PERA PAST PAPERS AND SYLLABUS
فری تیاری کیلے وٹس ایپ
گروپ جوائن کریں
Click here
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
ہائیڈروجن کا کون سا آاسوٹوپ تابکار ہے؟
- Tritium
- Protium
- Deuterium
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Tritium (³H) is the radioactive isotope of hydrogen.
- It undergoes beta (β) decay and changes into Helium-3.
Additional information:
- Hydrogen Isotopes: 3 (Protium, Deuterium, Tritium)
- Protium (¹H): 1 proton, 0 neutrons (Stable)
- Deuterium (²H): 1 proton, 1 neutron (Stable)
- Tritium (³H): 1 proton, 2 neutrons (Radioactive)
- Half-life of Tritium: Approximately 12.3 years
Last verified on 04-08-2026
کمپیوٹرز کے درمیان ڈیٹا کی منتقلی کس کے ذریعے کی جاتی ہے؟
- Protocol
- Data Bus
- Both A and B
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Data transfer between computers is carried out through communication protocols.
- A protocol is a set of rules that allows computers to communicate and exchange data.
- Common network protocols ensure reliable and secure communication.
- Protocols are essential for the Internet and computer networks.
Last verified on 04-08-2026
کون سا پروگرام کمپیوٹر کے کام کرنے کو سمجھنے اور منظم کرنے میں مدد کرتا ہے؟
- FIFO
- OS
- SS
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- An Operating System manages and controls all computer hardware and software resources.
- It acts as an interface between the user and the computer hardware.
- The OS manages memory, files, devices, and running programs.
- Without an Operating System, a computer cannot function properly for users.
- Common operating systems include Windows, Linux, and macOS.
Last verified on 04-08-2026
- Numeric Keys
- Function Keys
- Toggle Keys
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Caps Lock and Num Lock are Toggle Keys.
- Because they switch a function ON and OFF with each press.
- Caps Lock turns uppercase typing on or off.
- Num Lock enables or disables the numeric keypad.
Additional information:
- Toggle Keys: Caps Lock, Num Lock, Scroll Lock
- Function Keys: F1–F12 (12 keys)
- Modifier Keys: Ctrl, Alt, Shift, Fn, Windows Key
- Navigation Keys: Home, End, Page Up, Page Down, Arrow Keys
Last verified on 04-08-2026
پیراگراف کو سینٹر میں کرنے کے لیے کونسی کی استعمال کرتے ہیں؟
- Ctrl + E
- Ctrl + S
- Ctrl + C + A
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Ctrl + E is the shortcut used to apply center alignment in MS Word.
Additional information:
- Ctrl + L → Left Alignment
- Ctrl + R → Right Alignment
- Ctrl + J → Justify Alignment
Last verified on 06-03-2026
جیولین تھرو میں پاکستان کے لیے گولڈ میڈل کس نے جیتا؟
- Arshad Nadeem
- Nadeem Raza
- Ahsan Iqbal
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Winner: Arshad Nadeem
- Winning Throw: 92.97 m
- Medal: Gold
- Date: 8 August 2024
- Origin: Mian Channu, Pakistan
- Previous Olympic Record: 90.57 m by Andreas Thorkildsen (Beijing 2008)
- Global Ranking: Sixth longest throw ever; best in the world in 2024
Last verified on 02-02-2026
کون سا فٹ بال کلب 2024 اور 2025 یونین آف یورپین فٹ بال ایسوسی ایشن چیمپئنز لیگ کا فاتح ہے؟
- Real Madrid
- Manchester United
- Paris Saint-Germain
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Winner: Paris Saint-Germain (French Football Club)
- Runners-up: Milan (Italian Club)
- Final held on 31 May 2025
- Final held in Munich city of Germany
Additional information:
- UEFA stands for Union of European Football Associations.
- UEFA is the governing body of football in Europe.
Last verified on 04-08-2026
سن 1973 کے آئین کے تحت پاکستان کے صدر کا انتخاب کون کرتا ہے؟
- National Assembly
- Provincial Assemblies
- Senate
- All of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Under the 1973 Constitution of Pakistan, the President is elected by an Electoral College consisting of the:
- National Assembly
- Senate
- Provincial Assemblies (Punjab, Sindh, Khyber Pakhtunkhwa, Balochistan)
Constitution Introduced: 14 August 1973
- President's Term: 5 years
- Minimum Age for President: 45 years
Last verified on 26-07-2026
سن 2026 میں دنیا کی آبادی کتنی ہوگی؟
- 6.5 billion
- 7.0 billion
- 8.3 billion
- 8.8 billion
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- The world population in 2026 is approximately 8.3 billion.
- This reflects ongoing global population growth.
Top 5 most populous countries in 2025:
- India
- China
- United States
- Indonesia
- Pakistan
Last verified on 26-07-2026
ایس کیو ایل کا مطلب کیا ہے؟
- Structured Query Language
- Sequence Query Language
- Structured Query Logo
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Full Form: Structured Query Language
- SQL is the standard language used to store, retrieve, update, and manage data in relational databases.
Additional information:
- Designed by: Donald D. Chamberlin & Raymond F. Boyce
- First appeared: 1974
- Latest ISO Standard: SQL:2016 (December 2016)
- Main SQL Commands: SELECT, INSERT, UPDATE, DELETE, CREATE
Last verified on 22-07-2026