Library

Files Unit Test

By Mickey Arnold
Last updated 10 months ago
23 Questions

What is output by the code below?

Scanner s = new Scanner("aplus comp sci 212");
System.out.println( s.next() );


What is output by the code below?
Scanner s = new Scanner("aplus comp sci 212");
s.next();
System.out.println( s.next() );


What is output by the code below?
Scanner s = new Scanner("aplus comp sci 212");
s.next();
s.next();
System.out.println( s.next() );


What is output by the code below?
Scanner s = new Scanner("aplus comp sci 212");
s.next();
s.next();
s.next();
System.out.println( s.next() );


What is output by the code below?
Scanner s = new Scanner("aplus comp sci 212");
s.next();
s.next();
s.next();
s.next();
System.out.println( s.next() );


What is output by the code below?
Scanner s = new Scanner("1337 888 212 91");
s.next();
s.next();
System.out.println( s.nextInt() );


What is output by the code below?
Scanner s = new Scanner("13 8 25 9");
System.out.println( s.nextInt() + s.nextInt() );


What is output by the code below?
Scanner s = new Scanner("aplus comp sci 212");
System.out.println( s.nextInt() );


What is output by the code below?
Scanner s = new Scanner("aplus comp sci 212");
s.next();
s.next();
s.next();
System.out.println( s.nextInt() );


What is output by the code below?
Scanner s = new Scanner("aplus comp sci 212");
s.next();
s.next();
s.next();
System.out.println( s.nextInt() * 2 );


What is output by the code below?
Scanner s = new Scanner("15 20.5 99 11.5");
System.out.println( s.nextInt() );


What is output by the code below?
Scanner s = new Scanner("15 20.5 99 11.5");
s.nextInt();
System.out.println( s.nextInt() );


What is output by the code below?
Scanner s = new Scanner("15 20.5 99 11.5");
s.nextInt();
System.out.println( s.nextDouble() );


Consider the code that follows.
Scanner scan = new Scanner("4 3 2 5 1");
int sum = 0;
while(scan.hasNextInt())
{
/* code */
}
Which of the following are valid statements?
I.
System.out.println(scan.next());
II.
sum += scan.next();
III.
System.out.println(scan.nextInt());

Consider the code that follows.
Scanner scan = new Scanner("4.7 3 2.4 5 1");
double sum = 0;
while( scan.hasNextDouble() )
{
/* code */
}
Which of the following are valid statements?
I.
sum += scan.next();
II.
sum += scan.nextDouble();
III.
System.out.println(scan.nextInt());

Consider the code that follows.
Scanner scan = new Scanner("4.7 it at 2.4 5 1");
String sum = "";
while( scan.hasNext() )
{
/* code */
}
Which of the following are valid statements?
I.
sum += scan.next();
II.
sum += scan.nextInt();
III.
sum += scan.nextDouble();


What is output by the code below?
Scanner s = new Scanner("a 2 f q 7e 8 r 2 a");
int count = 0;
while(s.hasNext())
{
if (count % 3 == 1)
out.print(s.next() + " ");
else
s.next();
count++;
}


What is output by the code below?
Scanner s = new Scanner("a 2 f q 7e 8 r 2 a");
int count = 0;
while(s.hasNext())
{
if (count % 3 == 1)
out.print(s.next() + " ");
count++;
}


What is output by the code below?
Scanner s = new Scanner("a 2 f q 7e 8 r 2 a");
int count = 0;
while(s.hasNext())
{
if (count % 3 == 1)
count++;
s.next();
}
System.out.println(count);


What is the output by the code below using the following data file?
nums.dat
34
23
11
22


Scanner file = new Scanner(new File("nums.dat"));
System.out.println(file.nextInt()+" "+file.nextLine());


What is the output by the code below using the following data file?
nums.dat
34
23
11
22



Scanner file = new Scanner(new File("nums.dat"));
System.out.println(file.nextInt()+" "+file.next());


What is the output by the code below using the following data file?
nums.dat
3
34
23
11
22


Scanner file = new Scanner(new File("nums.dat"));
int size = file.nextInt();
for(int i=1; i < size; i++)
{
int num = file.nextInt();
out.print( num + " ");
}


What is the output by the code below using the following data file?
nums.dat
5
34
23
11
22


Scanner file = new Scanner(new File("nums.dat"));
int size = file.nextInt();
for(int i=1; i <= size; i++)
{
int num = file.nextInt();
out.print(num + " ");
}