List of top Computer Science Questions

Match List-I with List-II:
\[\begin{array}{|c|c|}\hline \textbf{List-I} & \textbf{List-II} \\ \hline (A)\ \text{FCFS} & (III)\ \text{Often long average waiting time} \\ \hline (B)\ \text{Round Robin} & (I)\ \text{FCFS + preemption} \\ \hline (C)\ \text{Multi-level queue scheduling} & (IV)\ \text{Permanent assignment of processes to one specific queue} \\ \hline (D)\ \text{Multi-level Feedback Queue} & (II)\ \text{Allows the processes to move between queues} \\ \hline \end{array}\] Choose the correct answer from the options given below:
Which of the following is not an application of DFS?
Consider the task of finding the shortest path in an unweighted graph by using BFS and DFS. Which of the following statements are true?
(A). BFS always finds the shortest path.
(B). DFS always finds the shortest path.
(C). DFS does not guarantee finding the shortest path.
(D). BFS does not guarantee finding the shortest path.
What is the result of the following operation defined by IEEE754?
\[ \text{(NaN == NaN)} \]
If the line through \( (3, y) \) and \( (2, 7) \) is parallel to the line through \( (-1, 4) \) and \( (0, 6) \), then the value of \( y \) is:
Given the index i of a node in a heap, we can not compute:
Introducing a man to her husband, a woman said, "His brother's father is the only son of my grandfather." How is the woman related to this man?
The length of major axis and coordinate of vertices for the ellipse \( 3x^2 + 2y^2 = 6 \) respectively are:
Violation of intellectual property right may happen due to:
(A) Copyright Infringement
(B) Patent
(C) Trademark Infringement
(D) Plagiarism
Arrange the following in sequence of execution:
(A) HTTP Request
(B) Calls an application in response to the HTTP request
(C) Program executes and produces HTML output
(D) HTTP Response
__________ is a branch of science that deals with designing and arranging of workplaces.
HTTP is .............
________________ is the trail of data we leave behind when we visit any website (or use any online application or portal) to fill-in data or perform any transaction.
Which of the following is a networking device?
(A) Gateway
(B) Repeater
(C) MAN
(D) Modem
____________ is the largest WAN that connects billions of computers, smartphones, and millions of LANs from different countries.
Cable based broadband internet services are example of ..............

 Which of the following are the correct commands to delete a column from the DataFrame df1? 

Sequence the steps to append data to an existing file and then read the entire file:
(A) Open the file in a+ mode.
(B) Use the read() method to output the contents.
(C) Use the write() or writelines() method to append data.
(D) Seek to the beginning of the file.
The plot function of pandas matplotlib uses 'kind' argument which can accept a string indicating the type of graph to be plotted. Which of the following are valid plots?
____________ in matplotlib also known as correlation plot, because they show how two variables are related.

Given the following code for histogram:

df.plot(kind='hist', edgecolor="Green", linewidth=2, linestyle='-', fill=False, hatch='o')

What is the role of fill=False?

The intellectual property right that is granted for inventions is ____________.
A __________ value is specified for the column, if no value is provided.
The SELECT command when combined with DISTINCT clause is used to:
Which of the following is the correct command to display the top 2 records of Series \texttt{tail}?