Ruby Mock Test 5 - Online MCQ Exam

Which class represents an Internet Protocol address?

1 Mark(s)

Your Answer:

InetAddress InetAddress
Address Address
IP Address IP Address
TCP Address TCP Address

Which of the following is NOT a delimiter for an input in scanf?

1 Mark(s)

Your Answer:

Enter Enter
Space Space
Tab Tab
None of the mentioned None of the mentioned

What will be the output of the following PHP code ? <?php $a = 10; $b = 4; $c = fun(10,4); function fun($a,$b) { $b = 3; return $a - $b + $b - $a; } echo $a; echo $b; echo $c; ?>

1 Mark(s)

Your Answer:

1040 1040
1410 1410
1400 1400
4100 4100

Derivative of 'Hy' where H is constant will be:

1 Mark(s)

Your Answer:

Hy Hy
Hx Hx
xy xy
H H

What is the role of the `ServletContextListener` interface in Java web applications?

1 Mark(s)

Your Answer:

To listen for context initialization and destruction events
To define JavaBean properties To define JavaBean properties
To execute SQL queries To execute SQL queries
To create JavaBeans To create JavaBeans

Which of these method of class String is used to extract a single character from a String object?

1 Mark(s)

Your Answer:

CHARAT() CHARAT()
chatat() chatat()
charAt() charAt()
ChatAt() ChatAt()

Which Ruby module is commonly used for method delegation?

1 Mark(s)

Your Answer:

Delegator Delegator
Delegate Delegate
Forwardable Forwardable
Proxy Proxy

Which of the following methods is used to replace all occurrences of a specified character in a string in Java?

1 Mark(s)

Your Answer:

replace() replace()
replaceAll() replaceAll()
replaceChar() replaceChar()
replaceAllOccurrences() replaceAllOccurrences()

What is the output of the given code? age = 5 case age when 0 .. 2 puts "baby" when 3 .. 6 puts "little child" when 7 .. 12 puts "child" when 13 .. 18 puts "youth" else puts "adult" end

1 Mark(s)

Your Answer:

baby baby
adult adult
little child little child
youth youth

In Internet Protocol Version (IPv6), real-time audio or video, particularly in digital form, requires resources such as:

1 Mark(s)

Your Answer:

fixed bandwidth fixed bandwidth
variable bandwidth variable bandwidth
high bandwidth high bandwidth
low bandwidth low bandwidth

What does the term "MapReduce chaining" refer to in advanced MapReduce?

1 Mark(s)

Your Answer:

Execution of multiple MapReduce jobs in sequence
Chaining multiple Map and Reduce tasks in a single job
Combining multiple MapReduce jobs Combining multiple MapReduce jobs
Parallel execution of Map tasks Parallel execution of Map tasks

How can you determine if a queue is full when using a fixed-size array implementation?

1 Mark(s)

Your Answer:

By checking if the rear pointer is at the maximum capacity
By checking if the front pointer is equal to the rear pointer
By checking if the size equals the array size
By checking if the array is null By checking if the array is null

Difference between a while and a do while loop:

1 Mark(s)

Your Answer:

A while and a do while loop are same A while and a do while loop are same
A while loop works for discrete iterations
A do while loop is more efficient A do while loop is more efficient
Ado while loop always executes even if the condition is false whereas a while loop only works with t

What is the purpose of the #define directive in C preprocessing?

1 Mark(s)

Your Answer:

To include a header file To include a header file
To define a macro To define a macro
To declare a constant To declare a constant
To declare a variable To declare a variable

The network layer is responsible for the:

1 Mark(s)

Your Answer:

node to node communication node to node communication
source to destination source to destination
hop to hop communication hop to hop communication
peer to peer transmission peer to peer transmission

Ratio T2/a3 for Saturn is equals to:

1 Mark(s)

Your Answer:

3.01x10-34 y2/m3 3.01x10-34 y2/m3
2.98x10-34 y2/m3 2.98x10-34 y2/m3
2.96x10-34 y2/m3 2.96x10-34 y2/m3
2.99x10-34 y2/m3 2.99x10-34 y2/m3

The yellowness of the Taj Mahal is an effect of -

1 Mark(s)

Your Answer:

Acid rain Acid rain
Allergens Allergens
Ozone depletion Ozone depletion
None of the above None of the above

Which port is used by IMAP?

1 Mark(s)

Your Answer:

25 25
110 110
143 143
443 443

Suppose you are given a text right on MS Word and you have to align each line of the text on equal distance from left and right margins, which of the following alignment you will apply?

