Answer Key of Computer Applications Class X (1st Term Exam - ICSE)

Students are required to assess their performance by looking at the answers of MCQs. Rest answers are descriptive, so it has not been given here.

(i) Which of the following is used to create a Symbolic constant in Java?

a) ✅ final
b) Final
c) Constant
d) Const

(ii) Identify the type of Operator &&
a) Ternery
b) Unary
c) ✅ Logical
d) Relational

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(iii) Assertion(A): In Java, statements written in lower case letter or uppercase letter are treated as same.
Reason(R): Java is case sensitive language.
a) Both A and R are true and R is correct explanation
b) Both A and R are true and R is not a correct explanation
c) Assertion(A) is true and Reason(R) is false
d) ✅ Assertion(A) is false and Reason(R) is true

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(iv) The number of bytes occupied by a character array of 10 elements is
a) ✅ 20 bytes
b) 60 bytes
c) 40 bytes
d) 120 bytes

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(v) The method of Scanner class used to accept an integer value is:
a) ✅ nextInt()
b) nextDouble()
c) next()
d) newDouble()

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(vi) int res = 'B';
What is the value of res?
a) ✅ 66
b) 68
c) 65
d) 72

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(vii) The output of Math.ceil(Math.abs(-8.6)) is
a) ✅ 9.0
b) 13.0
c) 37.0
d) 13

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(viii) To execute a loop 15 times, which of the following is correct
a) ✅ for(int i = 10; i <= 38; i += 2)
b) for(int i = 10; i <= 38; i += 3)
c) for(int i = 15; i <= 38; i += 2)
d) for(int i = 10; i <= 38; i += 4)

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(ix) A single dimensional array has 20 elements. Which of the following is the correct statement to initialize the last element to 250?
a) x[23] = 250
b) x[24] = 250
c) ✅ x[19] = 250
d) x[50] = 250

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(x) The method to convert a lowercase character to uppercase is:
a) String.toUpperCase()
b) Character.isUppercase(char)
c) ✅ Character.toUpperCase(char)
d) toUpperCase()

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(xi) Output of the following String methods:
"SUCCESS".indexOf('S') + "SUCCESS".lastIndexOf('S')
a) 0
b) 5
c) ✅ 6
d) -5

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(xii) Output of the following code:
System.out.println("Good".concat("Day"));
a) ✅ GoodDay
b) Good Day
c) Goodday
d) goodDay

(xiii) What does the following picture indicates:

2

6

8

9

16

a)      A single dimensional Array having 5 elements.
b)      A single dimensional Array with last index 4
c)      ✅Both a) and b)
d)   None of the above

(xiv) The correct statement to create an object named mango of class fruit is:
a) Fruit Mango = new fruit();
b) ✅ fruit mango = new fruit();
c) Mango fruit = new fruit();
d) fruit mango = new mang();

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(xv) do…while loop is an:
a) Entry Controlled Loop
b) Infinite Loop
c) ✅ Exit Controlled Loop
d) Finite Loop

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(xvi) Which of the following might make the Java compiler report a Syntax error in a particular line of a program?
a) The program is typed in wrong font.
b) ✅ The line contains a comma(,) instead of a dot(.)
c) It is caused by Java runtime.
d) Program takes too long to complete.

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(xvii) Assume x = 1 with the following code snippet:
int y = --x;
Which one of the following is true?
a) x = 1, y = 1
b) ✅ x = 0, y = 0
c) x = 1, y = 0
d) x = 0, y = 1

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(xviii) Which element is num[9] of array num?
a) 8th
b) 9th
c) ✅ 10th
d) 11th

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(xix) What is the type of casting shown in the following example:
char c = (char)120;
a) Implicit Typecasting
b) ✅ Explicit Typecasting
c) Both a and b
d) None of the above

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(xx) Which of the following statement will declare an array marks of base type int and which can hold 150 elements
a) ✅ int marks[] = new int[150]
b) int mark[] = new int[150]
c) Int marks[] = new int[150]
d) int marks[] = new marks[150]