Tag: accountancy

A good requirement specification should be Unambiguous

Testable (Verifiable) Testers should be able to verify whether the requirement is implemented correctly. The test should either pass or fail. To be testable, requirements should be clear, precise, and unambiguous.

The genetic code is unambiguous: each codon specifies one amino acid only. The code is degenerate. One amino acid may be specified by more than one codon. For instance serine is encoded by six codons, glycine by four and lysine by two.

Synonyms of unambiguous. clear-cut, definite, definitive, explicit, express, specific, unequivocal, univocal. Words Related to unambiguous. avowed, declared, specified, stated. categorical (also categoric), complete, comprehensive, exhaustive, full.

Thesoftware requirements specification lays out functional and non-functional requirements, and it may include a set of use cases that describe user interactions that the software must provide. SRS stands for "Software Requirements Specification."

An example of digital communication is DDT.

DDT was the first modern pesticide and is arguably the most well known organic pesticide. Overall, it is known that DDT concentrates in biological systems (particularly in body fat), that it is a toxin, and that it bioaccumulates up the food chain, reaching its greatest concentrations in higher animals such as humans.

DDT was a commonly-used pesticide for insect control in the United States until it was canceled in 1972 by the United States Environmental Protection Agency (EPA). DDT was initially used by the military in WW II to control malaria, typhus, body lice, and bubonic plague (1).

DDT (dichlorodiphenyltrichloroethane) was outlawed in Britain in 1986 and banned as a pesticide worldwide under the Stockholm Convention in 2001 after it was discovered to be dangerous to wildlife and the environment.

Analog signals can be Carried by combining them with a carrier frequency.

Frequency Division Multiplexing (FDM) is a networking technique in which multiple data signals are combined for simultaneous transmission via a shared communication medium. FDM uses a carrier signal at a discrete frequency for each data stream and then combines many modulated signals.

This set of Computer Networks Multiple Choice Questions & Answers (MCQs) focuses on “Multiplexing”. Explanation: FDM and WDM are used in analog signals. Explanation: Each slot is dedicated to one of the source. Explanation: Transmission rate= frame rate * number os bits in a slot.

An analog signal is a continuous signal that contains time-varying quantities. Unlike a digital signal, which has a discrete value at each sampling point, an analog signal has constant fluctuations.

Human voice is an example of Analog signal.

An analog signal is any continuous signal for which the time-varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal.

Digital signals must have a finite set of possible values. ... That's the big difference between analog and digital waves. Analog waves are smooth and continuous, digital waves are stepping, square, and discrete.

So, in other words, if you're using a 56Kbps modem to access your Internet service provider (ISP), you have an analog connection from your home to the local exchange. But the ISP has a digital subscriber line (DSL) or a digital termination facility from its location to its exchange.

A signal is any kind of detectable quantity used to communicate information. An analog signal is a signal that can be continuously, or infinitely, varied to represent any small amount of change. Pneumatic, or air pressure, signals used to be used predominately in industrial instrumentation signal systems.

A device that can convert digital signals to analog signals is Modem

An analog-to-digital converter, or ADC as it is more commonly called, is a device that converts analog signals into digital signals. Analog information is transmitted by modulating a continuous transmission signal by amplifying a signal's strength or varying its frequency to add or take away data.

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. A modem converts between these two forms.

In general terms a data converter is a device that converts analog signals to digital data or vice versa. Devices that convert analog signals to digital are frequently referred to as ADC. Devices that convert digital signals to analog are called DAC.

Analog to Digital Converter samples the analog signal on each falling or rising edge of sample clock. In each cycle, the ADC gets of the analog signal, measures and converts it into a digital value. The ADC converts the output data into a series of digital values by approximates the signal with fixed precision.

After being denied Cray supercomputers, India started a program to develop indigenous supercomputers and supercomputing technologies.

The first super Computer in India was Param 8000 . It was an Initiative program of Center for Development of Advanced Computing(C-DAC) in India which was started in 1980’s.

In 1991 Param 8000 became the first super computer of India.

Smaller and less expensive PC-based servers are replacing Mainframe in many businesses.

Mainframe computers (colloquially referred to as "big iron"[1]) are computers used primarily by large organizations for critical applications; bulk data processing, such as census, industry and consumer statistics, enterprise resource planning; and transaction processing. They are larger and have more processing power than some other classes of computers: minicomputers, servers, workstations, and personal computers.

Modern mainframes can run multiple different instances of operating systems at the same time. This technique of virtual machines allows applications to run as if they were on physically distinct computers. In this role, a single mainframe can replace higher-functioning hardware services available to conventional servers. While mainframes pioneered this capability, virtualization is now available on most families of computer systems, though not always to the same degree or level of sophistication.

Mainframes are designed to handle very high volume input and output (I/O) and emphasize throughput computing.

Supercomputers are specially designed computers that perform complex calculations extremely rapidly.

A supercomputer is a computer with a high level of performance compared to a general-purpose computer. Performance of a supercomputer is measured in floating-point operations per second (FLOPS) instead of million instructions per second (MIPS). As of 2017, there are supercomputers which can perform up to nearly a hundred quadrillion FLOPS. As of November 2017, all of the world's fastest 500 supercomputers run Linux-based operating systems. Additional research is being conducted in China, the United States, the European Union, Taiwan and Japan to build even faster, more powerful and more technologically superior exascale supercomputers.

The IBM Blue Gene supercomputer uses the CNK operating system on the compute nodes, but uses a modified Linux-based kernel called I/O Node Kernel (INK) on the I/O nodes. CNK is a lightweight kernel that runs on each node and supports a single application running for a single user on that node.

A network operating system (NOS) is a computer operating system that is designed for network use. ... In particular, UNIX was designed from the beginning to support networking, and all of its descendants (i.e., Unix-like operating systems) including Linux and Mac OSX, feature built-in networking support.

IBM 7000 digital computer Has modular construction.

The IBM 7000 series is a series of large-scale (mainframe) computer systems that were made by IBM through the 1950s and early 1960s. The series includes several different, incompatible processor architectures. The 700s use vacuum tube logic and were made obsolete by the introduction of the transistorized 7000s. The 7000s, in turn, were eventually replaced by System/360, which was announced in 1964. However the 360/65, the first 360 powerful enough to replace 7000s, did not become available until November 1965. Early problems with OS/360 and the high cost of converting software kept many 7000s in service for years afterward.

Modular design, or "modularity in design", is a design approach that subdivides a system into smaller parts called modules or skids, that can be independently created and then used in different systems. A modular system can be characterized by functional partitioning into discrete scalable, reusable modules; rigorous use of well-defined modular interfaces; and making use of industry standards for interfaces.