CBSE Class 12 Computer Science Chapter 8: Arrays NCERT Solutions

The variable Go is assigned a value using random(2) + 2. The random(2) function typically returns either 0 or 1. Therefore, Go can be either 0 + 2 = 2 or 1 + 2 = 3.

The for loop starts with i = Go and continues as long as i < 4. Let's analyze the two possible values for Go:

• If Go = 2: The loop will execute for i = 2 and i = 3. The elements printed will be X[2] (which is 10) and X[3] (which is 125). The output would be 10$$125.
• If Go = 3: The loop will execute for i = 3. The element printed will be X[3] (which is 125). The output would be 125.

Looking at the options provided, none exactly match the outputs derived from the possible values of Go. However, if we assume the question implies a scenario where the loop runs for at least two iterations, option (iv) 10$$125 is the closest if Go was intended to be 2. Option (iii) 75$$10$$ is incorrect as it starts from index 1. Option (ii) 75$$10$$125$$ is incorrect as it starts from index 1. Option (i) 100$$75 is incorrect as it starts from index 0.

Revisiting the problem, it's possible there's a misunderstanding of the `random` function or the options. If we strictly follow the code and assume `random(2)` can yield 0 or 1, then `Go` is 2 or 3. If `Go` is 2, output is `10$$125`. If `Go` is 3, output is `125`. Neither matches options (i), (ii), or (iii). Option (iv) `10$$125` matches the case when `Go` is 2.

Let's assume option (iv) is the intended correct output, implying Go must be 2.

Maximum value for 'Go': 3 (when random(2) returns 1)

Minimum value for 'Go': 2 (when random(2) returns 0)

Expected Correct Output: Option (iv) 10$$125 (assuming Go = 2)

Maximum Value Assigned to 'Go': 3

Minimum Value Assigned to 'Go': 2

The function grace_score takes an integer array score and its size as input. It iterates through each element of the array using a for loop. Inside the loop, it checks if the current element score[i] is less than 40. If the condition is true, it adds 5 to that element, effectively increasing the score by 5. This process ensures that only scores below 40 receive the grace marks.

Here is the C++ function definition:

void grace_score(int score[], int size) {

for (int i = 0; i < size; i++) {

if (score[i] < 40) {

score[i] = score[i] + 5; } } } The example provided demonstrates this: 35 becomes 40 (35+5), 33 becomes 38 (33+5), and 27 becomes 32 (27+5), while scores 45, 85, 80, and 90 remain unchanged as they are not less than 40.

Let's trace the execution of the repch function with the input string "SUCCESS".

The initial string is "SUCCESS". The program first prints "Original StringSUCCESS".

Now, the repch function is called:

• i = 0: s[0] is 'S'. i%2 is 0. The first if condition is false. The else if condition s[0]==s[1] ('S'=='U') is false.
• i = 1: s[1] is 'U'. i%2 is 1 (odd). s[1]!=s[2] ('U'!='C') is true. Both conditions for the first if are true. So, s[1] becomes '@'. The program prints "Hello". The string is now "S@CCESS".
• i = 2: s[2] is 'C'. i%2 is 0. The first if condition is false. The else if condition s[2]==s[3] ('C'=='C') is true. So, s[3] becomes '!'. Then i++ is executed, making i become 3. The string is now "S@C!ESS".
• i = 3: The loop increments i to 4. s[4] is 'E'. i%2 is 0. The first if condition is false. The else if condition s[4]==s[5] ('E'=='S') is false.
• i = 4: s[4] is 'E'. i%2 is 0. The first if condition is false. The else if condition s[4]==s[5] ('E'=='S') is false.
• i = 5: s[5] is 'S'. i%2 is 1 (odd). s[5]!=s[6] ('S'!='S') is false. The first if condition is false. The else if condition s[5]==s[6] ('S'=='S') is true. So, s[6] becomes '!'. Then i++ is executed, making i become 6. The string is now "S@C!E!".
• i = 6: The loop increments i to 7. s[7] is the null terminator '\0'. The loop condition s[i]!='\0' is false, and the loop terminates.

The function finishes. The program then prints "Changed String" followed by the modified string.

Output:

Original StringSUCCESSHelloChanged StringS@C!E!