via the Internet.

Using concepts from his earlier hypertext systems like ENQUIRE, British engineer, computer scientist and at that time employee of CERN, Sir Tim Berners-Lee, now Director of the World Wide Web Consortium (W3C), wrote a proposal in March 1989 for what would eventually become the World Wide Web.