Computer Science: A Structured Programming Approach Using C, Third Edition
3rd Edition
ISBN: 9780534491321
Author: Behrouz A. Forouzan, Richard F. Gilberg
Publisher: Course Technology, Inc.
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Textbook Question
Chapter 2, Problem 5PS
Which of the following statements about block comments is false?
a. Comments are internal documentation for programmers.
b. Comments are used by the preprocessor to help format the
c. Comments begin with a /* token.
d. Comments cannot be nested.
e. Comments end with a */ token.
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Students have asked these similar questions
using rapid miner how to creat decison trea for all attribute and another one with delete one or more of them also how i know the weight of each attribute and what that mean in impact the result
Q.1. Architecture performance [10 marks]
Answer
A certain microprocessor requires either 2, 4, or 6 machine cycles to perform various operations.
⚫ (40+g+f)% require 2 machine cycles,
⚫ (30-g) % require 4 machine cycles, and
⚫ (30-f)% require 6 machine cycles.
(a) What is the average number of machine cycles per instruction for this microprocessor?
Answer
(b) What is the clock rate (machine cycles per second) required for this microprocessor to be a
"1000 MIPS" processor?
Answer
(c) Suppose that 35% of the instructions require retrieving an operand from memory which
needs an extra 8 machine cycles. What is the average number of machine cycles per
instruction, including the instructions that fetch operands from memory?
Q.2. Architecture performance [25 marks]
Consider two different implementations, M1 and M2, of the same instruction set. M1 has a clock
rate of 2 GHz and M2 has a clock rate of 3.3 GHz. There are two classes of instructions with the
following CPIs:
Class
A
CPI for M1
CPI for M2
2.f
1.g
B
5
3
C
6
4
Note that the dots in 2 fand 1.g
indicate decimal points and not
multiplication.
a) What are the peak MIPS performances for both machines?
b) Which implementation is faster, if half the instructions executed in a certain program are from
class A, while the rest are divided equally among classes B and C.
c) What speedup factor for the execution of class-A instructions would lead to 20% overall
speedup?
d) What is the maximum possible speedup that can be achieved by only improving the execution
of class-A instructions? Explain why.
e) What is the clock rate required for microprocessor M1 to be a "1000 MIPS" (not peak MIPS)
processor?
Chapter 2 Solutions
Computer Science: A Structured Programming Approach Using C, Third Edition
Ch. 2 - The purpose of a header file, such as stdio.h, is...Ch. 2 - Prob. 2PSCh. 2 - The C standard function that receives data from...Ch. 2 - Which of the following statements about the...Ch. 2 - Which of the following statements about block...Ch. 2 - Prob. 6PSCh. 2 - Which of the following is not a data type?...Ch. 2 - The code that establishes the original value for a...Ch. 2 - Prob. 9PSCh. 2 - Prob. 10PS
Ch. 2 - To print data left justified, you would use a in...Ch. 2 - Prob. 12PSCh. 2 - One of the most common errors for new programmers...Ch. 2 - Which of the following is not a character constant...Ch. 2 - Which of the following is not an integer constant...Ch. 2 - Which of the following is not a floating-point...Ch. 2 - Prob. 17PSCh. 2 - Which of the following is not a valid identifier...Ch. 2 - What is the type of each of the following...Ch. 2 - What is the type of each of the following...Ch. 2 - Which of the following identifiers are valid and...Ch. 2 - Which of the following identifiers are valid and...Ch. 2 - What is output from the following program...Ch. 2 - Prob. 24PSCh. 2 - Find any errors in the following program....Ch. 2 - Find any errors in the following program....Ch. 2 - Prob. 27PSCh. 2 - Prob. 28PSCh. 2 - Prob. 29PSCh. 2 - Code the variable declarations for each of the...Ch. 2 - Code the variable declarations for each of the...Ch. 2 - Write a statement to print the following line....Ch. 2 - Write a program that uses four print statements to...Ch. 2 - Write a program that uses four print statements to...Ch. 2 - Write a program that uses defined constants for...Ch. 2 - Prob. 36PSCh. 2 - Prob. 37PSCh. 2 - Write a program that prompts the user to enter an...Ch. 2 - Write a C program using printf statements to print...Ch. 2 - Write a program that reads a character, an...Ch. 2 - Write a program that prompts the user to enter...Ch. 2 - Write a program that reads 10 integers and prints...Ch. 2 - Write a program that reads nine integers and...
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