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S10Mid_Soln

# S10Mid_Soln - University of Waterloo Midterm Examination...

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Page 1 of 10 University of Waterloo Midterm Examination Term: Summer Year: 2010 Student Name:___________________________________________________________ UW Student ID Number:__________________________________________________ Lab Day:___________________________ TA: ___________________________ Course Abbreviation and Number GEN E 121 (Mech C++) Course Title Digital Computation Section(s) 001 Instructor Rajnish Bassi Date of Exam Friday, June 11, 2010 Course Title Start time: 5:00pm End time:7:00pm Duration of Exam 2 hours Allowed Materials: Writing instruments ONE (8.5X11) formula sheet written on ONE side only Disallowed Materials: No electronic devices of any kind No hats or containers such as purses, pencil cases, packsacks Notes: You can assume for any program that any necessary libraries have been imported All questions will be marked for credit If you need to make any assumption to formulate your solution, state your assumption clearly Question Maximum Marks Marks 1. 9 2. 16 3. 10 4. 20 5. 20 6. 25

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Page 2 of 10 1. Arithmetic and Boolean Expressions [9 Marks Total …. 3 marks each] Write the output for the following expressions. a) int main ( ) { int i = 5 ; cout << 5 % 4 + 7 / 3.0 + i++ ; } 8.33 b) int main ( ) { float i = 5.0 ; float j ; j = int (i / 3) ; cout << fixed << setprecision (2) << j ; } 1.00 c) int main ( ) { int i ; i = 5 && 8 == 2/3 ; cout << i ; } 0 2. Short Answer [16 Marks Total …. 4, 4, 4, 4] a) What will be the output? int main ( ) { int i = 5 ; if ( i ) cout << "Block 1" ; else if ( i == 5 ) cout << "Block 2" ; else cout << "Block 3" ; } Block 1
Page 3 of 10 b) What will be the output? (Hint: Carefully observe the syntax) int main ( ) { int x = 5, y = 2 ; if ( x==6 ) ; cout << "Block 1" ; { if ( y==2 ) cout << "Block 2" ; else cout << "Block 3" ; } } Block 1Block 2 c) The following code results in a compile-time error. Indicate how to fix the code.

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