findElement by ID in Selenium Java - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Selenium Java code snippet?

Consider the following Selenium Java code that tries to find an element by ID and print its text. What will be printed if the element with ID "submitBtn" contains the text "Submit"?

Selenium Java

WebElement button = driver.findElement(By.id("submitBtn"));
System.out.println(button.getText());

A Submit

B submitBtn

C null

D NoSuchElementException

💡 Hint

The getText() method returns the visible text of the element.

The findElement(By.id("submitBtn")) locates the element with ID 'submitBtn'. Calling getText() on this element returns its visible text, which is 'Submit'.

❓ assertion

intermediate

Which assertion correctly verifies the text of an element found by ID?

You want to verify that the element with ID "welcomeMsg" contains the text "Welcome User". Which assertion is correct in JUnit?

Selenium Java

WebElement message = driver.findElement(By.id("welcomeMsg"));

A assertFalse(message.getText().equals("Welcome User"));

B assertTrue(message.getText() == "Welcome User");

C assertEquals("Welcome User", message.getText());

D assertNull(message.getText());

💡 Hint

Use assertEquals to compare strings in JUnit.

assertEquals(expected, actual) correctly compares the expected string with the actual text. Using '==' compares references, which is incorrect for strings.

❓ locator

advanced

Which locator correctly finds an element by ID in Selenium Java?

You want to find an element with the ID "loginInput". Which locator code is correct?

A driver.findElement(By.id("loginInput"));

B driver.findElement(By.name("loginInput"));

C driver.findElement(By.className("loginInput"));

D driver.findElement(By.tagName("loginInput"));

💡 Hint

ID is unique and located with By.id.

By.id("loginInput") finds the element with the exact ID. Other locators search by different attributes or tags.

🔧 Debug

advanced

What error occurs if findElement(By.id) does not find any element?

If the element with ID "nonExistent" is not present on the page, what happens when this code runs? WebElement elem = driver.findElement(By.id("nonExistent"));

Selenium Java

WebElement elem = driver.findElement(By.id("nonExistent"));

A NullPointerException

B NoSuchElementException

C TimeoutException

D ElementNotVisibleException

💡 Hint

findElement throws an exception if no element is found.

findElement throws NoSuchElementException immediately if the element is not found. It does not return null.

❓ framework

expert

In a Selenium Java test framework, which method best waits for an element by ID before interacting?

You want to wait up to 10 seconds for an element with ID "submitBtn" to be clickable before clicking it. Which code snippet correctly uses WebDriverWait?

A driver.findElement(By.id("submitBtn")).click();

B driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(10)); driver.findElement(By.id("submitBtn")).click();

C Thread.sleep(10000); driver.findElement(By.id("submitBtn")).click();

D new WebDriverWait(driver, Duration.ofSeconds(10)).until(ExpectedConditions.elementToBeClickable(By.id("submitBtn"))).click();

💡 Hint

Explicit waits wait for specific conditions before proceeding.

Option D uses explicit wait with WebDriverWait and ExpectedConditions to wait until the element is clickable, then clicks it. Option D clicks immediately and may fail if element not ready. Option D uses fixed sleep which is inefficient. Option D sets implicit wait but does not wait for clickability.