Computational Thinking and Programming-I Quiz 8

✅ Answer: (a) if-else statement

Strictly speaking, a plain if statement (with no else) is the one that runs code only when a condition is true — but that exact option wasn’t in the original quiz’s choices. Of the four given, if-else is the closest match since it’s still a conditional (not a loop) construct built around a true/false check. (This question is corrected/clarified from the original, which was missing the precise “if statement” option entirely.)

✅ Answer: (a) To execute one block of code when a condition is true, and a different block when it’s false

An if-else statement always executes exactly one of two blocks — the if block when the condition is true, or the else block when it’s false. (This option has been corrected/clarified from the original quiz, which only described the “true” branch and left out the “else” half of the behaviour.)

✅ Answer: (c) To test multiple conditions in order and run the block for whichever one is true first

if-elif-else lets you test several conditions in sequence — Python checks them top to bottom and runs the block for the first one that’s true, then skips the rest entirely.

✅ Answer: (a) A diagram that represents the flow of control in a program

A flowchart visually maps out the flow of control — the sequence of steps, decisions, and loops a program follows — using standardized shapes connected by arrows.

✅ Answer: (a) Representing the logical structure of a program

Flowcharts help visualize and plan the logical structure of a program before (or while) writing code — making the algorithm’s decisions and steps easy to review and communicate.

✅ Answer: (a) Rectangle

A rectangle represents a process or operation step in a flowchart — like a calculation or an assignment.

✅ Answer: (b) Diamond

A diamond shape represents a decision point in a flowchart — where the flow branches based on a Yes/No or True/False condition.

✅ Answer: (d) A program that converts a negative number to positive (or leaves a positive number unchanged)

An absolute value program strips away the sign of a negative number (turning it positive) while leaving a positive number exactly as it is — typically done with if num < 0: num = -num.

✅ Answer: (d) A program that arranges three numbers from smallest to largest

Sorting three numbers in ascending order means rearranging them so the smallest comes first and the largest comes last — commonly done with nested if-else comparisons or Python's built-in sorted().

✅ Answer: (d) A program that uses the modulus operator to test for a zero remainder

Checking divisibility is done using the modulus operator (%) — if a % b == 0, then a is exactly divisible by b, with no remainder.

✅ Answer: (a) “Number is divisible by 5”

15 % 5 gives a remainder of 0, so the condition is true and the program prints “Number is divisible by 5”. (This question is corrected from the original, which asked for “the output” without ever giving an actual number or code to work with — impossible to answer as originally written.)

✅ Answer: (b) 7

Since -7 is less than 0, the condition is true and num becomes -(-7) = 7. (Corrected from the original, whose options were vague phrases like “the positive of the original number” rather than an actual computed value — this version uses a real number so it can be solved.)

✅ Answer: (b) [3, 5, 8]

sorted() arranges the list in ascending order: [3, 5, 8]. (Corrected from the original, which asked for “the output” of a sorting program without providing any actual numbers to sort.)

✅ Answer: (a) ==

== (double equals) checks equality. A single = is reserved for assignment only — mixing the two up is one of the most common beginner mistakes.

✅ Answer: (a) !=

!= checks that two values are different. It's the direct opposite of ==.

✅ Answer: (b) “Odd”

This is a conditional (ternary) expression — a one-line shorthand for if-else. Since 5 % 2 is 1 (not 0), the condition is false, so the expression evaluates to “Odd”.

✅ Answer: (a) True

Python allows chained comparisons — this checks both 1 < 5 and 5 < 10 at once. Since both are true, the whole expression evaluates to True.

✅ Answer: (c) Only the FIRST matching branch (top to bottom) runs, and the rest are skipped

Python checks conditions top to bottom and stops at the first one that's true — running only that branch's code, even if a later condition would also have been true. This is why elif conditions are usually ordered from most specific to least specific.

✅ Answer: (b) An if statement placed inside another if statement's block

A nested if is an if statement written inside the block of another if statement — used when a decision only needs to be checked after an outer condition has already been satisfied.

✅ Answer: (c) Oval / Rounded shape

An oval (or rounded/terminator) shape marks the start and end of a flowchart — the rectangle is for processes, the diamond for decisions, and the parallelogram is typically used for input/output steps.