Computer fundamental MCQ Questions and answers- Technical Aptitude

In this world of fast changing computer technology, one of the most important factor to be considered while purchasing a PC is, it should have a provision for self upgradability. It saves time, efforts and money compared with letters used, before making influence of computers in human life.

Byte : The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable unit of memory in many computer architectures.

The ALU of a central processing unit does the essential maths work for the computer in monitors the flow of information. The control unit tells the ALU what operation to perform on that data, and the ALU stores the result in an output register. The control unit moves the data between these registers, the ALU, and memory.

The storage and retrieval methods would be well suited to your processing requirements if you only need to retrieve records one at a time and there is no fixed pattern to the requests for data and records an indexed direct. The systematic process of collecting and cataloging data so that they can be located and displayed on request.

A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves.

Source : webopedia.com

Floppy Disk : A floppy disk, also known as a floppy, diskette, or simply disk, is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles. Floppy disks are read and written by a floppy disk drive (FDD).

Source : wikipedia.org

The term backing storage refers to any non-volatile data storage that will retain a computer's data even after the computer is powered off. Common types of backing storage devices are hard drives, SSD, external hard disk drives, optical media such as CD or DVD, and flash media such as thumb drives and memory sticks.

Application software, or app for short, is software that performs specific tasks for an end-user. In a PC, 640 KB memory is available to application software.

Cycle time is the time, usually measured in nanosecond s, between the start of one random access memory (RAM) access to the time when the next access can be started. For a memory system, the cycle time is longer than the access time .

The number of records contained within a block of data on magnetic tape is defined by the Blocking factor.