1 Mark(s)

Your Answer:

Justify Justify
Align text left Align text left
Align text right Align text right
None of these None of these

Which among the following is a correct statement about namespace used in C#.NET?

1 Mark(s)

Your Answer:

Classes must belong to a namespace, whereas structures need not
All elements of the namespace must to belong to one file
If not mentioned, a namespace takes the name of the current project
All of the mentioned All of the mentioned

Which of the following is good coding practice to determine oddity? i) public boolen abc(int num) { return num % 2 == 1; } ii) public boolean xyz(int num) { return (num & 1)!= 0; }

1 Mark(s)

Your Answer:

i i
ii ii
(i) causes compilation error (i) causes compilation error
(ii) causes compilation error (ii) causes compilation error

What is the result of 8 / 2 ** 2 ?

1 Mark(s)

Your Answer:

1 1
8 8
4 4
16 16

Which property is used to add space inside the text field?

1 Mark(s)

Your Answer:

padding padding
margin margin
number number
password password

Background of screen is known as

1 Mark(s)

Your Answer:

application application
window window
desktop desktop
frame frame

When is the mouseover event fired?

1 Mark(s)

Your Answer:

When mouse is moved over a new element When mouse is moved over a new element
When mouse is clicked When mouse is clicked
When mouse is both moved and clicked When mouse is both moved and clicked
None of the mentioned None of the mentioned

How many types of Iterators are provided by C++?

1 Mark(s)

Your Answer:

2 2
3 3
4 4
5 5

The class from which the child class inherits is called. 1. Child class 2. Parent class 3. Super class 4. Base class

1 Mark(s)

Your Answer:

Only 1 Only 1
2, 3 and 4 2, 3 and 4
Only 3 Only 3
2 and 4 2 and 4

Rabbit eats the grass and the fox eats the rabbit, so the fox is:

1 Mark(s)

Your Answer:

prey prey
primary producers primary producers
secondary producers secondary producers
omnivores omnivores

How many kinds of parameters are there in C++?

1 Mark(s)

Your Answer:

1 1
2 2
3 3
5 5

Fetching data from the large objects can be performed using method such as:

1 Mark(s)

Your Answer:

getString() getString()
getBytes() getBytes()
getSubString() getSubString()
Both B and C Both B and C

Input devices includes:

1 Mark(s)

Your Answer:

mouse, keyboard, monitor mouse, keyboard, monitor
mouse, keyboard, printer mouse, keyboard, printer
mouse, keyboard, plotter mouse, keyboard, plotter
mouse, keyboard, scanner mouse, keyboard, scanner

Which algorithm is used for Clustering?

1 Mark(s)

Your Answer:

Decision Tree Decision Tree
K-Means K-Means
Linear Regression Linear Regression
Naive Bayes Naive Bayes

Which of the following properties is essential for the efficient implementation of Dijkstra's algorithm?

1 Mark(s)

Your Answer:

An adjacency matrix for fast access. An adjacency matrix for fast access.
A stack to keep track of visited nodes. A stack to keep track of visited nodes.
A hash table for node storage. A hash table for node storage.
A priority queue or min-heap to extract the minimum distance.

In Sqoop, what does the term "Export" refer to?

1 Mark(s)

Your Answer:

Execute MapReduce jobs Execute MapReduce jobs
Transfer data from a relational database to Hadoop
Manage computation resources Manage computation resources
None of the above None of the above

In a computer, standard which governs parallel communication is:

1 Mark(s)

Your Answer:

RS-232 RS-232
RS-232a RS-232a
CAT 5 CAT 5
IEEE 1284 IEEE 1284

Which algorithm is well-suited for string matching when dealing with long and complex patterns?

1 Mark(s)

Your Answer:

Boyer-Moore Boyer-Moore
Knuth-Morris-Pratt (KMP) Knuth-Morris-Pratt (KMP)
Rabin-Karp Rabin-Karp
Naive Search Naive Search

SQL provides constructs for:

1 Mark(s)

Your Answer:

Updation Updation
Insertion Insertion
Deletion Deletion
All of the Above All of the Above

A system in which exchange takes place between living and non-living things is known as:

1 Mark(s)

Your Answer:

cycle cycle
computer system computer system
ecosystem ecosystem
none of them none of them

1.77 is refractive index of:

1 Mark(s)

Your Answer:

Carbon disulfide Carbon disulfide
Sapphire Sapphire
Heavy fint glass Heavy fint glass
Diamond Diamond

Disk copy command in DOS used to:

1 Mark(s)

Your Answer:

copy a file copy a file
copy contents of one floppy disk to another
copy content of CD-ROM to another copy content of CD-ROM to another
copy contents hard disk copy contents hard disk

In Ruby, what does the `case` statement allow you to compare against?

