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4

Most accurate global time is based on oscillations of the ______________

A. Cesium-130 atom

B. Cesium-133 atom

C. Cesium-136 atom

D. Cesium-139 atom

Correct Answer :

B. Cesium-133 atom


Related Questions

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4

Which one of the following statements is true?

A. The cat command cares which file it receives as input or where the input goes.

B. Relative pathnames begin with something other than the slash character

C. UNIX shells never remember their current working directory (CW.

D. The cat command interprets -X as an option character rather than a pathname.

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4

Transparent RPC mechanism refers to :

A. Existance of multuple computer visible and a provide a single system image to its users.

B. It runs the program transparently.

C. It is a technique to shift the program to other computer.

D. It is technique in which local procedures and remote procedures are indistinguishable to programmers.

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4

One of the wonderful things about UNIX is its ___________names.

A. Unlimited path

B. Unlimited directory

C. Limited path

D. Limited file

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4

A standard UNIX system includes a set of ___________ and a set of ___________.

A. Commands ,files

B. Libraries, Applications

C. Libraries, files

D. Files, Applications

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4

The ______________ unpacks the call receipt messages from local RPC Runtime and makes a perfect local call to invoke the appropriate procedure in the server.

A. server Stub

B. server

C. client

D. client stub

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4

The maximum size of a write file is limited to only

A. Name of the file

B. Extension of the file

C. The amount of memory in your computer

D. All of above

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4

All of the following are TRUE regarding virtual memory EXCEPT

A. Any amount of RAM can be allocated to virtual memory

B. The setting for the amount of hard disk drive space to allocate virtual memory can be manually change

C. This temporary storage is called the swap file or page file

D. Virtual memory is the physical space o the hard drive

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4

A shared memory segment first needs to be allocated (create, using the__________ system call.

A. semget()

B. msgrcv()

C. shmget()

D. mknod()

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4

A page fault occurs when

A. the page is not found in the memory

B. the page is found in the memory

C. the Segmentation starts

D. the Deadlock happens

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4

You can use print manage window

A. To cancel the print job

B. To check status of files in the print queue

C. To interrupt printing

D. All of the above

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4

The early ARPAnet is an example of a distributed computing system based on the ________________.

A. Minicomputer model

B. Workstation model

C. Hybrid model

D. Processor pool model

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4

In case of modification an unauthorized party not only gains access to but tampers with an asset. This is an attack on ____________________.

A. availability

B. confidentiality

C. integrity

D. authenticity

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4

Choose the correct statement from the following.

A. In computer terminology, variables are symbols which stand for some value.

B. An alternative method for executing the commands in the file backup is to make the file as directory.

C. The restricted shell gives more control to the system administrator and restricts the options of the user.

D. The decision making done by computer programs is in the form of conditional execution.

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4

An option commonly takes the form of a _____followed by __________characters.

A. dot, one or more

B. dash, only one

C. dash, one or more

D. dot,only two

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4

____________approach can place the data directly into the memory or take the data directly from the memory without direct intervention from the processor.

A. DMA

B. Daisy chain arbitration

C. polling

D. none of these

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4

____ runs on a computer hardware and serves as a platform for other system to run on

A. System software

B. Operating system

C. Application system

D. All of above

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4

______________is responsible for allocating primary memory to processes and for assisting the programmer in loading and storing the contents of the primary memory.

A. Operating system

B. Memory manager

C. Database administrator

D. RAM

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4

In Windows, start button is used to

A. Device setting

B. Run applications

C. All of above

D. Turn off the system

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4

Which is the layer of a computer system between the hardware and the user program

A. Operating system

B. Operating environment

C. System environment

D. None

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4

A small part of taskbar that has icons of background running applications is

A. Start button

B. Quick launch

C. Task bar

D. System tray

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4

The controller can access memory in memory cycles which are not used by the particular bank of memory into which the DMA controller is writing data. This approach, called _________

A. interrupting

B. cycle stealing

C. swapping

D. paging

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4

A process control block contains varies attributes required by _____________ to control a process.

A. RAM

B. virtual memory

C. BIOS

D. Operating System

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4

Which of the following is an essential file of a MS-DOS boot disk?

A. COMMANCOM

B. START.COM

C. VER.COM

D. TREE.COM

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4

Taskbar is used for

A. Navigation program

B. Start a program

C. Switching between program

D. All of above

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4

Bootstrapping is also known as ______

A. cold-hot boot

B. hot boot

C. hot strap

D. cold boot

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4

______________ refers to the technology in which some space in hard disk is used as an extension of main memory.

A. Cache memory

B. Paging

C. Virtual memory

D. Associative memory

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4

_____________typically contains temporary data such as subroutine parameter, return address, and temporary variables.

A. Current value of Program Counter

B. Value of the variables

C. The process stack

D. A data section

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4

The algorithm should be scalable i.e. _____________.

A. The system should not enter a state in which nodes spend all their time migrating processes or exchanging control messages without doing any useful work.

B. The system should be able to handle small and large networked systems.

C. The algorithm should not be affected by the crash of one or more nodes in the system.

D. The process assignment decisions should be based on the current load of the system and not on some fixed static policy.

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4

A process may create a new process by executing ___________system call.

A. init

B. fork

C. create

D. new

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4

When copying more than one file at a time, you must specify an existing directory as the ___________

A. Source

B. Sub directory

C. Destination.

D. Path name