In this and the following question, consider those TMs that satisfy all of the following properties:Q={90,91,9a9r}: there are exactly two states besides the accept state and the reject state.• Σ={1}: the input alphabet has just one symbol.• [={1,_}: the tape alphabet has two symbols, where is the blank symbol.• The head is moved in every step, that is, 8 uses only L and R, but not N.• If the machine is started on the completely empty tape, it will halt after a finite number of steps, that is, it will reach qa or qr.If such a TM is started on the completely empty tape, it will leave a certain number of 1 symbols on the tape after it halts. What is the maximum number of 1 symbols on the tape, among all of these TMs?Answer:CheckConsider again the TMs of the preceding question. If such a TM is started on the completely empty tape, it will make a certain number of transition steps. What is the maximum number of steps, among all those TMs?Answer:Check

this and the following question, consider those TMs that satisfy all of the following properties: • Q=199₁-99): there are exactly two states besides the accept state and the reject state. • I=(1): the input alphabet has just one symbol. •[=(1,]: the tape alphabet has two symbols, where is the blank symbol. • The head is moved in every step, that is, & uses only L and R, but not N. • If the machine is started on the completely empty tape, it will halt after a finite number of steps, that is, it will reach q, or q If such a TM is started on the completely empty tape, it will leave a certain number of 1 symbols on the tape after it halts. What is the maximum number of 1 symbols on the tape, among all of these TMs? Answer: Check

this and the following question, consider those TMs that satisfy all of the following properties: • Q=199₁-99): there are exactly two states besides the accept state and the reject state. • I=(1): the input alphabet has just one symbol. •[=(1,]: the tape alphabet has two symbols, where is the blank symbol. • The head is moved in every step, that is, & uses only L and R, but not N. • If the machine is started on the completely empty tape, it will halt after a finite number of steps, that is, it will reach q, or q If such a TM is started on the completely empty tape, it will leave a certain number of 1 symbols on the tape after it halts. What is the maximum number of 1 symbols on the tape, among all of these TMs? Answer: Check

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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