IT &computer MCQ section 4 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (c)

A flip-flop is a circuit that has two stable states and can be used to store state information. The circuit can be made to change state by signals applied to one or more control inputs and will have one or two outputs.

It is the basic storage element in sequential logic. Flip-flops and latches are a fundamental building block of digital electronics systems used in computers, communications, and many other types of systems.

Answer: (a)

An arithmetic-logic unit (ALU) is the part of a computer processor (CPU) that carries out arithmetic and logic operations on the operands in computer instruction words. It performs all arithmetic computations, such as addition and multiplication, and all comparison operations.

Answer: (c)

A web browser is a software application for accessing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URL). The major web browsers are Firefox, Internet Explorer, Google Chrome, Opera, etc.

Answer: (d)

Electronic waste or E-waste is the collective term for discarded electrical or electronic devices such as computers, mobile phones, etc that enter the waste stream from various sources.

E-waste contains a significant concentration of substances that are highly toxic and are hazardous to human health and the environment.

Answer: (c)

The overall design or description of the database is known as database schema or intension of the database and is specified while designing the database.

The data in the database at a particular point of time is known as database instance of database state or snapshot. The database state is also called an extension of the schema.