```
**Explanation of Choices:**
1. **`` Tag:**
* **"GATE 2022 Civil Engg: Crest Curve Length for 200m SSD | Q.63 Solution"**
* **Why:** It's specific (GATE 2022, Civil Engg), highlights the main topic (Crest Curve Length), includes a key parameter (200m SSD), and indicates it's a solution to a specific question (Q.63). This is highly clickable for students searching for solutions.
2. **`<meta name="description">` Tag:**
* **"Find the solution to GATE 2022 Civil Engineering Set 2 Q.63. Learn to calculate minimum parabolic vertical crest curve length given grades, 200m SSD, driver & obstacle heights."**
* **Why:** Expands on the title, provides more detail about the problem, lists key variables, and reinforces the idea that it's a helpful resource for solving the problem. It uses keywords like "parabolic vertical crest curve," "grades," "SSD," "driver height," "obstacle height."
3. **`<meta name="keywords">` Tag:**
* **"GATE Civil Engineering, GATE 2022, vertical crest curve, curve length, stopping sight distance, SSD, highway design, transportation engineering, parabolic curve, road grades, driver height, obstacle height, civil engineering problems, exam solutions, question 63"**
* **Why:** A comprehensive list of relevant terms for search engines. While Google relies less on this, other search engines or internal site searches might still use it.
4. **`<link rel="canonical">` Tag:**
* **`href="https://examprev.com/question/civil-engineering-gate-2022-set-2-question-63"`**
* **Why:** Essential for SEO to tell search engines the preferred version of a URL, preventing duplicate content issues.
5. **Open Graph (OG) Tags (for Facebook, LinkedIn, etc.):**
* `og:type`: `article` is appropriate for a specific question/solution page.
* `og:url`: The exact URL of the page.
* `og:title`: Similar to the meta title, but often slightly shorter or optimized for social sharing.
* `og:description`: Similar to the meta description.
* `og:image`: **Crucial.** This is the image that will appear when the link is shared. You should replace `[URL to a relevant image...]` with an actual image URL (e.g., a diagram explaining crest curves, the Examprev logo, or a specific graphic for GATE solutions). A good image significantly increases click-through rates on social media.
* `og:site_name`: The name of your website for branding.
6. **Twitter Card Tags:**
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* `twitter:url`, `twitter:title`, `twitter:description`, `twitter:image`: Follow similar logic to the Open Graph tags.
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Civil Engineering > GATE 2022 SET-2 > Highway Geometric Design
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<div class="question-text">A parabolic vertical crest curve connects two road segments with grades +1.0% and-2.0%. If a 200 m stopping sight distance is needed for a driver at a height of 1.2 m to avoid an obstacle of height 0.15 m, then the minimum curve length should be _______ m. (round off to the nearest integer)</div>
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<p><b>Correct :</b> 304</p>
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<script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>
<script>
// Get data from Laravel controller
const user = null;
const sampleNotifications = [];
// Global variables to store menu elements
let notificationBtn, notificationMenu, notificationOverlay, notificationBadge;
// Generate notification content function
function generateNotificationContent() {
if (!user) {
return `
<div class="login-prompt">
<i class="fas fa-user-lock"></i>
<h6>Sign in to View Notifications</h6>
<p>Login to access your personalized notifications and stay updated with your exam progress.</p>
<a href="/login" class="login-btn">
<i class="fas fa-sign-in-alt me-2"></i>
Login Now
</a>
</div>
`;
}
const notifications = sampleNotifications || [];
const unreadCount = notifications.filter(n => n.unread).length;
let content = `
<div class="notification-header">
<h6 class="notification-title">
<i class="fas fa-bell me-2"></i>
Notifications
${unreadCount > 0 ? `<span class="notification-count">${unreadCount} new</span>` : ''}
</h6>
</div>
`;
if (notifications.length === 0) {
content += `
<div class="notification-empty">
<i class="fas fa-bell-slash"></i>
<h6>No Notifications</h6>
<p>You're all caught up! New notifications will appear here.</p>
</div>
`;
} else {
