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ICSE 2013 solved : Computer Applications

30 pages, 9 questions, 0 questions with responses, 0 total responses,

Manasa Preethi
Sikkim manipal university, Bangalore
Master of Science Information Technology

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ICSE 2013 Q1. (a) What is meant by precedence of operators? [2 marks] A1. (a) Precedence of operators defines the order in which the operators within an expression are executed. The order of evaluation can be modified with the help of parenthesis ( and ). For example, in the expression x = a+b*c the RHS evaluates using a+(b*c) since the * operator has a higher precedence as compared to the + operator. As another example, in the equaion x = a+b > c ? a : b, the + operator has higher precedence over the ternary operator ?: and hence the RHS evaluates to (a+b) > c ? a : b. Q1. (b) What is a literal? [2 marks] A1. (b) A literal is a notation for representing a fixed value in source code. It is a value that is directly represented in code. For example, in the expression int x = 4; , the 4 is a literal. As another example, in the example: String s = Hello ; the Hello is a literal. Q1. (c) State the Java concept that is implemented through: i) A superclass and a subclass ii) the act of representing essential features without including background details [2 marks] A1. (c) i) Inheritance ii) Abstraction Q1. (d) Give a difference between constructor and a method. [2 marks]

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