Cs124 pratctice
21. which fragment of code accepts a user's address (such as "1600 penn...
Computers and Technology, 06.10.2019 23:30 SMNS625
Cs124 pratctice
21. which fragment of code accepts a user's address (such as "1600 pennsylvania avenue")?
a. char address;
cin > > address;
c. char address[256];
cin. getline(address, 256);
b. char address;
cin. getline(address);
d. char address[256];
cin > > address;
22. what is the value of a after the following code is executed:
{
bool a = (3 == 'a');
}
a. true
b. false
23. what is the value of b after the following code is executed:
{
bool a = ! (true);
bool b = ! (true & & false) & & a;
}
a. true
b. false
24. what is the value of e after the following code is executed:
{
bool a = (10 < 10);
bool b = ! a;
bool c = a || b;
bool d = c & & (b || a);
bool e = d & & d;
}
a. true
b. false
25. what is the value of a after the following code is executed:
{
bool a = 42;
}
a. true
c. undefined
b. false
d. syntax error
26. what is the output:
{
char a = 'a';
if (a = 'b')
a = 'c';
else
a = 'd';
cout < < a < < endl;
}
a. a
b. b
c. c
d. d
27. which of the following fragments of code will determine whether i have passed a class?
a. bool pass = (grade => 60);
b. bool pass = false;
if (grade < 60)
pass = true;
c. bool pass = < 60));
d. bool pass = true;
if (grade = 60)
pass = false;
28. what is the output:
{
int z = 3;
if (z = 4);
cout < < "error";
cout < < z < < endl;
}
a. error
b. 3
c.
d. error 4
29. what is the output?
void a()
{
cout < < 6;
return;
}
int main()
{
cout < < 3;
a();
cout < < 9;
return 0;
}
a. 39
b. 6
c. 369
d. 639
30. what is the output of the following program:
void subtract(int b, int a)
{
cout < < a - b < < endl;
return;
}
int main()
{
int a = 16;
int b = 12;
subtract(a, b);
return 0;
}
a. 12
c. 16
b. 4
d. -4
31. what is the output?
int two()
{
return 6;
}
int main()
{
int one = 10;
int three = two() + one;
cout < < three < < endl;
return 0;
}
a. 6
b. 10
c. 3
d. 16
32. what is the output?
double z(double b double c)
{
return b - c;
}
int main()
{
cout < < z(20.6 10.2) < < endl;
return 0;
}
a. 30.8
b. 10.4
c. compile error
d. z(20.6, 10.2)
33. what is the output of the following program:
double z(double a1, double a2)
{
return a1 + a2;
}
int main()
{
double a = z(2, 4);
double b = z(a, z(11, 11));
cout < < b < < endl;
return 0;
}
a. 22
c. 28
b. 6
d. 11
34. what is the output of the following program:
int setseven(int value)
{
value = 7;
return value;
}
int main()
{
int value = 6;
setseven(value);
cout < < value < < endl;
return 0;
}
a. value
c. 6
b.
d. 7
35. what is the output of the following program:
void function(int x, int & y)
{
x = 0;
y = 0;
return;
}
int main()
{
int m = 2;
int n = 6;
function(m, n);
cout < < "m == " < < m < < endl
< < "n == " < < n < < endl;
return 0;
}
a. m == 2
n == 6
c. m == 2
n == 0
b. m == 0
n == 0
d. m == 0
n == 6
36. which best describes a computer bus?
a. a device that outputs data to the user or accepts input from the user
c. a chip that moves data from one part of the computer to another
b. the data connection between main memory and the cpu
d. the data connection between the components of a computer
37. if your body was a computer, select all the von neumann functions that the spinal cord would perform.
a. bus
c. memory
b. i/o
d. cpu
38. a digital wrist watch is a computer. which von neumann component is the display?
a. memory
c. bus
b. cpu
d. i/o
39. which part of a compiler breaks a program up into words or tokens?
a. parser
c. linker
b. lexer
d. code generator
40. 3 byte(s) equals
a. 3 bits
d. 12 bits
b. 96 bits
e. 6 bits
c. 24 bits
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