COMP 249 Midterm: COMP 249 Midterm Winter A 2015

• School: Concordia University
• Department: Computer Sci.
• Course: COMP 249
• Professor: All

Document Summary

Write only on the provided sheets, however you may write on the back of each question sheet if you need extra space. Variant a (1 mark) consider the following code snippet. [01] generated by the following code. int[] a={3,1,3,3,7}; int[] b={4,1}; int[][] c={b,a}; System. out. println(a[a[3]-b[1]]); a[3-1]=a[1]=3 (1 mark) what will the output/exception be if the last line of question [01] is. System. out. println(c[a[2]][1]); c[2][1] = indexoutofbounds exception (1 mark) what will the output/exception be if the last line of question [01] is. System. out. println(c[b[1]][a[2]]); c[1][3]=a[3]=3 (1 mark) what will the output/exception be if the last line of question [01] is. [05] (2 marks) consider the following three commented lines: int[] a; int[] b=null; int[] c={}; 1 b/c a is uninitiated. (2 will return null pointer exception at runtime and 3 is ne) [06] (4 marks) consider the following method: public static void methoda (int a) { for(int i=1;i<=a;i++){ Write the equivalent method recursively. public static void methodb (int a) { if (a>1) methodb(a-1);