Explanation

The Pious Caliphs were the first four Caliphs.

They were:  Abu Bakr  Umar  Uthman  Ali

Explanation

Vacuum tubes as the basic components for memory and circuitry for CPU .

These tubes, like electric bulbs, produced a lot of heat and the installations used to fuse frequently.

First generation (1940 - 1956) vacuum tubes as a major piece of technology. 

The ENIAC is  example of 1st generation computer.

Second generation (1956 - 1963) use of transistors.

Third generation (1964 - 1971)  use of Integrated circuits.

Fourth generation (1972 - 2010) use of the microprocessor.

Fifth generation (2010 to present) use Artificial intelligence.

Explanation

Line spacing determines the amount of vertical space between lines of text in a paragraph.

By default, lines are single-spaced, meaning that the spacing accommodates the largest font in that line, plus a small amount of extra space.

Explanation

Salat-e-Khasoof is performed on the occasion of the Lunar eclipse (چاند گرہن)

It occurs in two or Four zakaah prayer 

It is a Nafli, not an obligatory prayer.

Additional information:

Salat ul  Kusuf (نمازكسوف)is a two or Four-zakaah prayer performed during a solar eclipseسورج گرہن,

Explanation

Avast and NAV are anti-virus software.

***

Symantec's Norton Group launched Norton AntiVirus 1.0 (NAV) for PC and compatible computers.

***

Avast's free antivirus software detects and blocks all types of malware in real-time to prevent them from infecting your computer.

Kaspersky, Norton, and Avast are anti-virus software.

***

Linux is an operating system not an anti-virus

anti virus 

Oracle is not an anti-virus software.

Explanation

Rajab is the seventh month of the Islamic calendar. 

Isra and Miraj (Muhammad's journey from Mecca to Jerusalem and then through the seven Heavens) took place in Rajab.

Must remember all 12 Islamic months name

List of Islamic Months

1. Muḥarram, محرم الحرام
   
2. Ṣafar, صفر المظفر
3. Rabi al Awwal ربیع الاول
4. Rabi al Sani ربیع الثانی
5. Jumada al Awwal جمادی الاول
6. Jumada al Thani جمادی الثانی
7. Rajab, رجب المرجب
8. Shabanشعبان المعظم
9. Ramadan(fasting), رمضان المبارک
10. Shawwal شوال المکرم
11. Dhu al Qadah ذوالقعدۃ الحرام
12. Dhu al Hijjah ذوالحجۃ الحرام:

Each month begins approximately at the time of the new moon.

Explanation

The Quit India Movement is also known as the August Movement.

It was launched by Gandhi on August 8, 1942, in Bombay.

The movement, started by the Congress party.

It's demanded an end to British rule in India.

Muhammad Ali Jinnah responded with the slogan "Divide and Quit India."

Explanation

Explanation

Explanation

A compiler is a translator program that converts a high-level language source program into a machine language object program.

کمپائلر ایک مترجم پروگرام ہے جو ایک اعلی سطحی زبان کے سورس پروگرام کو مشین لینگویج آبجیکٹ پروگرام میں تبدیل کرتا ہے۔