Podcast
Questions and Answers
What are the two categories of control statements in C?
What are the two categories of control statements in C?
- Branching Statements and Looping Statements (correct)
- Selection Statements and Repetition Statements
- Conditional Statements and Iterative Statements
- Jump Statements and Function Statements
What is the purpose of an array?
What is the purpose of an array?
- To store different data types in a single variable
- To randomly access elements using their memory addresses
- To represent many instances of data with a logical relation among them (correct)
- To store a single data type in multiple variables
What is a characteristic of an array?
What is a characteristic of an array?
- Elements can be of different data types
- Elements are stored in contiguous memory locations (correct)
- Elements can be accessed using their memory addresses
- Size can be changed at run-time
What is the indexing technique used to access elements in an array?
What is the indexing technique used to access elements in an array?
Which of the following is NOT a characteristic of an array?
Which of the following is NOT a characteristic of an array?
What is the range of indices in an array?
What is the range of indices in an array?
What is the use of 'if' and 'switch' statements in C?
What is the use of 'if' and 'switch' statements in C?
How many characteristics does an array have?
How many characteristics does an array have?
What is the primary advantage of arrays in terms of access time?
What is the primary advantage of arrays in terms of access time?
How can an array be declared in C?
How can an array be declared in C?
What is the purpose of the variables vector in array declaration?
What is the purpose of the variables vector in array declaration?
What is the formula to access an element in a one-dimensional array?
What is the formula to access an element in a one-dimensional array?
What is the consequence of not having index out of bounds checking in C?
What is the consequence of not having index out of bounds checking in C?
How are multi-dimensional arrays declared in C?
How are multi-dimensional arrays declared in C?
What is the equation to access an element in a two-dimensional array?
What is the equation to access an element in a two-dimensional array?
What is the allocation of the array in memory?
What is the allocation of the array in memory?
Study Notes
Control Statements in C
- There are two categories of control statements in C: Branching Statements and Looping Statements
- Branching Statements include if statement and switch statement
- Looping Statements include for statement, while statement, and do..while statement
Arrays in C
- An array is a collection of items stored at contiguous memory locations
- Elements can be accessed randomly using indices of an array
- All elements in an array must be of the same data type
- Arrays can store primitive data types (int, float, double, char, long) or complex data types (structures, arrays)
- Seven characteristics of arrays:
- Homogeneous: All elements have the same data type
- Fixed size: The size of the array cannot be changed at runtime
- Contiguous: All elements are allocated in contiguous memory locations
- Indexed: Uses indexing technique to access any element
- Ordered: Elements are ordered
- Finite (Limited): Any array has a first and last place
- Random or Direct Access: Time consumed to reach any element is constant
Array Declaration in C
- Arrays can be declared by specifying its type and size, by initializing it, or both
- Syntax:
Data_Type Array_Name [Array_Size];
orData_Type [Array_Size] Array_Name;
Array Storage in Memory
- The compiler generates a Variables Vector to declare and store variables
- The allocation of the array in memory starts from the base address with a length equal to the number of elements multiplied by the element size
- The equation to access any element of the array is:
address of element with index I = base address + I X element size
Two-Dimensional Arrays
- A two-dimensional array is declared as
Data_Type Array_Name [Dim1_Size][Dim2_Size];
- The equation for the two-dimensional array is:
address of element with index A, B = base address + A X Dim2_Size X data_element_size + B X data_element_size
- Multi-indices are used to access array elements, with each level of index representing a dimensional level
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Description
This quiz covers the control flow statements in C programming, including branching statements like if and switch, and looping statements like for, while, and do-while.