Tag: physics

Questions Related to physics

Avalanche effect in encryption is  ____________.

classification of computer introduction to the information age physics

  1. Desirable

  2. Undesirable

  3. Cannot be said

  4. Depends upon the context

Show answer
Correct Option: A
Explanation:

Avalanche effect in encryption is Desirable.

Avalanche effect. ... In cryptography, the avalanche effect is the desirable property of cryptographic algorithms, typically block ciphers and cryptographic hash functions, wherein if an input is changed slightly (for example, flipping a single bit), the output changes significantly (e.g., half the output bits flip).

Avalanche effect, in physics, a sudden increase in the flow of an electrical current through a nonconducting or semiconducting solid when a sufficiently strong electrical force is applied.

Signal becomes weak with increase in distance travelled because of. 

classification of computer introduction to the information age physics

  1. Modulation

  2. Attenuation

  3. Switching

  4. None of the above

Show answer
Correct Option: B
Explanation:

Signal becomes weak with increase in distance travelled because of Attenuation.

Consequently, positive attenuation causes signals to become weaker when travelling through the medium. ... Causes of attenuation in both signal frequency and range between the end points of the medium, affect the amount of signal reduction. As the range increases, attenuation also increases.

In a nutshell, attenuation is the loss of transmission signal strength measured in decibels (dB). As attenuation increases, the more distorted and unintelligible the transmission (e.g. a phone call or email you're trying to send) becomes. Inherent attenuation can be caused by a number of signaling issues including:

Transmission medium - All electrical signals transmitted down electrical conductors cause an electromagnetic field around the transmission. ... Crosstalk from adjacent cabling causes attenuation in copper or other conductive metal cabling.

Attenuation is a general term that refers to any reduction in the strength of a signal. ... Sometimes called loss, attenuation is a natural consequence of signal transmission over long distances. The extent of attenuation is usually expressed in units called decibels (dBs).

We combine hardware, software, human resource, steps, procedures and data to create an ________.

classification of computer introduction to the information age physics

  1. Information system

  2. Institution

  3. Organisation

  4. Online service

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Correct Option: A

The tracks on a disk which can be accessed without repositioning of read write head is ___________.

classification of computer introduction to the information age physics

  1. Surface

  2. Cylinder

  3. Cluster

  4. All of the above

Show answer
Correct Option: B
Explanation:

The tracks on a disk which can be accessed without repositioning of read write head is Cylinder.

are vertically formed by tracks. In other words, track 12 on platter 0 plus track 12 on platter 1 etc. is cylinder 12. The number of cylinders of a disk drive exactly equals the number of tracks on a single surface in the drive.

So, in order to access a particular cylinder from a track we do not need to move read write head from that particular track. | | --- |

___________ servers store and manages files for network users.

classification of computer introduction to the information age physics

  1. Authentication

  2. Main

  3. Web

  4. File

  5. None of these

Show answer
Correct Option: D
Explanation:

File servers store and manages files for network users.

Certainly factor is defined as __________________.

classification of computer introduction to the information age physics

  1. Major of belief-major of disbelief

  2. Major of disbelief-major of belief

  3. Major of evidence-major of belief

  4. Major of belief=major of evidence

Show answer
Correct Option: A

In a network, the computer that stores the files and process the data is named as ____________.

classification of computer introduction to the information age physics

  1. Server

  2. Terminal

  3. Modem

  4. All of the above

Show answer
Correct Option: A
Explanation:

The function of a computer server is to store, retrieve and send computer files and data to other computers on a network.

For example, a user may set up a server to control access to a network, send/receive e-mail, manage print jobs, or host a website. 
Some server types- Web Server, Mail Server, etc.

In the multiprogramming system, a set of processes is deadlock if each process in the set is waiting for an event to occur that can be initialized only by another process in the set. Which of the following is not one of the four conditions that are necessary for deadlock to occur?

classification of computer introduction to the information age physics

  1. nonpreemption

  2. process suspension

  3. partial assignment of resources

  4. circular wait

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Correct Option: B

Multiprocessor is a computer system _________________.

classification of computer introduction to the information age physics

  1. Where many CPU under a common control

  2. Consisting of more than one input devices under common control

  3. Where many output devices under common control

  4. All of the above

  5. None of these

Show answer
Correct Option: A
Explanation:

Multiprocessor is a computer system Where many CPU under a common control.

Multiprocessing is the use of two or more central processing units (CPUs) within a single computer system. The term also refers to the ability of a system to support more than one processor or the ability to allocate tasks between them. There are many variations on this basic theme, and the definition of multiprocessing can vary with context, mostly as a function of how CPUs are defined (multiple cores on one die, multiple dies in one package, multiple packages in one system unit, etc.).

According to some on-line dictionaries, a multiprocessor is a computer system having two or more processing units (multiple processors) each sharing main memory and peripherals, in order to simultaneously process programs.[3][4] A 2009 textbook defined multiprocessor system similarly, but noting that the processors may share "some or all of the system’s memory and I/O facilities"; it also gave tightly coupled system as a synonymous term.

multiprocessor is a computer system with two or more central processing units (CPUs), with each one sharing the common main memory as well as the peripherals. This helps in simultaneous processing of programs.The key objective of using a multiprocessor is to boost the system’s execution speed, with other objectives being fault tolerance and application matching.

Apple Macintoshes(Macs) and PCs use different __________ to process data and different operating systems.

classification of computer introduction to the information age physics

  1. Languages

  2. Methods

  3. CPUs

  4. Storage devices

Show answer
Correct Option: C
Explanation:

Apple Macintoshes(Macs) and PCs use different CPUs to process data and different operating systems

Macintosh and Windows are two different computer systems, and they run on different operating systems. A Mac computer runs on a Unix-based operating system that is designed and sold by Apple. The operating system being used currently for Macs is Mac OS X, and it is designed around graphic interface. The Windows-based computers operate on different operating systems which are made by Microsoft, and some of these are: Windows XP, Windows Vista and Windows 7. These Windows-based operating systems can be used on a variety of PCs which are widely used.

Macintosh and Windows are two different computer systems, and they run on different operating systems. A Mac computer runs on a Unix-based operating system that is designed and sold by Apple. The operating system being used currently for Macs is Mac OS X, and it is designed around graphic interface.