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Quizzes > High School Quizzes > English Language Arts

C K Worksheets Practice Quiz

Sharpen your knowledge with interactive practice tests

Difficulty: Moderate
Grade: Other
Study OutcomesCheat Sheet
Paper art depicting trivia quiz for high school students testing C programming knowledge

What is the purpose of a semicolon in C programming?
It is used to separate function parameters
It indicates the beginning of a block
It marks the end of a statement
It comments out code
A semicolon is used in C programming to denote the end of a statement. Without it, the compiler cannot determine where one instruction ends and another begins.
What does the int keyword represent in C?
A character array
A floating point number
An integer data type
A function return type
The int keyword in C declares a variable as an integer data type, which is used to store whole numbers. It is a fundamental data type for arithmetic operations.
What is the function main() primarily used for in a C program?
It defines user-defined functions
It declares global variables
It prints output to the console
It serves as the entry point of the program
The main() function is where the execution of a C program begins and is essential for initializing the program's logic. It acts as the starting point and often returns a status code to the operating system.
Which operator is used to perform addition in C?
The / operator
The + operator
The - operator
The * operator
The plus sign (+) operator in C is used to add two numbers together. It is one of the basic arithmetic operators fundamental to programming logic.
What file extension is typically used for C source code files?
.py
.cpp
.java
.c
C source code files conventionally use the .c extension, which distinguishes them from files written in other programming languages. This standardization helps compilers recognize the type of source code being processed.
How do you declare a floating-point variable in C?
float variableName;
char variableName;
int variableName;
double variableName;
Declaring a floating-point variable in C is done using the float keyword, which designates a variable to hold decimal numbers. This differs from the int type, which is only used for whole numbers.
How do you write a single-line comment in C?
Using // before the comment
Using /* */
Using ##
Using --
In C programming, single-line comments are initiated with //, instructing the compiler to ignore the text that follows on that line. Although /* */ can be used for comments, it is typically reserved for multi-line comments.
What does the return statement do in the main function of a C program?
It declares a global variable
It creates a new function
It ends the function and returns a value to the operating system
It prints a value to the screen
The return statement in the main function terminates its execution and sends a status code back to the operating system, typically 0 if the program executed successfully. This return value is a conventional method to indicate how a program completed.
What is the key difference between the equality operator (==) and assignment operator (=) in C?
== compares values, while = assigns a value
== assigns a value, while = compares values
== is used for addition operations
Both operators perform the same function
The equality operator (==) is used to compare two values to determine if they are identical, while the assignment operator (=) sets a variable to a particular value. Recognizing the distinction between these two operators is crucial for writing correct C code.
Which loop structure in C is most commonly used when the number of iterations is known?
if statement
for loop
while loop
do-while loop
A for loop is ideal for situations where the number of iterations is predetermined because it combines initialization, condition checking, and incrementing in one concise statement. This helps in writing clean and efficient loops with a known iteration count.
How do you declare a constant named VALUE in C?
const int VALUE = 10;
int VALUE = constant 10;
constant int VALUE = 10;
#define VALUE int 10;
Declaring a constant in C is performed with the const keyword, as seen in 'const int VALUE = 10;'. This ensures that the value of VALUE remains unchanged throughout the program, which is important for values that should not be modified.
What is the main purpose of the stdio.h header file in C?
To handle mathematical functions
To provide functionalities for input and output operations
To manage string operations
To support memory allocation
The stdio.h header file contains declarations for standard input and output functions such as printf and scanf. It is an essential component in most C programs for handling basic I/O operations.
Which of the following is a correct syntax for an if statement in C?
if (condition): code end if
if(condition) { /* code */ }
if [condition] then { code }
if condition { // code }
The proper syntax for an if statement in C requires the condition to be enclosed in parentheses, and the associated code block to be enclosed in curly braces. This format ensures that the condition is evaluated correctly and that the intended block of code executes if the condition is true.
Why are header files included in C programs?
They provide declarations for functions and macros used in the program
They are used to compile the program
They store the entire program code
They optimize the program's runtime
Header files in C supply the necessary declarations for functions, macros, and types that are used across different parts of a program. Including them ensures that the compiler is aware of these elements, allowing the program to compile and link correctly.
Which operator is used to access the value pointed to by a pointer in C?
The -> operator
The % operator
The & operator (address-of operator)
The * operator (dereference operator)
The * operator is used to dereference a pointer, which means accessing the value stored at the memory location that the pointer references. Mastering pointer operations like this is essential for effective memory management in C.
Which function in C dynamically allocates uninitialized memory of a specified number of bytes?
malloc()
free()
calloc()
realloc()
The malloc() function is used to allocate a specified amount of uninitialized memory and returns a pointer to it. Unlike calloc(), which initializes the memory to zero, malloc() leaves the memory with indeterminate values.
What is pointer arithmetic in C?
It allows arithmetic operations on pointers that automatically account for the data type size
Pointer arithmetic is illegal in C and always results in an error
It involves multiplying the address value stored in a pointer by an integer
It converts pointers to integers for arithmetic calculations
Pointer arithmetic in C allows the addition or subtraction of an integer to a pointer, adjusting the pointer by a number of elements based on the size of its data type. This feature is particularly useful when iterating through arrays.
What is a segmentation fault in C?
A warning that does not affect program execution
An error triggered when a program attempts to access an invalid memory location
A specialized function for memory segmentation
A compiler error during segmentation of code
A segmentation fault occurs when a program tries to access memory that it is not permitted to access, often due to dereferencing null or uninitialized pointers. This error typically results in the program being terminated by the operating system to protect system integrity.
How does the switch-case control structure differ from multiple if-else statements in C?
Switch-case is more efficient for comparing a single variable against multiple constant values
Switch-case executes all cases regardless of matching
Switch-case can evaluate complex conditions like ranges
Switch-case does not require break statements
The switch-case structure is optimized for comparing a single variable against various constant values, often making it more efficient than a series of if-else statements when dealing with many options. Each case typically requires a break statement to prevent fall-through, unless that behavior is deliberately desired.
What is the purpose of the volatile keyword in C?
It converts a variable to a constant
It ensures that the variable is only read and not written to
It declares a variable that is stored in faster memory
It tells the compiler that a variable's value may change unexpectedly, preventing certain optimizations
The volatile keyword informs the compiler that the value of a variable may change at any time without any action being taken by the code the compiler finds nearby. This prevents the compiler from applying certain optimizations that might assume the value remains constant between accesses.
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Study Outcomes