content += '<div class="notification-body">';
notifications.forEach(notification => {
content += `
<div class="notification-item ${notification.unread ? 'unread' : ''}" onclick="markAsRead(${notification.id})">
<div class="notification-icon ${notification.type}">
<i class="${notification.icon}"></i>
</div>
<div class="notification-content">
<p class="notification-text">${notification.text}</p>
<small class="notification-time">${notification.time}</small>
</div>
</div>
`;
});
content += '</div>';
}
if (notifications.length > 0) {
content += `
<div class="notification-footer">
<a href="/notifications">View All Notifications</a>
</div>
`;
}
return content;
}
// Close notification menu function
function closeNotificationMenu() {
if (notificationMenu) notificationMenu.classList.remove('show');
if (notificationOverlay) notificationOverlay.classList.remove('show');
}
// Open notification menu function
function openNotificationMenu() {
if (typeof closeLoginModal === 'function') {
closeLoginModal();
}
if (notificationMenu) notificationMenu.classList.add('show');
if (notificationOverlay) notificationOverlay.classList.add('show');
}
function initializeNotifications() {
// Get DOM elements
notificationBtn = document.getElementById('notificationBtn');
notificationMenu = document.getElementById('notificationMenu');
notificationOverlay = document.getElementById('notificationOverlay');
notificationBadge = document.getElementById('notificationBadge');
if (!notificationBtn || !notificationMenu) {
console.error('Notification elements not found');
return;
}
// Populate notification menu
notificationMenu.innerHTML = generateNotificationContent();
// Toggle notification dropdown
notificationBtn.addEventListener('click', function(e) {
e.preventDefault();
e.stopPropagation();
const isOpen = notificationMenu.classList.contains('show');
console.log('Notification button clicked, isOpen:', isOpen);
if (isOpen) {
closeNotificationMenu();
} else {
openNotificationMenu();
}
});
// Close notification menu when clicking outside
document.addEventListener('click', function(e) {
if (!notificationBtn.contains(e.target) && !notificationMenu.contains(e.target)) {
closeNotificationMenu();
}
});
// Close notification menu when clicking overlay
if (notificationOverlay) {
notificationOverlay.addEventListener('click', closeNotificationMenu);
}
// Close notification menu on escape key
document.addEventListener('keydown', function(e) {
if (e.key === 'Escape') {
closeNotificationMenu();
if (typeof closeLoginModal === 'function') {
closeLoginModal();
}
}
});
// Prevent notification menu from closing when clicking inside it
notificationMenu.addEventListener('click', function(e) {
e.stopPropagation();
});
}
// Profile dropdown functionality
function initializeProfile() {
const profileBtn = document.getElementById('profileBtn');
const profileMenu = document.getElementById('profileMenu');
if (!profileBtn) return;
if (!user) {
// For unauthenticated users, show login modal
profileBtn.addEventListener('click', function(e) {
e.stopPropagation();
if (typeof openLoginModal === 'function') {
openLoginModal();
}
});
} else {
// For authenticated users, use hover behavior (handled by CSS)
// Additional click handling for mobile
profileBtn.addEventListener('click', function(e) {
e.stopPropagation();
if (profileMenu) {
const isVisible = profileMenu.style.opacity === '1' || window.getComputedStyle(profileMenu).opacity === '1';
if (isVisible) {
profileMenu.style.opacity = '0';
profileMenu.style.visibility = 'hidden';
profileMenu.style.transform = 'translateY(10px)';
} else {
closeNotificationMenu();
if (typeof closeLoginModal === 'function') {
closeLoginModal();
}
profileMenu.style.opacity = '1';
profileMenu.style.visibility = 'visible';
profileMenu.style.transform = 'translateY(0)';
}
}
});
// Close profile menu when clicking outside (mobile)
document.addEventListener('click', function(e) {
if (window.innerWidth <= 768 && profileMenu && !profileBtn.contains(e.target) && !profileMenu.contains(e.target)) {
profileMenu.style.opacity = '0';
profileMenu.style.visibility = 'hidden';
profileMenu.style.transform = 'translateY(10px)';
}
});
}
}
// Login modal functionality
function initializeLoginModal() {
const loginModalOverlay = document.getElementById('loginModalOverlay');
const loginModal = document.getElementById('loginModal');
const closeLoginBtn = document.getElementById('closeLoginModal');
if (!loginModalOverlay) return; // Only for unauthenticated users
