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Files Unit Test

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Last updated over 2 years ago
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Asemmisa {{asɛmmisaAhyɛnsode}}
1.

What is output by the code below?

Scanner s = new Scanner("aplus comp sci 212");

System.out.println( s.next() );

Asemmisa {{asɛmmisaAhyɛnsode}}
2.

What is output by the code below?

Scanner s = new Scanner("aplus comp sci 212");

s.next();

System.out.println( s.next() );

Asemmisa {{asɛmmisaAhyɛnsode}}
3.

What is output by the code below?

Scanner s = new Scanner("aplus comp sci 212");

s.next();

s.next();

System.out.println( s.next() );

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

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() );

Asemmisa {{asɛmmisaAhyɛnsode}}
5.

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() );

Asemmisa {{asɛmmisaAhyɛnsode}}
6.

What is output by the code below?

Scanner s = new Scanner("1337 888 212 91");

s.next();

s.next();

System.out.println( s.nextInt() );

Asemmisa {{asɛmmisaAhyɛnsode}}
7.

What is output by the code below?

Scanner s = new Scanner("13 8 25 9");

System.out.println( s.nextInt() + s.nextInt() );

Asemmisa {{asɛmmisaAhyɛnsode}}
8.

What is output by the code below?

Scanner s = new Scanner("aplus comp sci 212");

System.out.println( s.nextInt() );

Asemmisa {{asɛmmisaAhyɛnsode}}
9.

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() );

Asemmisa {{asɛmmisaAhyɛnsode}}
10.

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 );

Asemmisa {{asɛmmisaAhyɛnsode}}
11.

What is output by the code below?

Scanner s = new Scanner("15 20.5 99 11.5");

System.out.println( s.nextInt() );

Asemmisa {{asɛmmisaAhyɛnsode}}
12.

What is output by the code below?

Scanner s = new Scanner("15 20.5 99 11.5");

s.nextInt();

System.out.println( s.nextInt() );

Asemmisa {{asɛmmisaAhyɛnsode}}
13.

What is output by the code below?

Scanner s = new Scanner("15 20.5 99 11.5");

s.nextInt();

System.out.println( s.nextDouble() );

Asemmisa {{asɛmmisaAhyɛnsode}}
14.

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());

Asemmisa {{asɛmmisaAhyɛnsode}}
15.

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());

Asemmisa {{asɛmmisaAhyɛnsode}}
16.

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();

Asemmisa {{asɛmmisaAhyɛnsode}}
17.

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++;

}

Asemmisa {{asɛmmisaAhyɛnsode}}
18.

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++;

}

Asemmisa {{asɛmmisaAhyɛnsode}}
19.

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);

Asemmisa {{asɛmmisaAhyɛnsode}}
20.

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());

Asemmisa {{asɛmmisaAhyɛnsode}}
21.

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());

Asemmisa {{asɛmmisaAhyɛnsode}}
22.

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 + " ");

}

Asemmisa {{asɛmmisaAhyɛnsode}}
23.

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 + " ");

}