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Developer Ultimate Exam
Question 1. Which HTML element is most appropriate for marking up a navigation menu? A) B) C) D) Answer: B Explanation: The element semantically represents a set of navigation links, improving SEO and accessibility. **Question 2. In an HTML5 document, which declaration must appear at the very top?** A) B) C) D) Answer: B Explanation: tells browsers to render the page in standards mode. Question 3. Which attribute is required to associate a with an element? A) for B) id C) name D) type Answer: A
Developer Ultimate Exam
Explanation: The for attribute value must match the input’s id, linking them for accessibility. **Question 4. To embed an SVG graphic directly in HTML, which tag is used? ** A) B) C) D) Answer: B Explanation: `` allows inline SVG markup, enabling styling and scripting. Question 5. Which CSS selector has the highest specificity? A) ul li a B) .menu-item C) #main-nav D) a:hover Answer: C Explanation: ID selectors (#main-nav) outrank class and element selectors in specificity hierarchy. Question 6. What is the default value of the CSS box-sizing property? A) border-box B) content-box C) padding-box D) margin-box Answer: B
Developer Ultimate Exam
Explanation: Custom properties (CSS variables) are defined with --name and accessed via var(--name). Question 10. Which JavaScript keyword creates a block-scoped variable that cannot be reassigned? A) var B) let C) const D) static Answer: C Explanation: const declares a read-only binding; the variable identifier cannot be reassigned. Question 11. What will the following code output? let x = 0; console.log(x++); A) 0 B) 1 C) NaN D) undefined Answer: A Explanation: Post-increment returns the original value before incrementing. Question 12. Which array method creates a new array containing only the even numbers from the original? A) filter() B) map() C) reduce() D) forEach()
Developer Ultimate Exam
Answer: A Explanation: filter() tests each element and returns a new array of elements that pass the test. Question 13. What does the async keyword before a function declaration indicate? A) The function runs in a separate thread B) The function returns a Promise automatically C) The function cannot use await D) The function is executed immediately upon definition Answer: B Explanation: An async function always returns a Promise, allowing await inside it. Question 14. Which of the following statements about the JavaScript event loop is true? A) Microtasks are processed after the next macro task B) Macro tasks run before microtasks in each tick C) Microtasks are processed before the next macro task D) The event loop only handles UI events, not promises Answer: C Explanation: After a macro task, the engine empties the microtask queue before proceeding. Question 15. Which DOM method is used to attach an event listener to a button with id submitBtn? A) document.getElementById('submitBtn').addEvent('click', handler); B) document.querySelector('#submitBtn').on('click', handler);
Developer Ultimate Exam
A) @Injectable B) @Component C) @Directive D) @Pipe Answer: B Explanation: @Component marks a class as an Angular component and provides its metadata. Question 19. Which CSS technique implements a “mobile-first” responsive design? A) Writing media queries for large screens only B) Using max-width media queries after the base styles C) Using min-width media queries to progressively enhance layout D) Relying on JavaScript to resize elements Answer: C Explanation: Mobile-first starts with default styles for small screens, then adds min-width queries for larger viewports. Question 20. Which optimization technique reduces the initial load time of images on a web page? A) Embedding images as base64 strings in CSS B) Using srcset and sizes attributes for responsive images C) Loading all images synchronously in the `` D) Using high-resolution images for every device Answer: B Explanation: srcset lets the browser select appropriately sized images, decreasing payload.
Developer Ultimate Exam
Question 21. Which Node.js module provides utilities for working with file paths? A) fs B) http C) path D) url Answer: C Explanation: The path module offers methods like join, resolve, and basename. Question 22. In an Express.js application, which method registers middleware that runs for every incoming request? A) app.get() B) app.use() C) app.post() D) app.route() Answer: B Explanation: app.use() adds middleware to the request handling pipeline for all HTTP verbs. Question 23. Which HTTP status code indicates that the client must authenticate to gain network access? A) 401 B) 403 C) 404 D) 407 Answer: D
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Answer: B Explanation: HAVING applies conditions to aggregated groups, whereas WHERE filters before grouping. Question 27. Which normal form eliminates transitive dependencies? A) First Normal Form (1NF) B) Second Normal Form (2NF) C) Third Normal Form (3NF) D) Boyce-Codd Normal Form (BCNF) Answer: C Explanation: 3NF removes transitive dependencies, ensuring non-key attributes depend only on the primary key. **Question 28. Which SQL keyword adds a new column to an existing table? ** A) INSERT B) UPDATE C) ALTER TABLE … ADD D) CREATE COLUMN Answer: C Explanation: ALTER TABLE table_name ADD column_name datatype; modifies the table schema. Question 29. In MongoDB, which data type stores binary JSON (BSON) objects? A) ObjectId B) Binary C) Array
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D) Document Answer: B Explanation: The Binary type holds raw binary data within BSON documents. Question 30. Which Mongoose method creates a new document and saves it in one step? A) new Model() B) Model.create() C) Model.insertOne() D) Model.save() Answer: B Explanation: Model.create(doc) both constructs and persists the document. Question 31. What does the SQL JOIN type LEFT OUTER JOIN return? A) Only rows that match in both tables B) All rows from the right table and matching rows from the left C) All rows from the left table and matching rows from the right D) Rows that do not match in either table Answer: C Explanation: LEFT OUTER JOIN keeps all left-table rows, inserting NULLs for non-matching right rows. Question 32. Which of the following statements about SQL injection prevention is correct? A) Escaping user input with htmlspecialchars is sufficient B) Using prepared statements with parameter binding mitigates the risk
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A) title B) alt C) srcset D) role Answer: B Explanation: The alt attribute provides descriptive text when the image cannot be seen. Question 36. In ARIA, which role should be applied to a custom button element built with a ``? A) role="navigation" B) role="button" C) role="link" D) role="menu" Answer: B Explanation: role="button" informs assistive technologies that the element behaves like a button. Question 37. Which CSS property ensures that focus outlines are visible for keyboard navigation? A) outline: none; B) visibility: hidden; C) focus-visible pseudo-class D) display: none; Answer: C Explanation: The :focus-visible pseudo-class can be used to style focus only when it is appropriate (e.g., keyboard navigation).