// Close login modal
window.closeLoginModal = function() {
loginModalOverlay.classList.remove('show');
};
// Open login modal
window.openLoginModal = function() {
closeNotificationMenu();
loginModalOverlay.classList.add('show');
};
// Close button
if (closeLoginBtn) {
closeLoginBtn.addEventListener('click', window.closeLoginModal);
}
// Close when clicking overlay
loginModalOverlay.addEventListener('click', function(e) {
if (e.target === loginModalOverlay) {
window.closeLoginModal();
}
});
// Prevent modal from closing when clicking inside
if (loginModal) {
loginModal.addEventListener('click', function(e) {
e.stopPropagation();
});
}
}
// Mark notification as read
function markAsRead(notificationId) {
if (!user || !sampleNotifications) return;
const notification = sampleNotifications.find(n => n.id === notificationId);
if (notification && notification.unread) {
notification.unread = false;
// Update badge count
const unreadCount = sampleNotifications.filter(n => n.unread).length;
if (notificationBadge) {
notificationBadge.textContent = unreadCount;
notificationBadge.style.display = unreadCount > 0 ? 'block' : 'none';
}
// Refresh notification content
if (notificationMenu) {
notificationMenu.innerHTML = generateNotificationContent();
}
// Send AJAX request to mark notification as read
fetch('/notifications/mark-read', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
},
body: JSON.stringify({
notification_id: notificationId
})
})
.then(response => response.json())
.then(data => {
if (data.success) {
console.log('Notification marked as read');
}
})
.catch(error => {
console.error('Error marking notification as read:', error);
// Revert the change if request failed
notification.unread = true;
const unreadCount = sampleNotifications.filter(n => n.unread).length;
if (notificationBadge) {
notificationBadge.textContent = unreadCount;
notificationBadge.style.display = unreadCount > 0 ? 'block' : 'none';
}
if (notificationMenu) {
notificationMenu.innerHTML = generateNotificationContent();
}
});
}
}
// Initialize when DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
console.log('DOM loaded, initializing...');
initializeNotifications();
initializeProfile();
initializeLoginModal();
});
// Function to add new notification (for testing or real-time updates)
function addNewNotification(notification) {
if (user && sampleNotifications) {
sampleNotifications.unshift(notification);
// Update badge and content
if (notificationBadge) {
const unreadCount = sampleNotifications.filter(n => n.unread).length;
notificationBadge.textContent = unreadCount;
notificationBadge.style.display = unreadCount > 0 ? 'block' : 'none';
}
if (notificationMenu) {
notificationMenu.innerHTML = generateNotificationContent();
}
}
}
// Function to refresh notifications from server
function refreshNotifications() {
if (!user) return;
fetch('/notifications/get', {
method: 'GET',
headers: {
'Content-Type': 'application/json',
'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
}
})
.then(response => response.json())
.then(data => {
if (data.success && data.notifications) {
// Update notifications array
sampleNotifications.length = 0;
sampleNotifications.push(...data.notifications);
// Update UI
if (notificationBadge) {
const unreadCount = sampleNotifications.filter(n => n.unread).length;
notificationBadge.textContent = unreadCount;
notificationBadge.style.display = unreadCount > 0 ? 'block' : 'none';
}
if (notificationMenu) {
notificationMenu.innerHTML = generateNotificationContent();
}
}
})
.catch(error => {
console.error('Error refreshing notifications:', error);
});
}
// Auto-refresh notifications every 30 seconds if user is logged in
if (user) {
setInterval(refreshNotifications, 30000);
}
window.onload = function() {
try
{
const currentUrl = window.location.href;
if (currentUrl === "https://examprev.com/contribute-answer-with-examprev")
{
const branchSelect = document.getElementById('branchSelect');
const selectedBranch = branchSelect.value;
fetchQuestions(selectedBranch);
}
console.log("Page loaded successfully without errors.");
}
catch(error)
{
console.error("An error occurred:", error.message);
}
const csrfToken = document.querySelector('input[name="_token"]')?.value;
if (!csrfToken) {
console.error('CSRF token not found');
return;
}
const currentURL = window.location.href;
const formData = new FormData();
// Assuming csrf() is a function that returns the CSRF token.
