Podcast
Questions and Answers
What will be the output of the given code if the variable D is set to 70?
What will be the output of the given code if the variable D is set to 70?
- D < 75
- No output
- D >= 65
- D is in the range (correct)
What is the result of the logical expression used in the if statement with D equal to 70?
What is the result of the logical expression used in the if statement with D equal to 70?
- Undefined
- Error
- True (correct)
- False
If D is set to 60, what will the output of the code be?
If D is set to 60, what will the output of the code be?
- D >= 65
- D < 75
- D is in the range
- No output (correct)
What will happen if the code has an incorrect use of parentheses, such as 'if((D >= 65) && D < 75)?'
What will happen if the code has an incorrect use of parentheses, such as 'if((D >= 65) && D < 75)?'
What modification would prevent the output if D is set to any value less than 65?
What modification would prevent the output if D is set to any value less than 65?
Flashcards
if-else statement
if-else statement
An if-else statement executes one block of code based on whether a condition is true or false. This code snippet checks if the value of 'D' meets a certain criteria between 65 and 75.
Range Check
Range Check
The code snippet checks if the variable 'D' falls within a specific range. It uses the operators '>=' (greater than or equal to) and '<' (less than) to compare the value of 'D' against the specified boundaries.
Logical AND (&&)
Logical AND (&&)
The code snippet uses the '&&' operator to check if both conditions are true. It's like asking, "Is 'D' both greater than or equal to 65 AND less than 75?" Only if both are true will the code inside the 'if' block execute.
Condition Evaluation
Condition Evaluation
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Conditional Statement
Conditional Statement
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Study Notes
Question 1 (Multiple Choice)
- Question Type: Choose the correct answer from a given set of options.
- Topic Covered in Question 1: C++ programming, output of code snippets, arithmetic and logical operations in C++.
- Key Facts: The questions involve the evaluation of code fragments, including statements involving
ifstatements (if/elsestructure),forloops,whileloops, variable assignment, and output. These code examples address basic C++ syntax, control flow (while/for), output formatting, variable declarations/initializations, and arithmetic calculations (integer and floating-point).
Question 2 (Coding)
- Topic Covered: Creating a program to determine if an integer is prime.
- Key Concept: Prime number definition: A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. Prime numbers are only divisible by 1 and themselves.
- Programming Logic: The program needs to take an integer input, check divisibility from 2 up to the input number itself. If it is divisible by a number other than 1 and itself, it is not prime.
Question 3 (Conversion)
- Topic Covered: Converting a
whileloop to ado-whileloop. - Key Concepts: Different loop structures in C++ (while, do-while, and for); these loops are structures to repeat code blocks while a condition remains true.
- Logic: The conversion changes the location of the loop condition, allowing the block of code within the loop to execute at least once.
Question 4 (Coding)
- Topic Covered: Drawing a chessboard pattern using C++ output.
- Key Concept: Using nested loops for iteration and conditional statements to structure patterns; Character representation \u2588 represents a chessboard square.
- Pattern: The program creates an 8x8 board using a nested for loop. Alternating squares are filled with either the character string “\u2588\u2588\u2588” (3 \u2588 characters) or 3 spaces depending if the square is black or not.
- Output: The code should create a chessboard pattern on the console.
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