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

Answer: (b)

Unix is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, developed in the 1970s at the Bell Labs. It provides separate logins for each user and separate storage space. Most importantly it supports separate security for users and groups.

Answer: (c)

The Internet protocol suite is the set of communications protocols used for the Internet and similar networks, and generally the most popular protocol stack for wide area networks.

It is commonly known as TCP/IP, because of its most important protocols: Transmission Control Protocol (TCP) and Internet Protocol (IP), which were the first networking protocols defined in this standard.

Answer: (d)

The Data Link layer is the second layer of the seven-layer Open Systems Interconnection (OSI) model of computer networking at which meaning is assigned to the bits that are transmitted over the network. Two types of Data Link layer devices are commonly used on networks: bridges and switches.

A bridge is an intelligent repeater that is aware of the MAC addresses of the nodes on either side of the bridge and can forward packets accordingly.

A switch is an intelligent hub that examines the MAC address of arriving packets in order to determine which port to forward the packet to.

Answer: (a)

Looping is used in programming to save the tedium of many repetitive tasks. One of the main uses of loops in programs is to carry out repetitive tasks. A loop executes one or more lines of code (statements) as many times as one wants.

Answer: (a)

Customer relationship management (CRM) is a model for managing a company’s interactions with current and future customers. It involves using technology to organize, automate, and synchronize sales, marketing, customer service, and technical support.