Practice Questions For

ANS : (c) ROM (Read-Only Memory) is a type of non-volatile memory that retains its contents even when the power is turned off, unlike RAM (Random Access Memory), which is volatile.

ANS : (a) CPU stands for Central Processing Unit, which is the primary component of a computer that performs most of the processing inside a computer.

ANS : (d) Object-oriented programming is characterized by encapsulation, inheritance, and polymorphism.

ANS : (d) An operating system manages hardware resources, provides a user interface, and executes applications.

ANS : (c) Quick Sort has an average-case time complexity of O(n log n), making it more efficient than the other sorting algorithms listed.

ANS : (c) Accessing an element in a hash table is done in constant time, O(1), on average, due to the use of hash functions.

ANS : (d) Linear is not a recognized database model; Hierarchical, Network, and Relational are.

ANS : (b) TCP operates at the Transport Layer of the OSI model, providing reliable communication.

ANS : (a) 192.168.1.1 is a valid IPv4 address; the others exceed the maximum value for an octet.

ANS : (b) A compiler translates high-level programming languages into machine code.

ANS : (b) A queue follows the FIFO principle, meaning the first element added is the first one to be removed.

ANS : (d) The maximum depth of a binary tree can be n-1 when it is skewed.

ANS : (b) A linked list can grow and shrink in size dynamically.

ANS : (a) SQL stands for Structured Query Language, used for managing relational databases.

ANS : (d) All listed options (Virus, Worm, Trojan Horse) are types of malware.

ANS : (a) A router connects different networks and forwards data packets between them.

ANS : (b) Dijkstra's Algorithm is used to find the shortest path in a weighted graph.

ANS : (b) A firewall protects a network by monitoring and controlling incoming and outgoing traffic.

ANS : (d) All of the above are recognized programming paradigms.

ANS : (b) Linked lists can easily grow and shrink in size, while arrays have a fixed size.

ANS : (b) The "id" attribute is used to uniquely identify an HTML element, which can be used in CSS and JavaScript.

ANS : (b) The "alt" attribute provides a description of the image, which is important for accessibility, especially for screen readers.

ANS : (c) Flexbox is used to align and distribute space among items in a container, either horizontally or vertically.

ANS : (a) Responsive web design ensures that websites are designed to look good on all devices, regardless of their screen size.

ANS : (b) The "position" property in CSS is used to position an element relative to its normal position or to its parent element.

ANS : (a) "display: none" removes the element completely from the document flow, whereas "visibility: hidden" hides the element but still takes up space in the layout.

ANS : (b) JavaScript is primarily used to make websites interactive and dynamic by manipulating the HTML and CSS on the page.

ANS : (a) AJAX stands for Asynchronous JavaScript and XML, which allows for the asynchronous loading of data without refreshing the page.

ANS : (a) "let" allows reassignment of values, while "const" is used for values that cannot be reassigned after initialization.

ANS : (a) The "target='_blank'" attribute in a link ensures that the linked document opens in a new tab or window.

ANS : (a) The "box-sizing" property controls how the total width and height of an element is calculated, including padding and border.

ANS : (a) "==" compares only the values of variables, while "===" compares both the value and the data type.

ANS : (b) The "z-index" property specifies the stack order of elements, allowing you to control which element appears on top of others.

ANS : (a) JSON stands for JavaScript Object Notation and is a lightweight data interchange format that is easy for humans to read and write.

ANS : (a) SQL stands for Structured Query Language, which is used for managing and manipulating relational databases.

ANS : (a) "null" represents the intentional absence of any object value, while "undefined" means a variable has been declared but has not been assigned a value.

ANS : (a) The "overflow" property in CSS controls how content is displayed when it overflows the bounds of its container.

ANS : (a) The "box-shadow" property adds a shadow effect around an element's frame.

ANS : (a) In responsive web design, the "viewport" refers to the visible area of a web page on the screen, adjusting for different screen sizes.

ANS : (a) The "async" attribute allows a script to be executed asynchronously, enabling the page to load without waiting for the script.

ANS : (b) The "alt" attribute specifies alternative text to display when an image cannot be shown, improving accessibility.

ANS : (a) The "flex" property in CSS allows elements to grow and shrink according to the available space in a flex container.

ANS : (a) Event delegation involves handling events on a parent element rather than individual child elements, improving performance and manageability.

ANS : (a) "localStorage" persists data even after the browser is closed, while "sessionStorage" stores data for the duration of a single session.

ANS : (a) The "async" attribute allows the script to load and execute asynchronously, without blocking the parsing of the HTML document.

ANS : (a) The "transition" property in CSS allows for smooth transitions between changes in element properties over a specified duration.

ANS : (a) A RESTful API uses HTTP methods (GET, POST, PUT, DELETE) to perform CRUD operations on resources (data objects).

ANS : (a) The "async/await" pattern allows asynchronous code to be written in a synchronous style, making it easier to handle asynchronous operations.

ANS : (c) The "clear" property in CSS prevents floating elements from overlapping by ensuring the cleared element is below floating content.

ANS : (a) The "box-sizing" property determines how the total width and height of an element are calculated, including padding and border.

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