List of practice Questions

Calculate the standard deviation of the given temperature below recorded for the 7 days of a week:
24, 24, 21, 20, 26, 27, 30
Which measure of central tendency is better suited for dealing with an outlier?
Sometimes, on calling a customer service center, the Interactive Voice Response System (IVRS) tells us to wait till a support person is available. Which data structure this application is of?
Suppose you want to select distinct salaries working in department 101 from the 'Employee' relation. What will be the correct order of writing the query?
(A) FROM Employee
(B) SELECT
(C) WHERE
(D) DISTINCT Salary
(E) Dept_ID= 101
Choose the correct answer from the options given below:
What happens even if a key is not present in the list during a linear search?
If a linear search is performed on 10 elements, how many comparisons will be needed in worst case?
How many passes are required to sort a list of 6 elements using bubble sort?
Which sorting algorithm involves repeatedly selecting the smallest element and placing it in its correct position?
A loop within a loop will have the time complexity as ________.
Which of the following are examples of unstructured data?
(A) Writing tweets
(B) Recording a video
(C) Marking attendance by the teacher
(D) Filling a form for opening an account
Choose the correct answer from the options given below:
In the below stack operation, what will be the output value for the variable 'result'?
result = 0
stack = [10, 20, 30]
stack.append(40)
result += stack.pop()
result += stack.pop()
What will be the postfix equivalent of the expression $(A + B) * (C - D)$?
Which of the following elements will be present in a queue after the end of the following operation sequence? Assume the queue is empty initially.
enqueue(10)
enqueue(20)
enqueue(30)
dequeue()
enqueue(40)
dequeue()
enqueue(50)
enqueue(60)
(A) 60
(B) 30
(C) 20
(D) 50
Choose the correct answer from the options given below:
Which of the following is a linear data structure?
(A) Deque
(B) Queue
(C) Stack
(D) Tree
Choose the correct answer from the options given below:
Which of the following statements is true in the context of a Deque?
Which of the following are the applications of binary search?
(A) Telephone Directory
(B) Finding the element with a minimum or maximum value in a sorted list
(C) Implementing routing tables
(D) Indexing in database
Choose the correct answer from the options given below:
Arrange the following statements in the correct sequence in order to write multiple strings to a file:
(A) myobj.close()
(B) lines= ["Hello everyone $\backslash$n", "writing multiple strings into file"]
(C) myobj.writelines(lines)
(D) myobj = open ("myfile.txt", 'w')
Choose the correct answer from the options given below:
Stack follows the ________ principle.
The 'raise' keyword in Python is used ________.
Which of the following statement is correct with respect to exception handling in python?
Which of the following methods is used to position a file object to a specific position in a file?
Consider an empty stack. What will the stack look like (starting from the top) after executing the following operations in sequence?
1. push(7)
2. push(5)
3. push(9)
4. push(11)
5. pop()
6. push(22)
(A) 22
(B) 9
(C) 5
(D) 7
Choose the correct answer from the options given below:
Arrange the evolution of networking as per the development timeline:
(A) The Berners-Lee at CERN developed HTML and URL, thus giving birth to World Wide Web (www).
(B) TCP/IP introduced as standard protocol on ARPANET.
(C) Roy Tomlinson develops network messaging or -mail symbol@ comes to mean "at".
(D) ARPANET became functional by connecting UCLA and SRI.
Choose the correct answer from the options given below:
Which of the following statement is CORRECT about GROUP BY clause in SQL?
A ________ is an access point between an organization's network and the outside world of the internet.