Computer Awareness Previous Year Questions (PYQ) with Answers – Page 7

In the 8085A microprocessor the program counter is a 16-bit register that always holds the memory address of the next instruction, or op-code, to be fetched.

Integrated circuits are classified by how many logic gates are packed on a single chip.

In an operating system a process passes through the states new, ready, running, waiting and terminated.

The system development life cycle, or SDLC, is the set of stages followed while building a software system, and feasibility study, coding and implementation are all stages of it.

Cache memory is the small, very fast memory placed between the processor and main memory that keeps the data the processor is most likely to need next.

EBCDIC is an 8-bit character encoding scheme developed by IBM in 1963 for its mainframe and midrange computers. Because it uses 8 bits for each character it can represent 256 different characters, twice as many as the 7-bit ASCII code, which handles 128.

Data can travel between two devices in three modes. In half-duplex mode both devices can send and receive, but only one of them may transmit at any given moment, so the traffic takes turns; a walkie-talkie is the standard example, and older hubs and CB radio worked the same way.

In an entity relationship diagram each symbol has a fixed meaning, and an attribute that can hold more than one value for the same entity, such as a person's several phone numbers, is drawn as a double ellipse.

The 56 K rating of a modem means it can transfer data at up to 56 kilobits per second, so the figure describes speed, not size.

In a packet switched network a packet meets four kinds of delay at every router on its path, and transmission, processing and queuing delays are three of them.

The ones complement of a binary number is found by simply inverting every bit, turning each 0 into 1 and each 1 into 0.

Computer storage is counted in powers of two, so each step up the ladder multiplies by 1024, and one gigabyte equals 1024 megabytes.

The safest way to handle a binary subtraction in an examination is to convert both numbers to decimal, subtract, and convert the answer back.

Hexadecimal has base 16, and because 2 raised to the power 4 equals 16, exactly four binary bits make one hexadecimal digit.

A modulator changes the form of a signal: it loads the digital bits produced by a computer onto an analog carrier wave so that they can travel over a telephone line, a cable or a radio link.

Cloud computing is sold in three service models, and PaaS is the middle one.

A high-level language is written in words close to English and has to be turned into machine code by a compiler or an interpreter, so the programmer need not know the processor at all.

The To field of a mail window is meant for the addresses of the people the letter is written to.

Statement (i) is wrong because Ctrl + N opens a brand new, empty presentation; the key that inserts a new slide into the open presentation is Ctrl + M. Statement (ii) is true: PowerPoint 2016 can save or export a presentation as a PDF through Save As or Export, a…

Pressing F5 anywhere in a presentation closes the editing window and runs the slide show from slide one, whichever slide you were working on.