Interview Questions and Answers for 'T' | Search Interview Question

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Q2591. What is the difference between Merge and "Stash and Merge" ?

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Q2592. Do threads have a distinct heap ?

Memory Management

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Q2593. What resources are shared between threads ?

Threads

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Q2594. Can we do a thread specific heap allocation ?

Memory Management

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Q2595. How do you merge changes from master to your feature branch ?

Git

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Q2596. Do you ever merge changes from one feature branch to another ? Why ?

SCM

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Q2597. How can you delete a commit from a pull request ?

Git

Ans. By rolling back that commit in the branch

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Q2598. What does this warning message for the unit test means

WARN: 'Spec has no expectations.'

Angular

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Q2599. Which language is Git written in ? and What are it's benefits ?

Git

Ans. GIT is fast because it's written in C.

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Q2600. What is staging in GIT ?

Git

Ans. Before completing the commits, it can be formatted and reviewed in an intermediate area known as staging.

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Q2601. What is conflict in GIT ?

Git

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Q2602. What is GIT Stash ?

Git

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Q2603. How can you trim all strings in an array ?

Ans. array.map(s => s.trim())

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Q2604. Is it safe to use session storage ?

Javascript

Ans. 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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Q2605. Can we specify that a particular variable may have either of the two data types in Typescript ?

Typescript

Ans. let result: string | boolean;

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Q2606. How can we specify that a particular variable may have either of the two data types in Typescript ?

Typescript

Ans. Yes

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Q2607. How can we specify that a particular variable may have either of the two data types in Typescript ?

Typescript

Ans. let result: string | boolean;

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Q2608. What does the following declaration mean

let result: string | number;

Typescript

Ans. It means we can assign either a string or a number to result.

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Q2609. Will the following code give any error

let result: string | number;
result = true;

Typescript

Ans. Yes, result can either be string or a number but not boolean.

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Q2610. Will the following code give any error

let result: string | number;
result = 'true';

Typescript

Ans. No

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Q2611. Will the following code give any error

let result: string | number;
result = 'true';

Typescript

Ans. No

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Q2612. Will the following code give any error

let result: boolean;
result = false | true;

Typescript

Ans. Yes, | is a bitwise operator and not boolean or. Use || instead

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Q2613. Will this code give any error ?

let result: boolean;
result = false || true;

Typescript

Ans. No

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Q2614. Will this code give any error ?

let result: boolean | string;
result = false || 'true';

Typescript

Ans. No

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Q2615. Will this code give any error ?

let result: string;
result = false || 'true';

Typescript

Ans. No

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Q2616. What is systemd in Unix ?

Unix

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Q2617. What is Array.Map function ? What will be output of following ?

const myArray = [1, 4, 9, 16];
const result = myArray.map(x => x * 2);

Javascript

Ans. It will create an array with each value as x*2

[2, 8, 18, 32]

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Q2618. What would you use the span element for ?

HTML

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Q2619. What is a default constructor ? Reference

Core Java

a. Constructor without parameters declared by user

b. Constructor provided by Java if no constructor is declared

c. Constructor with empty body

d. All of the above

Ans.b. Constructor provided by Java if no constructor is declared

Q2620. How can we create objects if we make the constructor private ?

Core Java

a. We can't create objects if constructor is private

b. We can only create objects if we follow singleton pattern

c. We can only create one object

d. We can create new object through static method or static block

Ans.d. We can create new object through static method or static block

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