IT &computer MCQ section 1 MCQ Questions & Answers Detailed Explanation

Answer: (a)

The UNIVAC I (Universal Automatic Computer I) was the first commercial computer produced in the United States. It was designed principally by J. Presper Eckert and John Mauchly, the inventors of the ENIAC.

It was the first computer designed for business and administrative use with fast execution of relatively simple arithmetic and data transport operations, as opposed to the complex numerical calculations required of scientific computers.

Answer: (b)

The 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.

Answer: (a)

A firewall is a computer appliance or router that sits between the trusted and untrusted systems. It enables a computer to be connected safely to an untrustworthy network.

It is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules.

Answer: (a)

The short-term scheduler is also known as the CPU scheduler. Its main objective is to increase system performance in accordance with the chosen set of criteria.

It decides which of the ready, in-memory processes is to be executed after a clock interrupt, an I/O interrupt, an operating system call or another form of signal.

Thus, the short-term scheduler makes scheduling decisions much more frequently than the long-term or mid-term schedulers.

Answer: (a)

A moderator is a medium that reduces the speed of fast neutrons, thereby turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving uranium-235.

Commonly used moderators include regular (light) water (roughly 75% of the world's reactors), solid graphite (20% of reactors) and heavy water (5% of reactors).

Answer: (a)

Wetware is a term drawn from the computer-related idea of hardware or software but applied to biological life forms. Here the prefix “wet” is a reference to the water found in living creatures.

Wetware is used to describe the elements equivalent to hardware and software found in a person, namely the central nervous system (CNS) and the human brain.