When is an interface "good"?



When is an interface "good"? ..

Answer / abalonesoft

When it provides a simplified view of a chunk of software,
and it is expressed in the vocabulary of a user (where a
"chunk" is normally a class or a tight group of classes, and
a "user" is another developer rather than the ultimate
customer).

The "simplified view" means unnecessary details are
intentionally hidden. This reduces the user's defect-rate.
The "vocabulary of users" means users don't need to learn a
new set of words and concepts. This reduces the user's
learning curve.

Is This Answer Correct ?    0 Yes 0 No

Post New Answer

More C Interview Questions

what is meant by c

9 Answers   INiTS,


the number of measuring units from a arbitrary starting point in a record area or control block to some other point a) branching b) recording pointer c) none d) offset

0 Answers  


Explain how can you tell whether a program was compiled using c versus c++?

0 Answers  


What is structure and union in c?

0 Answers  


The OS is a program that uses various data structures. Like all programs in execution, you can determine the performance and other behavior of the OS by inspecting its state - the values stored in its data structures. In this part of the assignment, we study some aspects of the organization and behavior of a Linux system by observing values of kernel data structures exposed through the /proc virtual file system. The /proc virtual file system: Linux uses the /proc file system to collect information from kernel data structures. The /proc implementation provided with Linux can read many different kernel data structures. If you cd to /proc on a Linux machine, you will see a number of files and directories at that location. Files in this directory subtree each corresponds to some kernel data structure. The subdirectories with numeric names contain virtual files with information about the process whose process ID is the same as the directory name. Files in /proc can be read like ordinary ASCII files. You can open each file and read it using library routines such as fgets() or fscanf(). The proc (5) manual page explains the virtual files and their content available through the /proc file system. Requirements in detail: In this part, you are asked to write a program to report the behavior of the Linux kernel. Your program should run in two different versions. The default version should print the following values on stdout: • Processor type • Kernel version • The amount of memory configured into this computer • Amount of time since the system was last booted A second version of the program should run continuously and print lists of the following dynamic values (each value in the lists is the average over a specified interval): • The percentage of time the processor(s) spend in user mode, system mode, and the percentage of time the processor(s) are idle • The amount and percentage of available (or free) memory • The rate (number of sectors per second) of disk read/write in the system • The rate (number per second) of context switches in the kernel • The rate (number per second) of process creations in the system If your program (compiled executable) is called proc_parse, running it without any parameter should print out information required for the first version. Running it with two parameters "proc_parse <read_rate> <printout_rate>" should print out information required for the second version. read_rate represents the time interval between two consecutive reads on the /proc file system. printout_rate indicates the time interval over which the average values should be calculated. Both read_rate and printout_rate are in seconds. For instance, proc_parse 2 60 should read kernel data structures once every two seconds. It should then print out averaged kernel statistics once a minute (average of 30 samples). The second version of your program doesn't need to terminate.

0 Answers   Cognos,






How can I access a memory located at certain address?

2 Answers   CSC,


create a C program that displays one z,two y's,three x's until twenty six A's. plzz answer i need it tomorrow.

4 Answers  


Can you write a programmer for FACTORIAL using recursion?

0 Answers   ADP,


What are extern variables in c?

0 Answers  


What is hashing in c?

0 Answers  


#define FALSE -1 #define TRUE 1 #define NULL 0 main() { if(NULL) puts("NULL"); else if(FALSE) puts("TRUE"); else puts("FALSE"); }

1 Answers  


what is op? for(c=0;c=1000;c++) printf("%c",c);

21 Answers   Trigent,


Categories