Java print/println exam questions

Here is a quick revision of key items you need to remember before attempting Java print / println questions

1. 1. println() prints the string and THEN moves to next line.
   2. print() prints the string and DOES NOT move to next line.
   3. \n (newline) Moves the cursor to next line. print (“\n”) is equivalent to println()
   4. \t (tab) Leaves 4 or 8 bye of space before printing next.
   5. \”, \\ are examples of how a slash in front of quotes etc. help us to print punctuators which have special meaning in java.
   6. ASCII code for A – Z = 65 – 90
   7. ASCII code for a – z = 97 – 122
   8. To do integer manipulations typecast them to int e.g. int c =  (int)’A’;
   9. To print char equivalent of a number, typecast to char e.g. System.out.print ((char)65);
   10. To convert to uppercase do minus 32 To convert to lowercase do plus 32
   11. Do a double check if you are using int or char for all ASCII code questions
   12. Also attempt print questions which are clubbed with switch and loops

Lets Start!

1. 1. System.out.print(“Simply “);

            System.out.println(“Coding”);

Choose the correct option:  

1. 1. Simply Coding
   2. Simply
      Coding

Ans. (i) is the correct output.

Explanation: System.out.print() does not add a new line at the end because of which ‘Coding’ gets printed on the same line as ‘Simply’.

2. What is the output of the following?

char c = ‘A’;
short m = 26;
int n = c + m;
System.out.println(n);

Ans:  91.

Explanation: This is because adding ‘char’ with integer data type ‘short’, the lower data type ‘char’ converted to integer ‘short’. i.e. ‘A’ becomes 65, so 65+26 is 91

3. Write the output for the following:

System.out.print(“Simply\nt” + “\n” + “\\Coding”);  

Ans.

Simply
t
\Coding

4. Write the Output:

char ch= ‘F’;
int m=ch;
m=m+5;
System.out.println(m+ ” ” +ch);

Ans. 75 F

Explanation:

ch = ‘F’
int m = ch; — ASCII value of ‘F’ i.e. 70 will be assigned to m
m = m + 5 = 70 + 5 = 75
System.out.println(m+ ” ” +ch); — 75 F

5. Give the output and show the dry run too.

public class output1
{
static int m=0,n=0;
public static void main()
{
int m=10, x=20;
{
int n=30;
System.out.println(“m+n=”+(m+n));
}
x+=m+n;
System.out.println(“x=”+x);
}
}

Ans

m+n=40 // (value of ‘n’ is 0 at initialize n=0, but in code block value of ‘n’ is change 0 to 30, so; n=30, m=10=> 30+10 =40)
x=30      //  (n=0, m=10 and x=20 => 20+=10+0;)

6. State the result of the following statement.

System.out.print(“Simply Coding \n”);
System.out.print(“Online \tTutor \t”);
System.out.print(“and Course.”);

Ans.

• • Simply Coding
  • Online       Tutor        and Course.

7. State the result of the following statement.

System.out.print(“Welcome \n to \t “);
System.out.println(“Simply Coding “);
System.out.print(“Online Courses”);

Ans.

Welcome
to         Simply Coding
Online Courses

8. What is the output of following code?

class StringExample{
public static void main(String args[]){
char a= ‘a’;
char b= ‘A’;
System.out.println (“Sum:”+a+b);
System.out.println(“Difference:”+((int)a-(int)b));
}
}

Ans.

Sum:aA

Difference:32

9. What will be the output when the following code segment is executed?

System.out.println (“Welcome to \”Simply Coding!\”programming is fun!”);

Ans. Welcome to “Simply Coding!”programming is fun!

10. Write the output of the following:

System.out.println(“Simply”+“\n”+“Coding”);

Ans. Simply

         Coding