When traversing a binary tree, which diagram is post-order?

• 
• 
• 

Given a sequence of number below:

50,60,40,70,45,55,30,80,65,35,25,75,85

When creating a binary search tree, what is the height of the tree?

• 3

• 4

• 5

• 6

Given a binary search tree, insert 27, 15, 63, 99, 70 and 85 (in this order) into the binary search tree. What is the post-order traversal?

• 5,15,27,34,47,54,63,70,72,75,83,85,88,94,99,101

• 72,54,34,5,27,15,47,63,70,83,75,88,85,101,94,99

• 15,27,5,47,34,70,63,54,75,85,99,94,101,88,83,72

• 15,27,5,47,34,63,54,70,75,85,99,94,101,88,83,72

• none of the above

In Java, which of the following is the correct syntax to create a new thread?

• Thread t = new Thread(); t.start();

• Thread t = new Thread(); t.run();

• Thread.start();

• new Thread().begin();

In an exhibition seven brands have put up their stalls

- Each of these stalls are facing east.

-The seven brands which have put up a stall include: Titan, Biba, Landmark, Adidas, Puma, Zara and Reebok.

-Titan is next to the right of Reebok

-Reebok is fourth to the right of Landmark

-Adidas is between Biba and puma

-Landmark which is third to the left of Biba, is at one end

Which brand is displayed on the immediate right of Titan?

• Puma

• Reebok

• Adidas

• Zara

Consider the following table Employee.

Which query will return the second highest salary?

• SELECT MAX(Salary) FROM Employee;

• SELECT Salary FROM Employee WHERE Salary < MAX(Salary);

• SELECT MAX(Salary) FROM Employee WHERE Salary < (SELECT MAX(Salary) FROM Employee);

• SELECT DISTINCT Salary FROM Employee ORDER BY Salary DESC LIMIT 2;

What will the following query do?

• Return orders placed on 2023-01-01 or 2023-12-31 only

• Return orders placed before 2023-01-01

• Return orders placed in the year 2023, including 2023-01-01 and 2023-12-31

• Return orders placed after 2023-12-31

How can you find if a branch has already been merged into the main branch in Git?

• Use git merge-check

• Use git branch --merged

• Use git log --branches

• Use git status --merge

1. Some movies are thrillers.

All thrillers are suspenseful.

Therefore, some movies are suspenseful.

If the first two statements are true, the third statement is:

• True

• False

• Uncertain

• None

What protocol is most commonly used for real-time communication in chat services?

• Http

• Web Socket

• TCP/IP

• MQTT