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

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: (a)

Principal components of a processor (CPU) include the arithmetic logic unit (ALU) that performs arithmetic and logic operations, processor registers that supply operands to the ALU and store the results of ALU operations, and a control unit that fetches instructions from memory and “executes” them by directing the coordinated operations of the ALU, registers and other components.

Answer: (b)

An electric organizer is a small calculator-sized computer, often with an in-built diary application but few other functions such as an address book and calendar. It normally has a small alphanumeric keypad and an LCD screen of one, two or three lines.

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.