In this ICSE sample paper class 9, all the topics of java for ICSE computer application has been covered.
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ICSE sample paper class 9
Section A (40 marks)
A. Answer the following questions. (Attempt any 10) [10X2=20]
1. Write the syntax of the Ternary operator.
2. What will be the output of the following code?
int marks=40;
System.out.println((marks>=35)?”Pass”:”Fail”);
3. State the output.
{
int a=5;
while(a<20)
{
a++;
if(a==10)
break;
System.out.println(a);
}
}
4. What is the difference between ‘=’ and ‘==’?
5. List all types of operators, with 2 examples each
6. What is an identifier, give its rules of naming.
7. What are the comments?
8. What is multi-user & multitasking operating system? give examples
9. What is the internet? Give its 4 uses
10. In what way you can say a class is the creator of similar objects?
11. Explain how is JAVA compilation different from the ordinary compilation?
12. Convert the following to the java expression.
a^2 +b^9
13. What is malware, explain anyone?
14. What will be the value of x if
x=5
x+=x++ - --x + 6;
15. Categorize the following into class & object
- A car
- Nokia Lumia E series
- A cello pen
- A book
B. Long questions and answers(Attempt any four ) [4X5=20]
1. Expand these
- ISP
- SMTP
- JVM
- FTP
- TCP/IP
2. Explain any two OOP principals ICSE sample paper class 9
3. Explain the use of the following
- Interger.parseInt();
- br.readLine();
4. Explain what is JVM , what is byte code & source code?
5. Explain all the tokens in detail, with 2 examples each?
6. Explain conditional control statements and looping control statements in detail with their use supported with Syntax.
7. Explain the following
- What is spam?
- Who are hackers?
8. Write the output of the following
- Math.min(Math.ceil(61.2),Math.floor(22.8));
- Math.rint(Math.sqrt(16),+1.5);
- Math.PI*2;
- Math.pow(5,2);
- Math.max(Math.pow(2,3),4);
ICSE sample paper class 9
Section B (60 marks)
C. Write JAVA Programs with Dry run and output of the program when necessary (Attempt any six) [6X10= 60]
- Write a program to display the following pattern. [10]
1
2 3
4 5 6
7 8 9 10
?
??
???
????
?????
2. Write a program to display the following pattern. [10]
11111
1111
111
11
1
3. Write a program to accept a number from the user and print whether it is a perfect number or not. (A perfect number is a number whose sum of factors excluding the number is equal to the number)
4. Write a program to accept a number and reverse it.
5. Write a program to print the following series.
1, 8, 27, 64, 100
5 10 15 20 25 …..n
6. Write a program to print the Fibonacci series for the first 10 numbers.
7. Write a program to accept 4 values, find and print the LCM of the numbers ICSE sample paper class 9
8. Write a program to display the even and odd numbers between 1 to 100 and print their sum also.
9. Write a program to enter any limit & print the sum of the following series sum=1 /2+3/4+5/6……….+n-1/n
10. Write a program to accept a number from the user and print whether it is an Armstrong number or not. (An Armstrong number is a number whose sum of the cube of the digits is equal to the number)
11. Write a java program to ask the user to enter basic salary of employees & calculate net pay.
Net pay= basic salary – income tax
Income tax is calculated based on the following
Basic salary <20000--🡪 income tax 5% of basic salary
Basic salary >20000--🡪 income tax 10% of basic salary
ICSE sample paper class 9