Which database key uniquely identifies a record?
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Correct Answer: D. Primary key
Explanation:
A primary key uniquely identifies each table row.
MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
What does URL identify?
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Correct Answer: A. The address of a resource on a network
Explanation:
A URL locates a resource such as a web page.
Which protocol is commonly used to transfer web pages securely?
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Correct Answer: B. HTTPS
Explanation:
HTTPS uses HTTP over encrypted transport.
What is recursion?
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Correct Answer: C. A process in which a function calls itself on smaller instances
Explanation:
Recursion solves a problem through smaller self-similar calls and a base case.
Which search method repeatedly halves a sorted search range?
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Correct Answer: D. Binary search
Explanation:
Binary search compares with the middle element and halves the remaining range.
What is a variable in programming?
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Correct Answer: A. A named storage location for a value
Explanation:
A variable associates a name with data that a program can use or change.
Which loop checks its condition before executing the body?
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Correct Answer: B. While loop
Explanation:
A while loop evaluates its condition before each iteration.
What is an operating system?
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Correct Answer: C. Software that manages hardware and provides services to programs
Explanation:
An operating system coordinates hardware resources and applications.
What is the next number: 7, 14, 28, 56, ___?
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Correct Answer: C. 112
Explanation:
Every term is multiplied by 2.
Therefore, 56 × 2 = 112.
What is an algorithm?
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Correct Answer: D. A finite sequence of steps for solving a problem
Explanation:
An algorithm is an ordered and finite problem-solving procedure.
Complete the series: 10, 13, 17, 22, 28, ___
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Correct Answer: D. 35
Explanation:
The successive increases are 3, 4, 5, and 6.
The next increase is 7, so 28 + 7 = 35.
Which logical operator is true only when both inputs are true?
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Correct Answer: A. AND
Explanation:
AND produces true only when both operands are true.