Variable Naming Conventions -- According to common C naming conventions, what should the name of a constant typically be?

All uppercase letters with underscores

Basic Output Function – printf -- What is the purpose of the `printf()` function in C?

To display output on the console

To perform mathematical calculations

Basic Output Function – printf -- What will be the output of `printf("Hello\nWorld");`?

`Hello` followed by `World` on a new line

Fundamental Data Types − Integer (Part 2) -- What is the purpose of the `unsigned` keyword with integer data types?

Increases the maximum positive range

Decreases the maximum positive range

Exceeding The Valid Range of Data Types -- What is "integer overflow" in C?

The integer value exceeds its maximum representable value

The integer value becomes negative

The integer value becomes a floating-point number

Exceeding The Valid Range of Data Types -- What can be a consequence of integer overflow in security-critical applications?

Vulnerabilities like buffer overflows

Fundamental Data Types − Float, Double & Long Double -- What is a potential issue when comparing two floating-point numbers directly for equality?

Precision errors can lead to unexpected results

It's much faster than integer comparison

C Programming (Important Questions Set 1) -- What is the primary difference between a declaration and a definition in C?

A definition allocates memory, a declaration does not.

A declaration allocates memory, a definition does not.

A declaration is always global, a definition is always local.

C Programming (Important Questions Set 1) -- What is the purpose of the `return 0;` statement at the end of the `main()` function?

Indicates successful program execution

Scope of Variables - Local vs Global -- Where can a global variable be accessed?

From any function in the program (if declared appropriately)

Only within the function it's declared in

Only within the file it's declared in

Scope of Variables - Local vs Global -- What is true about local variables?

Their lifetime is limited to the block or function where they are defined.

They persist throughout the program's execution.

They are initialized to zero by default.

They can be accessed from any file.

Scope of Variables - Local vs Global -- If a local variable and a global variable have the same name, which one takes precedence within the function?

Both are accessible via different syntax

Variable Modifiers − Auto & Extern -- What is the primary purpose of the `extern` keyword?

To indicate that a variable is defined in another file

To declare a variable that is initialized at runtime

To make a variable accessible only within a specific function

To force a variable to be stored in CPU registers

Variable Modifiers − Auto & Extern -- Can an `auto` variable be initialized explicitly?

Yes, they can be initialized with any valid expression.

No, they are always initialized to zero.

No, they are always initialized to garbage values.

Variable Modifiers − Register -- What is the purpose of the `register` storage class specifier?

To suggest to the compiler to store the variable in a CPU register for faster access

To store a variable in main memory

To make a variable globally accessible

To initialize a variable to zero automatically

Variable Modifiers − Register -- Can you take the address of a `register` variable using the `&` operator?

No, because they might not have a memory address

Only if it's a global register variable

Variable Modifiers − Register -- When is the `register` keyword most effective?

For variables used frequently in a loop

For variables that are rarely accessed

Variable Modifiers − Static -- What is the lifetime of a `static` local variable?

Throughout the program's execution

Until the block it's in finishes

Only for the current function call

Variable Modifiers − Static -- What does `static` keyword mean when applied to a global variable or function?

It restricts its visibility to the current file.

It makes it accessible from anywhere in the program.

It ensures it's stored in a CPU register.

Hitha C Quiz 1

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MULTIPLE CHOICE QUESTION

45 sec • 1 pt

C Programming – Features & The First C Program -- Which of the following is NOT a characteristic of C programming?

Machine-independent

High-level language

Primarily object-oriented

Structured programming language

Answer explanation

C is a procedural language and not primarily object-oriented, unlike C++ or Java.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

C Programming – Features & The First C Program -- What is the main function of the preprocessor directive `#include <stdio.h>`?

Links the standard input/output library

Defines a new function

Declares a global variable

Includes user-defined headers

Answer explanation

It includes the standard input/output header file, providing access to functions like `printf` and `scanf`.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

C Programming – Features & The First C Program -- What is the purpose of the `main()` function in a C program?

It's an optional function

It's the entry point of execution

It declares global variables

It handles error logging

Answer explanation

Program execution in C always begins from the `main()` function.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

C Programming – Features & The First C Program -- Which of the following is the correct way to end a C statement?

A colon (:)

A semicolon (;)

A period (.)

A comma (,)

Answer explanation

Every statement in C must end with a semicolon.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

C Programming – Features & The First C Program -- Which of the following is a key feature of C that allows direct memory manipulation?

Garbage collection

Pointers

Virtual memory

Polymorphism

Answer explanation

C's powerful pointer concept allows for direct memory access and manipulation.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Introduction to Variables -- What is a variable in C?

A fixed value that cannot be changed

A named storage location in memory

A function that performs a specific task

A predefined keyword in the language

Answer explanation

A variable is a symbolic name for a memory location used to store data.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Introduction to Variables -- Which of the following is a valid declaration of an integer variable in C?

`int 1num;`

`_int num;`

`int num;`

`integer num;`

Answer explanation

`int` is the correct keyword for an integer, and `num` is a valid identifier.

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Hitha C Quiz 1

C Programming – Features & The First C Program -- Which of the following is NOT a characteristic of C programming?

C is a procedural language and not primarily object-oriented, unlike C++ or Java.

C Programming – Features & The First C Program -- What is the main function of the preprocessor directive `#include <stdio.h>`?

It includes the standard input/output header file, providing access to functions like `printf` and `scanf`.

C Programming – Features & The First C Program -- What is the purpose of the `main()` function in a C program?

Program execution in C always begins from the `main()` function.

C Programming – Features & The First C Program -- Which of the following is the correct way to end a C statement?

Every statement in C must end with a semicolon.

C Programming – Features & The First C Program -- Which of the following is a key feature of C that allows direct memory manipulation?

C's powerful pointer concept allows for direct memory access and manipulation.

Introduction to Variables -- What is a variable in C?

A variable is a symbolic name for a memory location used to store data.

Introduction to Variables -- Which of the following is a valid declaration of an integer variable in C?

`int` is the correct keyword for an integer, and `num` is a valid identifier.

Introduction to Variables -- What is the initial value of a local variable if it's not explicitly initialized?

Local variables that are not explicitly initialized contain garbage values.

Variable Naming Conventions -- Which of the following is NOT a valid C identifier?

Identifiers in C cannot start with a digit.

Variable Naming Conventions -- Which character is commonly used to separate words in multi-word variable names in C (snake_case)?

The underscore is widely used in C for readability in variable names following snake_case.

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