Questions and CORRECT Answers
Which of the following IS NOT a valid relational operator in Java?
a. <=
b. >
c. ==
d. <>
e. != - CORRECT ANSWER✔✔- <>
A _____________ loop always executes its loop body at least once.
a. do
b. while
c. repeat
d. for
e. There are no loop structures with this property in Java. - CORRECT ANSWER✔✔- do
Suppose we want to condition an if statement on whether two String objects, referenced by
stringOne and stringTwo, are the same. Which of the following is the correct way to achieve
this?
a. if(stringOne == stringTwo)
b. if(stringOne.compareTo(stringTwo))
c. if(stringOne.equals(stringTwo))
d. if(stringOne != stringTwo)
e. if(stringOne = stringTwo) - CORRECT ANSWER✔✔- c. if(stringOne.equals(stringTwo))
Which of the following for loop headers will cause the body of the loop to be executed 10
times?
,a. for(int i = 0; i <= 10; i++)
b. for(int i = 0; i < 10; i++)
c. for(int i = 1; i <= 11; i++)
d. for(int i = 1; i < 10; i++)
e. None of these for loops will execute the loop body 10 times. - CORRECT ANSWER✔✔-
for(int i = 0; i < 10; i++)
Which boolean operation is described by the following table?
A - B - Operation
True - True - True
True - False - True
False - True - True
False - False - False
a. and
b. not
c. or
d. none of the above - CORRECT ANSWER✔✔- or
Which boolean operation is desrcibed by the following table?
A - B - Operation
True - True - True
True - False - False
False - True - False
False - False - False
a. and
b. not
,c. or
d. none of the above - CORRECT ANSWER✔✔- and
Which of the following boolean expressions tests to see if x is between 2 and 15 (including 2
and 15)?
a. (x <= 15 || x >= 2)
b. (2 <= x || x <= 15)
c. (x >= 2 && x <= 15)
d. (2 <= x <= 15) - CORRECT ANSWER✔✔- (x >= 2 && x <= 15)
What is the value of i after the following code fragment?
int i = 5;
switch(i)
{
case 0:i = 15;break;
case 1:i = 25;break;
case 2:i = 35;break;
case 3:i = 40;break;
default:i = 0;
}
a. 0
b. 15
, c. 35
d. 40
e. 25 - CORRECT ANSWER✔✔- 0
Given the following code, what is the final value of i?
int i;
for(i = 0; i <= 4;i ++ )
{
System.out.println(i);
}
a. 3
b. 4
c. 5 - CORRECT ANSWER✔✔- 5
Which of the following are valid case statements in a switch?
a. case 'ab':
b. case 1.5:
c. case 1:
d. case x < 4; - CORRECT ANSWER✔✔- case 1:
Given the following code fragment, and an input value of 5, what is the output?
int x;
if( x < 3)