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M2 R5: Web Designing and Publishing

Javascript

Set 2

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1 Which of the following acts as the input of a class-based component?

निम्नलिखित में से कौन एक वर्ग - आधारित घटक के इनपुट के रूप में कार्य करता है?

Class

Props

Factory

None of the mentioned

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2 React.js is written in which of the following language?

React.js को निम्नलिखित में से किस भाषा में लिखा गया है?

C++

JavaScript

Java

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3 How many elements can a valid react component return?

एक मान्य अभिक्रिया घटक कितने तत्वों को वापस कर सकता है?

React doesn’t return element

1 Element

More than 1 element

None of the mentioned

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4 The web development environment (JavaScript) offers which standard construct for data validation of the input entered by the user.

वेब डेवलपमेंट एनवायरनमेंट (जावास्क्रिप्ट) उपयोगकर्ता द्वारा दर्ज किए गए इनपुट के डेटा सत्यापन के लिए कौन सा मानक निर्माण प्रदान करता है।

Controlled loop constructs

Server page access

Client side Event

Permit server-side

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5 The main purpose of a “Live Wire” in NetScape is to ________

नेटस्केप में "लाइव वायर" का मुख्य उद्देश्य ________ है

Create linkage between client side and server side

Permit server side, JavaScript code, to connect to RDBMS

Support only non relational database

To interpret JavaScript code

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6 The script tag must be placed in __________

स्क्रिप्ट टैग __________ में रखा जाना चाहिए

the head tag

the head or body

the title or head

after the body tag

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7 JavaScript is ideal to ________

जावास्क्रिप्ट ________ के लिए आदर्श है

make computations in HTML simpler

minimize storage requirements on the web server

increase the download time for the client

increase the loading time of the website

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8 Which attribute is used to specify that the script is executed when the page has finished parsing? (only for external scripts)

यह निर्दिष्ट करने के लिए किस विशेषता का उपयोग किया जाता है कि पृष्ठ के पार्सिंग समाप्त होने पर स्क्रिप्ट निष्पादित की जाती है? (केवल बाहरी स्क्रिप्ट के लिए)

parse

a sync

defer

type

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9 JavaScript can be written __________

जावास्क्रिप्ट को __________ लिखा जा सकता है

directly into JS file and included into HTML

directly on the server page

directly into HTML pages

directly into the css file

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10 A proper scripting language is a __________

एक उचित स्क्रिप्टिंग भाषा __________ है।

High level programming language

Assembly level programming language

Machine level programming language

Low level programming language

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11 The property of a primary expression is ____________

एक प्राथमिक अभिव्यक्ति का गुण ____________ है।

stand-alone expressions

basic expressions containing all necessary functions

contains variable references alone

contains only keywords

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12 The expression of calling (or executing) a function or method in JavaScript is called ________

जावास्क्रिप्ट में किसी फ़ंक्शन या विधि को कॉल (या निष्पादित) करने की अभिव्यक्ति को ________ कहा जाता है

Primary expression

Functional expression

Invocation expression

Property Access Expression

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13 What kind of expression is “new Point(2,3)”?

"नया बिंदु(2,3 )" किस प्रकार की अभिव्यक्ति है?

Primary Expression

Object Creation Expression

Invocation Expression

Constructor Calling Expression

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14 Which of the operator is used to test if a particular property exists or not?

ऑपरेटर में से किसका उपयोग यह जांचने के लिए किया जाता है कि कोई विशेष संपत्ति मौजूद है या नहीं?

exist

within

exists

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15 Among the following, which one is a ternary operator?

निम्नलिखित में से कौन सा एक टर्नरी ऑपरेटर है?

–

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16 “An expression that can legally appear on the left side of an assignment expression.” is a well known explanation for variables, properties of objects, and elements of arrays. They are called ___________

"एक अभिव्यक्ति जो कानूनी रूप से असाइनमेंट एक्सप्रेशन के बाईं ओर दिखाई दे सकती है।" चर, वस्तुओं के गुणों और सरणी के तत्वों के लिए एक प्रसिद्ध स्पष्टीकरण है। उन्हें ___________ कहा जाता है

Properties

Prototypes

Lvalue

Definition

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17 JavaScript is a _______________ language.

जावास्क्रिप्ट एक _______________ भाषा है।

Object-Oriented

High-level

Assembly-language

Object-Based

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18 A conditional expression is also called a _______________

एक सशर्त अभिव्यक्ति को _______________ भी कहा जाता है।

Alternative to if-else

Immediate if

If-then-else statement

Switch statement

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19 What is a block statement in JavaScript?

जावास्क्रिप्ट में ब्लॉक स्टेटमेंट क्या है?

conditional block

block that contains a single statement

both conditional block and a single statement

block that combines multiple statements into a single compound statement

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20 When an empty statement is encountered, a JavaScript interpreter __________

जब एक खाली कथन का सामना किया जाता है, तो एक जावास्क्रिप्ट दुभाषिया __________

Ignores the statement

Prompts to complete the statement

Throws an error

Shows a warning

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21 The enumeration order becomes implementation dependent and non-interoperable if ___________

गणना आदेश कार्यान्वयन पर निर्भर और गैर - हस्तक्षेप योग्य हो जाता है यदि ___________

If the object inherits enumerable properties

The object does not have the properties present in the integer array indices

The delete keyword is never used

Object.defineProperty() is not used

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22 What are the three important manipulations done in a for loop on a loop variable?

लूप वेरिएबल पर लूप के लिए किए गए तीन महत्वपूर्ण जोड़तोड़ क्या हैं?

Updation, Incrementation, Initialization

Initialization,Testing, Updation

Testing, Updation, Testing

Initialization,Testing, Incrementation

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23 One of the special features of an interpreter in reference with the for loop is that ___________

फॉर लूप के संदर्भ में एक दुभाषिया की विशेष विशेषताओं में से एक यह है कि ___________

Before each iteration, the interpreter evaluates the variable expression and assigns the name of the property

The iterations can be infinite when an interpreter is used

The body of the loop is executed only once

the iteration is finite when an interpreter is used

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24 What will happen if the body of a for/in loop deletes a property that has not yet been enumerated?

क्या होगा यदि एक फॉर/इन लूप का मुख्य भाग एक ऐसी संपत्ति को हटा देता है जिसे अभी तक गिना नहीं गया है?

The property will be stored in a cache

The loop will not run

That property will not be enumerated

The property will be enumerated

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25 What will be the step of the interpreter in a jump statement when an exception is thrown?

जब कोई अपवाद फेंक दिया जाता है, तो JUMP कथन में दुभाषिया का चरण क्या होगा?

The interpreter stops its work

The interpreter throws another exception

The interpreter jumps to the nearest enclosing exception handler

The interpreter throws an error

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