Interview Questions and Answers for 'C' | Search Interview Question

Interview Questions and Answers - Order By Newest

Q2731. Which change detection strategy do you use in your application and Why ?

Ans. We use ChangeDetectionStrategy.Push

As the application grows bigger , The default change detection strategy could become a performance overhead and hence should be avoided.

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Q2732. What are the different conditions that triggers view update in case of push ChangeDetectionStrategy ?

Angular

Ans. 1. Any change in Input
2. Any even originating from the component or it's child components
3. Explicit trigger

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Q2733. Have you ever had any problem with asynchronous programming due to race condition ?

Angular

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Q2734. Have you ever used sessionStorage ? What is the better way to store session information - sessionStorage or session cookie ?

Session Management

Ans. Session Cookie, because session storage can be accessed from XSS (Cross site Scripting) attacks but cookies (if set with "HttpOnly" and "Secure" flags) are more safer against these attacks.

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Q2735. What are the benefits of using UI framework like Angular , View js etc instead of plain vanilla js and html ?

Javascript

Ans. These frameworks facilitates easier product development and enhancement and maintainability by having separation of concerns ( using oops ) and helps in development of reusable libraries / components. So in nutshell , they make development and maintenance of large scale application easier.

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Q2736. Explain method overridding.

Core Java

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Q2737. What are the libraries and tools for cloud storage on GCP ?

Google Cloud Platform (GCP)

Ans. Console - GUI Interface
gsutil - Command Line Interface
Rest API - Using JSON or XML API

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Q2738. What do you know about Google Compute Engine ?

Google Cloud Platform (GCP)

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Q2739. How are the Google Compute Engine and Google App Engine related ?

Google Cloud Platform (GCP)

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Q2740. How does the pricing model work in GCP cloud ?

Google Cloud Platform (GCP)

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Q2741. What are the different methods for the authentication of Google Compute Engine API ?

Google Cloud Platform (GCP)

Ans. MS active directory concept and in GCP its Cloud Identity

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Q2742. What is Google BigQuery? What are the benefits of BigQuery for the data warehouse practitioners ?

Google Cloud Platform (GCP)

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Q2743. Could you walk me through and draw out a sketch of a recent architecture project you completed ?

architecture

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Q2744. What are the best practices for designing rest web services ?

Web Services

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Q2745. Can you share some of the best practices while designing authentication and authorization system ?

Authentication

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Q2746. How to swap two numbers without using a third variable?

Core Java

Ans. int a = 10;
int b = 20;

b = b + a; // now b is sum of both the numbers
a = b - a; // b - a = (b + a) - a = b (a is swapped)
b = b - a; // (b + a) - b = a (b is swapped)

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Q2747. What's the difference between an array and Vector?

Core Java

Ans. An array groups data of same primitive type and is static in nature while vectors are dynamic in nature and can hold data of different data types.

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Q2748. Can main() method in Java can return any data?

Core Java

Ans. In java, main() method can't return any data and hence, it's always declared with a void return type.

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Q2749. What is the difference between double and float variables in Java?

Core Java

Ans. In java, float takes 4 bytes in memory while Double takes 8 bytes in memory. Float is single precision floating point decimal number while Double is double precision decimal number.

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Q2750. What are Loops in Java? What are three types of loops?

Core Java

Ans. Looping is used in programming to execute a statement or a block of statement repeatedly. There are three types of loops in Java:
1) For Loops
For loops are used in java to execute statements repeatedly for a given number of times. For loops are used when number of times to execute the statements is known to programmer.
2) While Loops
While loop is used when certain statements need to be executed repeatedly until a condition is fulfilled. In while loops, condition is checked first before execution of statements.
3) Do While Loops
Do While Loop is same as While loop with only difference that condition is checked after execution of block of statements. Hence in case of do while loop, statements are executed at least once.

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Q2751. What are the different ways of creating threads in java?

Core Java

Ans. There are two ways to create the threads in java
a) By extending java.lang.Thread class.
b) By implementing java.lang.Runnable interface.

