List of practice Questions

In data processing cycle after generating output, data is summarized using some statistical techniques. Choose the technique that is not used for Data summarization from the options given below
(A) Mean 
(B) Matplotlib 
(C) Mode 
(D) Rank 
(E) Numpy 
Choose the correct answer from the options given below :

What is the number of passes made by bubble sort for a list containing n elements ?

Consider the algorithm:
NameSearch (numList, key,n)
Step1: SET index = 0
Step2: WHILE index < n, REPEAT step3
Step3: IF numlist [index]-key THEN
                        PRINT "Element found at position", index + 1
                           STOP
             ELSE
                             index = index+1
Step4: PRINT "Search unsuccessfull"
The algorithm performs

Consider the following number list [8, 7, 13, 1, -9, 4] After applying selection sort, which of the list is correct after Pass 3 ?

Which of the following is(are) true for hashing
(A) The time required to compute the index value is independent of the number of items in the list 
(B) The time required to compute the index value depend on the number of items in the list 
(C) The cost of computing a hash function does not affect the performance of hashing based searching 
(D) The time taken by different hash functions may be different 
(E) There is no problem of collision in hashing 
Choose the correct answer from the options given below :

Which statement is incorrect in relation to searching an element in a list :

identify the stack in given example :

if len(Stack) =0 : print("error") The above statement is handling the situation called :

There are five statements listed below. Each statement having some information related to data structure. Identify the correct statement(s).
(A) A stack is an example of a FIFO data structure 
(B) The function top() removes the value from the top of a stack 
(C) The term deque stands for double ended queue 
(D) A queue is a data structure in which items can be added or removed from either end 
(E) PEEK is an operation used to view elements at the front of the queue, without removing it from the queue 
Choose the correct answer from the options given below:

Which one of the fallowing statement is wrong for Queue and stack data structures ?

Given an infix expression ((X+Y)*Z)/(5i+W) write its postfix notation :

is a combination of hardware and software which tulfill request by the web browser.

Nisha wants to install a computer network in her office at minimum cost. Help her to choose a topology in which less wire is used:

Which of the following are true about cookies.
(A) A cookie is a text file containing a string of information which is transferred by the website to the Browser when we browse it. 
(B) The information stored is retransmitted to the server. 
(C) It helps in customizing the information that will be displayed. 
(D) Cookies are always harmless. 
(E) First cookie software was created in 1994 at Netscape. 
Choose the correct answer from the options given below :

Which device is used to send the signals to only selected device instead of sending to all:

Which is not correct about string function?

Arrange the following commands in the correct order of execution
(A) SELECT 
(B) ORDER BY 
(C) GROUP BY 
(D) WHERE 
(E) FROM
 Choose the correct answer from the options given below:

Consider the tables A and B given below. How many tuples will be in the output after apply A B operation.
A

SNO	Name	Class
1	Meena	8
2	Meena	6
3	Leena	7
4	Vijaya	7
5	Sujata	8

B

SNO	Name	Class
1	Asha	7
2	Meena	6
3	Mohit	7
4	Vijaya	7

How many join operation are needed to combine N tables on equality condition.

A key is used to represent the relationship between two relations.

In relational database management system RDBMS, a tuple is defined as :

If, for some 𝛼∈(0, ∞),
\(∫^∞_02^{-x^2}dx=a\sqrt\pi,\) 
then 𝛼 equals (round off to two decimal places)

If a statement int ('Hello') is written in python, then what kind of exception will it give ?

If an error encountered in a method, then what would be one of the correct sequence of the following steps in the exception handling process :
(A) Exception is raised 
(B) Create exception object 
(C) Searches for method in call stack in reverse sequence 
(D) An error encountered in a method 
(E) Runtime system searches for exception handler in the current method 
Choose the correct answer from the options given below :