IT &computer MCQ section 3 MCQ Questions & Answers Detailed Explanation

Answer: (c)

The third-lowest layer of the OSI Reference Model is the network layer. It is responsible for packet forwarding including routing through intermediate routers. Routers forward data packets between computer networks.

A data packet is forwarded from one router to another through the networks that constitute the internetwork until it reaches its destination node.

Answer: (b)

The control unit maintains order within the computer system and directs the flow of traffic(operations) and data.

The arithmetic-logic unit (ALU) performs all arithmetic operations (addition, subtraction, multiplication, and division) and logic operations. These two have special-purpose storage called Registers.

Answer: (a)

The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is known as piggybacking.

The principal advantage of using piggybacking over having distinct acknowledgement frames is a better use of the available channel bandwidth.

Answer: (d)

An address consists of an offset, a base register and an index register.

Answer: (a)

The ‘AND’ gate in computers has basic application of multiplication. It has two or more inputs and one output. An ‘AND’ gate produces an output of 1 if all the inputs are 1 if any of the inputs is zero then it produces an output of zero.

Answer: (a)

In a Database Management System (DBMS), the content and the location of the data is defined by the Metadata. Metadata is “data about data”.

It assists in resource discovery by allowing resources to be found by relevant criteria, identifying resources, bringing similar resources together, distinguishing dissimilar resources, and giving location information.