1 Mark(s)

Your Answer:

Integers Integers
Strings Strings
Ranges Ranges
All of the above All of the above

In order to email a Word document from within MS Word

1 Mark(s)

Your Answer:

Office button > Send to > Mail Recipient
Save the file as an email attachment Save the file as an email attachment
Start Outlook and attach the file while open in Word
This is an impossible operation This is an impossible operation

In MS Excel, the $ symbol in a formula denotes ______?

1 Mark(s)

Your Answer:

Named Range Named Range
Currency Format Currency Format
Absolute Cell Reference Absolute Cell Reference
None of these None of these

In a graph, which of the following is an example of a node?

1 Mark(s)

Your Answer:

Edge Edge
Vertex Vertex
Cycle Cycle
Degree Degree

The variation in absorption spectrum with polarization direction can be used to investigate the degree of:

1 Mark(s)

Your Answer:

orientation of ions orientation of ions
orientation of atoms orientation of atoms
orientation of molecules orientation of molecules
orientation of compound orientation of compound

Lambda functions cannot be pickled because:

1 Mark(s)

Your Answer:

Lambda functions only deal with binary values, that is, 0 and 1
Lambda functions cannot be called directly
Lambda functions cannot be identified by the functions of the pickle module
All lambda functions have the same name, that is,

What does COW stand for in memory management?

1 Mark(s)

Your Answer:

Convert overwrite Convert overwrite
Copy overwrite Copy overwrite
Cut overwrite Cut overwrite
Copy on write Copy on write

What are the different types of exceptions?

1 Mark(s)

Your Answer:

1 1
2 2
3 3
4 4

Making the push operation costly, select the code snippet which implements the pop operation.

1 Mark(s)

Your Answer:

public void pop() { if(q1.size()>0) { q2.poll(); } else if(q2.size()>0) { q1.poll(); } }
public void pop() { if(q1.size()>0) { q1.poll(); } else if(q2.size()>0) { q2.poll(); } }
public void pop() { q1.poll(); q2.poll(); }
public void pop() { if(q2.size()>0) { q1.poll(); } else { q2.poll(); } }

Which of these method can be used to increase the capacity of ArrayList object manually?

1 Mark(s)

Your Answer:

Capacity() Capacity()
increaseCapacity() increaseCapacity()
increasecapacity() increasecapacity()
ensureCapacity() ensureCapacity()

How many types of data structures does R language have?

1 Mark(s)

Your Answer:

2 2
3 3
5 5
8 8

In R, what does the plot() function do when applied to a linear regression model?

1 Mark(s)

Your Answer:

Plots the residuals against the fitted values
Creates a scatter plot of the model predictions
Plots the model coefficients Plots the model coefficients
Generates a summary plot for the model Generates a summary plot for the model

Crtl +Z is used for?

1 Mark(s)

Your Answer:

print print
save save
undo undo
none none

What is the purpose of the "if-else" statement in Java?

1 Mark(s)

Your Answer:

To execute one block of code if a condition is true and another block if it's false
To declare variables To declare variables
To create loops To create loops
To define methods To define methods

What is the code snippet to change the class and let the stylesheet specify the details?

1 Mark(s)

Your Answer:

timestamp.className = "highlight"; timestamp.className = "highlight";
timestamp.className = "change"; timestamp.className = "change";
timestamp.className = "specify"; timestamp.className = "specify";
timestamp.className = "move"; timestamp.className = "move";

What is needed to determine the number of the last byte of a fragment in IPv4?

1 Mark(s)

Your Answer:

Identification number Identification number
Offset number Offset number
Total length Total length
(B) and (C) (B) and (C)

In MS Excel, You can copy data or formulas _____?

1 Mark(s)

Your Answer:

With buttons on the standard toolbars With buttons on the standard toolbars
With commands on the shortcut menu With commands on the shortcut menu
With the copy, paste and cut commands on the edit menu
All of the above All of the above

How do you find the number of minutes between two DateTime objects in Ruby?

