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Amarjyoti Saraswati International School FIRST PRELIM EXAMIMATION 2019-20 STANDARD : X MAX MARKS : 100 SUBJECT : COMPUTER APPLICATIONS DATE : /12/2019 TIME : 2Hrs Answers to this paper must be written on the paper provided separately. You will NOT be allowed to write during the first 15 minutes. This time is to be spent in reading the question paper. The time given at the head of this paper is the time allowed for writing the answers. This paper is divided into two sections, Section A and Section B. You have to answer all the questions from Section A and four questions from Section B. The intended marks for questions or the part of the questions are given in the brackets []. SECTION A (40 MARKS) (Attempt all the questions ) Question 1. (a) Name any two basic principles of Object-oriented Programming. (b) Explain the use of this keyword with a suitable example.. (c) Name the keyword which: (i) indicates that a method has no return type. (ii) makes the variable as a class variable. (d) What do you mean by pass by reference ? (e) Give the result of the following , in terms of Boolean values : (i) 2.5 != 2.5 [1] [2] [2] [1] [2] (ii) (12/3) > ((8/4)*2) (f) Identify and name the following tokens: (i) public (ii) 'a' (iii) == (iv) { } Question 2. (a) State a difference between Instance and static variables . (b) Give the output of the following: Math.sqrt(Math.max(9,16)) (c) Write the output for the following: String s1 = ''Gods Of''; String s2 =''Sky'' ; System.out.println(s1.substring(0).concat(s2.substring(2))); System.out.println(s2.toUpperCase()); (d) Evaluate the following expression if the value of x=2, y=3 and z=1. v=x+ --z+ y++ +y (e) String x[] = {"Artificial intelligence", "IOT", "Machine learning", "Big data"}; Give the output of the following statements: (i) System.out.println(x[3]); (ii) System.out.println(x.length); Question 3. [2] [2] [2] [2] [2] [2]
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