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Computer Programming Articles
Page 4 of 18
What is techniques of storage allocation in compiler design?
There are various storage allocation techniques are as follows −Static AllocationIt is the simplest allocation scheme in which allocation of data objects is done at compile time because the size of every data item can be determined by the compiler.Recursive Subprogram and Arrays of adjustable length are not permitted in a language. In static allocation, the compiler can decide the amount of storage needed by each data object. Thus, it becomes easy for a compiler to identify the address of these data in the activation record.FORTRAN uses this kind of storage allocation strategies.AdvantagesIt is easy to implement.It allows type checking ...
Read MoreWhat is Syntax Tree?
Tree in which each leaf node describes an operand & each interior node an operator. The syntax tree is shortened form of the Parse Tree.Example1 − Draw Syntax Tree for the string a + b ∗ c − d.Rules for constructing a syntax treeEach node in a syntax tree can be executed as data with multiple fields. In the node for an operator, one field recognizes the operator and the remaining field includes a pointer to the nodes for the operands. The operator is known as the label of the node. The following functions are used to create the nodes ...
Read MoreDifference between System Call and Library Call
In computer programming, system calls and library calls are essential mechanisms used to interact with the underlying operating system and perform various operations. While they both involve invoking functions or routines, there are distinct differences between system calls and library calls. Understanding these differences is crucial for developers to efficiently utilize these mechanisms in their applications. This article explores the dissimilarities between system calls and library calls, shedding light on their respective characteristics and functionalities. What is System Call? A system call is a mechanism provided by the operating system that allows user-level programs to request services from the operating ...
Read MoreDifference between Encoder and Decoder
A combinational circuit is one that contains logic gates. Encoders and decoders are such combinational circuits in which one changes the input data into binary code and the other one decodes it to its original input signal. Both encoders and decoders are multiple input and multiple output devices Encoding allows the input signal to function on various systems. For instance, when we search something in the web browser, it is converted into a binary code (encoding) which can be understood by it then search for it and send the results back to the user by converting the binary form into ...
Read MoreDifference Between Keyword and Identifier
Every programming language has keywords and identifiers. Both keywords and identifiers can be processed by a compiler, however they are quite different from each other. The basic difference between the two is that keywords are the reserve words which are predefined and have a special meaning in the language, whereas an identifier is a unique name assigned to a variable, function, class, etc. Read this article to learn more about keywords and identifiers and how they are different from each other. What is a Keyword? Keywords are reserved words that have a special meaning in a programming language. Therefore, we ...
Read MoreDifference Between Identifier and Variable
An Identifier is a name assigned to an entity in a computer program so that it can be identified distinctly in the program during its execution. On the other hand, a variable is a name assigned to a memory location that stores a value. Read this article to learn more about identifiers and variables and how they are different from each other. What is an Identifier? Identifiers are used to name a variable, a function, a class, a structure, a union. In other words, an identifier is created to give a unique name to an entity. It can consist of ...
Read MoreDifference between Header file and Library
In C, C#, Java or any other programming language, both header files and libraries provide some specific APIs and their functionality to be used in the main file. Both the header file and the library are combined and used as a single unit. But, on the basis of nature of files, we can distinguish between a Header File and a Library. Read this tutorial to learn more about header files and libraries and how they are different from each other. What is a Header File? The file that contains all the header names which are to be used in the ...
Read MoreDifference Between Array and Structure
Arrays and Structures are two different types of container datatype. The most basic difference between an array and a structure is that an Array can contain the elements of same datatype, while a Structure is a collection that can contain the elements of dissimilar datatypes. Read this article to learn more about Arrays and Structures and how they are different from each other. What is an Array? An array refers to a collection that consists of homogenous elements, i.e. of same data type. Arrays are declared using '[]'. It uses subscripts/ '[ ]' (square brackets) to access the elements. An ...
Read MoreDifference Between Array and Linked List
The basic difference between an array and a linked list is in their structure. An array relies on the index-based data structure, whereas a liked list is based on the references. Read this article to find out more about Arrays and Linked Lists and how they are different from each other. What is an Array? An array is a consistent set of fixed number of data items. Array stores elements in contiguous memory locations. This means the specific elements can be accessed using easily calculable addresses. Hence, an array provides fast access to find element at a specific index. Another ...
Read MoreDifference Between Verification and Validation
Verification is the process of verifying something to ensure its correctness, while Validation is the process of validating something in which the user tests the system with some inputs and verifies whether the output is as per the expectation or not. In software testing, both Validation and Verification are the parts of the V-model in which the development and testing activities are started based on the requirement of document specification. In other words, we can say that Verification is the process to ensure whether the product that is developed is right or not. It verifies whether the developed product fulfils ...
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