Explanation

Lion is to carnivores as rhino is to herbivore.

Reason: Lion eats only flesh and hence called a carnivores animal.

On the other hand, rhino eats vegetation only, hence called a herbivores animal.

Explanation

•  Active: Kindly open the window.
• Passive: You are requested to open the window.
• Formula: You are requested + to + V1 + object.

Explanation

مصنف: خواجہ الطاف حسین حالی

 وجہِ تصنیف: یہ نظم انہوں نے سرسید احمد خان کی فرمائش پر 1879ء میں لکھی۔

موضوع: اس طویل نظم میں اسلام کی گزری ہوئی عظمت، مسلمانوں کے شاندار ماضی کے کارناموں اور اس وقت کی پستی و زبوں حالی کا ذکر کیا گیا ہے۔

Explanation

• A group of cattle is most commonly called a herd. 

Additional information:

• Drove: Cattle being moved together.
• Fold: Cattle kept in an open shelter.
• Team/Yoke: Oxen harnessed together to pull loads.

Explanation

• Hashing converts data into a fixed-length hash value.
• It helps verify data integrity by detecting changes.
• It is used to store passwords securely as hashes.
• Hashing is a one-way process; the original data is not normally recoverable from the hash.

Explanation

• A DoS attack floods a system or server with excessive traffic or requests.
• It makes the service slow or unavailable to legitimate users.
• DDoS (Distributed Denial-of-Service): Uses multiple devices to launch the attack.

Explanation

• SQL injection exploits unsanitized or improperly handled user input in database queries.
• Attackers manipulate SQL statements to access or modify data without authorization.
• Prevention: Use parameterized queries (prepared statements).

Explanation

• COUNT(*) counts all rows in a table.
• If the table is empty, it returns 0.
• It counts rows regardless of NULL values in individual columns.

Explanation

• DISTINCT returns only unique rows or values.
• It removes duplicate results from a query.
• It is used with the SELECT statement.

Explanation

• A subquery is a query written inside another SQL query.
• It is enclosed in parentheses ().
• It can be used with SELECT, INSERT, UPDATE, and DELETE statements.