Operations Research came into being due to: medical reasons military reasons edu

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military reasons

4. Which one of the following is a direct statement of Ohm's law?
Options
A. The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
B. The total resistance of a parallel circuit is less than the value of the smallest resistance
C. The algebraic sum of voltages in a loop is equal to zero
D. The algebraic sum of currents entering and leaving a point is equal to zero
E. None of the above

5. To avoid errors in transcription and transposition, during data entry, the System Analyst should
Options
A. provide for a check digit
B. provide for a hash totals
C. provide batch totals
D. All of the above

7. Which of the following is not true of the traditional approach to information processing?
Options
A. There is common sharing of data among the various applications
B. It is file-oriented
C. Programs are dependent on the files
D. It is inflexible
E. All of the above are true

8. Parity bit is
Options
A. an error-detecting code based on a summation operation performed on the bits to be checked.
B. a check bit appended to an array of binary digits to make the sum of all the binary digits.
C. a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and thus the presence of the errors in detected
D. the ratio of the number of data units in error to the total number of data units
E. None of the above

9. 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
Options
A. An additional token is added for every 1,000 nodes
B. The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500
C. The network becomes less efficient
D. After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful Hyperstation Unified Bandwidth device
E. The network becomes more efficient

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