Assignment
QUESTION 1
In Java, the symbol "=" and the symbol "==" are used synonymously (interchangeably).
True
False
QUESTION 2
Given the following code, where x = 0, what is the resulting value of x after the for-loop terminates?
for (int i=0;i<5;i++)
x += i;
A.0
B.4
C.5
D.10
QUESTION 3
The following loop is syntactically valid.
for (int j = 0; j < 1000; j++) j--;
True
False
QUESTION 4
It is possible to convert any type of loop (while, do, or for) into any other.
True
False
QUESTION 5
If x is an int where x = 0, what will x be after the following loop terminates?
while (x < 100)
x *= 2;
2
64
100
128
none of the above, this is an infinite loop
QUESTION 6
Consider the following switch statement where x is an int. If x is currently equal to 3, what will the value of x be after the switch statement executes?
switch (x)
{
case 3 : x += 1;
case 4 : x += 2;
case 5 : x += 3;
case 6 : x++;
case 7 : x += 2;
case 8 : x--;
case 9 : x++;
}
A- 6
B- 11
C- 10
D- 12
QUESTION 7
A switch statement must have a default clause.
True
False
QUESTION 8
How many times will the following loop iterate?
int x = 0;
do {
System.out.println(x);
x++;
} while (x > 0 && x<10);
A.1 timeB.9 timesC.10 timesD.11 times
QUESTION 9
Control in a switch statement jumps to the first matching case.
True
False
QUESTION 10
The following for-loop is an infinite loop.
int i; for (int j = 0; j < 1000; ) i++;
True
False
QUESTION 11
Assume that count is 0, total is 20 and max is 1. The following statement will do which of the following? if (count != 0 && total / count > max) max = total / count;
A- The condition short circuits and the assignment statement is not executed
B- The condition short circuits and the assignment statement is executed without problem
C- The condition does not short circuit causing a division by zero error
D- The condition short circuits so that there is no division by zero error when evaluating the condition, but the assignment statement causes a division by zero error
QUESTION 12
The break statement does which of the following?
A- ends the program
B- transfers control out of the current control structure such as a loop or switch statement
C- ends the current line of output, returning the cursor
D- denotes the ending of a switch statement
E- indicates the end of line when using System.out.print
QUESTION 13
The do loop differs from the while loop in that
A- the while loop will always execute the body of the loop at least once
B- the do loop will always execute the body of the loop at least once
C- the do loop will continue to loop while condition in the while statement is false and the while loop will continue to loop while the condition in the while statement is true
D- the while loop will continue to loop while condition in the while statement is false and the do loop will continue to loop while the condition in the while statement is true
E- none of the above, there is absolutely no difference between the two types of loops
QUESTION 14
Of the following if-statements, which one correctly executes three instructions if the condition is true?
if (x < 0)
a = b * 2;
y = x;
z = a - y;
{
if (x < 0)
a = b * 2;
y = x;
z = a - y;
}if { (x < 0)
a = b * 2;
y = x;
z = a - y ;
}
if (x < 0)
{
a = b * 2;
y = x;
z = a - y;
}
QUESTION 15
How many times will the following loop iterate?
int x = 0;
while (x > 0 && x<10)
{
System.out.println(x);
x++;
}
A.0 times
B.1 time
C.9 times
D.10 times
QUESTION 16
Which of the sets of statements below will add 1 to x if x is positive and subtract 1 from x if x is negative but leave x alone if x is 0?
if (x > 0) x++;
else x--;
if (x > 0) x++;
else if (x < 0) x--;
if (x > 0) x++;
if (x < 0) x--;
else x = 0;
if (x == 0) x = 0;
else x++;
x--;
E) x++;
x--;
QUESTION 17
Assume that x and y are int variables with x = 5, y = 3, and a and d are char variables with a = 'a' and d = 'A', and examine the following conditions:
Condition 1: (x < y && x > 0)
Condition 2: (a != d || x != 5)
Condition 3: !(true && false)
Condition 4: (x > y || a == 'A' || d != 'A')
All 4 Conditions are true, Only Condition 2 is true, Condition 2 and Condition 4 are true only, Conditions 2, 3 and 4 are all true, Condition 1 is not, All 4 Conditions are false
QUESTION 18
You might choose to use a switch statement instead of nested if-else statements ifthe variable being tested might equal one of several hundred int valuesthe variable being tested might equal one of only a few int valuesthere are two or more int variables being tested, each of which could be one of several hundred valuesthere are two or more int variables being tested, each of which could be one of only a few valuesnone of the above, you would never choose to use a switch statement in place of nested if-else statements under any circumstance.
QUESTION 19
The statement if (a >= b) a++; else b--; will do the same thing as the statement if (a < b) b--; else a++;.
True
False
QUESTION 20
Consider the following switch-statement where x is an int. If x is currently equal to 5, what will the value of x be after the switch statement executes?
switch (x)
{
case 3 : x += 1;
case 4 : x += 2;
case 5 : x += 3;
case 6 : x++;
case 7 : x += 2;
case 8 : x--;
case 9 : x++;
}
A.8
B.6
C.11
D.5