C Programming Basics Quiz

Question One

• a) Components of a C Program

  • Statements: Instructions that perform specific tasks in a program.
  • Reserved Words: Keywords with predefined meaning in the C language, like int, float, if, and else.
  • Comments: Explanations within the code to clarify its purpose or functionality, typically ignored by the compiler.

• b) Loop Output

  • The loop will output the values of i from 0 to 9.
  • Initial value of i = 0
  • Final value of i = 9

Question Two

• c) i) C Program for Output

  • A C program using a for loop to display numbers from 1 to 10, outputting 1,2,3,4,5,7,8,9,10 to console.

• c) ii) Differences Between while and do-while loops

  • The key difference is the placement of the condition.
  • while loop checks the condition first, so the code inside the loop might not execute even once if the condition is false to begin with.
  • do-while loop executes the code inside the loop at least once, and then checks the condition.

• c) iii) Sum and Mean of Odd Numbers

  • A program which calculate the sum and mean of all odd numbers between 0 and 20 using while.

• d) i) When to use void in Functions

  • The void keyword is used in functions to indicate that the function does not return any value to the caller.

• d) ii) Program Output and Explanation

  • The program will print "5, 4" to the console. The function fun modifies the original variables passed to it by reference, changing the values inside main as well.

Question Three

• a) CATs Marks Table

  • A table containing CATS marks of 4 students.

• a) i) Static Initialization of an Array

  • Statement to initialize an array catmarks with the student's marks from the table.

• a) ii) Results of Expressions (using catmarks and carscores)

  • Mathematical expressions in respect to the catmarks and carscores arrays are calculated to determine if statements are true or false.

• a) iii) Smallest Element in Array

  • Loop to find the smallest element in a 100-element integer array data.

• b) Array Operations

  • i) Declaring Array alpha of 17 integers.
  • ii) Outputting Component Output the 12th element of alpha.
  • iii) Setting Value Setting the 5th element of alpha to 35.
  • iv) Setting Value Calculating the sum of the 6th and 13th element in alpha and setting the 9th element to the sum.
  • v) Setting Value Setting the 4th element to 3 times the 8th element minus 57.
  • vi) Outputting Array Output alpha with 5 elements per row.

Question Four

• a) Control Structures in C

  • i) if...else Statement: Syntax for conditional statements.
  • ii) for statement: Syntax for loops.
  • iii) case statement: Syntax for using switch statement.

• b) i) Converting while to for loop

  • Convert the provided while loop into an equivalent for loop.

• b) ii) Evaluating Expressions

  • Evaluate the truthfulness or falsity of various boolean expressions based on integer variables x, y,, and `z.

Question Five

• a) Loop Execution Counts

  • The code calculates how many times loop bodies are executed during various loops.

• b) File Opening Modes

  • Explanation of various file opening modes in C, including r, a, w+, and a+.

• c) Program Output

  • Output of a C program with a while loop that prints specific values to console.

Test your knowledge on the components of a C program, including statements, reserved words, and comments. Additionally, explore loops with questions on the differences between 'while' and 'do-while' loops and their outputs.