JavaScript Mock Test 12 - Online MCQ Exam

Plants growing in drier conditions tend to have small numbers of stomata on their lower leaf surface to save:

1 Mark(s)

Your Answer:

water loss water loss
stored sunlight stored sunlight
to prevent itself from consumers to prevent itself from consumers
energy loss energy loss

What will the following code output: my_list = [1, 2, 3] new_list = my_list.copy() print(new_list)

1 Mark(s)

Your Answer:

[1, 2, 3] [1, 2, 3]
[1, 2, 3, 1, 2, 3] [1, 2, 3, 1, 2, 3]
[1, 1, 2, 2, 3, 3] [1, 1, 2, 2, 3, 3]
[2, 1, 3] [2, 1, 3]

How can we make a C++ class such that objects of it can only be created using new operator? If user tries to create an object directly, the program produces compiler error.

1 Mark(s)

Your Answer:

Not possible Not possible
By making constructor private By making constructor private
By making both constructor and destructor private

FIFO stands for:

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Your Answer:

First In First Out First In First Out
Fast In Fast Out Fast In Fast Out
First Input First Output First Input First Output
File In File Out File In File Out

The shortcut key Ctrl + Shift + Esc is used to directly open which feature in Windows?

1 Mark(s)

Your Answer:

Control Panel Control Panel
File Explorer File Explorer
Task Manager Task Manager
Settings Settings

In the old-time, a user was connected to the Internet with a:

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Your Answer:

ISP ISP
ADSL ADSL
DSL DSL
dial up line dial up line

Which of the following applies to a class rather than an object?

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Your Answer:

Query Query
Update Update
Scope Scope
Constructor Constructor

Select the interfaces implemented by array class.

1 Mark(s)

Your Answer:

ICloneable, ICollection ICloneable, ICollection
IEnumerable, IStructuralComparable, IStructuralEquatable
ICloneable, ICollection, IList ICloneable, ICollection, IList
Only IEnumerable, IStructuralComparable, IStructuralEquatable & ICloneable, ICollection, IList

Reinforcement Learning involves:

1 Mark(s)

Your Answer:

Rewards/Penalties Rewards/Penalties
Labels Labels
Clusters Clusters
Regression Regression

In C#, which block is used to clean up resources in exception handling, regardless of whether an exception occurs or not?

1 Mark(s)

Your Answer:

throw throw
catch catch
finally finally
try try

Which of the following is the most preferred way of throwing and handling exceptions?

1 Mark(s)

Your Answer:

Throw by value and catch by reference. Throw by value and catch by reference.
Throw by reference and catch by reference.
Throw by value and catch by value Throw by value and catch by value
Throw the pointer value and provide catch for the pointer type.

How do you represent a hexadecimal number in C?

1 Mark(s)

Your Answer:

0x 0x
0h 0h
# #
$ $

Which STL container is suitable for implementing a priority queue?

1 Mark(s)

Your Answer:

vector vector
queue queue
deque deque
priority_queue priority_queue

fgets() is used to read a file one line at a time.

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Your Answer:

True True
False False

What is the difference between std::async and std::thread in C++ multi-threading?

1 Mark(s)

Your Answer:

std::async returns a std::future object representing the result of the asynchronous operation, while std::thread does not return anything
std::thread allows you to specify the execution policy, while std::async does not
std::async creates a new thread and executes a function asynchronously, while std::thread simply creates a new thread
std::thread provides more control over thread creation and management compared to std::async

How can you quickly reinstate a deleted footer placeholder in master view?

1 Mark(s)

Your Answer:

Create a new slide master Create a new slide master
Re-apply the footer placeholder Re-apply the footer placeholder
Re-apply the slide layout Re-apply the slide layout
All of the above All of the above

Which reference modifier is used to define reference variable?

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Your Answer:

& &
ref ref
# #
$ $

Presence of liquid and solid state is evidence of:

1 Mark(s)

Your Answer:

non polarized material non polarized material
polarized material polarized material
non crystalline material non crystalline material
crystalline material crystalline material

In unicast Routing, each node uses the same topology to create a routing table and the routing table for each node is:

1 Mark(s)

Your Answer:

reflective reflective
constant constant
unique unique
identical identical

tag is used in …

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Your Answer:

head head
body body
title title
none of these none of these

In a computer, expansion cards are inserted into:

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Your Answer:

slots of CPU slots of CPU
peripheral devices peripheral devices
hard disk of CPU hard disk of CPU
back of monitor back of monitor

HTML stands for:

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Your Answer:

HyperText Markup Language HyperText Markup Language
HyperText Make Language HyperText Make Language
HighText Markup Language HighText Markup Language
HyperLinks Text Language HyperLinks Text Language

Which one of the following can be considered as the example of the Front-end?

1 Mark(s)

Your Answer:

Web Browser Web Browser
Google Compute Engine Google Compute Engine
Cisco Metapod Cisco Metapod
Amazon Web Services Amazon Web Services

To get the current date, the . . . . . . . . function will return a Date object which can be converted to a different class if necessary.

1 Mark(s)

Your Answer:

Sys.Time Sys.Time
Sys.Date Sys.Date
Sys.DateTime Sys.DateTime
DateTime DateTime

A metal that is attractive and has a high value is:

1 Mark(s)

Your Answer:

gold gold
lead lead
Sulphur Sulphur
aluminum aluminum

Which of the following writes MapFiles as output?

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Your Answer:

DBInpFormat DBInpFormat
MapFileOutputFormat MapFileOutputFormat
SequenceFileAsBinaryOutputFormat SequenceFileAsBinaryOutputFormat
None of the mentioned None of the mentioned

A _________ identifies a location or a selection of text that you name and identify for future reference.

1 Mark(s)

Your Answer:

Bookmark Bookmark
Header Header
Page number Page number
None of these None of these

In order to email a Word document from within MS Word

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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

A magnetic disk's tracks are divided into smaller parts which is known as:

1 Mark(s)

Your Answer:

clusters clusters
sectors sectors
bytes bytes
slices slices

How do you define a generator function in Python?

1 Mark(s)

Your Answer:

Using the generator keyword Using the generator keyword
Using the def keyword and yield statement
Using the gen keyword Using the gen keyword
Using the function keyword Using the function keyword

Resource locking is a process to prevent multiple applications from obtaining copies of the same record when the record is about to be changed.

1 Mark(s)

Your Answer:

True True
False False

Absent any actual need for choosing one method over the other, does passing arrays by value to a read-only function reduce performance compared to passing them by reference?

1 Mark(s)

Your Answer:

Yes, because the interpreter must always create a copy of the array before passing it to the function.
Yes, but only if the function modifies the contents of the array.
Yes, but only if the array is large. Yes, but only if the array is large.
Yes, because PHP must monitor the execution of the function to determine if changes are made to the array.
No No

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JavaScript Mock Test 12 : Question 1 of 32