  1. Analyze core C programming syntax and structure.
  2. Apply control flow constructs, such as loops and conditionals, in practical scenarios.
  3. Evaluate the usage of data types and variable declarations in code.
  4. Interpret the implementation of functions and modular code design.
  5. Debug common programming errors and logical flaws in C routines.
  6. Create simple programs that demonstrate foundational C concepts.

C K Worksheets Practice Test Cheat Sheet

  1. Understand Data Types and Variables - Dive into C by mastering int, float, char, and double - the core ingredients for storing numbers and characters. Proper declaration and initialization help you avoid nasty surprises and keep your memory tidy. Embrace these basics to build rock‑solid programs! GeeksforGeeks C Basics
  2. Master Control Structures - Loop through tasks with for, while, and do-while, and make decisions using if, else, and switch. These flow‑control heroes let you repeat actions, branch logic, and create dynamic programs. Think of them as your program's GPS! Master Control Structures
  3. Explore Functions - Break down big tasks into bite‑sized pieces by writing your own functions. Learn how to declare, define, and call these reusable code blocks so your projects stay organized. Modular code means easier debugging and faster project growth! Modular Functions Guide
  4. Dive into Arrays and Strings - Handle collections of data and text like a pro by declaring, initializing, and manipulating arrays and strings. From simple number lists to complex text processing, these structures are your best friends. Get ready to slice, dice, and concatenate with confidence! Arrays & Strings in C
  5. Understand Pointers - Think of pointers as treasure maps that point to memory addresses; they unlock powerful capabilities in C. Use them to navigate dynamic arrays, pass big data efficiently, and build complex structures. Mastering pointers is like gaining a cheat code to the language! Pointer Tutorial
  6. Grasp Dynamic Memory Allocation - Level up your programs by allocating and freeing memory at runtime with malloc(), calloc(), realloc(), and free(). This lets you handle data of unknown size and keep your applications lean. Just remember: every allocation needs a matching free! Dynamic Memory in C
  7. Learn About Structures and Unions - Organize related data under one roof with structures, and experiment with unions to share memory between different fields. These composite types help you model real‑world entities with ease. They're perfect for building custom data types and simplifying complex programs! Structures & Unions
  8. Study File Handling - Unlock the power of persistent storage by reading from and writing to files using fopen(), fread(), fwrite(), and fclose(). Whether you're logging scores or saving settings, file I/O is essential for real‑world applications. Time to make your programs remember things! C File I/O
  9. Understand Preprocessor Directives - Learn how #include, #define, and conditional compilation directives shape your code before it even compiles. Use macros for handy shortcuts and guard headers against multiple includes. Preprocessors are like backstage crew - quiet but crucial! Preprocessor Directives
  10. Practice Error Handling - Build robust C programs by checking return values, using perror() and strerror(), and defining clear error codes. Proactive error checks save you from mysterious crashes and data corruption. Embrace good habits now, thank yourself later! Error Handling in C
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