1 Mark(s)

Your Answer:

Subtract one DateTime object from another and divide the result by 60 to convert to minutes
Use the minutes_between method Use the minutes_between method
Use the difference method with the minutes option
Use the delta method with the minutes option

Which mode allows us to run program interactively while watching source code and variables during execution?

1 Mark(s)

Your Answer:

safe mode safe mode
debug mode debug mode
successfully run mode successfully run mode
exception mode exception mode

What is the time complexity of exponential search when the input array is sorted but the values are not uniformly distributed?

1 Mark(s)

Your Answer:

O(n1/2) O(n1/2)
O(log log n) O(log log n)
O(n) O(n)
O(log n) O(log n)

The ....... contains commands associated with the My Computer window

1 Mark(s)

Your Answer:

Standard menu Standard menu
Start menu Start menu
System menu System menu
None of the above None of the above

What is the primary benefit of autoboxing in Java?

1 Mark(s)

Your Answer:

It improves memory management It improves memory management
It reduces code complexity It reduces code complexity
It simplifies code by automatically converting between primitive types and their corresponding wrapper classes
It speeds up code execution It speeds up code execution

What is the maximum efficiency of slotted aloha at G = 1?

1 Mark(s)

Your Answer:

36.8 36.8
35.8 35.8
35.5 35.5
37.8 37.8

Integral curves for a differential equation that governs a system are referred to as:

1 Mark(s)

Your Answer:

streamlines streamlines
electrical lines electrical lines
trajectories trajectories
field lines field lines

How many non-overlapping channels are available with 802.11a?

1 Mark(s)

Your Answer:

3 3
12 12
23 23
40 40

Which one of the following is more efficient in terms of the file size reduction?

1 Mark(s)

Your Answer:

YUI YUI
Closure Compiler (advanced) Closure Compiler (advanced)
Minify Minify
Closure Compiler (simple) Closure Compiler (simple)

When methane is combusted with oxygen, the products produced are:

1 Mark(s)

Your Answer:

nitrogen & oxygen nitrogen & oxygen
carbon dioxide & water carbon dioxide & water
oxygen & water oxygen & water
many gases many gases

Which file is used to define dependency in maven?

1 Mark(s)

Your Answer:

build.xml build.xml
pom.xml pom.xml
dependency.xml dependency.xml
version.xml version.xml

The fall in the rate of photosynthesis takes place when the temperature rises above:

1 Mark(s)

Your Answer:

40 °C 40 °C
30 °C 30 °C
20 °C 20 °C
25 °C 25 °C

NRZ-L and NRZ-J both have a problem of:

1 Mark(s)

Your Answer:

conversion conversion
phase shift phase shift
doesn't changes at all doesn't changes at all
DC component DC component

This database has only one table.

1 Mark(s)

Your Answer:

relational relational
large large
flat-file flat-file
DBMS DBMS

Which one of the following keyword is used to find out the number of values in a column?

1 Mark(s)

Your Answer:

TOTAL TOTAL
COUNT COUNT
SUM SUM
ADD ADD

The 3R principle is in which of the following order:

1 Mark(s)

Your Answer:

Reduce, Reuse, Recycle Reduce, Reuse, Recycle
Reuse, Reduce, Recycle Reuse, Reduce, Recycle
Recycle, Reuse, Reduce, Recycle, Reuse, Reduce,
None of the above None of the above

What keyword is used to release memory in C++?

1 Mark(s)

Your Answer:

free free
delete delete
remove remove
clear clear

What is the output of the following code: import re result = re.findall(r'bw+b', 'Hello, world!') print(result)

1 Mark(s)

Your Answer:

['Hello', 'world'] ['Hello', 'world']
An error will occur An error will occur
['Hello,', 'world!'] ['Hello,', 'world!']
['H', 'w'] ['H', 'w']

What does MAC stand for?

1 Mark(s)

Your Answer:

Media Access Control Media Access Control
Master Access Code Master Access Code
Main Address Code Main Address Code
Media Area Connect Media Area Connect

An object can have which of the following multiplicities?

1 Mark(s)

Your Answer:

Zero Zero
One One
More than one More than one
All of the above All of the above

In Ruby, what does the extend keyword do?

1 Mark(s)

Your Answer:

Adds methods from a module as class methods
Adds methods from a module as instance methods
Initializes a new instance Initializes a new instance
Calls a superclass method Calls a superclass method

Evaluating Your Answers

Ruby Mock Test 5 : Question 1 of 78