CHAPTER 10: DEVELOPING UNIX/LINUX APPLICATIONS IN C AND C++
TRUE/FALSE
1. The C language was partly developed to resolve the more lengthy requirements of assembly language.
2. Dennis Ritchie and Brian Kernighan rewrote most of UNIX using C++ in the early 1960s.
3. C can be described as a language that uses relatively short, isolated functions to break down large,
complex tasks into small and easily resolved subtasks.
4. A variable’s data type determines the upper and lower limits of its range of values.
5. The word “null” is used to indicate that a function returns no data.
6. fgetch() reads a single character from the file and points to it.
7. Unlike many other library input functions, readf() can be used to input values of a variety of data
types.
8. C++ uses // to denote a comment line.
MULTIPLE CHOICE
1. ____ is the language in which UNIX was developed and refined.
a.
C
c.
Perl
b.
C++
d.
Awk
2. The original UNIX operating system was written in ____.
a.
C
c.
assembly language
b.
C++
d.
Awk
3. ____ is a low-level language that provides maximum access to all the computer’s devices, both
internal and external.
a.
C
c.
Assembly language
b.
C++
d.
Awk
4. The source code of a C program file is stored in a file with the ____ extension.
a.
.C
c.
.gc
b.
.c
d.
.src
5. A compiler is a program that translates the source code into ____ code, which consists of binary
instructions.
a.
compiled
c.
binary
b.
binary
d.
object
6. The output of a linker is a(n) ____ file.
a.
executable
c.
object
b.
binary
d.
source code
7. ____ have special meanings, so you cannot use them as names for variables or functions.
a.
Labels
c.
Constants
b.
Tags
d.
Keywords
8. The ____ data type occupies a single byte.
a.
char
c.
float
b.
int
d.
double
9. You can use three modifiers with int data types: short, long, and ____.
a.
scalar
c.
array
b.
unsigned
d.
double
10. When you represent character data in a program as a character constant, you enclose the character in
____.
a.
curly braces
c.
single quotation marks
b.
angle braces
d.
double quotation marks
11. A(n) ____ is a group of characters, such as a name.
a.
array
c.
scalar
b.
string
d.
hash
12. When you use string constants in your C program, they must be enclosed in ____.
a.
curly braces
c.
single quotation marks
b.
angle braces
d.
double quotation marks
13. ____ is an example of how you can declare a string in C.
a.
string name;
c.
String name;
b.
string name[20];
d.
char name[20];
14. The ____ of a variable is the part of the program in which the variable is defined and, therefore,
accessible.
a.
aim
c.
length
b.
reach
d.
scope
15. Variables that are declared inside a function are called ____ variables.
a.
global
c.
scalar
b.
automatic
d.
independent
16. Automatic variables are ____ to the function in which they are declared.
a.
global
c.
local
b.
assigned
d.
unique
17. C’s increment operator is ____.
a.
++
c.
+=
b.
+
d.
=+
18. The decrement operator is a(n) ____ operator.
a.
unary
c.
primary
b.
binary
d.
arbitrary
19. The ____ format specifier is used to denote a signed decimal integer.
a.
%c
c.
%f
b.
%d
d.
%s
20. The ____ format specifier is used to denote a floating point number in decimal notation.
a.
%c
c.
%u
b.
%d
d.
%f
21. C provides three looping mechanisms: the for loop, the while loop, and the ____ loop.
a.
do-while
c.
while-do
b.
switch
d.
repeat-until
22. ____ are continuous streams of data.
a.
Arrays
c.
Files
b.
Strings
d.
Pointers
23. The ____ utility tracks what needs to be recompiled by using the time stamp field for each source file.
a.
compile
c.
configure
b.
gcc
d.
make
24. The ____ scanf() format specifier is used to indicate that scanf() should interpret the input value as a
pointer.
a.
%p
c.
%r
b.
%P
d.
%R
COMPLETION
1. A C program consists of separate bodies of code, known as ____________________.
2. Many compilers translate source code into assembly code. This requires that a(n)
____________________ be called up to translate the assembly code into object code.
3. C’s ____________________ header file contains information the compiler needs to process standard
input or output statements.
4. ____________________ are names given to variables and functions.
5. When you ____________________ a function, you declare the function’s name and create the lines of
code that make up the function’s block of code.
6. C++ enables function ____________________, which makes the functions respond to more than one
set of criteria and conditions.
MATCHING
Match each item with a statement below.
a.
main()
f.
stdio.h
b.
a.out
g.
{
c.
null
h.
gcc
d.
%
i.
#include <stdio.h>
e.
/*
1. executable file which, by default, contains a compiled C program
2. every C program must contain this function
3. denotes the beginning of a block of code
4. denotes the beginning of a comment
5. is a preprocessor directive
6. is a header file
7. a single byte in which all bits are set to zero
8. modulus operator
9. command for the C compiler in Linux operating systems
SHORT ANSWER
1. What is a daemon?
2. What is a source code file?
3. What is the role of the C preprocessor?
4. What is the role of a linker program?
5. What does the C library contain?
6. Provide at least three rules that should be followed when naming variables in C.
7. What is the scope of a global variable?
8. What is the role of the control string in the printf() function?
9. What is the role of the if statement?
10. What is the difference between the while loop and the do-while loop?
11. What is the role of a function prototype?
12. What is an object?