IT &computer MCQ section 2 MCQ Questions & Answers Detailed Explanation

Answer: (a)

DOS ("Disk Operating System) is an acronym for several closely related operating systems that dominated the IBM PC compatible market between 1981 and 1995, or until about 2000 including the partially DOS-based Microsoft Windows versions 95, 98, and Millennium Edition.

Answer: (a)

A supercomputer is used for processing information on quantum mechanics, large scale weather forecasting, molecular studies, polymer research, to solve mathematical problems, wind tunnel research, and chemical composition.

Meteorologists use them to do research on the climate and global warming. It was first created in 1960.

Answer: (a)

A byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits.

Historically, a byte was the number of bits used to encode a single character of text in a computer and for this reason, it is the basic addressable element in many computer architectures.

Answer: (b)

The weighted codes are those that obey the position weighting principle, which states that the position of each number represents a specific weight. In weighted codes, each digit is assigned a specific weight according to its position.

Non-weighted or un-weighted codes are those codes in which the digit value does not depend upon their position i.e., each digit position within the number is not assigned a fixed value.

Examples of non-weighted codes are: Un-weighted BCD code, Excess-3 code and grey code.

Answer: (a)

A general-purpose database management system (DBMS) is a software system designed to allow the definition, creation, querying, update, and administration of databases.

Well-known DBMSs include MySQL, Microsoft SQL Server, Oracle, SAP, etc. PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation’s procedural language extension for SQL and the Oracle relational database.

Answer: (d)

The introductory web page of an organisation is called website. A website (also called an Internet site) is a group of HTML files connected by hypertext links and stored on a web server, i.e. a computer that hosts webpages and is permanently connected to the Internet.