FBISE, NCP & NBF-aligned resources for Classes 9–12
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Computer Chapter 3 : Topic 4.1
An algorithm is a set of instructions
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Which statement best describes the meaning of an algorithm in the context of programming and problem solving?
Reasoning: An algorithm is a step-by-step set of instructions designed to solve a problem or perform a task.
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In JavaScript programming, why is it important that an algorithm follows a specific logical sequence of steps?
Reasoning: Algorithms must follow sequence so that each step executes in correct order to produce accurate results.
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Which type of programming structure is used when instructions are executed one after another without any condition?
Reasoning: Sequence structure executes instructions step-by-step in a fixed order without decision making.
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Which control structure allows a program to make decisions based on whether a condition is true or false?
Reasoning: Selection uses conditions like if/else to decide which block of code should run.
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In JavaScript, which keyword is primarily used to implement decision-making in an algorithm?
Reasoning: The if statement is used to perform selection based on conditions.
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What will happen if a selection condition in an if statement evaluates to false in a JavaScript program?
Reasoning: If the condition is false, the code inside the if block is not executed.
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Which structure is best used when a task must be repeated multiple times until a condition becomes false?
Reasoning: Repetition (loops) is used when actions must be repeated based on a condition.
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Which JavaScript loop is most suitable when the number of repetitions is known in advance?
Reasoning: The for loop is used when iteration count is fixed or known.
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What is the main risk of writing a repetition structure incorrectly in an algorithm?
Reasoning: Incorrect loop conditions can cause infinite loops where execution never stops.
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Which statement best explains how sequence, selection, and repetition work together in an algorithm?
Reasoning: These three structures together form the foundation of algorithm design.
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In a JavaScript algorithm, what is the purpose of using an else statement with an if condition?
Reasoning: The else block runs when the if condition evaluates to false.
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Which loop structure guarantees that the code inside it will execute at least once before checking the condition?
Reasoning: do...while executes first, then checks the condition afterward.
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What is the correct interpretation of a step-by-step algorithm used in JavaScript programming?
Reasoning: Algorithms are structured logical steps to solve problems systematically.
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Which part of a loop controls whether the repetition continues or stops in JavaScript?
Reasoning: The loop condition determines whether the loop continues or terminates.
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What will be the effect of placing a break statement inside a loop in JavaScript?
Reasoning: break is used to exit a loop immediately when a condition is met.
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Which of the following best describes a real-world example of a selection structure in an algorithm?
Reasoning: Selection involves decision-making based on conditions such as user login status.
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Why is indentation and logical structure important when writing algorithms or JavaScript code?
Reasoning: Proper structure helps programmers understand flow and identify errors easily.
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Which of the following best explains how repetition improves efficiency in an algorithm?
Reasoning: Loops allow reuse of instructions, making programs shorter and more efficient.
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