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A line encoding method wherein the positive half interval pulse is followed by a negative half interval pulse for transmission of ‘1’ is

A line encoding method wherein the positive half interval pulse is followed by a negative half interval pulse for transmission of ‘1’ is

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Choose the right answer:

1- A line encoding method wherein the positive half interval pulse is followed by a negative half interval pulse for transmission of ‘1’ is

a.
Bipolar NRZ


b.
NRZ-M


c.
bi-phase-level


d.
RZ-AMI

 

2- In block coding, the number of valid codewords is equal to

a.
2^n + 2^k

b.
2^n

c.
2^k

d.
2^n - 2^k

3- Which statement is correct for a simple parity-check code?


a.
can detect an odd-number of errors.


b.
can detect two errors.


c.
can detect no errors


d.
can detect an even-number of errors.

 

4- In modulo-2 arithmetic, adding 1 and 1 will have an outcome of

a.
0

b.
2

c.
1

d.
11

5- The remainder in cyclic redundancy checking represents the

a.
The CRC

b.
The error

c.
The divisor

d.
The syndrome

 

 

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