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ICSE 2013 COMPUTER PAPER WITH SOLUTIONS...

30 pages, 26 questions, 0 questions with responses, 0 total responses,

Umang Bhargava
St. Joseph's Boys' School (SJBS), Jalandhar
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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 equation 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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