Online Computer Science Test - Computer Science Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
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What is the minimum number of wires required for sending data over a serial communications links?

None of the above

[#]

The Token-Ring architecture was developed for a more efficient way to determine who should be transmitting at any one time. With Ethernet, collisions may take place, causing the transmitting computers to have to retransmit their data. The use of token guarantees that only one computer can transmit at a time. What happens as the network increases in size? Choose the best answer

An additional token is added for every 1,000 nodes

The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500

The network becomes less efficient

After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful Hyperstation Unified Bandwidth device

The network becomes more efficient

[#]

A program

is a device that performs a sequence of operations specified by instructions in memory.

is the device where information is stored

is a sequence of instructions

is typically characterized by interactive processing and time of the CPU's time to allow quick response to each user.

None of the above

[#]

You are the administrator of a Windows 2000 Server computer that has FIVE hard disks. Four 100 GB hard disks on the server are configured as a single stripe volume. You want to reconfigure the fourth disk so that the volume is fault tolerant and has as much space possible available for storing data. You want to use only existing hardware. What should you do?

Convert the disk to dynamic disk shut doWn and restart the server

Backup the data on the stripe volume and delete the stripe volume. Create a raidS volume on the four disks, restore the data to the new raid5 volume

Backup the data on the stripe volume and delete the stripe volume. Create a mirror volume, shut down and restart the server. Restore the data to new mirror volumes

Backup the data on the stripe volume and delete the stripe

None of above

[#]

To have a file hold a list, it is necessary to

identify the records in the list

identify the name, width and type of the fields of each record.

decide which fields will be used as sort or index keys

All of the above

None of the above

[#]

IRQ6 is typically reserved for:

The floppy

The keyboard controller

LPT2

The modem

None of the above

[#]

A hard disk is divided into tracks which are further subdivided into:

clusters

sectors

vectors

heads

None of the above

[#]

What command is used to hang up a MODEM when using the "AT Command set"?

ATZ

ATD

ATR

ATH

None of the above

[#]

When an input electrical signal A=10100 is applied to a NOT gate, its output signal is

01011

10001

10101

00101

None of the above

[#]

10.

The magnetic storage chips used to provide nonvolatile direct access storage of data and that have no moving parts are known as

Magnetic core memory

Magnetic tape memory

Magnetic disk memory

Magnetic bubble memory

None of the above

[#]

11.

How many ALU(s) is/are control by one control unit is SIMD (single instruction stream, multiple data stream) architecture?

one or more ALUs

One ALU

Only two ALU .

Impossible to say

None of the above

[#]

12.

Marketing planning is concerned with

planning the amount and placement of newspaper ads

planning consignment sales contracts to be offered

planning sales force size and deployment

All of the above

None of the above

[#]

13.

A Decision table

represents the information flow

documents rules, that select one or more actions, based on one or more conditions, from a set of possible conditions.

gets an accurate picture of the system

shows the decision paths

[#]

14.

Which of the following way(s) the information system and capability are related to each other:

improved processing speed

increased volume of activities

faster retrieval of information

All of the above

None of the above

[#]

15.

Which of the following method is used the results of a design analysis as a base for redesign decisions?

The iterative design method

The direct method

The design selection method

All of the above

None of the above

[#]

16.

Which of the following devices would be classified as a robot by the Robot Institute of America?

Automobile

Pick-and-place manipulator

Artificial hand

All of the above

None of the above

[#]

17.

Conversion of an octal number 143₈ to hexadecimal number is

63₁₆

60₁₆

50₁₆

57₁₆

None of the above

[#]

18.

A flashlight battery has internal resistance of 1W. For what values of load resistance does the flashlight battery appear stiff?

60 Ohm

50 Ohm

100 Ohm or more

10 Ohm

None of the above

[#]

19.

If you want only one memory location to be reserved for a class variable, no matter how many objects are instantiated, you should declare the variable as

static

unary

dynamic

volatile

[#]

20.

The 'break' statement is used to exist from

a do loop

a for loop

a switch statement

All of the above

None of the above

[#]

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