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Q2752. What are the differences between static and non-static methods?

Core Java

Ans. Static method is common to all instances of a class. Static methods are stored in the class memory. Whereas non-static methods are stored in the object memory. Each instance of a class will have their own copy of non-static methods.

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Q2753. How can print the whole object state in the console in javascript ?

Javascript

Ans. We can JSON.stringify

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Q2754. Which one of AWS Lambda or API Gateway is a compute service ?

Amazon Web Services (AWS)

Ans. AWS Lambda

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Q2755. What do you mean by inheritance in java?

Core Java

Ans. Inheritance is one of the key principle of object oriented programming. Through inheritance, one class can inherit the properties of another class. The class from which properties are inherited is called super class and the class to which properties are inherited is called sub class.

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Q2756. What are the fundamental principles of object oriented programming? / What are the OOPs concepts?

Core Java

Ans. a) Inheritance
b) Abstraction
c) Polymorphism
d) Encapsulation

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Q2757. What are the main features of Java?

Core Java

Ans. a) Object Oriented
b) Simple
c) Platform Independent
d) Secured
e) Robust
f) Portable
g) Multithreaded
h) Distributed

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Q2758. What is a pseudo-class?

CSS

Ans. It is a CSS technique that sets the style when an element changes its state. E.g. style changes when mouse hover, different styles for visited or unvisited links, etc.

There are four different types of pseudo-classes:

Links: These pseudo-classes are used to style the link both in its normal state by default and when it has already been visited
Dynamic: Dynamic pseudo-classes can be applied to any element to define how they are shown when the cursor is located on them, or by clicking on them or when they are selected
Structural: Structural pseudo-classes allow to style elements based on an exact numerical position of the element
Others: Some elements can be styled differently based on the language or what type of label they are not.
Format
Name
Elements are styled if
Compatibility
Link and Dynamic Pseudo-classes
: link   Link   the value of the href attribute is not in the history   IE4, FF1, O3.5, S1, CSS1
: visited   Link Visited   the value of the href attribute is in the history   IE4, FF1, O3.5, S1, CSS1
: target   Target Link   a targeted link   FF1.3, O9.5, S1.3, CSS3
: active   Active   the element has been clicked   IE7, FF1, O3.5, S1, CSS1
: hover   On   the cursor is over the element   IE4 *, FF1, O3.5, S1, CSS2
: focus   Focus   the element captures the focus of the document   IE7, FF1, O7, S1, CSS2
* Only available for the item before IE7
Structural and Other Pseudo-classes
: root   Root   is the main element of a document   FF1.5, O9.5, S3.1, C3, CSS3
: empty   Empty   does not have child nodes   FF1.5, O9.5, S3.1, C3, CSS3
: only-child   Only son   has no sibling nodes   FF1.5, O9.5, S3.1, C3, CSS3
: only-of-type   Type Only   has a unique selector among its siblings   FF1.5, O9.5, S3.1, C3, CSS3
: first-child   First son   is the first child node of another element   FF1.5, O9.5, S3.1, C3, CSS3
: nth-of-type (n)   Nth of Type   is the nth element with that selector   FF1.5, O9.5, S3.1, C3, CSS3
: last-child   Last son   is the last child node of an element   FF1.5, O9.5, S3.1, C3, CSS3
: first-of-type   First of the Kind   is the first element of its selector type in the parent element   FF1.5, O9.5, S3.1, C3, CSS3
: last-of-type   Last of the Type   is the last element of its selector type in the parent element   FF1.5, O9.5, S3.1, C3, CSS3
: lang   Language   has a specifically defined language code   IE8, FF1.5, O9.5, S3.1, C3, CSS2.1
: not   Denial   you are not using a specific selector   FF1.5, O9.5, S3.1, C3, CSS3

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Q2759. What is the difference between subscribe and emit ?

Angular

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Q2760. What is the difference between subscribe and unsubscribe ?

Angular

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