Choose the correct answer

Algorithmic Problem Solving

Composition and Decomposition

Evaluation

Part I

1. Suppose u, v = 10 ,5 before the assignment. What are the values of u and v after the sequence of assignments?

1 u := v

2 v := u

(a) u, v = 5 ,5

(c) u, v = 10 ,5

(b) u, v = 5 ,10

(d) u, v = 10 ,10

2. Which of the following properties is true after the assignment (at line 3?

1 -- i+j = 0

2 i, j := i+1, j-1

3  -- ?

(a) i+j >0

(b) i+j < 0

(c) i+j =0

(d) i = j

3. If C1 is false and C2 is true, the compound statement

 1 if C1

 2  S1

 3 else

 4    if C2

 5       S2

 6    else

 7       S3

 executes

(a) S1

(b) S2

(c) S3

(d) none

4. If C is false just before the loop, the control flows through

 1 S1

 2 while C

 3      S2

 4 S3

(a) S1 ; S3

(b) S1 ; S2 ; S3

(c) S1 ; S2 ; S2 ; S3

(d) S1 ; S2 ; S2 ; S2 ; S3

5. If C is true, S1 is executed in both the flowcharts, but S2 is executed in

(a) (1) only

(b) (2) only

(c) both (1) and (2)

(d) neither (1) nor (2)

6. How many times the loop is iterated?

 i := 0

  while i ≠ 5

    i := i + 1

(a) 4

(b) 5

(c) 6

(d) 0