formData.append('currentUrl', currentURL);
};
function scrollPagination(direction) {
const container = document.getElementById("paginationContainer");
const scrollAmount = 100; // Adjust scroll distance
container.scrollBy({ left: direction * scrollAmount, behavior: "smooth" });
}
function ensureActivePageVisible() {
const container = document.getElementById("paginationContainer");
const activePage = document.querySelector(".custom-pagination-button.active");
if (activePage) {
const containerRect = container.getBoundingClientRect();
const activePageRect = activePage.getBoundingClientRect();
// Check if the active page is outside the visible scroll area
if (activePageRect.left < containerRect.left || activePageRect.right > containerRect.right) {
container.scrollLeft += (activePageRect.left - containerRect.left) - (container.offsetWidth / 2) + (activePage.offsetWidth / 2);
}
}
}
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document.addEventListener("DOMContentLoaded", ensureActivePageVisible);
document.querySelectorAll(".option").forEach(fieldset => {
fieldset.addEventListener("click", function () {
let questionId = this.getAttribute("data-question-id");
let messageElement = document.getElementById("message-" + questionId);
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if (document.querySelector(`[data-question-id='${questionId}'].correct`) || document.querySelector(`[data-question-id='${questionId}'].incorrect`)) {
return;
}
let legend = this.querySelector("legend");
legend.style.visibility = "visible";
legend.style.fontFamily = "'Poppins', sans-serif";
if (this.getAttribute("data-correct") === "true") {
this.classList.add("correct");
legend.innerText = "Correct";
legend.classList.add("correct-text");
messageElement.innerText = "Correct! 🎉";
messageElement.style.color = "green";
} else {
this.classList.add("incorrect");
legend.innerText = "Incorrect";
legend.classList.add("incorrect-text");
messageElement.innerText = "Incorrect! ❌ Try again.";
messageElement.style.color = "red";
// Highlight correct answers within the same question
document.querySelectorAll(`[data-question-id='${questionId}'][data-correct='true']`).forEach(correctOption => {
correctOption.classList.add("correct");
let correctLegend = correctOption.querySelector("legend");
correctLegend.style.visibility = "visible";
correctLegend.innerText = "Correct";
correctLegend.classList.add("correct-text");
});
}
});
});
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let adsLoaded = false;
function loadAdSense() {
if (adsLoaded) return;
adsLoaded = true;
var s = document.createElement("script");
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"https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4999327676889242";
s.async = true;
s.crossOrigin = "anonymous";
document.head.appendChild(s);
}
// Load after page is fully loaded + 2 seconds
window.addEventListener("load", function () {
setTimeout(loadAdSense, 5000);
});
})();
(function () {
function updateVisitorCount(count) {
const el = document.getElementById("visitorCount");
if (!el) return;
el.innerHTML = "";
count.toString().split("").forEach(d => {
const s = document.createElement("span");
s.className = "digit";
s.textContent = d;
el.appendChild(s);
});
}
function loadVisitorCount() {
const csrf =
document.querySelector('meta[name="csrf-token"]')?.content ||
document.querySelector('input[name="_token"]')?.value;
if (!csrf) return;
const fd = new FormData();
fd.append("currentUrl", location.href);
fetch("/getVisitorCount", {
method: "POST",
headers: { "X-CSRF-TOKEN": csrf },
body: fd,
keepalive: true
})
.then(r => r.json())
.then(d => d?.count && updateVisitorCount(d.count))
.catch(() => {});
}
window.addEventListener("load", () => {
setTimeout(loadVisitorCount, 3000);
});
})();
</script></html>