Developer Ultimate Exam
Question 38. Which Git command creates a new branch named feature/login and switches to it? A) git checkout -b feature/login B) git branch feature/login C) git switch feature/login D) git merge feature/login Answer: A Explanation: git checkout -b both creates and checks out the new branch. Question 39. Which Git workflow command is used to integrate changes from a remote repository into the current branch? A) git push B) git fetch C) git pull D) git clone Answer: C Explanation: git pull fetches and merges remote changes into the current branch. Question 40. In Docker, which file defines the image build instructions? A) docker-compose.yml B) Dockerfile C) docker.json D) Containerfile Answer: B Explanation: A Dockerfile contains the steps for building a Docker image.
Developer Ultimate Exam
Question 44. In a typical Express route handler, which parameter represents the parsed request body? A) req.params B) req.query C) req.body D) req.headers Answer: C Explanation: req.body contains data parsed by body-parsing middleware (e.g., express.json()). Question 45. Which HTTP method is idempotent and typically used to update a resource partially? A) POST B) GET C) PATCH D) DELETE Answer: C Explanation: PATCH applies partial modifications and can be repeated safely without additional side effects. Question 46. Which of the following is a benefit of using CSS custom properties over preprocessor variables? A) They are compiled at build time B) They can be changed at runtime via JavaScript C) They require a build step to work in browsers D) They are only usable in SCSS files Answer: B
Developer Ultimate Exam
Explanation: CSS variables exist in the DOM and can be updated dynamically with JavaScript. Question 47. Which JavaScript feature allows destructuring of objects directly in function parameters? A) Rest parameters B) Spread syntax C) Default parameters D) Parameter destructuring Answer: D Explanation: Example: function foo({id, name}) {} extracts properties from the passed object. Question 48. What does the Array.prototype.reduce() method return? A) A new array with transformed elements B) A single accumulated value C) The original array unchanged D) The number of elements processed Answer: B Explanation: reduce applies a reducer function to accumulate a single result. Question 49. Which of the following statements about the this keyword in an arrow function is true? A. It has its own this binding based on how the function is called. B. It inherits this from the surrounding lexical scope. C. It always points to the global object. D. It is undefined in strict mode.
Developer Ultimate Exam
C) autocomplete D) novalidate Answer: B Explanation: Adding required forces the browser to check that the field is not empty before submission. Question 53. Which CSS property creates a smooth transition when a button’s background color changes on hover? A) animation B) transition: background-color 0.3s ease; C) filter D) transform Answer: B Explanation: transition defines the property to animate, duration, and timing function. Question 54. Which of the following is a correct way to declare a constant object in JavaScript that can still have its properties mutated? A) const obj = Object.freeze({}); B) let obj = {}; C) const obj = {}; D) var obj = {}; Answer: C Explanation: const prevents reassignment of the variable itself, but object properties remain mutable unless frozen. Question 55. In Node.js, which module provides the ability to create a simple HTTP server?
Developer Ultimate Exam
A) fs B) net C) http D) url Answer: C Explanation: The http module’s createServer method creates an HTTP server. Question 56. Which Express middleware function parses incoming JSON payloads? A) express.urlencoded() B) express.json() C) bodyParser.text() D) cookieParser() Answer: B Explanation: express.json() is built-in middleware for parsing JSON bodies. Question 57. Which HTTP status code indicates that the request was successful and a new resource was created? A) 200 B) 201 C) 202 D) 204 Answer: B Explanation: 201 Created is returned when a POST request results in a new resource.
