Visit the IT department at your school or at a local company and find out whether performance measurements are used. Write a brief report describing your findings.
What will be an ideal response?
System performance measurement, or benchmarking, also is discussed in Chapter 7. In Chapter 12, the focus is on specific performance and workload measurements, such as response time, bandwidth and throughput, and turnaround time. Most network managers use performance measurement software to monitor network performance and detect problems. If students are unable to verify what software is being used, they could perform additional research on the Web to identify examples of performance management programs.
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The second expression appearing in the header of a for loop is the _____________, which is a Boolean expression that determines whether the loop will repeat.
a. test expression b. update expression c. initialization expression d. control expression
If you have a program that may or may not execute a while loop, is it possible to replace that while loop with a do while loop? Explain your answer.
What will be an ideal response?
Which of the following terms is consistent with Microsoft terminology?
A. application B. software C. program D. app
Find the error(s) in the following code, which is supposed to read a line from some- file.txt, convert the line to uppercase, then append it to somefile.txt.
``` 1 String file = "someFile.txt"; 2 String contents; 3 4 File someFile = new File( file ); 5 FileReader inputFile = new FileReader( someFile ); 6 BufferedReader input = new BufferedReader( inputFile ); 7 8 contents = input.readLine(); 9 10 contents = contents.toUpperCase(); 11 12 input.close(); 13 14 FileWriter outputFile = new FileWriter( someFile, false ); 15 PrintWriter output = new PrintWriter( outputFile ); 16 17 output.println( contents ); 18 output.close(); ```